REG - Resolute Mining Ltd - Group Exploration Update - Senegal and Guinea
12/09/2024 07:00
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RNS Number : 8764D Resolute Mining Limited 12 September 2024
12 September 2024
Increased Mineral Resource at Mako Satellite Tomboronkoto and Initial Mineral
Resource Declared at Mansala in Guinea
Resolute Mining Limited ("Resolute" or "the Company") (ASX/LSE: RSG) is
pleased to provide an update on exploration in Senegal and Guinea.
In Senegal, Resolute has been focusing on three potential satellite deposits -
Tomboronkoto, Bantaco and Laminia - that could extend the life of the Mako
mine. Tomboronkoto is the most advanced prospect with an Indicated and
Inferred Mineral Resource Estimate (MRE). The other satellite deposit which
has drilling ongoing is Bantaco which has extensive artisanal workings; an
update is expected in Q4 2024.
In parallel, Resolute has been undertaking 'Greenfields' exploration on
projects located within the Siguiri Basin in Guinea. The most advanced
Prospect is Mansala which has an initial Inferred MRE and remains the focus
for the Company in Guinea.
Highlights
Senegal, Tomboronkoto
• Total contained gold at Tomboronkoto has increased by at least 30%
from the initial MRE announced in January to over 343 koz (initial MRE: 264
koz) grading 2.1g/t Au at 1g/t cut off or 571 koz (initial MRE: 403 koz)
grading 1.1 g/t at 0.5 g/t cut-off
• Infill drilling program down to 150m was highly successful with 87%
of the updated Mineral Resource classified in the Indicated category
• Mineralisation remains open down dip and along strike to the
southwest
• Preliminary metallurgical test-work performed by Resolute on samples
from Tomboronkoto show the mineralisation is free milling with recoveries
exceeding 90% from both weathered and fresh material
• Drilling is ongoing and the focus over the remainder of 2024 will be
to complete an additional 7,000m of diamond drilling aiming to further expand
the Tomboronkoto Mineral Resource
• A more accurate timeline on the potential development of
Tomboronkoto is expected in Q1 2025 together with an update from the drilling
over the remainder of 2024
Senegal, Bantaco
• RC drilling is ongoing at the Bantaco Joint Venture which was signed
by Resolute in early 2024
• An update on the program of wide spaced drilling to traverse the
outcropping gold mineralisation and coincident geochemical anomalies is
expected in Q4 2024
Guinea, Mansala
• Drilling to date has outlined a gold mineralised shear zone over
1.5km long and an Inferred Mineral Resource of 6.6Mt grading 1.6 g/t Au for
343 koz at a cut-off of 1 g/t
• The Mansala Mineral Resource remains open along strike and down dip
and future work will focus on expanding this resource
• Pending future drilling results Resolute will assess how the Mansala
Prospect fits into the Company's organic growth strategy
Terry Holohan, CEO and Managing Director, commented:
"We are progressing well with our priority of extending the life of the Mako
operation with further drilling success and a significant increase in the
Mineral Resources at the Tomboronkoto project which is close to the Mako
processing facility. Engineering work is progressing in parallel to ensure
an investment decision can be made on this project in early 2025.
At the same time the drilling results at the nearby Bantaco project are also
starting to intersect mineralisation close to surface and we will publish
these results in due course.
We are also pleased to publish the initial exploration discovery from our 100%
held greenfields Niagassolo project in Guinea. Drilling over the past year
has led to the completion of an initial Mineral Resource Estimate at the newly
named Mansala Prospect.
We recently agreed terms of an earn-in for a project in Cote D'Ivoire and this
will be announced soon subject to finalising our due diligence.
Along with the ongoing drilling programs at the Syama Greenstone Belt
continuously discovering more gold we will shortly have exploration drilling
programs ongoing in four jurisdictions in West Africa and we remain keen to
look at further opportunities in this highly prospective region."
Tomboronkoto, Senegal
Tomboronkoto is located 16km east of the Mako Processing Plant - see Figure 1.
It is approximately 20km by road and, therefore pending studies, we are
confident of the opportunity for hauling material to the existing Plant.
Tomboronkoto is the most advanced of the three potential satellite deposits
that could result in an extension to the Mako mine. Drilling is continuing at
Tomboronkoto to further expand the resource with a more accurate timeline on
development of the prospect expected in Q1 2025.
Figure 1: Senegal Geology and Project Locations.
Drilling Program
Resolute continued the drilling program at Tomboronkoto throughout 2024 with a
combination of Reverse Circulation (RC) and diamond drilling using multiple
drill rigs. For the year to date a total of 26 diamond holes for 6,000
metres and 66 RC holes for 10,263m of drilling has been completed.
The drilling program in 2024 has been focused on upgrading the classification
of the Initial Mineral Resource reported to the ASX on 24 January 2024 which
was 100% in the Inferred category. As of the latest updated MRE in August 2024
a total of 87% of the current Mineral Resource is classified as Indicated
category. The Resource conversion to Indicated category is required to allow
declaration of Ore Reserves following mining and geotechnical studies.
Significant intersections are listed in Appendix 1.
Figure 2. Tomboronkoto Drone Imagery and Drillhole Locations
Mineralisation
Gold mineralisation at Tomboronkoto is hosted within a north-east striking
shear zone in a granodiorite intrusive. Increasing gold grade appears to
correlate with the intensity of pyrite development and exhibits good lateral
and vertical continuity through the mineralised zone.
Mineralisation has a relatively simple geometry comprising a zone that varies
from 30 to 60m in width, along the 1,700m strike length drilled to date. The
zone dips approximately 70⁰ to the south-southeast - a cross-section
representative of the typical mineralisation shape is shown on Figure 3.
Figure 3: Cross Section Tomboronkoto
Mineral Resource Estimate
The Tomboronkoto MRE was re-estimated in August 2024 using wireframe
constrained Ordinary Kriged estimation methodology, within two nested Leapfrog
Indicator wireframes at 0.2 g/t Au and 0.75g/t Au.
A Global Mineral Resource Estimate of 15.5Mt grading 1.1g/t Au for 571,000oz
was estimated at a cut-off of 0.5g/t (in-line with the current cut-off grade
used to define Mako's Mineral Resources). At a higher 1g/t cut off the grade
increases to 2.1g/t with a total of 343,000oz Au. Further cost analysis is
required to determine the appropriate cut-off grade for Tomboronkoto.
Resource definition infill drilling at Tomboronkoto was very successful with
100% conversion of the all the previously reported Inferred Mineral Resources
quoted in January 2024 to the Indicated category in the August 2024 MRE
update. A total of 87% of the current Mineral Resource is classified as
Indicated category which will underpin the upcoming studies to declare an Ore
Reserve at Tomboronkoto.
The updated MRE is an increase of 30% over the initial MRE using a cut off of
1g/t Au. The Tables below include the initial Inferred MRE announced in
January 2024 and the latest updated MRE from August 2024.
Tomboronkoto Mineral Resource (0.5g/t Au cut-off)
At December 2023 At August 2024
Classification Tonnes Grade Ounces (Au) Tonnes Grade Ounces (Au)
(g/t Au) (g/t Au)
Inferred 10,204,000 1.2 403,000 2,300,000 1.0 75,000
Indicated - - - 13,190,000 1.2 496,000
Total 10,204,000 1.2 403,000 15,500,000 1.1 571,000
Table 1: Tomboronkoto Mineral Resources at December 2023 and August 2024
(0.5g/t cut off)
Tomboronkoto Mineral Resource (1g/t Au cut-off)
At December 2023 At August 2024
Classification Tonnes Grade Ounces (Au) Tonnes Grade Ounces (Au)
(g/t Au) (g/t Au)
Inferred 3,685,000 2.2 264,000 613,000 1.9 38,000
Indicated - - - 4,439,000 2.1 305,000
Total 3,685,000 2.2 264,000 5,052,000 2.1 343,000
Table 2: Tomboronkoto Mineral Resources at December 2023 and August 2024 (1g/t
cut off)
Future Work
To date the Tomboronkoto deposit is only drilled to 150m below surface and is
open down dip. Drilling is currently targeting the extensions of the resource
between 150m and 200m below surface. Preliminary results suggest that the
mineralisation is continuous down dip.
Drilling at Tomboronkoto will concentrate on open pit extractable Mineral
Resources with the expectation that it will provide mill feed for the Mako
treatment facility.
Preliminary metallurgical test work was undertaken by Resolute on Reverse
Circulation samples from the recent drilling campaign conducted at
Tomboronkoto. This showed the mineralisation is free milling with recoveries
exceeding 90% from both weathered and fresh material.
Drilling is ongoing and the focus over the remainder of 2024 will be to
complete an additional 7,000m of diamond drilling with the aim of further
expanding the Tomboronkoto Mineral Resource.
Bantaco, Senegal
Resolute is in a Joint Venture with SNEPAC, a local Senegalese company, to
earn into the Bantaco prospect located approximately 20km east of Mako.
The Bantaco project presents an opportunity in the short term to find an
economically exploitable gold resource to extend the life of Mako. The
project area has extensive artisanal workings in two main locations, Baisso in
the southwest and Bantaco in the northeast of the permit.
Drilling commenced in June 2024 and is ongoing. An update on the program of
wide spaced drilling to traverse the outcropping gold mineralisation and
coincident geochemical anomalies is expected in Q4 2024.
Guinea Exploration
Resolute controls three exploration projects in Guinea, the 100% owned
Niagassola and Siguiri-Kouroussa projects and the Kourouba Joint Venture.
The Niagassola and Siguiri-Kouroussa Projects lie on major North-South
striking regional structures within the Siguiri Basin. The Kourouba Joint
Venture is located on a series of mafic volcanics units on the western margin
of the Siguiri Basin.
Over the past three years Resolute conducted standard regional exploration
techniques over these Greenfields projects. Programs of regional mapping,
soil geochemistry and rock chip sampling identified a number of areas with
gold anomalies. These areas were tested with auger drilling programs which
further defined the anomalous zones.
Figure 4. Guinea Geology and Project Locations
Mansala Prospect
Regional soil and rock chip geochemistry over the entire area of the
Niagassola Project identified an area of strong gold anomalism on the western
edge of the permit.
This anomaly was followed up by regional auger and air core drilling which
further outlined an extensive zone of gold mineralisation.
Reverse Circulation (RC) and diamond drilling programs in 2023 and 2024 have
successfully discovered a previously unknown gold zone now named the Mansala
Prospect.
Drilling to date has confirmed a north striking 1.5km long gold mineralised
shear zone. Mineralisation is interpreted to be steeply-dipping and wholly
hosted within sedimentary units. Intensity of gold mineralisation correlates
with sedimentary grain size, arsenopyrite and quartz vein development and
exhibits good lateral and vertical continuity throughout the zone.
Significant intersections are shown in Appendix 1.
Mineral Resource Estimation
An Initial Mineral Resource Estimate for the Mansala Prospect was undertaken
in Q2 2024. Estimation methodology was comprised of wireframe constrained
Ordinary Kriged techniques. A summary of the Mansala Resource Parameters is
show on the following pages.
A global Mineral Resource of 6.6million tonnes at a grade of 1.6g/t Au for a
total of 343,000oz of gold using a cut off of 1g/t Au has been estimated at
Mansala.
Drilling to date is on 100m spaced lines therefore Resource classification is
100% Inferred category.
Mansala Mineral Resource (1g/t Au cut-off)
Classification Tonnes Grade (g/t Au) Ounces (Au)
Inferred 6,625,000 1.6 343,000
Total 6,625,000 1.6 343,000
Table 3: Mansala Mineral Resources at August, 2024 (1g/t cut off)
Future Work
The mineralisation zone at Mansala is open along strike to the north and south
and down dip. Drilling programs to extend the resources are planned to
recommence later in 2024 after the conclusion of the wet season in Guinea.
A prospect scale Geophysical IP survey also identified an offset to the west
of the northern extensions of the mineralisation. This new target will be
tested in H2 2024.
Pending future drilling results Resolute will assess how the Mansala Prospect
fits into the Company's organic growth strategy
Figure 5: Mansala drillhole location and drone imagery
Figure 6. Mansala Cross Section
Summary of Tomboronkoto Resource Parameters
A summary of JORC Table 1 is provided below for compliance regarding the
Mineral Resources reported within and in-line with requirements of ASX Listing
Rule 5.8.1.
Geology and geological interpretation
Mineralisation is currently interpreted to be within a shear in the
granodiorite unit. Intensity of gold mineralisation appears to correlate with
the intensity of pyrite development and exhibits good lateral and vertical
continuity through the mineralised zone.
Mineralisation has a relatively simple geometry comprising a zone that varies
from 30 to 60m in width, along the 1,700m strike length drilled to date. The
zone dips approximately 70⁰ to the south-southeast.
Sampling and sub-sampling techniques
Reverse circulation samples were collected on 1m intervals by riffle split
(dry) or by scoop (wet) to obtain a 1-3kg sample.
Sample preparation includes oven drying, crushing to 10mm, splitting and
pulverising to 85% passing -75µm. These preparation techniques are deemed to
be appropriate to the material being sampled.
Reverse circulation and core field duplicates were collected by the company at
a rate of 1:20 samples.
Sampling, sample preparation and quality control protocols are of industry
standard, and all attempts were made to ensure an unbiased representative
sample was collected.
Drilling techniques
Drill types used include reverse circulation with face sampling bit and
historic core drilling using PQ and HQ sized bits. All Resolute drilling to
date has been RC. Historic core drilling has been incorporated into the
resource.
Sample analysis method
All samples were dispatched to ALS Kedougou for sample preparation and to ALS
Ouagadougou for gold analysis by 30g fire assay fusion with AAS instrument
finish (method code Au-AA25). Over-range results were re-analysed and reported
by 30g fire assay fusion with gravimetric finish (method code Au-GRA21). The
analytical method was appropriate for the style of mineralisation.
No geophysical tools were used to determine elemental concentrations.
Quality control (QC) procedures included the use of certified standards
(1:40), non-certified sand blanks (1:40) and reverse circulation/core field
duplicates (1:20).
Laboratory quality control data, including laboratory standards, blanks,
duplicates, repeats, grind size results and sample weights were also captured
into the digital database.
Analysis of the QC sample assay results indicates that an acceptable level of
accuracy and precision has been achieved.
Basis for selected cut-off grade
The cut-off grades selected has been selected using previous Resource
(0.5 g/t Au) and Reserve (1.0 g/t Au) cut-off grades used at the nearby
Mako deposit.
Mining and metallurgical methods and other material modifying factors
Extensive metallurgical investigations and reporting have been completed prior
to the commencement of mining and milling at the nearby Mako deposit.
The processing method involves crushing, and milling, followed by conventional
CIL recovery.
There is no evidence to suggest that the metallurgical characteristics of ore
extracted from Tomboronkoto would change from that encountered at Mako.
Preliminary metallurgical test-work on samples from Tomboronkoto show similar
characteristics to the Mako ore and is expected to be treated though the
existing circuits.
Classification criteria
Mineral Resources were classified in accordance with the Australasian Code for
the Reporting of Exploration Results, Mineral Resources and Ore Reserves
(JORC, 2012).
The deposit has been classified as Indicated or Inferred Mineral Resource
based on a combination of quantitative and qualitative criteria which include
geologic continuity, confidence in volume models, data quality, sample
spacing, lode continuity, and estimation parameters (number of informing
composites, estimation pass number, kriging quality parameters, and minimum
and average distance composites).
The Indicated portion of the resource was defined within a wireframe
constructed around blocks estimated in the first two passes, where drilling
density is equal to or exceeding 25x25m spacing, and Kriging efficiency is
generally greater than or equal to 0.6. Mineralisation not classified as
Indicated has been classified as Inferred.
Summary of Mansala Resource Parameters
A summary of JORC Table 1 is provided below for compliance regarding the
Mineral Resources reported and in-line with requirements of ASX Listing Rule
5.8.1
Geology and geological interpretation
Mineralisation is interpreted to be steeply-dipping within the sedimentary
unit. Intensity of gold mineralisation correlates with sedimentary grain size,
the intensity of arsenopyrite and quartz vein development and exhibits good
lateral and vertical continuity throughout the mineralised zone.
Mineralisation has a geometry of approximately 40m width, and 1,000m strike
length.
Sampling and sub-sampling techniques
Sampling has been conducted by diamond drill coring and reverse circulation
drilling.
Diamond core has been logged to geological contacts and sampled at 1m
intervals. All core is assayed and cut lengthwise into half core with a
diamond blade rock saw, numbered, and bagged for dispatch.
Reverse circulation chips are logged and sampled at 1m intervals. Every
interval is assayed, with chips systematically divided into 1/8 proportion
using a riffle splitter after the sample is recovered from the cyclone.
Samples are numbered and bagged prior to dispatch.
Reverse circulation and core duplicates are collected at a rate of 1 duplicate
to 20 samples. Blanks or certified reference material are inserted at a rate
of 1 to 20 samples.
Drilling techniques
Diamond core drilling with NTW diameter to target depth, with some NQ2
diameter as tails where possible. Reverse circulation drilling with 4" or 4.5"
hammer and 4" rod string to target.
Classification criteria
Mineral Resources were classified in accordance with the Australasian Code for
the Reporting of Exploration Results, Mineral Resources, and Ore Reserves
(JORC, 2012).
The deposit has been classified entirely as Inferred based on a combination of
quantitative and qualitative criteria including geologic continuity,
confidence in volume models, data quality, sample spacing, and estimation
parameters.
Drill lines are relatively widely-spaced, and do not support a classification
above Inferred.
Sample analysis method
All samples are analysed with 30g fire assay fusion with AAS instrument finish
(method code Au_AA25). Over-range results are re-analysed and reported by 30g
fire assay fusion with gravimetric finish (method code Au-GRA21).
Analysis of QC sample assay results indicates an acceptable level of accuracy
and precision.
Basis for selected cut-off grade
The cut-off grade selected is consistent with other deposits in the Siguiri
basin.
Mining and Metallurgical methods and other modifying factors
The shallow occurrence of the mineralisation indicates that open pit mining is
appropriate, in line with other deposits in the area. The estimation
methodology used results in an amount of edge dilution being incorporated into
the model. No account of mining loss has been incorporated.
No specific assumptions were made regarding metallurgical factors.
Contact
Resolute Public Relations
Matthias O'Toole-Howes Jos Simson, Tavistock
matthias.otoolehowes@resolutemining.com (mailto:contact@rml.com.au) resolute@tavistock.co.uk (mailto:resolute@tavistock.co.uk)
+44 207 920 3150
Corporate Brokers
Jennifer Lee, Berenberg
+44 20 3753 3040
Tom Rider, BMO Capital Markets
+44 20 7236 1010
Authorised by Mr Terry Holohan, Managing Director and Chief Executive Officer
Competent Persons Statement
The information in this report that relates to the Exploration Results,
Mineral Resources and Ore Reserves is based on information compiled by Mr
Bruce Mowat, a member of The Australian Institute of Geoscientists. Mr Bruce
Mowat has more than 5 years' experience relevant to the styles of
mineralisation and type of deposit under consideration and to the activity
which he is undertaking to qualify as a Competent Person, as defined in the
2012 Edition of the "Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves" (the JORC Code). Mr Bruce Mowat is a
full-time employee of the Resolute Mining Limited Group and holds equity
securities in the Company. He has consented to the inclusion of the matters in
this report based on his information in the form and context in which it
appears. This information was prepared and disclosed under the JORC Code 2012
except where otherwise noted.
The information in this announcement that relates to the Mineral Resource
estimate has been based on information and supporting documents prepared by Mr
Patrick Smillie, a Competent Person who is a Registered Member of the Society
for Mining, Metallurgy, and Exploration (SME). Mr Smillie is a full-time
employee Resolute Mining Limited Group and has sufficient experience relevant
to the style of mineralisation and type of deposit under consideration and to
the activity which has been undertaken to qualify as a Competent Person. Mr
Smillie confirms that the Mineral Resource estimate is based on information in
the supporting documents and consents to the inclusion in the report of the
Mineral Resource estimate and related content based on the information in the
form and context in which it appears.
Cautionary Statement about Forward-Looking Statements
This announcement contains certain "forward-looking statements" including
statements regarding our intent, belief or current expectations with respect
to Resolute's business and operations, market conditions, results of
operations and financial condition, and risk management practices. The words
"likely", "expect", "aim", "should", "could", "may", "anticipate", "predict",
"believe", "plan", "forecast" and other similar expressions are intended to
identify forward-looking statements. Indications of, and guidance on, future
earnings, anticipated production, life of mine and financial position and
performance are also forward-looking statements. These forward-looking
statements involve known and unknown risks, uncertainties and other factors
that may cause Resolute's actual results, performance and achievements or
industry results to differ materially from any future results, performance or
achievements, or industry results, expressed or implied by these
forward-looking statements. Relevant factors may include (but are not limited
to) changes in commodity prices, foreign exchange fluctuations and general
economic conditions, increased costs and demand for production inputs, the
speculative nature of exploration and project development, including the risks
of obtaining necessary licences and permits and diminishing quantities or
grades of reserves, political and social risks, changes to the regulatory
framework within which Resolute operates or may in the future operate,
environmental conditions including extreme weather conditions, recruitment and
retention of personnel, industrial relations issues and litigation.
Forward-looking statements are based on Resolute's good faith assumptions as
to the financial, market, regulatory and other relevant environments that will
exist and affect Resolute's business and operations in the future. Resolute
does not give any assurance that the assumptions will prove to be correct.
There may be other factors that could cause actual results or events not to be
as anticipated, and many events are beyond the reasonable control of Resolute.
Readers are cautioned not to place undue reliance on forward-looking
statements, particularly in the current economic climate with the significant
volatility, uncertainty and disruption caused by the COVID-19 pandemic.
Forward-looking statements in this document speak only at the date of issue.
Except as required by applicable laws or regulations, Resolute does not
undertake any obligation to publicly update or revise any of the
forward-looking statements or to advise of any change in assumptions on which
any such statement is based. Except for statutory liability which cannot be
excluded, each of Resolute, its officers, employees and advisors expressly
disclaim any responsibility for the accuracy or completeness of the material
contained in these forward-looking statements and excludes all liability
whatsoever (including in negligence) for any loss or damage which may be
suffered by any person as a consequence of any information in forward-looking
statements or any error or omission.
Appendix 1: Recent Drilling Results
Mansala
Hole_ID North (WGS) East (WGS) RL Dip Azi EOH From To Width Au
(m) (WGS) (m) (m) (m) (m) (g/t)
NGDD0003 1300395 486172 508 -50 266 229.5 51 79 28 1.25
NGDD0003 115 136 21 1.83
NGDD0008 1300004 486115 510 -50 270 251 117 146 29 1.38
NGDD0009 1299889 486116 561 -50 270 280 167 177 10 2.52
NGRC0042 1300188 486098 509 -49 270 159 40 65 25 1.77
NGRC0042 82 129 47 1.29
NGRC0042A 1300190 486099 509 -50 270 61 39 61 22 1.72
NGRC0043 1300290 486127 522 -50 270 190 44 60 16 2.24
NGRC0043 67 78 11 2.74
NGRC0044 1300293 486077 531 -48 270 123 22 45 23 2.35
NGRC0044A 1300295 486077 531 -48 270 63 14 44 30 1.97
NGRC0045 1300389 486098 531 -48 270 105 1 16 15 2.83
NGRC0046 1300524 486172 497 -49 270 183 47 92 45 1.31
NGRC0046 102 127 25 2.06
NGRC0048 1300598 486178 497 -51 270 126 44 59 15 1.74
NGRC0049 1300709 486275 470 -47 270 222 173 201 28 1.71
NGRC0050 1300707 486223 475 -49 270 180 18 55 37 1.57
NGRC0051 1300707 486170 483 -50 270 121 40 60 20 2.23
NGRC0054 1300104 486122 501 -50 270 211 128 159 31 2.4
NGRC0055 1300099 486083 513 -50 270 160 68 85 17 2.56
NGRC0056 1300102 486028 525 -47 266 103 20 48 28 2.45
NGRC0057 1300011 486038 539 -49 269 120 56 84 28 1.07
Notes to Accompany Table:
• Grid coordinates are WGS84 Zone 29 North
• RC intervals are sampled every 1m by dry riffle splitting or
scoop to provide a 1-3kg sample
• Diamond core are sampled every 1m by cutting the core in half to
provide a 2-4kg sample
• Cut-off grade for reporting of intercepts is >0.5g/t Au with
a maximum of 3m consecutive internal dilution included within the intercept;
only intercepts >=3m and >25 gram x metres are reported
• Samples are analysed for gold by 30g fire assay fusion with AAS
instrument finish; over-range results are reanalysed by 30g fire assay fusion
with gravimetric finish
Tomboronkoto
Hole_ID North (WGS) East (WGS) RL Dip Azi EOH From To Width Au
(m) (WGS) (m) (m) (m) (m) (g/t)
TBDD0001 1416657 794102 103 -60 338 133 35 61 26 1.14
TBDD0001 66 84 18 2.15
TBDD0003 1416683 794000 104 -59 161 183 82 106 24 1.43
TBDD0004 1416580 793893 106 -61 339 173 55 102 47 2.75
TBDD0006 1416706 793948 104 -61 160 230 0 82 82 1.85
TBDD0007 1416677 793888 119 -61 159 208 0 77 77 1.34
TBDD0007 122 162 40 0.89
TBDD0008 1416662 793682 109 -60 158 271 244 270 26 2.36
TBDD0010 1416607 793859 106 -61 341 151.5 22 71 49 2.97
TBDD0011 1416552 793807 104 -61 341 170 49 106 57 3.81
TBDD0012 1416568 793688 105 -60 159 195 19 42 23 1.18
TBDD0012 146 164 18 3.03
TBDD0013 1416556 793667 105 -64 233 205 0 91 91 1.34
TBDD0014 1416557 793665 105 -50 232 209 0 57 57 1.39
TBDD0014 98 126 28 1.16
TBDD0015 1416557 793668 105 -61 160 187.5 0 38 38 1.44
TBDD0016 1416596 793750 108 -60 160 239 0 19 19 1.39
TBDD0016 60 132 72 1.38
TBDD0016 137 144 7 8.2
TBDD0017 1416675 793789 116 -60 162 271.5 133 166 33 1.25
TBDD0017 186 265 79 1.52
TBRC00056 1416631 794109 107 -90 0 160 59 85 26 1.03
TBRC00059 1416678 794038 106 -61 336 195 22 63 41 1.95
TBRC00059 148 158 10 7.94
TBRC00063 1416679 794094 101 -61 340 100 11 72 61 1.84
TBRC00064 1416712 794078 100 -60 340 78 14 49 35 1.44
TBRC00066 1416698 794059 102 -60 160 162 120 152 32 0.99
TBRC00069 1416704 793978 101 -62 160 138 8 67 59 2.29
TBRC00069A 1416700 793975 102 -62 160 200 25 64 39 2.43
TBRC00072 1416711 793921 106 -61 160 186 0 83 83 1.42
TBRC00074 1416630 793709 109 -61 160 230 208 229 21 3.73
TBRC00075 1416681 793931 105 -59 160 186 6 40 34 1.21
TBRC00075 44 65 21 1.42
TBRC00075 78 96 18 3.16
TBRC00075 101 126 25 1.37
TBRC00078 1416603 793648 106 -61 160 240 116 132 16 2.72
TBRC00078 224 239 15 3.95
TBRC00080 1416303 793436 99 -60 160 140 4 29 25 3.37
TBRC00090 1416324 793477 99 -60 160 151 6 50 44 1.94
TBRC00090 57 80 23 1.28
TBRC00091 1416574 793663 106 -61 160 168 0 108 108 1.58
TBRC00093 1416568 793760 104 -61 160 200 9 22 13 3.47
TBRC00097 1416555 793879 106 -62 340 190 91 130 39 1.67
TBRC00102 1416654 793914 105 -61 160 132 22 35 13 2.12
TBRC00102 39 132 93 2.32
TBRC00103 1416674 793911 100 -62 160 174 0 81 81 1.51
TBRC00103 122 151 29 0.97
TBRC00104 1416583 793869 110 -60 340 162 52 95 43 2.33
TBRC00105 1416562 793820 105 -60 340 81 50 81 31 1.3
TBRC00106 1416648 793898 105 -60 340 120 10 33 23 2.3
TBRC00107 1416648 793898 105 -60 160 180 57 124 67 2.32
TBRC00108 1416616 793904 106 -60 340 158 36 77 41 1.24
TBRC00109 1416596 793883 106 -60 345 180 56 80 24 1.41
TBRC00111 1416586 793791 104 -61 161 114 75 79 4 7.74
TBRC00112 1416634 793791 110 -60 342 182 12 45 33 1.45
TBRC00112 50 71 21 1.66
TBRC00113 1416665 793869 106 -60 342 116 4 23 19 1.78
TBRC00116 1416659 793815 111 -60 160 96 1 95 94 2.97
TBRC00117 1416615 793780 107 -61 160 114 10 30 20 2.6
Notes to Accompany Table:
• Grid coordinates are WGS84 Zone 29 North
• RC intervals are sampled every 1m by dry riffle splitting or
scoop to provide a 1-3kg sample
• Diamond core are sampled every 1m by cutting the core in half to
provide a 2-4kg sample
• Cut-off grade for reporting of intercepts is >0.5g/t Au with
a maximum of 3m consecutive internal dilution included within the intercept;
only intercepts >=3m and >25 gram x metres are reported
• Samples are analysed for gold by 30g fire assay fusion with AAS
instrument finish; over-range results are reanalysed by 30g fire assay fusion
with gravimetric finish
Tomboronkoto
Section 1 Sampling Techniques and Data
CRITERIA JORC CODE EXPLANATION COMMENTARY
Sampling techniques Sampling has been by diamond drill coring and reverse circulation chip.
· Nature and quality of sampling (e.g. cut channels, random chips, or Diamond core has been geologically logged and sampled to geological contacts
specific specialised industry standard measurement tools appropriate to the with nominal sample lengths between 0.3m and 4.5m (most commonly 1m). Core
minerals under investigation, such as down hole gamma sondes, or handheld XRF selected for assay is systematically cut lengthwise into half core by diamond
instruments, etc.). These examples should not be taken as limiting the broad blade rock saw, numbered and bagged before dispatch to the laboratory for
meaning of sampling. analysis.
· Include reference to measures taken to ensure sample representivity All core is photographed, wet and dry.
and the appropriate calibration of any measurement tools or systems used.
Reverse circulation chips are geologically logged and sampled on regular
· Aspects of the determination of mineralisation that are Material to lengths of 1m. Chip material selected for assay is systematically divided to a
the Public Report. 1/8 proportion using a rotary splitter attached to the cyclone sample recovery
system, numbered and bagged before dispatch to the laboratory for analysis.
· In cases where 'industry standard' work has been done this would be
relatively simple (e.g. 'reverse circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to produce a 30 g charge for fire
assay'). In other cases more explanation may be required, such as where there
is coarse gold that has inherent sampling problems. Unusual commodities or
mineralisation types (e.g. submarine nodules) may warrant disclosure of
detailed information.
Drilling techniques Diamond core drilling with standard inner tubes. NTW diameter (57.1 mm) to
target depth where possible with some smaller NQ2 intervals as tails. Core is
· Drill type (e.g. core, reverse circulation, open-hole hammer, marked and oriented.
rotary air blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter,
triple or standard tube, depth of diamond tails, face-sampling bit or other Reverse Circulation drilling with 4" or 4.5" hammer and 4" rod string to
type, whether core is oriented and if so, by what method, etc.). target depth.
Drill sample recovery Diamond core recoveries are measured in the core trays and recorded as
recovered metres and recovered % as part of the geological logging process.
· Method of recording and assessing core and chip sample recoveries
and results assessed. RC recoveries are monitored by chip sample weight recording. Sample weights
have been analysed for cyclicity with no relationship between sample weight
· Measures taken to maximise sample recovery and ensure and depth noted.
representative nature of the samples.
· Whether a relationship exists between sample recovery and grade and
whether sample bias may have occurred due to preferential loss/gain of
fine/coarse material.
Logging Diamond core has been geologically and geotechnically logged to a level of
detail to support appropriate classification and reporting of a Mineral
· Whether core and chip samples have been geologically and Resource.
geotechnically logged to a level of detail to support appropriate Mineral
Resource estimation, mining studies and metallurgical studies. Reverse circulation chip samples have been geologically logged to a level of
detail to support appropriate classification and reporting of a Mineral
· Whether logging is qualitative or quantitative in nature. Core (or Resource.
costean, channel, etc.) photography.
Total length of DD logged is 6,555.5m. Total length of RC logged is 23,218m.
· The total length and percentage of the relevant intersections
logged.
Sub-sampling techniques and sample preparation Historic core has been systematically cut lengthwise into half core with a
diamond saw.
· If core, whether cut or sawn and whether quarter, half or all core
taken. RC samples representing a 1/8 split are taken directly from the rig mounted
cyclone by rotary splitter, sample weight is recorded, sample is bagged in pre
· If non-core, whether riffled, tube sampled, rotary split, etc. and numbered plastic and sample tickets are inserted and bag is sealed for
whether sampled wet or dry. transport to preparation facility.
· For all sample types, the nature, quality and appropriateness of Generally, one of each of the two control samples (blank or CRM standard) is
the sample preparation technique. inserted into the sample stream every tenth sample. Over the 2018 deep diamond
programme. An industry standard, documented process of sample mark-up, core
· Quality control procedures adopted for all sub-sampling stages to splitting, bagging and ticketing and recording is in place at the Mako site.
maximise representivity of samples. The laboratories sample preparation followed a standard documented process
flow with whole sample crushing (better than 70% passing 2mm) followed by a
· Measures taken to ensure that the sampling is representative of the 1kg riffle split for pulverisation to 75 micron (better than 85% pass).
in situ material collected, including for instance results for field
duplicate/second-half sampling. Master pulps of 250g were split and placed in airtight, sealed bags and sent
by courier to the assaying laboratory for analysis.
· Whether sample sizes are appropriate to the grain size of the
material being sampled. Sample size of 2-6kg is appropriate for the grain size of material.
Quality of assay data and laboratory tests Au assays are determined by fire assay with AAS finish. Laboratory and assay
procedures are appropriate for Mineral Resource estimation.
· The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is considered partial or QAQC consisted of standards, blanks and laboratory duplicates (both coarse and
total. pulp). The QAQC sample results showed acceptable levels of accuracy and
precision.
· For geophysical tools, spectrometers, handheld XRF instruments,
etc., the parameters used in determining the analysis including instrument The assay data is considered to be suitable for Mineral Resource estimation.
make and model, reading times, calibrations factors applied and their
derivation, etc.
· Nature of quality control procedures adopted (e.g. standards,
blanks, duplicates, external laboratory checks) and whether acceptable levels
of accuracy (i.e. lack of bias) and precision have been established.
Verification of sampling and assaying All aspects of the core sampling, assay procedures and QA/QC program have been
reviewed and were judged to be suitable for use in the estimation of Mineral
· The verification of significant intersections by either independent Resources.
or alternative company personnel.
Drill hole assay result data has been checked against the original hardcopy
· The use of twinned holes. laboratory assay reports for a representative number of holes.
· Documentation of primary data, data entry procedures, data Below detection limit values (negatives) have been replaced by background
verification, data storage (physical and electronic) protocols. values.
· Discuss any adjustment to assay data. Un-sampled intervals have been retained as un-sampled (null or blank). All of
these intervals occur within the waste domain and have no material impact on
the estimate.
Location of data points Drill holes have been surveyed by Mako Mine staff surveyors using a Leica
GS14, GS15, and GS18 dGPS.
· Accuracy and quality of surveys used to locate drill holes (collar
and down-hole surveys), trenches, mine workings and other locations used in Downhole surveys were undertaken by the drilling contractor using a Reflex
Mineral Resource estimation. DeviGyro tool with a reading taken every 3m downhole.
· Specification of the grid system used. Grid system is based on the UTM28N grid on the WGS84 ellipsoid. Survey heights
are based on PRS097 (with independent checks on AusPos) and are orthometric
· Quality and adequacy of topographic control. (i.e. msl).
A topographic surface with 1m resolution has been generated from a 2022 Lidar
survey of the Tombo area.
Data spacing and distribution Data spacing is Generally 25x25m, with a gap underneath National Highway 7,
which runs across the western portion of the deposit. This spacing is adequate
· Data spacing for reporting of Exploration Results. to determine the geological and grade continuity for reporting of a Mineral
Resources.
· Whether the data spacing and distribution is sufficient to
establish the degree of geological and grade continuity appropriate for the Drill samples were composited to 1m for use in the estimate.
Mineral Resource and Ore Reserve estimation procedure(s) and classifications
applied.
· Whether sample compositing has been applied.
Orientation of data in relation to geological structure Geological structures are interpreted to be steeply-dipping to the
south-southeast. Drilling intersects structures from the north and south
· Whether the orientation of sampling achieves unbiased sampling of sides, generally dipping -60⁰ below horizontal, with azimuths either at
possible structures and the extent to which this is known, considering the approximately 340⁰ or 160⁰. All drilling would ideally be targeted from
deposit type. the south, but the presence of the village of Tomboronkoto largely precludes
this.
· If the relationship between the drilling orientation and the
orientation of key mineralised structures is considered to have introduced a Drilling primarily targeted the granodiorite unit which contained the most
sampling bias, this should be assessed and reported if material. significant mineralisation and dipped at about 70⁰ to the south-southeast.
The drilling orientation is adequate for a non-biased assessment of the
orebody with respect to interpreted structures and interpreted controls on
mineralisation.
Sample security Labelling and submission of samples complies with industry standard.
· The measures taken to ensure sample security.
Audits or reviews An independent audit of the sample preparation laboratory has been undertaken
in 2018 (Fis, 2018) found no material issues with the sampling methods or
· The results of any audits or reviews of sampling techniques and data.
data.
The competent person audited the sample preparation laboratory in 2024. No
material issues were found.
Section 2 Reporting of Exploration Results
CRITERIA JORC CODE EXPLANATION COMMENTARY
Mineral tenement and land tenure status The Tomboronkoto Permit is held by Ardimines SARL. Toro Gold Limited is in
a joint Venture with Ardimines with Toro being the manager and sole funder of
· Type, reference name/number, location and ownership including the joint Venture. Toro Gold Limited is a company controlled by resolute
agreements or material issues with third parties such as joint ventures, Limited. The permit is in good standing.
partnerships, overriding royalties, native title interests, historical sites,
wilderness or national park and environmental settings.
· The security of the tenure held at the time of reporting along with
any known impediments to obtaining a licence to operate in the area.
Exploration done by other parties Past exploration has been performed by Ashanti Gold and Randgold Resources on
a previously held Research Permit which was relinquished prior to being held
· Acknowledgment and appraisal of exploration by other parties. by Ardimines SARL. Randgold had undertaken soil geochemistry, surface
mapping and drilling on the entire Research Permit. Regional auger drilling
identified gold anomalism which Ashanti Gold followed up with Diamond and
Reverse Circulation drilling and trenching on the Tomboronkoto prospect.
Subsequently Randgold undertook further DD drilling and trenching.
Geology Mineralisation is currently interpreted to be within a shear in the
granodiorite unit. Intensity of gold mineralisation appears to correlate with
· Deposit type, geological setting and style of mineralisation. the intensity of pyrite development and exhibits good lateral and vertical
continuity through the mineralised zone.
Mineralisation has a relatively simple geometry comprising a zone that varies
from 30 to 60m in width, along the 1,700m strike length drilled to date. The
zone dips approximately 70⁰ to the south-southeast.
Drill hole Information Easting, Northing and RL of the drill hole collars are based on the UTM28N
grid on the WGS84 ellipsoid. Survey heights are based on PRS097 (with
· A summary of all information material to the understanding of the independent checks on AusPos) and are orthometric (i.e. msl).
exploration results including a tabulation of the following information for
all Material drill holes: The MRE has used drill hole collar RL derived from the topographical surface.
o easting and northing of the drill hole collar Dip is the inclination of the hole from the horizontal. For example, a
vertically down drilled hole from the surface is -90°. Azimuth is reported in
o elevation or RL (Reduced Level - elevation above sea level in metres) of degrees as the grid direction toward which the hole is drilled.
the drill hole collar
Down hole length of the hole is the distance from the surface to the end of
o dip and azimuth of the hole the hole, as measured along the drill trace. Intersection depth is the
distance down the hole as measured along the drill trace. Intersection width
o down hole length and interception depth is the downhole distance of an intersection as measured along the drill trace.
o Whole length. Drill hole length is the distance from the surface to the end of the hole, as
measured along the drill trace.
· If the exclusion of this information is justified on the basis that
the information is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly explain why
this is
the case.
Data aggregation methods Drillholes have been composited to 1m intervals using Leapfrog Geo 2023.2.1
with residual lengths distributed evenly across all composites within the
· In reporting Exploration Results, weighting averaging techniques, domain. There are no residual samples.
maximum and/or minimum grade truncations (e.g. cutting of high grades) and
cut-off grades are usually Material and should be stated. The influence of extreme gold assays has been limited by top-cutting assays
across all domains. Top-cuts have been determined using a combination of log
· Where aggregate intercepts incorporate short lengths of high grade probability, log histogram, and mean variance plots. Top-cuts have been
results and longer lengths of low grade results, the procedure used for such reviewed and applied to the composites on a domain-by-domain basis.
aggregation should be stated and some typical examples of such aggregations
should be shown in detail. The assay intervals are reported as down hole length as the true width
variable is not known.
· The assumptions used for any reporting of metal equivalent values
should be clearly stated. Gold assays are rounded to two decimal places.
No metal equivalent reporting is used or applied.
Relationship between mineralisation widths and intercept lengths The intersection width is measured down the hole trace and may not be the true
width.
· These relationships are particularly important in the reporting of
Exploration Results. All drill results are downhole intervals only due to the variable orientation
of the mineralisation.
· If the geometry of the mineralisation with respect to the drill
hole angle is known, its nature should be reported.
· If it is not known and only the down hole lengths are reported,
there should be a clear statement to this effect (e.g. 'down hole length, true
width not known').
Diagrams A plan view is contained within this document. New cross-sectional
interpretations are included.
· Appropriate maps and sections (with scales) and tabulations of
intercepts should be included for any significant discovery being reported
These should include, but not be limited to a plan view of drill hole collar
locations and appropriate sectional views.
Balanced reporting Diamond and RC drill holes forming the basis of the Mineral Resource estimate
have been reported previously. Additional drilling has informed the 2024
· Where comprehensive reporting of all Exploration Results is not estimate.
practicable, representative reporting of both low and high grades and/or
widths should be practiced to avoid misleading reporting of Exploration
Results.
Other substantive exploration data No other exploration data is considered meaningful and material to this
document.
· Other exploration data, if meaningful and material, should be
reported including (but not limited to): geological observations; geophysical
survey results; geochemical survey results; bulk samples - size and method of
treatment; metallurgical test results; bulk density, groundwater, geotechnical
and rock characteristics; potential deleterious or contaminating substances.
Further work Future exploration may involve the drilling of more drillholes, both diamond
core and reverse circulation, to further extend the mineralised zones and to
· The nature and scale of planned further work (e.g. tests for collect additional detailed data on known mineralized zones. Geophysical
lateral extensions or depth extensions or large-scale step-out drilling). exploration is also planned as part of the future exploration of the permit.
· Diagrams clearly highlighting the areas of possible extensions,
including the main geological interpretations and future drilling areas,
provided this information is not commercially sensitive.
Section 3 Estimation and Reporting of Mineral Resources
CRITERIA JORC CODE EXPLANATION COMMENTARY
Database Data has been compiled into a relational SQL database; the setup of this
integrity
database precludes the loading of data which do not meet the required
· Measures taken to ensure that data has not been corrupted by, for validation protocols. The data is managed using DataShed© drill hole
example, transcription or keying errors, between its initial collection and management software using SQL database techniques. Validation checks are
its use for Mineral Resource estimation purposes. conducted using SQL and DataShed© relational database standards. Data has
also been checked against original hard copies for 100% of the data, and where
· Data validation procedures used. possible, loaded from original data sources.
Resolute completed the following basic validation checks on the data supplied
prior to resource estimation:
· Drill holes with overlapping sample intervals.
· Sample intervals with no assay data or duplicate records.
· Assay grade ranges.
· Collar coordinate ranges.
· Valid hole orientation data.
There are no significant issues identified with the data.
Site visits Mr Patrick Smillie, a full time employee of Resolute Mining Limited and a
Member of the Society for Mining, Metallurgy, and Exploration is the Competent
· Comment on any site visits undertaken by the Competent Person and the Person, who visited site in June, 2024.
outcome of those visits.
· If no site visits have been undertaken indicate why this
is the case.
Geological interpretation The digital database used for the interpretation included logged intervals for
the key granodiorite unit. There is a moderate level of confidence in the
· Confidence in (or conversely, the uncertainty of) the geological interpretation of the mineralised shear zoneprimarily due to the relatively
interpretation of the mineral deposit. wide-spaced drilling. Additionally Resolute's drilling program was entirely
RC, though historic core has been reviewed and logged.
· Nature of the data used and of any assumptions made.
The mineralised volume has been constructed using nested Leapfrog Indicator
· The effect, if any, of alternative interpretations on Mineral wireframes at lower cut-offs of 0.2 g/t Au and 0.75 g/t Au. The overall
Resource estimation. shape of the mineralised unit has been guided by a sectional interpretation of
the trend of mineralisation within the mineralised shear.
· The use of geology in guiding and controlling Mineral Resource
estimation. The factors affecting continuity both of grade and geology are most likely to
be associated with structural controls and local complexity, the knowledge of
· The factors affecting continuity both of grade and geology. which is limited with the current spacing of information. The broad approach
to the mineralisation modelling is an attempt to model an unbiased
interpretation.
Dimensions Gold mineralisation varies from approximately 10 to 50m in thickness along the
approximately 750m strike length of defined mineralisation. Mineralisation
· The extent and variability of the Mineral Resource expressed as dips at approximately 70⁰ to the SSE and is defined to approximately 150m
length (along strike or otherwise), plan width, and depth below surface to the vertical depth. The deposit remains open at depth and to the west.
upper and lower limits of the Mineral Resource.
Estimation and modelling techniques Estimation of gold grade has been completed using Ordinary Kriging (OK).
Mineralisation has been constrained using wireframes constructed using nested
· The nature and appropriateness of the estimation technique(s) applied Leapfrog Indicator wireframes constructed within the host granodiorite unit.
and key assumptions, including treatment of extreme grade values, domaining, These wireframes have been used to define domain codes for estimation.
interpolation parameters and maximum distance of extrapolation from data Drillholes have been flagged with the domain code and composited using the
points. If a computer assisted estimation method was chosen include a domain code to segregate the data.
description of computer software and parameters used.
Domain boundary analysis has been undertaken with hard boundaries used for all
domains.
Drillholes have been composited to 1m intervals using Leapfrog Geo 2023.2.1
with residual lengths distributed evenly across all composites within the
domain. There are no residual samples.
· The availability of check estimates, previous estimates and/or mine The influence of extreme gold assays has been limited by top-cutting assays
production records and whether the Mineral Resource estimate takes appropriate across all domains. Top-cuts have been determined using a combination of log
account of such data. probability, log histogram, and mean variance plots. Top-cuts have been
reviewed and applied to the composites on a domain-by-domain basis.
· The assumptions made regarding recovery of by- products.
Variography has been undertaken on a domain-by-domain basis in Datamine
· Estimation of deleterious elements or other non-grade variables of Supervisor v.8.14.3.3 using top-cut values.
economic significance (e.g. sulphur for acid mine drainage characterization).
Drillhole data spacing is 25m x 25m across the deposit, with a small gap of
· In the case of block model interpolation, the block size in relation 50x50m spaced data under National Highway 7 which runs across the western
to the average sample spacing and the search employed. portion of the deposit.
· In the case of block model interpolation, the block size in relation The block model parent block size is 10m (X) by 10m (Y) by 5m (Z) with up to
to the average sample spacing and the search employed. 16 sub-blocks per parent block in the X and Y directions, and up to 8
sub-blocks per parent block in the Z direction. Sub-blocks have been estimated
· Any assumptions behind modelling of selective mining units. at the parent block scale. Block size is considered appropriate for the
drillhole spacing throughout the deposit.
· Any assumptions about correlation between variables.
Grade estimation has been completed in three passes:
· Description of how the geological interpretation was used to control
the resource estimates. Ø Pass 1 estimation has been undertaken using a minimum of 4 and maximum of
25 sample composites (determined using Datamine Supervisor v.8.14 KNA tool)
· Discussion of basis for using or not using grade cutting or capping. into a search ellipsoid with dimensions equal to half the variogram range of
the domain.
· The process of validation, the checking process used, the comparison
of model data to drill hole data, and use of reconciliation data if available. Ø Pass 2 estimation has been undertaken with the same minimum/maximum
samples as Pass 1 into a search ellipsoid twice the first pass.
Ø Pass 3 estimation has been undertaken with a minimum of 2 samples, and
the same maximum number of samples as the first two passes into a search
ellipsoid twice the second pass
Ø A maximum of three samples per drillhole has been used in the first two
passes, with no limits set on the third pass..
The mineral resource estimate has been validated using visual validation
tools, mean grade comparisons between the block model and declustered
composite grade means, and swath plots comparing the input composite grades
and the estimated block model grades by Northing, Easting, and RL.
Leapfrog Geo v2023.2.1 and Datamine Supervisor v8.14.3.3 software have been
used for estimation.
No by-product recoveries were considered.
Moisture Moisture was not considered in the density assignment.
· Whether the tonnages are estimated on a dry basis or with natural
moisture, and the method of determination of the moisture content.
Cut-off parameters A nominal lower cut-off grade of 0.2g/t Au was used to define the mineralised
domains to encompass the complete mineralised distribution and produce a model
· The basis of the adopted cut-off grade(s) or quality that reduces the risk of conditional bias that could be introduced where the
parameters applied. constraining interpretation and data selection is based on a significantly
higher grade than the natural geological grade
cut-off.
The cut-off grade for reporting (above 0.5g/t Au and above 1.0 g/t Au) was
used in line with the previous resource reporting at the nearby Mako deposit
Mining factors or assumptions The shallow occurrence of the mineralisation indicates that open pit mining is
appropriate, in line with other deposits in the area.
· Assumptions made regarding possible mining methods, minimum mining
dimensions and internal (or, if applicable, external) mining dilution. The estimation methodology used results in an amount of edge dilution being
incorporated into the blocks of the model. No account of mining loss has been
It is always necessary as part of the process of determining reasonable incorporated.
prospects for eventual economic extraction to consider potential mining
methods, but the assumptions made regarding mining methods and parameters when
estimating Mineral Resources may not always be rigorous. Where this is the
case, this should be reported with an explanation of the basis of the mining
assumptions made.
Metallurgical factors or assumptions No specific assumptions were made regarding metallurgical factors for this
estimate.
· The basis for assumptions or predictions regarding metallurgical
amenability. It is always necessary as part of the process of determining Metallurgy is assumed to be similar to the nearby Mako deposit.
reasonable prospects for eventual economic extraction to consider potential
metallurgical methods, but the assumptions regarding metallurgical treatment
processes and parameters made when reporting Mineral Resources may not always
be rigorous. Where this is the case, this should be reported with an
explanation of the basis of the metallurgical assumptions made.
Environmental factors or assumptions In order for mining to occur, the nearby village of Tomboronkoto would need to
be relocated and a portion of National Highway 7 rerouted.
· Assumptions made regarding possible waste and process residue
disposal options. It is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider the
potential environmental impacts of the mining and processing operation. While
at this stage the determination of potential environmental impacts,
particularly for a green fields project, may not always be well advanced, the
status of early consideration of these potential environmental impacts should
be reported. Where these aspects have not been considered this should be
reported with an explanation of the environmental assumptions made.
Bulk density Specific gravity values for the Tombo Prospect have been measured based on the
Archimedean Principle using the immersion method for individual core samples.
· Whether assumed or determined. If assumed, the basis for the A total of 1,406 density measurements were available for use. This data has
assumptions. If determined, the method used, whether wet or dry, the frequency been used as the basis of the block model bulk density.
of the measurements, the nature, size and representativeness of the samples.
No relationship between density and gold content could be established.
· The bulk density for bulk material must have been measured by methods
that adequately account for void spaces (vugs, porosity, etc), moisture and A default bulk density of 1.74t/m(3) was assigned to oxide rocks.
differences between rock and alteration zones within the deposit.
A default bulk density of 2.31t/m(3) was assigned to transitional rock.
· Discuss assumptions for bulk density estimates used in the evaluation
process of the different materials. A default bulk density of 2.71t/m(3) was assigned to fresh rock.
Classification The classification is based on the confidence in the continuity of geology and
mineralisation and quality/confidence in the estimation and quality of assay
· The basis for the classification of the Mineral Resources into data and bulk density data.
varying confidence categories.
The Indicated portion of the Resource was defined within a wireframe
· Whether appropriate account has been taken of all relevant factors constructed around areas populated in the first two estimation passes, where
(i.e. relative confidence in tonnage/grade estimations, reliability of input drilling density is less than or equal to 25x25m, and Kriging efficiency is
data, confidence in continuity of geology generally >= 0.6.
and metal values, quality, quantity and distribution of the data).
Mineralisation not classified as Indicated has been classified as Inferred.
· Whether the result appropriately reflects the Competent Person's view
of the deposit. The Mineral Resource estimate appropriately reflects the Competent Person's
view of the deposit.
Audits or reviews No external reviews have been completed.
· The results of any audits or reviews of Mineral
· Resource estimates.
Discussion of relative accuracy/ confidence The Mineral Resource Estimate has been classified based on the quality of the
data collected, the density of the data, the confidence of the geologic and
· Where appropriate a statement of the relative accuracy and confidence mineralisation models, and the grade estimation quality. No relative
level in the Mineral Resource estimate using an approach or procedure deemed statistical or geostatistical confidence or risk measure has been applied.
appropriate by the Competent Person. For example, the application of
statistical or geostatistical procedures to quantify the relative accuracy of The relative accuracy of the Mineral Resource Estimate is reflected in the
the resource within stated confidence limits, or, if such an approach is not reporting of Indicated and Inferred resource categories as defined by the JORC
deemed appropriate, a qualitative discussion of the factors that could affect 2012 code guidelines.
the relative accuracy and confidence of the estimate.
No production data is available for comparison.
· The statement should specify whether it relates to global or local
estimates, and, if local, state the relevant tonnages, which should be
relevant to technical and economic evaluation. Documentation should include
assumptions made and the procedures used.
· These statements of relative accuracy and confidence of the estimate
should be compared with production data, where available.
Mansala
Section 1 Sampling Techniques and Data
CRITERIA JORC CODE EXPLANATION COMMENTARY
Sampling techniques Sampling has been by diamond drill coring and reverse circulation chip.
· Nature and quality of sampling (e.g. cut channels, random chips, or Diamond core has been geologically logged to geological contacts and sampled
specific specialised industry standard measurement tools appropriate to the at 1m intervals. Core selected for assay is systematically cut lengthwise into
minerals under investigation, such as down hole gamma sondes, or handheld XRF half core by diamond blade rock saw, numbered and bagged before dispatch to
instruments, etc.). These examples should not be taken as limiting the broad the laboratory for analysis.
meaning of sampling.
All core is photographed, wet and dry.
· Include reference to measures taken to ensure sample representivity
and the appropriate calibration of any measurement tools or systems used. Reverse circulation chips are geologically logged and sampled on regular
lengths of 1m. Chip material selected for assay is systematically divided to a
· Aspects of the determination of mineralisation that are Material to 1/8 proportion using a riffle splitter after the sample is recovered from the
the Public Report. cyclone. Samples are numbered and bagged before dispatch to the laboratory for
analysis.
· In cases where 'industry standard' work has been done this would be
relatively simple (e.g. 'reverse circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to produce a 30 g charge for fire
assay'). In other cases more explanation may be required, such as where there
is coarse gold that has inherent sampling problems. Unusual commodities or
mineralisation types (e.g. submarine nodules) may warrant disclosure of
detailed information.
Drilling techniques Diamond core drilling with standard inner tubes. NTW diameter (57.1 mm) to
target depth where possible with some smaller NQ2 intervals as tails. Core is
· Drill type (e.g. core, reverse circulation, open-hole hammer, marked and oriented.
rotary air blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter,
triple or standard tube, depth of diamond tails, face-sampling bit or other Reverse Circulation drilling with 4" or 4.5" hammer and 4" rod string to
type, whether core is oriented and if so, by what method, etc.). target depth.
Drill sample recovery Diamond core recoveries are measured in the core trays and recorded as
recovered metres and recovered % as part of the geological logging process.
· Method of recording and assessing core and chip sample recoveries
and results assessed. RC recoveries are monitored by chip sample weight recording. Sample weights
have been analysed for cyclicity with no relationship between sample weight
· Measures taken to maximise sample recovery and ensure and depth noted.
representative nature of the samples.
· Whether a relationship exists between sample recovery and grade and
whether sample bias may have occurred due to preferential loss/gain of
fine/coarse material.
Logging Diamond core has been geologically and geotechnically logged to a level of
detail to support appropriate classification and reporting of a Mineral
· Whether core and chip samples have been geologically and Resource.
geotechnically logged to a level of detail to support appropriate Mineral
Resource estimation, mining studies and metallurgical studies. Reverse circulation chip samples have been geologically logged to a level of
detail to support appropriate classification and reporting of a Mineral
· Whether logging is qualitative or quantitative in nature. Core (or Resource.
costean, channel, etc.) photography.
Total length of DD logged is 2,211m. Total length of RC logged is 11,343m.
· The total length and percentage of the relevant intersections
logged.
Sub-sampling techniques and sample preparation Core has been systematically cut lengthwise into half core with a diamond saw.
· If core, whether cut or sawn and whether quarter, half or all core The main RC sample is recovered from the cyclone, with a 1/8 sample taken with
taken. a riffle splitter after weighing. Sub-sample weight is recorded, sample is
bagged in pre numbered plastic and sample tickets are inserted and bag is
· If non-core, whether riffled, tube sampled, rotary split, etc. and sealed for transport to preparation facility.
whether sampled wet or dry.
Blanks or certified reference material are inserted one in twenty samples. An
· For all sample types, the nature, quality and appropriateness of industry standard, documented process of sample mark-up, core splitting,
the sample preparation technique. bagging and ticketing and recording is in place. The laboratories sample
preparation followed a standard documented process flow with whole sample
· Quality control procedures adopted for all sub-sampling stages to crushing (better than 70% passing 2mm) followed by a 1kg riffle split for
maximise representivity of samples. pulverisation to 75 micron (better than 85% pass).
· Measures taken to ensure that the sampling is representative of the Master pulps of 250g were split and placed in airtight, sealed bags and sent
in situ material collected, including for instance results for field by courier to the assaying laboratory for analysis.
duplicate/second-half sampling.
Sample size of 2-6kg is appropriate for the grain size of material.
· Whether sample sizes are appropriate to the grain size of the
material being sampled.
Quality of assay data and laboratory tests Au assays are determined by fire assay with AAS finish. Laboratory and assay
procedures are appropriate for Mineral Resource estimation.
· The nature, quality and appropriateness of the assaying and
laboratory procedures used and whether the technique is considered partial or QAQC consisted of standards, blanks and laboratory duplicates (both coarse and
total. pulp). The QAQC sample results showed acceptable levels of accuracy and
precision.
· For geophysical tools, spectrometers, handheld XRF instruments,
etc., the parameters used in determining the analysis including instrument The assay data is considered to be suitable for Mineral Resource estimation.
make and model, reading times, calibrations factors applied and their
derivation, etc.
· Nature of quality control procedures adopted (e.g. standards,
blanks, duplicates, external laboratory checks) and whether acceptable levels
of accuracy (i.e. lack of bias) and precision have been established.
Verification of sampling and assaying All aspects of the core sampling, assay procedures and QA/QC program have been
reviewed and were judged to be suitable for use in the estimation of Mineral
· The verification of significant intersections by either independent Resources.
or alternative company personnel.
Drill hole assay result data has been checked against the original hardcopy
· The use of twinned holes. laboratory assay reports for a representative number of holes.
· Documentation of primary data, data entry procedures, data Below detection limit values (negatives) have been replaced with half of
verification, data storage (physical and electronic) protocols. detection limit.
· Discuss any adjustment to assay data. No intervals have been left unsampled.
Location of data points Drillholes have been surveyed by a contract differential GPS (dGPS) surveyor
to +/-3cm accuracy.
· Accuracy and quality of surveys used to locate drill holes (collar
and down-hole surveys), trenches, mine workings and other locations used in Downhole surveys have been completed with a vairiety of different tools,
Mineral Resource estimation. single-shot, multi-shot, and north-seeking gyro tools have been used at
intervals ranging from 10 to 30m downhole.
· Specification of the grid system used.
Grid system is based on the UTM28N grid on the WGS84 ellipsoid. Survey heights
· Quality and adequacy of topographic control. are based on PRS097 (with independent checks on AusPos) and are orthometric
(i.e. msl).
A topographic surface with approximately 1m resolution has been constructed
using regional 5m contours refined with dGPS survey lines collected during a
2023 IP survey as well as dGPS collar positions.
Data spacing and distribution Data spacing is a reasonably consistent 40m (X) by 100m (Y) across the
deposit. This spacing is adequate to determine the geological and grade
· Data spacing for reporting of Exploration Results. continuity for reporting of an Inferred Mineral Resources.
· Whether the data spacing and distribution is sufficient to Drill samples were composited to 1m for use in the estimate with residual
establish the degree of geological and grade continuity appropriate for the lengths equally distributed across previous intervals..
Mineral Resource and Ore Reserve estimation procedure(s) and classifications
applied.
· Whether sample compositing has been applied.
Orientation of data in relation to geological structure Geological structures are interpreted to be dipping near vertically and
trending north-northeast/south-soutwest. Drilling intersects structures from
· Whether the orientation of sampling achieves unbiased sampling of the east side, generally dipping -85⁰ below horizontal, with azimuths at
possible structures and the extent to which this is known, considering the approximately 10⁰ .
deposit type.
Drilling primarily targeted the sedimentary unit which contained the most
· If the relationship between the drilling orientation and the significant mineralisation and dipped at about 85⁰ to the south. The
orientation of key mineralised structures is considered to have introduced a drilling orientation is adequate for a non-biased assessment of the orebody
sampling bias, this should be assessed and reported if material. with respect to interpreted structures and interpreted controls on
mineralisation.
Sample security Labelling and submission of samples complies with industry standard.
· The measures taken to ensure sample security.
Audits or reviews An independent audit of the sample preparation laboratory has been undertaken
in 2018 (Fis, 2018) found no material issues with the sampling methods or
· The results of any audits or reviews of sampling techniques and data.
data.
Section 2 Reporting of Exploration Results
CRITERIA JORC CODE EXPLANATION COMMENTARY
Mineral tenement and land tenure status To date no exploration results have been reported on an exploration permit,
owned 100% by Resolute.
· Type, reference name/number, location and ownership including
agreements or material issues with third parties such as joint ventures, The permit is currently under renewal.
partnerships, overriding royalties, native title interests, historical sites,
wilderness or national park and environmental settings.
· The security of the tenure held at the time of reporting along with
any known impediments to obtaining a licence to operate in the area.
Exploration done by other parties No exploration was undertaken on the Mansala prospect prior to Resolute's
acquisition of the property.
· Acknowledgment and appraisal of exploration by other parties.
Geology Mineralisation is currently interpreted to be steeply dipping within the
sedimentary unit. Intensity of gold mineralisation appears to correlate with
· Deposit type, geological setting and style of mineralisation. the intensity of arsenopyrite and quartz vein development and exhibits good
lateral and vertical continuity through the mineralised zone.
Mineralisation has a relatively simple geometry comprising a zone
approximately 40m in width, along the 1,000m strike length drilled to date.
The zone dips near vertically.
Drill hole Information Easting, Northing and RL of the drill hole collars are based on the UTM28N
grid on the WGS84 ellipsoid. Survey heights are based on PRS097 and are
· A summary of all information material to the understanding of the orthometric (i.e. msl).
exploration results including a tabulation of the following information for
all Material drill holes: Dip is the inclination of the hole from the horizontal. For example, a
vertically down drilled hole from the surface is -90°. Azimuth is reported in
o easting and northing of the drill hole collar degrees as the grid direction toward which the hole is drilled.
o elevation or RL (Reduced Level - elevation above sea level in metres) of Down hole length of the hole is the distance from the surface to the end of
the drill hole collar the hole, as measured along the drill trace. Intersection depth is the
distance down the hole as measured along the drill trace. Intersection width
o dip and azimuth of the hole is the downhole distance of an intersection as measured along the drill trace.
o down hole length and interception depth Drill hole length is the distance from the surface to the end of the hole, as
measured along the drill trace.
o Whole length.
· If the exclusion of this information is justified on the basis that
the information is not Material and this exclusion does not detract from the
understanding of the report, the Competent Person should clearly explain why
this is
the case.
Data aggregation methods Drillholes have been composited to 1m intervals using Leapfrog Geo 2023.2.3
with residual lengths distributed evenly across all composites within the
· In reporting Exploration Results, weighting averaging techniques, domain. There are no residual samples.
maximum and/or minimum grade truncations (e.g. cutting of high grades) and
cut-off grades are usually Material and should be stated. The influence of extreme gold assays has been limited by top-cutting assays
across all domains. Top-cuts have been determined using a combination of log
· Where aggregate intercepts incorporate short lengths of high grade probability, log histogram, and mean variance plots. Top-cuts have been
results and longer lengths of low grade results, the procedure used for such reviewed and applied to the composites on a domain-by-domain basis.
aggregation should be stated and some typical examples of such aggregations
should be shown in detail. The assay intervals are reported as down hole length as the true width
variable is not known.
· The assumptions used for any reporting of metal equivalent values
should be clearly stated. Gold assays are rounded to two decimal places.
No metal equivalent reporting is used or applied.
Relationship between mineralisation widths and intercept lengths The intersection width is measured down the hole trace and may not be the true
width.
· These relationships are particularly important in the reporting of
Exploration Results. All drill results are downhole intervals only due to the variable orientation
of the mineralisation.
· If the geometry of the mineralisation with respect to the drill
hole angle is known, its nature should be reported.
· If it is not known and only the down hole lengths are reported,
there should be a clear statement to this effect (e.g. 'down hole length, true
width not known').
Diagrams A plan view is contained within this document.
· Appropriate maps and sections (with scales) and tabulations of
intercepts should be included for any significant discovery being reported
These should include, but not be limited to a plan view of drill hole collar
locations and appropriate sectional views.
Balanced reporting Diamond and RC drill holes forming the basis of the Mineral Resource estimate
are reported herein.
· Where comprehensive reporting of all Exploration Results is not
practicable, representative reporting of both low and high grades and/or
widths should be practiced to avoid misleading reporting of Exploration
Results.
Other substantive exploration data No other exploration data is considered meaningful and material to this
document.
· Other exploration data, if meaningful and material, should be
reported including (but not limited to): geological observations; geophysical
survey results; geochemical survey results; bulk samples - size and method of
treatment; metallurgical test results; bulk density, groundwater, geotechnical
and rock characteristics; potential deleterious or contaminating substances.
Further work Future exploration may involve the drilling of more drillholes, both diamond
core and reverse circulation, to further extend the mineralised zones and to
· The nature and scale of planned further work (e.g. tests for collect additional detailed data on known mineralized zones.
lateral extensions or depth extensions or large-scale step-out drilling).
· Diagrams clearly highlighting the areas of possible extensions,
including the main geological interpretations and future drilling areas,
provided this information is not commercially sensitive.
Section 3 Estimation and Reporting of Mineral Resources
CRITERIA JORC CODE EXPLANATION COMMENTARY
Database Data has been compiled into a relational SQL database; the setup of this
integrity
database precludes the loading of data which do not meet the required
· Measures taken to ensure that data has not been corrupted by, for validation protocols. The data is managed using DataShed© drill hole
example, transcription or keying errors, between its initial collection and management software using SQL database techniques. Validation checks are
its use for Mineral Resource estimation purposes. conducted using SQL and DataShed© relational database standards. Data has
also been checked against original hard copies for 100% of the data, and where
· Data validation procedures used. possible, loaded from original data sources.
Resolute completed the following basic validation checks on the data supplied
prior to resource estimation:
· Drill holes with overlapping sample intervals.
· Sample intervals with no assay data or duplicate records.
· Assay grade ranges.
· Collar coordinate ranges.
· Valid hole orientation data.
There are no significant issues identified with the data.
Site visits Mr Patrick Smillie, a full-time employee of Resolute Mining Limited and a
Member of the Society for Mining Metallurgy and Exploration is the Competent
· Comment on any site visits undertaken by the Competent Person and the Person. He visited site in June, 2024.
outcome of those visits.
· If no site visits have been undertaken indicate why this
is the case.
Geological interpretation The digital database used for the interpretation included logged intervals for
the key sedimentary unit. There is a moderate level of confidence in the
· Confidence in (or conversely, the uncertainty of) the geological interpretation of the mineralised shear zone primarily due to the relatively
interpretation of the mineral deposit. wide-spaced drilling.
· Nature of the data used and of any assumptions made. The mineralised volume has been constructed using a Leapfrog Indicator
wireframe at a cut-off of 0.25 g/t Au. The overall shape of the mineralised
· The effect, if any, of alternative interpretations on Mineral unit has been guided by a sectional interpretation based on logged grain size
Resource estimation. and the trend of mineralisation within the mineralised shear.
· The use of geology in guiding and controlling Mineral Resource The factors affecting continuity both of grade and geology are most likely to
estimation. be associated with structural controls and local complexity, the knowledge of
which is limited with the current spacing of information. There appears to be
· The factors affecting continuity both of grade and geology. a direct correlation between grain size, arsenopyrite concentration, and
gold mineralistation. The broad approach to the mineralisation modelling is an
attempt to model an unbiased interpretation.
Dimensions Gold mineralisation varies from several metres to over 20m in thickness along
the approximately 1km strike length currently defined. Mineralisation dips
· The extent and variability of the Mineral Resource expressed as near-vertically, striking at appromsimately 10⁰ and has been defined to
length (along strike or otherwise), plan width, and depth below surface to the approximately 150m vertical depth. The deposit remains open at depth and along
upper and lower limits of the Mineral Resource. strike.
Estimation and modelling techniques Estimation of gold grade has been completed using Ordinary Kriging (OK).
Mineralisation has been constrained using Leapfrog Indicator wireframes
· The nature and appropriateness of the estimation technique(s) applied constructed within the host unit. The wireframe has been used to define domain
and key assumptions, including treatment of extreme grade values, domaining, codes for estimation. Drillholes have been flagged with the domain code and
interpolation parameters and maximum distance of extrapolation from data composited using the domain code to segregate the data.
points. If a computer assisted estimation method was chosen include a
description of computer software and parameters used. Domain boundary analysis has been undertaken with hard boundaries used for all
domains.
Drillholes have been composited to 1m intervals using Leapfrog Geo 2023.2.0
with residual lengths distributed evenly across all composites within the
domain. There are no residual samples.
The influence of extreme gold assays has been limited by top-cutting assays
· The availability of check estimates, previous estimates and/or mine across all domains. Top-cuts have been determined using a combination of log
production records and whether the Mineral Resource estimate takes appropriate probability, log histogram, and mean variance plots. Top-cuts have been
account of such data. reviewed and applied to the composites on a domain-by-domain basis.
· The assumptions made regarding recovery of by- products. Variography has been undertaken on a domain-by-domain basis in Datamine
Supervisor v.8.14.3.3 using top-cut values.
· Estimation of deleterious elements or other non-grade variables of
economic significance (e.g. sulphur for acid mine drainage characterization). Drillhole data spacing ranges from 25m x 25m in densely drilled areas to
approximately 50m x 50m.
· In the case of block model interpolation, the block size in relation
to the average sample spacing and the search employed. The block model parent block size is 25m (X) by 25m (Y) by 5m (Z) with up to
16 sub-blocks per parent block in the X and Y directions, and up to 8
· In the case of block model interpolation, the block size in relation sub-blocks per parent block in the Z direction. Sub-blocks have been estimated
to the average sample spacing and the search employed. at the parent block scale. Block size is considered appropriate for the
drillhole spacing throughout the deposit.
· Any assumptions behind modelling of selective mining units.
Grade estimation has been completed in three passes:
· Any assumptions about correlation between variables.
Ø Pass 1 estimation has been undertaken using a minimum of 4 and maximum of
· Description of how the geological interpretation was used to control 26 sample composites (determined using Datamine Supervisor v.8.14 KNA tool)
the resource estimates. into a search ellipsoid with dimensions equal to half the variogram range of
the domain.
· Discussion of basis for using or not using grade cutting or capping.
Ø Pass 2 estimation has been undertaken with the same minimum/maximum
· The process of validation, the checking process used, the comparison samples as Pass 1 into a search ellipsoid twice the first pass.
of model data to drill hole data, and use of reconciliation data if available.
Ø Pass 3 estimation has been undertaken with the same minimum and maximum
number of samples as the first two passes into a search ellipsoid twice the
second pass
Ø A maximum of four samples per drillhole has been used in the first two
passes, with no limits set on the third pass..
This is the first mineral resource estimate released for the Mansala deposit.
The mineral resource estimate has been validated using visual validation
tools, mean grade comparisons between the block model and declustered
composite grade means, and swath plots comparing the input composite grades
and the estimated block model grades by Northing, Easting, and RL.
Leapfrog Geo v2023.2.3 and Datamine Supervisor v8.14.3.3 software have been
used for estimation.
No by-product recoveries were considered.
Moisture Moisture was not considered in the density assignment.
· Whether the tonnages are estimated on a dry basis or with natural
moisture, and the method of determination of the moisture content.
Cut-off parameters A nominal lower cut-off grade of 0.25g/t Au was used to define the mineralised
domains to encompass the complete mineralised distribution and produce a model
· The basis of the adopted cut-off grade(s) or quality that reduces the risk of conditional bias that could be introduced where the
parameters applied. constraining interpretation and data selection is based on a significantly
higher grade than the natural geological grade
cut-off.
The cut-off grade for reporting is similar to other deposits in the Siguiri
basin.
Mining factors or assumptions The shallow occurrence of the mineralisation indicates that open pit mining is
appropriate, in line with other deposits in the area.
· Assumptions made regarding possible mining methods, minimum mining
dimensions and internal (or, if applicable, external) mining dilution. The estimation methodology used results in an amount of edge dilution being
incorporated into the blocks of the model. No account of mining loss has been
It is always necessary as part of the process of determining reasonable incorporated.
prospects for eventual economic extraction to consider potential mining
methods, but the assumptions made regarding mining methods and parameters when
estimating Mineral Resources may not always be rigorous. Where this is the
case, this should be reported with an explanation of the basis of the mining
assumptions made.
Metallurgical factors or assumptions No specific assumptions were made regarding metallurgical factors for this
estimate. .
· The basis for assumptions or predictions regarding metallurgical
amenability. It is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider potential
metallurgical methods, but the assumptions regarding metallurgical treatment
processes and parameters made when reporting Mineral Resources may not always
be rigorous. Where this is the case, this should be reported with an
explanation of the basis of the metallurgical assumptions made.
Environmental factors or assumptions No assumptions were made regarding environmental restrictions.
· Assumptions made regarding possible waste and process residue
disposal options. It is always necessary as part of the process of determining
reasonable prospects for eventual economic extraction to consider the
potential environmental impacts of the mining and processing operation. While
at this stage the determination of potential environmental impacts,
particularly for a green fields project, may not always be well advanced, the
status of early consideration of these potential environmental impacts should
be reported. Where these aspects have not been considered this should be
reported with an explanation of the environmental assumptions made.
Bulk density Specific gravity values for the Mansala Prospect have been measured based on
the Archimedean Principle using the immersion method for individual core
· Whether assumed or determined. If assumed, the basis for the samples. A total of 713 density measurements were available for use, with the
assumptions. If determined, the method used, whether wet or dry, the frequency vast majority of these being in fresh rock below the saprock and laterite
of the measurements, the nature, size and representativeness of the samples. domains. This data has been used as the basis of the block model bulk density.
· The bulk density for bulk material must have been measured by methods No relationship between density and gold content could be established.
that adequately account for void spaces (vugs, porosity, etc), moisture and
differences between rock and alteration zones within the deposit. A default bulk density of 1.76t/m(3) was assigned to oxide rocks.
· Discuss assumptions for bulk density estimates used in the evaluation A default bulk density of 2.16t/m(3) was assigned to transitional rock.
process of the different materials.
Bulk density has been estimated in the Fresh domain, with a value of .
2.72t/m(3) assigned to unestimated blocks.
Classification The classification is based on the confidence in the continuity of geology and
mineralisation and quality/confidence in the estimation and quality of assay
· The basis for the classification of the Mineral Resources into data and bulk density data. Drillhole spacing does not support classification
varying confidence categories. above Inferred.
· Whether appropriate account has been taken of all relevant factors The Mineral Resource estimate appropriately reflects the Competent Person's
(i.e. relative confidence in tonnage/grade estimations, reliability of input view of the deposit.
data, confidence in continuity of geology
and metal values, quality, quantity and distribution of the data).
· Whether the result appropriately reflects the Competent Person's view
of the deposit.
Audits or reviews No external reviews have been completed.
· The results of any audits or reviews of Mineral
· Resource estimates.
Discussion of relative accuracy/ confidence Although the estimate for gold is considered to be without bias, it is for
some of the estimated volume based on relatively wide spaced data. The
· Where appropriate a statement of the relative accuracy and confidence estimate is therefore of moderate confidence and expected to be of moderate
level in the Mineral Resource estimate using an approach or procedure deemed relative accuracy at the local scale when drilling density exceeds 50m x 50m.
appropriate by the Competent Person. For example, the application of Infill drilling will be required to improve the confidence of the local
statistical or geostatistical procedures to quantify the relative accuracy of estimate.
the resource within stated confidence limits, or, if such an approach is not
deemed appropriate, a qualitative discussion of the factors that could affect
the relative accuracy and confidence of the estimate.
· The statement should specify whether it relates to global or local
estimates, and, if local, state the relevant tonnages, which should be
relevant to technical and economic evaluation. Documentation should include
assumptions made and the procedures used.
· These statements of relative accuracy and confidence of the estimate
should be compared with production data, where available.
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