REG - Greatland Gold PLC - Nickel prospectivity confirmed at Panorama
30/11/2023 07:15
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RNS Number : 1976V Greatland Gold PLC 30 November 2023
Greatland Gold plc (AIM: GGP)
E: info@greatlandgold.com
W: https://greatlandgold.com
: twitter.com/greatlandgold
NEWS RELEASE | 30 November 2023
Nickel prospectivity confirmed in soil sampling at Panorama
800 metre coherent nickel strike defined in favourable geology
THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION AS STIPULATED UNDER THE UK
MARKET ABUSE REGULATIONS. ON PUBLICATION OF THIS ANNOUNCEMENT VIA A
REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO BE IN THE
PUBLIC DOMAIN.
Greatland Gold plc (AIM:GGP) (Greatland or the Company) is pleased to announce
the results of surface sampling across its Panorama East, Panorama and
Panorama North tenure. The Panorama project is located approximately 200km
south east of Port Hedland in the Pilbara region of Western Australia, and is
considered prospective for Archean gold and nickel. The combined soil and rock
chip sampling program was designed to follow up along strike of previous
surface sample results and to test conductors identified in an airborne
electromagnetic survey.
Highlights
§ Surface sampling program was undertaken with results including 27 soil
samples from the Ni_04 prospect returning above 0.1% nickel over a 1.4km
strike extent, and a peak result of 0.3% nickel in a rock chip sample.
§ Nickel strike includes 800 metre coherent +0.18% nickel anomaly.
§ These nickel results sit within the Dalton Suite ultramafics, which is
confirmed as nickel enriched and a potential primary nickel sulphide host.
§ Several untested highly prospective conductors sit within the 14km of
unsampled Dalton Suite.
Greatland Managing Director, Shaun Day, commented:
"Our recent surface sampling at Panorama has delivered a strongly positive
result for nickel prospectivity.
The large extent of the prospective Dalton Suite ultramafics within our
tenure, and the existence of coincident untested conductors, gives us
confidence in the potential for a substantial nickel discovery at Panorama.
We are now planning our next steps to effectively test both the geochemical
and geophysical anomalies on the tenure."
Overview of the Panorama project
Greatland's Panorama project comprises three tenements (~157 km(2)) located
approximately 200km south east of Port Hedland in the Pilbara Craton of
Western Australia. (Figure 1).
Table 1: Greatland Panorama tenure
Tenement Name Date Granted Size (sub blocks) Size (km2)
E45/4936 Panorama Nth 8/02/2018 11 35
E46/1166 Panorama 2/11/2018 30 96
E46/1170 Panorama East 19/10/2018 8 26
The geology of the area is predominantly greenstone and granite of the Archean
Pilbara Craton in northern Western Australia. Coarse grained Archean
volcano-sedimentary rocks ("greenstones") strike over 7km from north to south
throughout the Panorama project area. The greenstones form the "Coongan
Syncline" and lie between the Shaw batholith to the west and the Coongan
batholith to the north east.
Importantly the sequence is intruded by ultramafic rocks of the Dalton Suite
(illustrated in purple in Figure 2). These units are considered prospective
for primary nickel sulphide deposits.
Figure 1: Panorama project location
Previous work
Limited soil sampling (489 samples) completed by Greatland over the tenure
previously in 2019 identified the Dalton Suite as anomalous for nickel.
A detailed aeromagnetic survey assisted in mapping out the extents of the
Dalton Suite and a follow up airborne electromagnetic survey highlighted 28
conductors, 12 of which are located within the Dalton Suite and may correlate
to massive sulphides.
No drilling has been undertaken across the tenements.
Surface Sampling Program
Eight soil grids (refer Table 2 and Figure 2) were designed so that a sample
was taken every 50m on lines generally 200m apart at each prospect to test
predominantly the nickel and gold prospectivity across the tenure, with a
focus on conductors within the Dalton Suite.
A total of 832 soil samples were taken.
Opportunistic rock chips were taken where favourable outcrop was identified.
In total, 74 rock chips were taken with an estimated weight of 2kg each.
All samples were sent to Intertek laboratory in Perth for multi-element
analysis.
Table 2: soil grid completion status
Tenement Prospect Number of samples Status
Panorama East (E 46/1170) Ni_02 72/72 Complete
Ni_03 125/125 Complete
Ni_04 173/180 Complete
Panorama Zn_01 182/182 Complete
(E 46/1166)
Au_03 169/169 Complete
Panorama North (E 45/4936) Au_02 94/148 Partial completion
Ni_01 0/85 Not completed
Au_01 0/107
All Rock Chips 74 Targeted rock chip sampling across all tenements ongoing
Assay Results
Results returned for the recent program displayed a peak of 0.3% nickel in a
rock chip from the Ni_04 prospect within the Dalton Suite (Figure 3). The
Ni_04 prospect returned a total of 27 soil samples above 0.1% nickel over a
1.4km strike, within which a coherent core nickel anomaly of ~800m strike at
> 0.18% nickel was outlined.
A further four soil samples in the Ni_02 prospect reported above 0.1% nickel.
Three surface samples returned gold results above 100ppb, all within the Ni_03
prospect. The peak assay was 142ppb gold. No coherent anomaly was detected.
Discussion
The nickel anomaly identified on the NI_04 prospect strongly increases the
prospectivity of the Dalton Suite ultramafics within the tenure.
Primary nickel sulphide deposits such as Radio Hill (Figure 1) located 50km
south of Karratha within the Pilbara craton and 350km west of Panorama, are
formed during the emplacement of the host mantle derived ultramafic rocks into
the crust. The (nickel) sulphides accumulate in structural depressions along
the basal contact and in feeder conduits (Hoatson et al. 2006) as they are
insoluble in the melt and have high density. These accumulations can be
identified as short strike length conductors with electromagnetic surveys.
These latest results confirm the Dalton Suite in the Company's tenure as
nickeliferous. The untested, folded ~14km strike extent of the Dalton Suite
within the tenure includes five untested conductors identified from the
airborne electromagnetic (EM) survey in addition to the 800m Ni_04 geochemical
anomaly. The short strike length conductors A13 and A17 identified from the
airborne EM (Figure 4) in untested Ni_01 prospect may represent base of
channel sulphide accumulations in the Dalton Suite. Similar to the Radio Hill
deposit (M. De Angelis 1987), these anomalies also have coincident magnetic
anomalies.
Planning is underway to determine the follow up on the highly favourable
geochemical and geophysical anomalies within the Dalton Suite.
Figure 2: Surface sample location on GSWA geology
Figure 3: Surface Nickel assay results
Figure 4: Surface nickel results on airborne electromagnetic 230m depth
slice model.
For further information, please contact:
Greatland Gold plc
Shaun Day, Managing Director | info@greatlandgold.com
Nominated Advisor
SPARK Advisory Partners
Andrew Emmott / James Keeshan / Neil Baldwin | +44 203 368 3550
Corporate Brokers
Berenberg | Matthew Armitt / Jennifer Lee | +44 203 368 3550
Canaccord Genuity | James Asensio / George Grainger | +44 207 523 8000
SI Capital Limited | Nick Emerson / Sam Lomanto | +44 148 341 3500
Media Relations
UK - Gracechurch Group | Harry Chathli / Alexis Gore / Henry Gamble |
+44 204 582 3500
Australia - Fivemark Partners | Michael Vaughan | +61 422 602 720
About Greatland
Greatland is a mining development and exploration company focused primarily on
precious and base metals.
The Company's flagship asset is the world-class Havieron gold-copper project
in the Paterson Province of Western Australia, discovered by Greatland and
presently under development in joint venture with world gold major, Newmont
Corporation.
Havieron is located approximately 45km east of Newcrest's existing Telfer gold
mine. The box cut and decline to the Havieron orebody commenced in February
2021. Total development now exceeds 2,820m including over 2,030m of advance in
the main access decline (as at 8 October 2023). Subject to a positive
feasibility study and Decision to Mine, Havieron is intended to leverage the
existing Telfer infrastructure and processing plant. Access to Telfer will
de-risk the development and reduces capital expenditure.
Greatland has a proven track record of discovery and exploration success and
is pursuing the next generation of tier-one mineral deposits by applying
advanced exploration techniques in under-explored regions. Greatland has a
number of exploration projects across Western Australia and in parallel to the
development of Havieron is focused on becoming a multi-commodity miner of
significant scale.
Competent Persons Statement
Information in this announcement pertaining to Reporting of Exploration
Results has been reviewed and approved by Mr Damien Stephens, a Member of the
AusIMM, who has more than 30 years relevant industry experience. Mr Stephens
is a full-time employee of the Company and has a financial interest in
Greatland. Mr Stephens has sufficient experience relevant to the style of
mineralisation and type of deposit under consideration, and to the activity
which he is undertaking to qualify as a Competent Person as defined by the
2012 Edition of the Australasian Code for Reporting of Exploration Results,
Mineral Resources and Ore Reserves (the JORC Code) and under the AIM Rules -
Note for Mining and Oil and Gas Companies, which outline standards of
disclosure for mineral projects. Mr Stephens consents to the inclusion in
this announcement of the matters based on this information in the form and
context in which it appears. Mr Stephens confirms that the Company is not
aware of any new information or data that materially affects the information
included in the historical market announcements, and that the form and context
in which the information has been presented has not been materially modified.
References
Ore Geology Reviews - Nov. 2006 Nickel sulfide deposits in Australia:
Characteristics, resources, and potential. D Hoatson, S. Jaireth & A.
Jaques
AUSIMM proceeding vol 292 no. 4 1987. The nickel-copper deposit at Radio Hill,
Karratha, Western Australia. M. DE Angelis,W. Peters, & D. Wightman
JORC Code, 2012 Edition - Table 1
Section 1 Sampling Techniques and Data
Criteria JORC Code Explanation Commentary
Sampling techniques § Nature and quality of sampling (eg cut channels, random chips, or specific § a typical 200-300g soil sample was derived from a bulk sample taken from
specialised industry standard measurement tools appropriate to the minerals 15-30cm sample depth, which was then sieved to extract only the -180um fine
under investigation) fraction. Within subcrop/outcropping areas, multiple samples were combined and
sieved to achieve a representative 200-300g fine fraction sample.
§ Include reference to measures taken to ensure sample representivity and the
appropriate calibration of any measurement tools or systems used § Rock chip samples were taken of key lithologies, sulphide rich veins and
areas within critical EM conductors; approximately 2kg in weight.
§ Aspects of the determination of mineralisation that are Material to the
Public Report
§ In cases where 'industry standard' work has been done this would be
relatively simple (eg '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 (eg submarine nodules) may warrant disclosure of detailed
information
Drilling techniques § Drill type (eg core, reverse circulation, open-hole hammer, rotary air § NA
blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or
standard tube, depth of diamond tails, face-sampling bit or other type,
whether core is oriented and if so, by what method, etc)
Drill sample recovery § Method of recording and assessing core and chip sample recoveries and § NA
results assessed
§ Measures taken to maximise sample recovery and ensure 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 § Whether core and chip samples have been geologically and geotechnically § The logging is not of sufficient quality to support a Mineral Resource
logged to a level of detail to support appropriate Mineral Resource estimate.
estimation, mining studies and metallurgical studies
§ descriptions of lithology, were recorded where possible.
§ Whether logging is qualitative or quantitative in nature. Core (or costean,
channel, etc) photography
§ The total length and percentage of the relevant intersections logged
Sub-sampling techniques and sample preparation § If core, whether cut or sawn and whether quarter, half or all core taken. § samples were freighted by road to the laboratory.
§ If non-core, whether riffled, tube sampled, rotary split, etc and whether § The samples are assayed at Intertek (Perth, WA)
sampled wet or dry
§ For all sample types, the nature, quality and appropriateness of the sample
preparation technique
§ Quality control procedures adopted for all sub-sampling stages to maximise
representivity of samples
§ Measures taken to ensure that the sampling is representative of the in situ
material collected, including for instance results for field
duplicate/second-half sampling
§ Whether sample sizes are appropriate to the grain size of the material
being sampled
Quality of assay data and laboratory tests § The nature, quality and appropriateness of the assaying and laboratory § Soil samples were analysed using an aqua regia digestion method (AR10/MS52)
procedures used and whether the technique is considered partial or total with a 52 element package.
§ For geophysical tools, spectrometers, handheld XRF instruments, etc, the § Rock chips were prepared using a dry pulverisation method (SP03; 1.2-kg
parameters used in determining the analysis including instrument make and bulk sample) to a 75% passing 75um, with a 50g sub sample undergoing a four
model, reading times, calibrations factors applied and their derivation, etc acid digestion (4A/MS48) analysis with fire assay ICP-OES (FA50/OE04) for a
48-element suite (5ppb detection limit).
§ Nature of quality control procedures adopted (eg standards, blanks,
duplicates, external laboratory checks) and whether acceptable levels of § Low level gold standards were inserted every 50 samples
accuracy (ie lack of bias) and precision have been established.
§ Normal laboratory QA/QC standards were adhered to with regular insertion of
standars and blanks and duplicate assays.
Verification of sampling and assaying § The verification of significant intersections by either independent or § All data entry procedures, including original logging, sample location and
alternative company personnel. recording of sample numbers are recorded digitally in an electronic database
§ The use of twinned holes § There are no adjustments to assay data, other than below detection samples
are reported at negative one half the detection limit
§ Documentation of primary data, data entry procedures, data verification,
data storage (physical and electronic) protocols
§ Discuss any adjustment to assay data.
Location of data points § Accuracy and quality of surveys used to locate drill holes (collar and § sample locations were surveyed using hand held GPS. RL's were collected
down-hole surveys), trenches, mine workings and other locations used in with the same GPS
Mineral Resource estimation.
§ The topography is relatively high relief .
§ Specification of the grid system used.
§ All coordinates were recorded in the Geocentric Datum of Australian
§ Quality and adequacy of topographic control (GDA2020 Zone 51). All relative depth information is reported in Australian
Height Datum (AHD)
Data spacing and distribution § Data spacing for reporting of Exploration Results § soil samples were taken on a regular 200m x 50m grid with the closest
spacing across strike.
§ Whether the data spacing and distribution is sufficient to establish the
degree of geological and grade continuity appropriate for the Mineral Resource § Rocks chips were taken opportunistically where potential favourable
and Ore Reserve estimation procedure(s) and classifications applied lithologies or mineralisation outcropped
§ Whether sample compositing has been applied § No mineral resource estimate is possible in early stage exploration
§ No sample compositing has been applied
Orientation of data in relation to geological structure § Whether the orientation of sampling achieves unbiased sampling of possible § The soil sampling grid is considered unbiased .
structures and the extent to which this is known, considering the deposit type
§ Rock chip samples were opportunistically taken and will be biased towards
§ If the relationship between the drilling orientation and the orientation of overstating any mineralisation
key mineralised structures is considered to have introduced a sampling bias,
this should be assessed and reported if material
Sample security § The measures taken to ensure sample security § The security of samples is controlled by tracking samples from collection
point to database
§ samples are delivered by company personnel to a freight company in Port
Hedland for delivery by road freight to the assay lab in Perth, where the core
is assayed
Audits or reviews § The results of any audits or reviews of sampling techniques and data § No audits or reviews have been completed
Section 2 Reporting of Exploration Results
Criteria JORC Code explanation Commentary
Mineral tenement and land tenure status § Type, reference name/number, location and ownership including agreements or § The panorama project tenements E45/4936, E46/1170 and E46 1166 are 100%
material issues with third parties such as joint ventures, partnerships, owned by Greatland .
overriding royalties, native title interests, historical sites, wilderness or
national park and environmental settings § The tenements are subject to a Land Access Agreement with the Palyku
Aboriginal Corporation
§ 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 § Acknowledgment and appraisal of exploration by other parties § Minimal previous exploration work has been caried out on the tenure
Geology § Deposit type, geological setting and style of mineralisation § Exploration is for ultramafic hosted primary nickel sulphides and orogenic
gold.
Drill hole Information § A summary of all information material to the understanding of the § All surface sampling locations are displayed on Figure 2.
exploration results including a tabulation of the following information for
all Material drill holes: § Nickel results for all known samples taken on the properties are displayed
in Figure 3 on GSWA geology and the higher grade areas are shown in Figure 4
§ easting and northing of the drill hole collar on airborne Em depth section 230 m below surface.
§ elevation or RL (Reduced Level - elevation above sea level in metres) of § No drilling has been completed on the tenure.
the drill hole collar
§ Surface sample results locations are adequately disclosed on the maps.
§ dip and azimuth of the hole
§ down hole length and interception depth
§ hole 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 § In reporting Exploration Results, weighting averaging techniques, maximum § No economically significant results have been reported, and no data
and/or minimum grade truncations (eg cutting of high grades) and cut-off aggregation methods have been applied
grades are usually Material and should be stated
§ Where anomalous results are quoted (Table 2) the samples have been selected
§ Where aggregate intercepts incorporate short lengths of high grade results as follows:
and longer lengths of low grade results, the procedure used for such
aggregation should be stated and some typical examples of such aggregations - Ni > 1,800ppm; or
should be shown in detail
- Au >100ppb;
§ The assumptions used for any reporting of metal equivalent values should be
clearly stated
Relationship between mineralisation widths and intercept lengths § These relationships are particularly important in the reporting of § No economically significant results are reported, and there is no known
Exploration Results relationship between reported widths and the geometry of any 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 (eg 'down hole length, true width
not known')
Diagrams § Appropriate maps and sections (with scales) and tabulations of intercepts § Maps are provided in Figures 2-4. No significant discovery is reported
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 § Where comprehensive reporting of all Exploration Results is not § The reporting is considered balanced
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 § Other exploration data, if meaningful and material, should be reported § No other substantive exploration data other than that provided in the
including (but not limited to): geological observations; geophysical survey figures
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 § The nature and scale of planned further work (eg tests for lateral § Further ground geophysics and surface sampling and/or drilling of the EM
extensions or depth extensions or large-scale step-out drilling) conductors and Ni_04 geochemical anomaly are under consideration.
§ Diagrams clearly highlighting the areas of possible extensions, including
the main geological interpretations and future drilling areas, provided this
information is not commercially sensitive
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