REG - Savannah Resources - Encouraging first assays from Phase 2 drilling
27/03/2025 07:15
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RNS Number : 4687C Savannah Resources PLC 27 March 2025
27 March 2025
Savannah Resources Plc
(AIM: SAV) ('Savannah', or the 'Company')
First assay results from DFS Phase 2 drilling confirm zone of higher-grade
mineralisation at Pinheiro
Savannah Resources plc, the developer of the Barroso Lithium Project (the
'Project') in Portugal, Europe's largest spodumene lithium deposit, is pleased
to announce the first batch of assay results from Phase 2 of its Definitive
Feasibility Study ('DFS') drilling programme at the Project. The 117-hole,
c.13,000m programme is being undertaken for further JORC Resource definition,
geotechnical and metallurgical purposes.
Highlights:
· The Phase 2 drill programme for the DFS is well underway with six
drill rigs (3 Diamond, 3 Reverse Circulation ('RC')) active on site, targeting
the Pinheiro, Reservatório and Grandão deposits.
· To date 48 holes have been drilled for c. 4,817m in the planned 117
hole/c.13,000m programme.
· Lithium assays have been received from 20 holes to date (7 at
Pinheiro, 10 at Reservatório and 3 at Grandão) including results from 14
complete holes and 6 pre-collars which still require diamond drill tails to
fully test the pegmatite target.
· At Pinheiro, where the Project's highest intercepts to date were
reported last year (see 12 March RNS), recent drilling has:
o Returned pegmatite widths which are thicker and have higher lithium grades
than originally modelled.
o Confirmed mineralisation continues along strike to the north and south in
both the Western and Eastern Pegmatites, further highlighting the additional
resource potential.
· Significant lithium mineralisation intersections at Pinheiro include:
o 21m @ 1.26% Li(2)O from 95m in hole 25PNRRC026
o 26m @ 1.40% Li(2)O from 70m in hole 25PNRRC027
o 29m @ 1.33% Li(2)O from 47m in hole 25PNRRC028
o 24m @ 1.17% Li(2)O from 11m and 28m @ 1.21% Li(2)O from 38m in hole
25PNRRC030
· At Reservatório the RC drilling has initially targeted the depth
extension of the pegmatite and results received to date highlight good
continuity of contained lithium grades. This gives further confidence to the
existing geological modelling and current JORC (2012) compliant Resource
estimate for Reservatório of 4.2Mt at 0.94% Li(2)O. With some of the deeper
holes to be completed, potential for further depth extensions to this orebody
remains.
· Significant mineralised intersections at Reservatório include:
o 20m @ 1.06% Li(2)O from 127m including 13m @ 1.27% Li(2)O in hole
25RESRC046
o 33m @ 0.84% Li(2)O from 132m in hole 25RESRC047
o 21m @ 1.10% Li(2)O from 68m in hole 25RESRC053
o 23.1m @ 1.28% Li(2)O from 99m in hole 25RESRC054
· Initial results from Grandão confirm that mineralisation continues
in the shallow extensions of the deposit as demonstrated in hole 25GRARC136
which returned 9m @ 1.38% Li(2)O from 2m.
Savannah's Technical Director, Dale Ferguson said, "We have made good progress
to date with the Phase 2 drilling campaign and now with six rigs operating on
site, we expect to pick up the pace over the coming months as we look to
complete this c.13,000m programme.
"With reasonable turnaround times at the assay labs on samples, we're very
pleased to be able to announce these initial results from the first 20 holes
drilled across Pinheiro, Reservatório and Grandão today. There will be many
more results to come, but this first set act as a good demonstration of the
key objectives we are working on during this campaign.
"Most importantly, these initial results help to reiterate our confidence in
the grades and tonnages of the existing JORC Resource estimates for these
orebodies. Through this drilling, which will significantly increase the
database we have, we expect to be able to upgrade much of the existing
Inferred Resources into the higher Indicated and Measured categories. This in
turn will allow us to capture as much of the resource into the Project's
maiden JORC Reserve statement as possible as part of the DFS study.
"Furthermore, the drilling continues to confirm the continuation of pegmatite
and contained lithium mineralisation beyond the current orebody envelopes and
initial pit boundaries. This bodes well for future resource delineation from
multiple targets, both along strike and at depth. Significant exploration
upside remains at the Project, which we will continue to investigate and
highlight.
"Finally, the Pinheiro orebody continues to generate excitement, delivering
more intercepts which exceed our expectations in terms of widths and grades.
"The team and I look forward to reporting further results over the coming
months as we move towards the production of new JORC Resource estimates for
these orebodies as part of Project's DFS. Busy and exciting times lie ahead
for Savannah."
Further Information
As previously announced, Savannah started Phase 2 of the DFS-related drilling
programme at the Barroso Lithium Project in January 2025 (Figure 1). The
programme consists of drilling for resource, metallurgical and geotechnical
purposes using primarily RC rigs with some supplementary diamond drilling. To
date, approximately 4,817m of drilling has been completed of the 13,000m
initially planned for Phase 2. The programme is ongoing, and updates will be
provided as further results are received.
Figure 1. Barroso Lithium Project summary map showing deposits and drill hole
locations.
Pinheiro
Both pegmatites at Pinheiro (the Eastern and Western Pegmatites) have been
drilled in the vicinity of holes from previous programmes (RC and diamond
drilling). The focus of the drilling is to increase confidence in the existing
JORC Resource estimate, by demonstrating the continuity of lithium
mineralisation within the pegmatites. Hence, the Phase 2 holes have been
designed to infill the previous drilling by narrowing the grid spacing between
holes to 40m x 40m or less. Importantly, it has been possible to drill the RC
holes near to perpendicular to the dip of the sub-vertical pegmatites, giving
a good indication of the true width of mineralisation in both the Eastern and
Western Pegmatites. This has confirmed the geologic model outlined by the
previous drilling.
Significant recent lithium mineralisation intersections at Pinheiro include:
· 21m @ 1.26% Li(2)O from 95m in hole 25PNRRC026
· 26m @ 1.40% Li(2)O from 70m in hole 25PNRRC027
· 29m @ 1.33% Li(2)O from 47m in hole 25PNRRC028
· 6m @ 1.01% Li(2)O from 29m and 16m @ 0.78% Li(2)O from 38m, including
3m @ 1.03% Li(2)O and 3m @ 1.08% Li(2)O, in hole 25PNRRC029
· 6m @0.73% Li(2)O from 1m and 24m @ 1.17% Li(2)O from 11m, including
6m @ 1.64% Li(2)O, and 28m @ 1.21% Li(2)O from 38m, including 6m @ 1.67%
Li(2)O in hole 25PNRRC030
· 9m @ 0.77% Li(2)O from 42m, including 2m @ 1.54% Li(2)O, and 2.9m @
0.55% Li(2)O from 54m in hole 25PNRDD009
The drilling has shown that the Eastern Pegmatite is thicker than was
originally modelled, with drill hole intersections of up to 29m while grades
have been higher than the average resource grade of 1.0% Li(2)O. This has
confirmed the potential shown by previous drilling that both Eastern and
Western Pegmatites appear to increase in width and grade at depth.
This programme has also been designed to increase the resource by drilling
both of the pegmatites along strike to the north and south. To this end, 8
additional holes have been completed to date, including metallurgical and
geotechnical (diamond) drill holes, that intersected the main pegmatites at
Pinheiro. Results from these holes are awaited as drilling continues.
Figure 2. Location of Phase 2 diamond drilling at Pinheiro with significant
intercepts to date.
Figure 3. Cross section 1 Eastern Pegmatite of Pinheiro deposit (Section
A-A').
Figure 4. Cross section 2 Western Pegmatite of Pinheiro deposit (Section
B-B').
Reservatório
At Reservatório Phase 2 drilling has focused on deeper parts of the deposit
with (RC) drill holes in the central sector of the pegmatite intersecting
fresh and strongly mineralised pegmatite. Significant mineralised
intersections at Reservatório include:
· 20m @ 1.06% Li(2)O from 127m, including 13m @ 1.27% Li(2)O, in hole
25RESRC046
· 33m @ 0.84% Li(2)O from 132m, including 11m @ 1.08% Li(2)O and 7m @
1.01% Li(2)O, in hole 25RESRC047
· 21m @ 1.10% Li(2)O from 68m, including 6m @ 1.76% Li(2)O, and 9m @
1.02% Li(2)O from 93m in hole 25RESRC053
· 23.1m @ 1.28% Li(2)O from 99m including 5m @ 1.92% Li(2)O in hole
25RESRC054
Drill holes in the western limits of the pegmatite crossed a weathered sector
related to a local fault and did not cut through the foot wall (diamond tail
assay in progress).
The drilling operations at Reservatório are ongoing (Figures 5 and 6).
Figure 5. Location of Phase 2 diamond drilling at Reservatório with
significant intercepts from assays results.
Figure 6. Cross section 2 of Reservatório deposit (Section A - A').
Grandão
At Grandão a total of 8 drill holes have been completed to date as part of
the Phase 2 drilling, and the assaying process is in progress (Figure 7). The
assay results received so far include, 9m @ 1.38% Li(2)O from 2m in hole
25GRARC136, confirming that mineralisation continues in the shallow extensions
of the deposit.
Next steps
As part of the ongoing work required to deliver the DFS by the end of 2025,
Savannah's technical team and consultants are focused on:
· Completion of current Phase 2 drilling programme with assay results
and updates released periodically during the programme.
· Updates to the Pinheiro, Grandão and Reservatório JORC compliant
Resource estimates.
· Use of data and samples from the ongoing drilling programme to
complete the remaining metallurgical testwork and detailed geotechnical work
for the pits.
Figure 7. Location of Phase 1 diamond drilling at Grandão with significant
intercepts from assays results.
Competent Person and Regulatory Information
The information in this announcement that relates to exploration results is
based upon information compiled by Mr Dale Ferguson, Technical Director of
Savannah Resources Limited. Mr Ferguson is a Member of the Australasian
Institute of Mining and Metallurgy (AusIMM) and has sufficient experience
which is 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 in the December 2012 edition of the "Australasian
Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves"
(JORC Code) and a Qualified Person under the AIM Rules for Companies. Mr
Ferguson consents to the inclusion in the report of the matters based upon the
information in the form and context in which it appears.
Regulatory Information
This Announcement contains inside information for the purposes of the UK
version of the market abuse regulation (EU No. 596/2014) as it forms part of
United Kingdom domestic law by virtue of the European Union (Withdrawal) Act
2018 ("UK MAR").
Savannah - Enabling Europe's energy transition.
**ENDS**
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For further information please visit www.savannahresources
(http://www.savannahresources) .com or contact:
Savannah Resources PLC Tel: +44 20 7117 2489
Emanuel Proença, CEO
SP Angel Corporate Finance LLP (Nominated Advisor & Broker) Tel: +44 20 3470 0470
David Hignell/ Charlie Bouverat (Corporate Finance)
Grant Barker/Abigail Wayne (Sales & Broking)
Canaccord Genuity Limited (Joint Broker) Tel: +44 20 7523 8000
James Asensio / Charlie Hammond (Corporate Broking)
Ben Knott (Sales)
Camarco (UK Financial PR) Tel: +44 20 3757 4980
Gordon Poole/ Emily Hall / Nuthara Bandara
Portugal Media Relations
Savannah Resources: Antonio Neves Costa, Communications Manager Tel: +351 962 678 912
LPM Herminio Santos/ Jorge Coelho/ Margarida Pinheiro Tel: +351 218 508 110
About Savannah
Savannah Resources is a mineral resource development company and the sole
owner of the Barroso Lithium Project (the 'Project') in northern Portugal, the
largest battery grade spodumene lithium resource outlined to date in Europe.
Through the Project, Savannah will help Portugal to play an important role in
providing a long-term, locally sourced, lithium raw material supply for
Europe's lithium battery value chain. Once in operation the Project will
produce enough lithium (contained in c.190,000tpa of spodumene concentrate)
for approximately half a million vehicle battery packs per year and hence make
a significant contribution towards the European Commission's Critical Raw
Material Act goal of a minimum 10% of European endogenous lithium production
from 2030.
Savannah is focused on the responsible development and operation of the
Barroso Lithium Project so that its impact on the environment is minimised and
the socio-economic benefits that it can bring to all its stakeholders are
maximised.
The Company is listed and regulated on the London Stock Exchange's Alternative
Investment Market (AIM) and trades under the ticker "SAV".
APPENDIX 1Drill hole locations of Completed Phase 2 RC and Diamond Resource Holes (* with assays)
Hole_ID Prospect Hole Type Total East North Elevation Dip Azimuth
Depth (m) (mE) (mN) (mASL)
25GRARC134* Grandão RC 30 601928 4607806 578.315 -90 0
25GRARC135* Grandão RC 50 601889.8 4607673 587.037 -90 0
25GRARC136* Grandão RC 40 601884.1 4607652 595.216 -90 0
25GRARC137 Grandão RC 80 601773 4607635.7 606.98 -90 0
25GRARC138 Grandão RC 80 601776.4 4607634.5 606.944 -60 90.8
25GRARC139 Grandão RC 84 601803.9 4607696 577.296 -90 0
25GRARC140 Grandão RCDD 28 601817 4607719.1 562.221 -90 0
25GRARC141 Grandão RC 90 601787 4607764 551.000 -72 90.8
25PNRDD009* Pinheiro DD 84.85 601594.8 4606830 580.674 -60 270.8
25PNRDD010* Pinheiro DD 110.35 601590.2 4606831 584.335 -57 215.8
25PNRDD011 Pinheiro DD 120.75 601583.5 4606910.0 575.789 -50 263.8
25PNRDD012 Pinheiro DD 101.20 601580.0 4606910.0 575.799 -50 63.8
25PNRDD013 Pinheiro DD 124.90 601400.0 4606803 539 -60 90.8
25PNRDD014 Pinheiro DD 111.80 601414.6 4606856.2 561.412 -50 185.8
25PNRDD015 Pinheiro DD 126.80 601598.5 4607011.6 583.653 -50 310.8
25PNRDD017 Pinheiro DD 100 601599.3 4607011.1 583.444 -62 310.8
25PNRRC026* Pinheiro RCDD 120 601607.8 4606921 573.142 -70 270.8
25PNRRC027* Pinheiro RC 100 601578.5 4606880 581.596 -90 0
25PNRRC028* Pinheiro RCDD 77 601577.2 4606879 581.674 -80 270.8
25PNRRC029* Pinheiro RC 70 601575.2 4606878 581.625 -60 270.8
25PNRRC030* Pinheiro RC 70 601430.9 4606801 554.057 -60 90.8
25PNRRC031 Pinheiro RC 98 601599.7 4607010.5 583.381 -60 270.8
25PNRRC032 Pinheiro RC 100 601639.1 4607036.6 584.103 -60 270.8
25PNRRC033 Pinheiro RC 100 601637.0 4606996.0 573.179 -60 270.8
25PNRRC034 Pinheiro RC 84 601661 4607061 590 -60 270
25PNRRC035 Pinheiro RC 110 601594 4606976 573 -60 270
25RESRC046* Reservatório RCDD 184.8 599584 4609279 639.13 -80 150.8
25RESRC047* Reservatório RCDD 178.7 599585.8 4609276 639.213 -65 150.8
25RESRC048* Reservatório RCDD 186.5 599499 4609187 641.91 -90 0
25RESRC049* Reservatório RCDD 127 599500.8 4609184 641.809 -70 150.8
25RESRC050* Reservatório RCDD 99 599520.1 4609147 631.268 -63 150.8
25RESRC051* Reservatório RCDD 112 599618.4 4609288 620.822 -80 150.8
25RESRC052* Reservatório RCDD 114 599620 4609286 619.913 -70 150.8
25RESRC053* Reservatório RC 111 599695.2 4609243 613.628 -90 0
25RESRC054* Reservatório RCDD 122.1 599656.4 4609310 604.459 -90 0
25RESRC055* Reservatório RCDD 105 599657.8 4609307 604.364 -70 150.8
25RESRC056 Reservatório RC 88 599914.0 4609253.0 577.257 -80 0.8
25RESRC057 Reservatório RC 88 599916.0 4609247.6 577.038 -60 140.8
25RESRC058 Reservatório RCDD 96 599710.1 4609302.1 593.922 -80 150.8
25RESRC059 Reservatório RC 100 599951.0 4609212.0 586.493 -60 150.8
25RESRC060 Reservatório RCDD 147 599712.6 4609299 593.494 -60 150.8
25RESRC061 Reservatório RCDD 120 599784.0 4609267.0 588 -70 310.8
25RESRC062 Reservatório RCDD 120 599784.0 4609267.0 588 -90 0
25RESRC063 Reservatório RC 67 599934.8 4609230.8 581.484 -60 150.8
25RESRC064 Reservatório RC 55 599970 4609240 573 -60 150.8
25RESRC065 Reservatório RCDD 140 599503.9 4609102 617.839 -60 150.8
25RESRC066 Reservatório RC 70 599969 4609241 573 -80 0
25RESRC068 Reservatório RC 94 599969 4609241 573 -60 340
APPENDIX 2 - Summary of Significant Intercepts from the diamond drilling using
a 0.5% Li2O Cutoff.
Hole ID Prospect From To Interval Li(2)O
(m) (m) (m) (%)
25GRARC134 Grandão No significant results
25GRARC135 Grandão No significant results
25GRARC136 Grandão 2 11 9 1.38
25PNRDD009 Pinheiro 42 51 9 0.77
and 54 56.87 2.87 0.55
25PNRDD010 Pinheiro Geotechnical hole
25PNRRC026 Pinheiro 95 116 21 1.26
25PNRRC027 Pinheiro 70 96 26 1.40
25PNRRC028 Pinheiro 47 76 29 1.33
25PNRRC029 Pinheiro 29 35 6 1.01
and 38 54 16 0.78
25PNRRC030 Pinheiro 1 7 6 0.73
and 11 35 24 1.17
and 38 66 28 1.21
25RESRC046 Reservatório 127 147 20 1.06
25RESRC047 Reservatório 127 129 2 1.51
and 132 165 33 0.84
25RESRC048 Reservatório Diamond tail drilled awaiting assay
25RESRC049 Reservatório 121 127 6 0.95
25RESRC049 Reservatório Diamond tail drilled awaiting assay
25RESRC050 Reservatório Diamond tail drilled awaiting assay
25RESRC051 Reservatório Diamond tail currently underway
25RESRC052 Reservatório 112 114 2 0.85
25RESRC052 Reservatório Awaiting diamond tail
25RESRC053 Reservatório 68 89 21 1.10
and 93 102 9 1.02
25RESRC054 Reservatório 99 122.1 23.1 1.28
25RESRC055 Reservatório Awaiting diamond tail
APPENDIX 3 - JORC 2012 Table 1 - DFS Infill Drilling
JORC Table 1 Section 1 Sampling Techniques and Data
Criteria JORC Code Explanation Commentary
Sampling techniques · Nature and quality of sampling (e.g. cut channels, random chips, or · The majority of previous holes were reverse circulation, sampled
specific specialised industry standard measurement tools appropriate to the at 1m intervals. RC samples were collected in large plastic bags attached to
minerals under investigation, such as down hole gamma sondes, or handheld XRF the cyclone. On completion of the 1m run the large sample was passed through a
instruments, etc). These examples should not be taken as limiting the broad 3-stage riffle splitter to collect a 2.5-4kg sub sample, to be used for assay.
meaning of sampling.
· Diamond holes were completed for metallurgical sampling,
· Include reference to measures taken to ensure sample representivity geotechnical analysis and resource estimation. Core was PQ/HQ size, sampled at
and the appropriate calibration of any measurement tools or systems used. 1m intervals in the pegmatite, with boundaries sampled to geological
boundaries. Half core samples were collected for analysis.
· Aspects of the determination of mineralisation that are Material to
the Public Report. In cases where 'industry standard' work has been done this · Drilling was carried out to infill previous drilling to achieve a
would be relatively simple (e.g. 'reverse circulation drilling was used to nominal 40m by 40m spacing with selected infill to 40m by 20m spacings, or as
obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for twins of previous RC drilling to get known samples for metallurgical testing.
fire assay'). In other cases more explanation may be required, such as where Geotechnical drilling was designed purely to intersect planned pit walls and
there is coarse gold that has inherent sampling problems. Unusual commodities pegmatite intersections were incidental, but followed all standard logging and
or mineralisation types (e.g. submarine nodules) may warrant disclosure of sampling in line with all the drilling.
detailed information.
· Collar surveys are carried using differential DGPS with an
accuracy to within 0.2m.
· A down hole survey for each hole was completed using gyro
equipment.
· The lithium mineralisation is predominantly in the form of
Spodumene-bearing pegmatites, the pegmatites are unzoned and vary in thickness
from 5m-109m.
Drilling techniques · Drill type (e.g. core, reverse circulation, open-hole hammer, rotary • RC drilling used a 120mm diameter face sampling hammer.
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 type, · Core drilling was carried out using PQ/HQ single tube core
whether core is oriented and if so, by what method, etc). barrels.
Drill sample recovery · Method of recording and assessing core and chip sample recoveries and · RC drilling sample weights were monitored to ensure samples were
results assessed. maximised. Samples were carefully loaded into a splitter and split in the same
manner ensuring that the sample split to be sent to the assay laboratories
· Measures taken to maximise sample recovery and ensure representative were in the range of 4-6kg.
nature of the samples.
· Core recovery was measured and was found to be generally
· Whether a relationship exists between sample recovery and grade and excellent.
whether sample bias may have occurred due to preferential loss/gain of
fine/coarse material. · No obvious relationships between sample recovery and grade.
Logging · Whether core and chip samples have been geologically and · RC holes were logged in the field at the time of sampling. Core
geotechnically logged to a level of detail to support appropriate Mineral was logged in detail for a variety of physical characteristics in a logging
Resource estimation, mining studies and metallurgical studies. yard away from the drilling
· Whether logging is qualitative or quantitative in nature. Core (or · Each 1m sample interval was carefully homogenised and assessed
costean, channel, etc) photography. for lithology, colour, grainsize, structure and mineralisation. Core was
sampled to geological boundaries and at 1m intervals therein.
· The total length and percentage of the relevant intersections logged.
· A representative chip sample produced from RC drilling was washed
and taken for each 1m sample and stored in a chip tray which was photographed.
· Percussion holes were logged for every metre drilled with the
spoil collected for each metre by shovel and placed in a sample bag, a
representative sub sample was taken and logged for lithology, colour,
grainsize and mineralisation.
· Core was photographed.
Sub-sampling techniques and sample preparation · If core, whether cut or sawn and whether quarter, half or all core · 1m RC samples were split by the riffle splitter at the drill rig
taken. and sampled dry.
· If non-core, whether riffled, tube sampled, rotary split, etc and · Core was cut in half using a diamond saw with 1m half core
whether sampled wet or dry. samples submitted for analysis or for metallurgical samples one of the halves
was cut again for a quarter core and sent for analysis.
· For all sample types, the nature, quality and appropriateness of the
sample preparation technique. · The sampling was conducted using industry standard techniques and
were considered appropriate.
· Quality control procedures adopted for all sub-sampling stages to
maximise representivity of samples. · Field duplicates were used to test repeatability of the
sub-sampling and were found to be satisfactory.
· Measures taken to ensure that the sampling is representative of the
in-situ material collected, including for instance results for field · Every effort was made to ensure that the samples were
duplicate/second-half sampling. representative and not biased in any way.
· 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 · Samples were received, sorted, labelled, and dried.
laboratory procedures used and whether the technique is considered partial or
total. · Samples were crushed to 70% less than 2mm, riffle split off 250g,
pulverise split to better than 85% passing 75 microns and 5g was split of for
· For geophysical tools, spectrometers, handheld XRF instruments, etc, assaying.
the parameters used in determining the analysis including instrument make and
model, reading times, calibrations factors applied and their derivation, etc. · The samples were analysed using ALS Laboratories ME-MS89L Super
Trace method which combines a sodium peroxide fusion with ICP-MS
· Nature of quality control procedures adopted (e.g. standards, blanks, instrumentation utilising collision/reaction cell technologies to provide the
duplicates, external laboratory checks) and whether acceptable levels of lowest detection limits available.
accuracy (i.e. lack of bias) and precision have been established.
· A prepared sample (0.2g) is added to sodium peroxide flux, mixed
well and then fused in at 670°C. The resulting melt is cooled and then
dissolved in 30% hydrochloric acid. This solution is then analysed by ICP-MS
and the results are corrected for spectral inter-element interferences.
· The final solution is then analysed by ICP-MS, with results
corrected for spectral inter-element interferences.
· Standards/blanks and duplicates were inserted on a 1:20 ratio for
both to samples taken.
· Duplicate sample regime is used to monitor sampling methodology
and homogeneity.
· Routine QA/QC controls for the method ME-MS89L include blanks,
certified reference standards of Lithium and duplicate samples. Samples are
assayed within runs or batches up to 150 samples. At the fusion stage that
quality control samples are included together with the samples, so all samples
follow the same procedure until the end. Fused and diluted samples are
prepared for ICP-MS analysis. ICP instrument is calibrated through appropriate
certified standards solutions and interference corrections to achieve strict
calibration fitting parameters. Each 40-sample run is assayed with two blanks,
two certified standards and one duplicate sample and results are evaluated
accordingly.
· A QA/QC review of all information indicated that all assays were
satisfactory.
Verification of sampling and assaying · The verification of significant intersections by either independent · All information was internally audited by company personnel.
or alternative company personnel.
· During this programme no holes were twinned.
· The use of twinned holes.
· Savannah's experienced project geologists supervised all
· Documentation of primary data, data entry procedures, data processes.
verification, data storage (physical and electronic) protocols.
· All field data is entered into a custom log sheet and then into
· Discuss any adjustment to assay data. excel spreadsheets (supported by look-up tables) at site and subsequently
validated as it is imported into the centralised Access database.
· Hard copies of logs, survey and sampling data are stored in the
local office and electronic data is stored on the company's cloud drive.
· Results were reported as Li (ppm) and were converted to a
percentage by dividing by 10,000 and then to Li(2)O% by multiplying by 2.153.
Location of data points · Accuracy and quality of surveys used to locate drill holes (collar · The coordinate of each drill hole was taken at the time of
and down-hole surveys), trenches, mine workings and other locations used in collecting using a handheld GPS with an accuracy of 5m. All collars were
Mineral Resource estimation. subsequently surveyed using DGPS with an accuracy of 0.2m.
· Specification of the grid system used. · The grid system used is WSG84 Zone29N.
· Quality and adequacy of topographic control. · An accurate, aerial topographic survey was obtained with accuracy
of +/- 0.5m.
Data spacing and distribution · Data spacing for reporting of Exploration Results. · Drilling was carried out on an infill basis to attain on a
nominal 40m by 40m and based on geological targets with selected infill to 40m
· Whether the data spacing and distribution is sufficient to establish by 20m.
the degree of geological and grade continuity appropriate for the Mineral
Resource and Ore Reserve estimation procedure(s) and classifications applied. · Drill data is considered of sufficient spacing to define Measured
and Indicated Mineral Resource in accordance with requirements for a DFS
· Whether sample compositing has been applied.
· Compositing to 1m will be applied prior to resource estimation.
Orientation of data in relation to geological structure · Whether the orientation of sampling achieves unbiased sampling of · Drilling was generally carried out using angled holes, as close
possible structures and the extent to which this is known, considering the to perpendicular to strike as possible. All Geotech holes were drilled in
deposit type. various orientations to intersect planned pit walls. According to the expert
(GGC - Consultants) requirements.
· If the relationship between the drilling orientation and the
orientation of 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. · Samples were delivered to a courier and chain of custody is
managed by Savannah.
Audits or reviews · The results of any audits or reviews of sampling techniques and data. · Internal company auditing based on previous programmes is carried
out and an external review will be carried out by the resource consultant to
assure that all data collection and QA/QC procedures were conducted to
industry standards.
JORC Table 1 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 · All work was completed inside the Mina do Barroso project C-100.
agreements or material issues with third parties such as joint ventures,
partnerships, overriding royalties, native title interests, historical sites, · Savannah has received written confirmation from the DGEG that
wilderness or national park and environmental settings. under article 24 of Decree-Law no. 88/90 of March 16 being relevant
justification based on the resources allocated exploited and intended,
· The security of the tenure held at the time of reporting along with any Savannah has been approved an expansion up to 250m of C100 mining concession
known impediments to obtaining a license to operate in the area. in specific areas where a resource has been defined and the requirement for
the expansion can be justified.
· The entire Phase 2 includes a total of 117 drill holes. The
surface access was granted by an administrative easement right defined in the
C-100 mining contract, 95 of the drill holes were included in a first easement
process, and the remaining 22 were subject to second easement that is still in
progress.
Exploration done by other parties · Acknowledgment and appraisal of exploration by other parties. · Limited exploration work has been carried out by previous
operators.
· No historic information has been included in the Mineral Resource
estimates.
Geology · Deposit type, geological setting and style of mineralisation. · The lithium mineralisation is predominantly in the form of
Spodumene-bearing pegmatites which are hosted in meta-pelitic and mica
schists, and occasionally carbonate schists of upper Ordovician to lower
Devonian age. The pegmatites vary in thickness from 5m-109m.
Drill hole information · A summary of all information material to the under-standing of the · A table containing all drill holes drilled and a list of significant
exploration results including a tabulation of the following information for assays from the results received is included with the release.
all Material drill holes:
· No material data has been excluded from the release.
· easting and northing of the drill hole collar
.
· elevation or RL (Reduced Level - elevation above sea level in metres)
of the drill hole collar
· 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, · Length weighted average grades have been reported.
maximum and/or minimum grade truncations (e.g. cutting of high grades) and
cut-off grades are usually Material and should be stated. · No high-grade cuts have been applied to reported grades.
· Where aggregate intercepts incorporate short lengths of high-grade · Metal equivalent values are not being reported; however, Li is
results and longer lengths of low grade results, the procedure used for such reported as ppm and converted to the oxide Li(2)O for resource purposes. The
aggregation should be stated and some typical examples of such aggregations conversion factor used is to divide the Li value by 10,000 and multiplying by
should be shown in detail. 2.153 to represent the value as a percentage.
· 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 · The majority of holes have been drilled at angles to intersect the
Exploration Results. mineralisation in perpendicular relation to the pegmatite
· 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 · Appropriate maps and sections (with scales) and tabulations of · A relevant plan showing the drilling is included within this
intercepts should be included for any significant discovery being reported. release.
These should include, but not be limited to a plan view of drill hole collar
locations and appropriate sectional views.
Balanced Reporting · Accuracy and quality of surveys used to locate drill holes (collar · All relevant results available have been previously reported.
and down-hole surveys), trenches, mine workings and other locations used in
Mineral Resource estimation.
· 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 · Other exploration data, if meaningful and material, should be reported · Geological mapping and rock chip sampling has been conducted over
including (but not limited to): geological observations; geophysical survey the project area.
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 (e.g. tests for lateral · The present drill programme has been designed to infill previous
extensions or depth extensions or large- scale step-out drilling). drilling to attain a measured or indicated class for an upcoming resource
estimation. Further work is being planned as part of a second phase of
· Diagrams clearly highlighting the areas of possible extensions, resource infill drilling.
including the main geological interpretations and future drilling areas,
provided this information is not commercially sensitive. · Economic evaluation of the defined Mineral Resources, will be
completed after the second phase of drilling.
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