Birimian Limited: High-Grade Goulamina Lithium Deposit Resource Expansion
(firmenpresse) - Birimian Limited: High-Grade Goulamina Lithium Deposit Resource Expansion
- Updated Goulamina Mineral Resource;
- 27.8 Mt (at) 1.42 % Li2O (393,000t contained Li2O)
- Interim resource estimate confirms substantial high-grade, near surface expansion to Project resources
- Resource category upgrades and further resource additions expected following inclusion of pending drill results due early May 2017
- Strong potential to add significant tonnages of shallow, high grade lithium mineralisation with further drilling
- Pre-Feasibility Study on track for June 2017 quarter
Birimian Limited (ASX:BGS; Birimian and Company - http://www.commodity-tv.net/c/mid,2697,Company_Presentation/?v=297188 ) ) is pleased to report an updated Mineral Resource estimate for the Goulamina deposit, at its Bougouni Lithium Project in Mali.
The Mineral Resource at Goulamina now comprises 27.8 Mt (at) 1.42 % Li2O, for 393,000 tonnes of contained Li2O (Table 1). This nearly doubles the previous estimate for contained lithia and further confirms Goulamina as among the highest grade, hard rock lithium deposits of significant size globally today.
Commenting on the milestone, Birimian Managing Director Mr Kevin Joyce said, "The latest resource estimate is an outstanding result, which includes extensions to mineralisation at West Zone and the new discovery at Sangar Zone. The combination of these increased resources and expected near-term resource category upgrades will underpin the project Pre-Feasibility Study which is currently in progress.
"Present resources are beyond our early expectations and now exceed the Companys original exploration target for contained lithia. Importantly, there is significant potential to further expand the Goulamina resource.
"Birimian is in a strong cash position with sufficient capital to fund development activities through to completion of the Project Pre-Feasibility Study, which is expected in the June quarter.
Mineral Resource Estimate
Cube Consulting (Cube) was engaged to carry out the updated Mineral Resource estimate for the Goulamina deposit. This estimate now includes extensions at West Zone and the recently discovered Sangar Zone to the south west. Detailed information relating to data, quality control, and estimation methodology are documented in Appendix 1 - JORC Table 1, Sections 1 to 3.
Combined resources, estimated to Indicated and Inferred confidence levels, are shown in Table 1. The resource area at the Main Zone pegmatite has not been re-modelled and remains unchanged from the maiden resource estimate (ASX: 27 October 2016).
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Table 1. Goulamina Mineral Resource classifications.
Birimian provided the principal sources of information used in this Mineral Resource estimate including drilling databases, a topographic surface, mapping information and a geological interpretation of the mineralised pegmatites. An additional 29 holes have been included in the updated estimate, which augment the 51 holes which informed the maiden resource model.
Approximately 65 holes were pending assay results at the time of resource estimation and have not been included in the current estimate. These holes include some extensional drilling at Main and West Zone, but largely relate to 25m spaced infill drill sections designed to improve geological and resource confidence. Further resource expansion and resource category upgrades are likely when this drilling is included in a subsequent estimate which is expected in early May.
The mineral resources are defined by reverse circulation (RC) and diamond (DD) drilling. The majority of the new drilling included in the estimate is at 50m x 50m spacing over the West and Sangar pegmatite zones. This spacing is adequate to establish the geological and grade continuity for reporting an Inferred category resource.
The spodumene (lithium) pegmatite mineralisation at Goulamina occurs as three well defined, broadly parallel and highly continuous dykes; the Main Zone, West Zone, and Sangar Zone (Figure 1, 2 and 3). Cross cutting mineralised dykes, identified in outcrop and drilling, are less well-defined and have not been included as classified resources at this point in time.
Mineralised domains for separate pegmatite dykes were digitised in cross-section and then wireframed to generate solids. There is a very strong correlation between the mineralised portion of the pegmatite dykes and the total dyke mineralised intercept. Very little pegmatite material is not significantly elevated in lithium content; thus the mineralisation boundaries generally match the lithological boundaries of the dykes. Wireframe solids were used to populate the block model and interpolated Li2O grade by ordinary kriging methods.
It has been assumed that the resource would be mined using open pit methods, which is supported by conceptual mining studies. The previous metallurgical studies provide a sufficient basis for the assumption regarding metallurgical amenability, and determining reasonable prospects for eventual economic extraction.
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Figure 1. Goulamina Deposit. Plan view of lithium pegmatite with drill hole locations.
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Figure 2. Goulamina Deposit - Main Zone and West Zone cross sections.
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Figure 3. Goulamina Deposit - Sangar Zone cross section.
Goulamina - A Large Tonnage High Grade Lithium Deposit
The updated resource estimate at Goulamina confirms a high-grade and bulk tonnage lithium deposit.
The grade-tonnage curve for updated inferred resources at West Zone is shown in Figure 4. The global resource is reported at 0% Li2O cut-off. At elevated cut-off grades, the tonnages of mineralisation do not vary substantially. This confirms the robust grade and good continuity of the modelled mineralisation. Increased resource tonnages have resulted in a slight reduction of resource grade, but significantly increased contained lithia. Resource grade remains substantially higher than the estimated mining cut-off grade of 0.82% Li2O. (ASX: 13 March 2017). The latest resource estimate satisfies Milestone One of the management incentives plan.
Mineralisation is still open at all three mineralised zones and there remains significant untapped exploration potential within the 250km2 project area. Birimian remains confident that as project development work evolves, it will progressively increase the lithia inventory at Goulamina.
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Figure 4. Goulamina West Zone grade tonnage curve.
Forward Plan
On 30 January 2017, Birimian announced that the Scoping Study for the Bougouni Lithium Project had confirmed the outstanding potential of the Project, leading to the decision to commence a PreFeasibility Study (PFS). Scoping Study results suggest that the Goulamina deposit will be amenable to low cost, open pit mining and staged processing plant development, benefiting from low mining strip ratios, high grade at surface mineralisation, and the low cost operating environment in Mali. The PFS remains on track to be completed during the June 2017 quarter.
Drilling at the Project has paused briefly while the company awaits assay results to undertake further detailed resource estimation work and other resource related technical studies. Given the relatively steady progress with recent drilling and the extended time required for assay to be returned, a further update to the resource model is now anticipated by early May. This estimate is expected to include all results from infill drilling to support significant resource category upgrades and facilitate detailed Pre-Feasibility studies.
In parallel with resource estimation, Birimian continues to advance a number of studies as it works towards completion of the PFS. The Company's strategy is to expedite development of the currently defined resources at the Bougouni Project in lieu of targeting major resource expansions by drilling. The next phase of development drilling is currently being planned. This program will be designed to:
- Further upgrade resource categories
- Confirm geotechnical parameters for open pit mine planning
- Confirm plant, associated infrastructure, waste dump and Tailings Storage Facility locations
Digby Wells Environmental has completed field work relating to the next phase of detailed sustainability studies at the Project and in the broader community. This is important as findings will facilitate ongoing engineering studies and development drilling planning, and will enable Digby Wells to prepare the Terms of Reference for the Environmental and Social Impact Assessment (ESIA). At this stage it is proposed to present the Project Terms of Reference to government at the end of April, signaling the formal commencement of the project ESIA and leading to mine permitting.
Birimian is seeking to fast-track commercialisation of Bougouni. As such, the other key milestones to look forward to are metallurgical test work results and an upgraded resource estimate, both of which are expected to be completed in the current quarter. Following this, the PFS is expected to also be completed in the June 2017 quarter, enabling the Company to progress project financing and offtake arrangements, in parallel with the mine permitting process.
ASX Additional Information - Material Assumptions
The following is a summary of Material Information used to estimate the Mineral Resource as required by Listing Rule 5.8.1 and JORC 2012 Reporting Guidelines.
Mineral Tenement and Land Tenure Status
The deposit lies within the Torakoro Research Permit which is owned 100% by Timbuktu Ressources, a wholly owned Malian subsidiary of Birimian Limited. The mineral property is in good standing and there is no known impediment to obtaining a license to operate.
Geology
The project area is located within the Bougouni region of the southern Mali, where broadly north-south trending belts of Birimian-aged (Paleoproterozoic) metavolcanic and metasedimentary rocks are intruded by syn-and post-orogenic granitoids.
Within the Project area, outcrop is limited and basement geology is therefore poorly understood. Regolith typically comprises a surficial transported gravel horizon (locally termed Cuirasse) overlying a thin lateritic weathering profile. Mapping indicates NE-striking metapelite and metagreywacke rocks in the north and eastern parts of the property. The southern portion of the project area is dominated by granodiorite.
All pegmatite bodies contain anomalous or significant amounts of the mineral spodumene (a lithium-bearing pyroxene), along with the other major minerals of quartz and feldspar (albite and microcline); From the geological logging, there are also accessory amounts of muscovite, tourmaline, apatite, and biotite at the granite contacts.
Drilling Techniques and Hole Spacing
Holes were drilled in two phases, from May to September 2016, and December 2016 to February 2017. In total 80 holes inform the current resource estimate.
RC drilling was completed by Foraco Drilling and International Drilling Company (IDC), using nominally 5.5 diameter equipment, with a face sampling downhole hammer. The Foraco rig had an outboard compressor, with specifications of 1100CFM(at)350PSI. The IDC rig had an onboard compressor with specifications of 1150CFM(at)500PSI
Core drilling was completed using equipment supplied and operated by Foraco Drilling and IDC. All holes are standard HQ sized holes (core diameter 64mm). DD holes are a combination of some drilled from surface and some as diamond tails on RC holes (including extensions to previously drilled Phase 1 holes).
Sampling
All samples collected from the RC rig were collected at 1m downhole intervals. Samples were split into pre-numbered calico bags at the rig using a 3-stage riffle splitter yielding a sample of between 3 to 5 kilograms. In addition to the 1m sample, duplicate samples were taken every 20m downhole. Blanks and standards were inserted into the sample stream at a rate of 1:40 for Blanks, and 1:40 for Standards.
All data is documented in a sampling ledger, including hole number, date drilled, sample id, depths from and to, sample condition, sample type, percentage sample return and all certified standards blanks and duplicates.
Drill core was sawn in half along its long axis. One half of the drill core was taken for geochemical analysis. All samples were collected at 1m intervals down the hole. 100% core recoveries were typically achieved.
Sample Analysis
Sample preparation work was conducted in the ALS Laboratory in Ouagadougou, Burkina Faso. At the laboratory, samples were weighed, dried and crushed to -2mm in a jaw crusher. A 1.0kg split of the crushed sample was subsequently pulverised in a ring mill to achieve a nominal pulp particle size of 85% passing 75m. Sample sizes and laboratory preparation techniques are considered to be appropriate.
After pulverisation, sub-samples were sent to ALS Laboratory in Perth for assay. Analysis for lithium and a suite of other elements was undertaken by ICP-AES, after a sodium peroxide (Na2O2) fusion - ALS Method ME-ICP89. Some of the multi-element analysis uses a MS finish - ALS Method ME-MS91. This fusion technique is considered to be a total dissolution technique for lithium-bearing silicate minerals. Detection limits for lithium are 0.01-10%.
Estimation Methodology
Interpreted sections were wireframed using Surpac software to create 3D solids for each pegmatite domain within the resource area. The drillhole data was sliced on 50m spaced sections for modelling of the geology and the mineralised envelopes. Solids were constructed for 4 discreet pegmatite dykes, as well as for the near surface colluvium and lateritic material.
Mineralisation in the Main Zone and West Zone pegmatites was composited to 3m downhole intervals to reduce the variability inherent in raw samples or a smaller composite length relative to estimation resource model block dimensions.
Surpac software was used for the modelling and estimation, with SuperVisor software used to conduct geostatistical analysis. The main pegmatite domains in the block model were estimated using interpolation of grade via Ordinary Kriging (OK), which was considered to be an acceptable method given the strong geological control, the drilling density and the data distribution downhole.
A single block model was created by Cube with dimensions extended out to fully cover all of the mineralisation, plus surrounds that may be contained within pit optimisation shells. The parent block size used is 20mN x 20mE x 5mRL and sub-blocked to 1.25mN x 2.5mE x 2.5mRL.
Resource Classification
A range of criteria were considered by Cube when addressing the suitability of the classification boundaries. These criteria include:
- Geological continuity and volume;
- Drill spacing and drill data quality;
- Modelling technique; and
- Estimation properties including search strategy, number of informing composites, average distance of composites from blocks and kriging quality parameters.
Blocks have been classified as Indicated or Inferred, mostly based on drill data spacing in combination with kriging parameters.
Cut-off Grade
For the global resource estimation, no lower cutoff grade for reporting is used, as the model is essentially developed within a geological boundary, and the resource incorporates everything within the modelled pegmatite dykes.
Mining and Metallurgy
Conceptual mining studies are based on open cut mining methods using a contract mining fleet and conventional drill and blast mining methods. Limited inspection of core photography indicates that ground conditions are suitable for this mining method.
The resource has been trimmed by intersecting with a pit shell based on a Whittle optimisation at a revenue factor (USD$650/t for a nominal 6% Li2O concentrate). Material falling outside of this shell is considered to not meet reasonable prospects for eventual economic extraction. Reasonable prospects for eventual economic extraction have been determined with reference to the results of previous Whittle optimization studies, and the depth of the selected open pit shell (at a revenue factor of USD$650/t for a nominal 6% Li2O concentrate) was used as an analogy to help limit the depth for reporting the Sangar Zone.
The criteria for assumptions and predictions regarding metallurgical amenability - required to determine reasonable prospects for eventual economic extraction - are based on the bulk sampling and test program undertaken in 2008 by CSA Global (UK), work that was commissioned and funded by the World Bank as part of the SYSMIN economic development program. CSA Global undertook systematic sampling of outcropping material at Goulamina to collect a representative bulk sample comprising 3,150kg of material, which was subsequently crushed and split to 750kg for detailed processing test work. This work included evaluations of screen sizing to optimize spodumene (lithium) recoveries and preliminary dense media separation tests. The results of this study indicated good spodumene recoveries and a high mass yield, to produce a high quality chemical grade spodumene concentrate.
For further information contact:
Mr Kevin Joyce
Managing Director
08 9286 3045
info(at)birimian.com
In Europe:
Swiss Resource Capital AG
Jochen Staiger
info(at)resource-capital.ch
www.resource-capital.ch
Competent Persons Declaration
The information in this announcement that relates to exploration results and the Exploration Target is based on information compiled by or under the supervision of Kevin Anthony Joyce. Mr Joyce is Managing Director of Birimian Limited and a Member of the Australian Institute of Geoscientists. Mr Joyce has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration and the activity 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 Joyce consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
The information in this announcement that relates to Mineral Resources is based on information compiled by or under the supervision of Mr. Matt Bampton, who is a Member of The Australasian Institute of Mining and Metallurgy and a Member of the Australian Institute of Geoscientists. Mr Bampton is a full-time employee of Cube Consulting Pty Ltd and has sufficient experience which is relevant to the styles of mineralisation and types 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 Bampton consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
Previous Reported Results
There is information in this announcement relating to previous Exploration Results at the Bougouni Project. The Company confirms that it is not aware of any other new information or data that materially affects the information included in the original market announcement, and that all material assumptions and technical parameters have not materially changed. The Company confirms that the form and context in which the Competent Persons findings are presented have not been materially modified from the original market announcement.
Forward Looking Statements
Statements regarding plans with respect to the Companys mineral properties are forward looking statements. There can be no assurance that the Companys plans for development of its mineral properties will proceed as expected. There can be no assurance that the Company will be able to confirm the presence of mineral deposits, that any mineralisation will prove to be economic or that a mine will successfully be developed on any of the Companys mineral properties.
JORC Code, 2012 Edition - Table 1
Section 1 - Sampling Techniques and Data
CriteriJORC Code explanation Commentary
a
Samplin· Nature and quality of · Diamond Drill Core (DD)
g sampling and Reverse Circulation
techni ( (RC) chips are the two
ques eg cut channels, random main sample
chips, or specific types.
specialised industry
standard measurement · RC drill holes were
tools appropriate to the routinely sampled at 1m
minerals under intervals down the hole,
investigation, such as with samples collected at
down hole gamma sondes, the drill rig by riffle
or handheld XRF splitting drill spoils to
instruments, collect a nominal 2.5 -
4kg sub sample, with an
etc). These examples additional 50% split for
should not be taken as material > 5
limiting the broad kg.
meaning of
sampling. · Routine standard
reference material, sample
· Include reference to blanks, and sample
measures taken to ensure duplicates were inserted
sample or collected at every 10th
sample in the sample
representivity and the sequence for RC drill
appropriate calibration holes.
of any measurement tools
or systems · Nominal 2.5kg sub samples
used. were collected from half
sawn HQ sized diamond
· Aspects of the drill core, routinely
determination of sampled at 1m intervals
mineralisation that are down the
Material to the Public hole.
Report.
· Routine standard
· In cases where industry reference material and
standard work has been sample blanks were
done this would be inserted/collected at
relatively simple every 20th sample in the
( sample sequence for DD
eg reverse circulation drill
drilling was used to holes.
obtain 1 m samples from
which 3 kg was pulverised · All samples were
to produce a 30 g charge submitted to ALS Bamako
for fire assay). In and subsequently forwarded
other cases more to ALS Ouagadougou for
explanation may be preparation. Analysis was
required, such as where undertaken at ALS Perth by
there is coarse gold that method
has inherent sampling ME-ICP89
problems. Unusual
commodities or
mineralisation types
(
eg submarine nodules) may
warrant disclosure of
detailed
information.
Drillin· Drill type (eg core, · Drill holes were
g reverse circulation, generally angled at -60°
techni open-hole hammer, rotary towards 270° (WGS84_29N
ques air blast, auger, Bangka, grid)
sonic,
· RC drilling equipment is
etc) and details (eg core nominally 5.5 diameter,
diameter, triple or with a face sampling down
standard tube, depth of
diamond tails, hole hammer.
face-sampling bit or · RC drilling was
other type, whether core undertaken using the
is oriented and if so, by following equipment -
what method,
etc). o Purpose built RC Rig (Fora
co
Drilling) with an outboard
compressor;
specifications of
1100CFM(at)350PSI
o Schramm 685 RC Rig (IDC Dr
illing) with an
onboardcompressor;
specifications of
1150
CFM(at)500PSI
· DD holes are standard
tube HQ sized holes (core
diameter
64mm)
· DD holes were drilled
using
the following equipment -
o Purpose built drill rig
supplied
and operated by Foraco Drill
ing
o KL900 rig supplied and
operated by IDC
o Atlas Copco CT14 rig suppl
ied
and operated by IDC
· DD holes are a
combination of some
drilled from surface
(lengths varied between
21m and 110m), and some as
diamond tails on RC holes
(lengths varied between
100m and
195m).
· Core Orientations were
performed with a Reflex
ACT II RD rapid descent
core orientation
tool
Drill · Method of recording and · A qualitative estimate of
sample assessing core and chip sample recovery was done
recove sample recoveries and for each sample metre
ry results collected from the drill
assessed. rig for RC
holes.
· Measures taken to
maximise sample recovery · Riffle split samples were
and ensure representative weighed to ensure
nature of the consistency of sample size
samples. and to monitor sample
recoveries.
· Whether a relationship
exists between sample · A quantitative measure of
recovery and grade and sample recovery was done
whether sample bias may for each run of drill core
have occurred due to for DD
preferential loss/gain of holes.
fine/coarse
material. · Drill sample recovery in
the DD holes
approximates 100% in
mineralised
zones.
· Overall, drill sample
recovery and quality is
considered to be adequate
for the RC drilling, and
is considered to be
excellent for the DD
holes.
· There is the possibility
of some low-level
contamination from the
drill bits and rods on
subsequent iron
assays.
Logging· Whether core and chip · All drill sample
samples have been intervals were
geologically and geologically logged by
Company
geotechnically logged to a Geologists.
level of detail to
support appropriate · Where appropriate,
Mineral Resource geological logging
estimation, mining recorded the abundance of
studies and metallurgical specific minerals, rock
studies. types and weathering using
a standardized logging
· Whether logging is system.
qualitative or
quantitative in nature. · For RC holes, a small
Core (or sample of washed drill
material was retained in
costean, channel, etc) chip trays for future
photography. reference and validation
of geological logging, and
· The total length and an additional 100g of
percentage of the drill material was
relevant intersections retained in plastic bags
logged. for the same
purpose.
· For DD holes, all core
was photo-graphed both Wet
and
Dry.
· For most holes, the
entire drill hole was
logged and sampled. Barren
granite away from the
pegmatite dykes was not
routinely
sampled.
Sub-sam· If core, whether cut or · RC 1m samples were riffle
pling sawn and whether quarter, split at the drill rig,
techni half or all core and routine field sample
ques taken. duplicates were taken to
and evaluate whether samples
sample· If non-core, whether were
prepar riffled, tube sampled, representative.
ation rotary split,
· Drill core was sawn in
etc and whether sampled half along its long axis.
wet or One half of the drill core
dry. was taken
for
· For all sample types, geochemical analysis. All
the nature, quality and samples were collected at
appropriateness of the 1m intervals down the
sample preparation hole.
technique.
· Sample preparation was
· Quality control undertaken by ALS
procedures adopted for Ouagadougou
all sub-sampling stages laboratory.
to maximise
· At the laboratory,
representivity of samples. samples were weighed,
· Measures taken to ensure dried and crushed to -2mm
that the sampling is in a jaw crusher. A 1.0kg
representative of the in split of the crushed
situ material collected, sample was pulverised in a
including for instance steel ring mill to achieve
results for field a nominal particle size of
duplicate/second-half 85% passing
sampling. 75m.
· Whether sample sizes are · Sample sizes and
appropriate to the grain laboratory preparation
size of the material techniques are considered
being to be appropriate for
sampled. lithium, but may have
introduced a small level
of contamination for iron
from the sample
preparation
equipment.
Quality· The nature, quality and · Analysis for lithium and
of appropriateness of the a suite of other elements
assay assaying and laboratory was undertaken at ALS
data procedures used and Perth by ICPAES after
and whether the technique is Sodium Peroxide Fusion.
labora considered partial or Detection limits for
tory total. lithium (0.01
tests -10%)
· For geophysical tools,
spectrometers, handheld · Sodium Peroxide fusion is
XRF instruments, considered a total assay
technique for
etc, the parameters used lithium
in determining the
analysis including · No geophysical tools or
instrument make and other non-assay instrument
model, reading times, types were used in the
calibrations factors analyses
applied and their reported.
derivation,
etc. · Review of routine
standard reference
· Nature of quality material and sample blanks
control procedures suggest there are no
adopted significant analytical
( bias or preparation errors
eg standards, blanks, in the reported
duplicates, external analyses.
laboratory checks) and
whether acceptable levels · Lithium assays for the RC
of accuracy field sample duplicates
( compare well with the
ie lack of bias) and original sample and are
precision have been consistent with the style
established. of mineralisation being
evaluated. The analyses
are considered to be
representative of the
geological zones which
were
sampled.
· No field duplicates were
taken for the DD program.
· Internal laboratory QAQC
checks are reported by
the laboratory, including
sizing analysis to monitor
preparation.
· Review of the internal
laboratory QAQC suggests
the laboratory is
performing within
acceptable
limits.
· No samples were analysed
at an umpire
lab.
Verific· The verification of · Drill hole data is
ation significant intersections compiled and digitally
of by either independent or captured by company
sampli alternative company geologists.
ng and personnel.
assayi · The compiled digital data
ng · The use of twinned holes. is verified and validated
· Documentation of primary by the Companys database
data, data entry consultant before loading
procedures, data into the drill hole
verification, data database.
storage (physical and
electronic) · No specific twin holes
protocols. were drilled.
· Discuss any adjustment
to assay · Reported results are
data. compiled by the Companys
database consultant and
the Managing
Director.
· There were no adjustments
to assay
data.
Locatio· Accuracy and quality of · Drill hole collars were
n of surveys used to locate set out in UTM grid
data drill holes (collar and WGS84_Zone29N
points down-hole surveys),
trenches, mine workings · Drill hole collars were
and other locations used positioned using hand held
in Mineral Resource GPS.
estimation.
· RC and DD holes are
· Specification of the routinely surveyed for
grid system orientation at
used. approximately 50m-spaced
intervals down the hole,
· Quality and adequacy of using the Reflex EZ-TRAC
topographic electronic multi-shot
control. system
· SRTM elevation data was
used to establish
topographic control where
appropriate.
· Locational accuracy at
collar and down the drill
hole is considered
appropriate for this stage
of resource
estimation.
Data · Data spacing for · The majority of drilling
spacin reporting of Exploration is at 50m x 50m centres,
g and Results. with deeper holes at 100m
distri x 50m spacing, and some
bution · Whether the data spacing minor infill to
and distribution is approximately 50m x 25m on
sufficient to establish selected
the degree of geological sections.
and grade continuity
appropriate for the · This spacing is adequate
Mineral Resource and Ore to determine the
Reserve estimation geological and grade
procedure(s) and continuity for reporting
classifications of Mineral
applied. Resources.
· Whether sample · Compositing to 3m lengths
compositing has been has been applied for the
applied. estimation of Mineral
Resources
Orienta· Whether the orientation · Mineralisation at
tion of sampling achieves Goulamina outcrops at
of unbiased sampling of surface and the steeply
data possible structures and dipping geometry of
in the extent to which this mineralisation is
relati is known, considering the therefore
on to deposit well-defined.
geolog type.
ical · Drilling orientation has
struct· If the relationship not biased the
ure between the drilling sampling.
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 · The measures taken to · Samples are stored on
securi ensure sample site prior to road
ty security. transport by Company
personnel to the ALS
Laboratory in Bamako,
Mali.
· Chain of custody
procedures exist for the
transport of material
between ALS Laboratories
(Mali to Burkina Faso to
Perth).
Audits · The results of any · Cube Consulting undertook
or audits or reviews of a site visit during RC
review sampling techniques and drilling operations to
s data. review the sampling
techniques.
· There has been no
external audit or review
of the Companys sampling
techniques for diamond
drilling.
Section 2 - Reporting of Exploration Results
CriteriJORC Code explanation Commentary
a
Mineral· Type, reference · The reported results are
teneme name/number, location and from an area within the
nt and ownership including
land agreements or material Torakoro Permit, which is
tenure issues with third parties held 100% by Timbuktu
status such as joint ventures, Resources SARL, a Malian
partnerships, overriding subsidiary of Birimian
royalties, native title Limited
interests, historical
sites, wilderness or · Tenure is in good
national park and standing.
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.
Explora· Acknowledgment and · The area which is
tion appraisal of exploration presently covered by the
done by other
by parties. Torakoro Permit was
other explored intermittently by
partie government agencies in the
s period 1990 to 2008.
Exploration consisted of
soil sampling and mapping
for
gold.
· In 2007-2008 an
evaluation of the
commercial potential for
lithium at Goulamina was
undertaken by CSA Global
as part of the SYSMIN 7
economic development
program.
· CSA undertook mapping and
bulk sampling of the
Goulamina outcrop but did
not undertake drilling.
Bulk sampling and
preliminary processing
testwork confirmed the
viability of the pegmatite
at Goulamina to produce a
high quality chemical
grade lithium
concentrate
Geology· Deposit type, geological · Pegmatite Hosted Lithium
setting and style of Deposits are the target
mineralisation. for exploration. This
style of mineralisation
typically forms as dykes
and sills intruding or in
proximity to granite host
rocks.
· Surficial geology within
the project area typically
consists of indurated
gravels forming plateaux,
and broad depositional
plains consisting of
colluvium and alluvial to
approximately 5m vertical
depth.
· Lateritic weathering is
common away from the
Goulamina deposit and in
the broader project
area.
Drill · A summary of all · All relevant data from
hole information material to 2016
Inform the understanding of the
ation exploration results and 2017 drilling programs
including a tabulation of has been previously
the following information released to the
for all Material drill market.
holes:
o easting and northing of
the drill hole
collar
o elevation or RL (Reduced
Level - elevation above
sea level in metres) of
the drill hole
collar
o dip and azimuth of the
hole
o down hole length and
interception
depth
o 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 · In reporting Exploration · All relevant data from
aggreg Results, weighting 2016
ation averaging techniques,
method maximum and/or minimum and 2017 drilling programs
s grade truncations has been previously
( released to the
eg cutting of high grades) market.
and cut-off grades are
usually Material and
should be
stated.
· Where aggregate
intercepts incorporate
short lengths of high
grade results and longer
lengths of low grade
results, the procedure
used for such aggregation
should be stated and some
typical examples of such
aggregations should be
shown in
detail.
· The assumptions used for
any reporting of metal
equivalent values should
be clearly
stated.
Relatio· These relationships are · All relevant data from
nship particularly important in 2016 and 2017 drilling
the reporting of
between Exploration programs has been
minera Results. previously released to the
lisatio market
n · If the geometry of the
widths mineralisation with
and respect to the drill hole
interc angle is known, its
ept nature should be
length reported.
s
· 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).
Diagram· Appropriate maps and · All relevant data from
s sections (with scales) 2016
and tabulations of
intercepts should be and 2017 drilling programs
included for any has been previously
significant discovery released to the
being reported These market
should include, but not
be limited to a plan view
of drill hole collar
locations and appropriate
sectional
views.
Balance· Where comprehensive · All relevant data from
d reporting of all 2016
report Exploration Results is
ing not practicable, and 2017 drilling programs
representative reporting has been previously
of both low and high released to the market
grades and/or widths
should be practiced to
avoid misleading
reporting of Exploration
Results.
Other · Other exploration data, · Density measurements
substa if meaningful and taken by Archimedes Method
ntive material, should be (water displacement) of
explor reported including (but core samples
ation not limited to):
data geological observations; from 14 holes, all in unweat
geophysical survey hered
results; geochemical material.
survey results; bulk · Whole core and some half
samples - size and method core samples
of treatment; were
metallurgical test used for density
results; bulk density, measurements
groundwater, geotechnical , but neither coated nor
and rock characteristics; waxed.
potential deleterious or
contaminating · These measurements were
substances. used to determine the bulk
density for the Mineral
Resource.
· In addition to lithium
(as
Li
2O), all holes were assayed
for a multi-element suite
to evaluate the presence
of any potential
co-product or
contaminating
material.
Further· The nature and scale of · The Mineral Resource
work planned further work estimate will be used to
( support
eg tests for lateral
extensions or depth ongoing economic
extensions or large-scale assessments
step-out
drilling). of the key processing
parameters and estimate
· Diagrams clearly capital costs, which will
highlighting the areas of be used to define
possible extensions, subsequent phases of
including the main detailed work at the
geological Bougouni Li
interpretations and Project.
future drilling areas,
provided this information · An environmental
is not commercially consultancy
sensitive.
has completed a preliminary
social and
enviro
nmental assessment, and is
currently undertaking the
next phase of detailed
site based surveys to
facilitate a mine
permitting
process.
Section 3 - Estimation and Reporting of Mineral Resources
Criteria JORC Code explanation Commentary
Database · Measures taken to · Drilling database is
integrit ensure that data has not maintained by
y been corrupted by, for
example, transcription Birimians database
or keying errors, consultant (Rock Solid
between its initial Data Consultancy) in
collection and its use
for Mineral Resource Datashed software, look-up
estimation tables and fixed
purposes. formatting are used for
entering logging, spatial
· Data validation and sampling data for the
procedures deposit databases. Sample
used. numbers are uniquely coded
and pre-numbered bags
used. Data transfer for
downhole survey and
assaying information is
electronic via email.
These and other workflow
methods minimise the
potential of errors.
· Cube received data
directly exported from
Datashed in MS Access format
, then completed validation
checks on the database
comparing maximum hole
depths checks on all data,
duplicate numbering,
missing data, and interval
error checks using
validation rules in MS
Excel before importing
records into MS Access.
Cube then verified the
data using visual
inspection of the
drillholes in Surpac v6.7,
in 3D to identify
inconsistencies of drill
hole
traces.
Site · Comment on any site · Matt Bampton (Senior
visits visits undertaken by the Consultant - Cube
Competent Person and the Consulting) who is the
outcome of those Competent Person,
visits. conducted a site visit in
May 2016, during which
· If no site visits have time he inspected the
been undertaken indicate Project area including RC
why this is the drilling, sampling and
case. sample despatch for the
receiving laboratory.
Notes and photographs were
taken along with
discussions with site
personnel regarding
geology and mineralisation
of the deposits,
procedures, sampling and
database procedures, and
Quality Control
procedures. No major
issues were
encountered.
Geologica· Confidence in (or · The confidence in the
l conversely, the geological interpretation
interpre uncertainty of Main Zone and West Zone
tation of the
of ) the geological
interpretation of the Goulamina Pegmatites is
mineral good as a result of the
deposit. consistency of intercepts
in RC and diamond core
· Nature of the data used drilling programs, and
and of any assumptions their correlation to the
made. surface outcrops and
sub-crops of
· The effect, if any, of
alternative spodumene-rich pegmatites.
interpretations on · There is a very strong
Mineral Resource correlation between the
estimation. mineralised portion of the
pegmatite dykes and the
· The use of geology in total dyke intercept.
guiding and controlling Very little pegmatite
Mineral Resource material is not
estimation. significantly elevated in
lithium content; thus the
· The factors affecting mineralisation boundaries
continuity both of grade generally match the
and lithological boundaries of
geology. the
dykes.
· The confidence in the
geological interpretation
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News-ID 530209
Anzahl Zeichen: 88555
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"
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