Lithium Drill Results - Dorchap Project
Released
Released
Announcement PDF
ASX Release
13th September 2023
EXCELLENT LITHIUM DRILL RESULTS CONTINUE TO ESTABLISH
PROSPECTIVITY OF DORCHAP LITHIUM PROJECT
Dart Mining NL (ASX:DTM) (“Dart Mining” or “the Company”) is pleased to announce further
results from the Phase 1 diamond drilling program from the Dorchap Range Lithium project under
the Sociedad Química y Minera de Chile S.A (NYSE:SQM) $12 million SQM earn in agreement
with Dart Mining. Assays from drill holes MIDDH009 & MIDDH010 have continued to highlight
the prospectivity of the Dorchap Dyke Swarm for ongoing lithium exploration.
DORCHAP RANGE Li-Cs-Ta PEGMATITES
•
•
•
•
•
•
Drill holes MIDDH009 and MIDDH010 targeted the Boone’s Dyke within the Dorchap
Dyke Swam, one of 5 mapped pegmatite dykes drill tested during Phase 1 of drilling.
Highlight assay results included:
o MIDDH009
▪ 10.0m @ 1.08% Li2O from 313m
• Including 7.0m @ 1.38% Li2O from 315m
o MIDDH010
▪ 2.0m @ 1.07% Li2O from 302m
• Including 1.0m @ 1.38% Li2O from 303m
Results to date have been received from 5 out of 12 holes drilled across 5 dykes. All drill
holes returned to date have shown elevated levels of lithium mineralisation.
Assay results returned continue to support the prospectivity of the Dorchap Range Li-CsTa Pegmatite Dyke swarm to host significant levels of Lithium mineralisation.
Dart Mining has granted SQM, the right, to sole fund exploration expenditure totalling
A$12million.
During the first earn in period, SQM may earn an initial 30% interest in the Dorchap Lithium
Project by sole funding exploration expenditure of A$3million
Chairman, James Chirnside commented: “The outstanding results from Holes 9 and 10 confirm the
growing potential of the Dorchap Dyke swarm as an exciting new region for lithium exploration. The
width and grades intersected are very solid and adds further to Dart’s cumulative knowledge of the
Dorchap Lithium project.”
Visit our webpage:
www.dartmining.com.au
Find us on LinkedIn:
Dart Mining NL
For more information, contact:
James Chirnside, Managing Director
Email: jchirnside@dartmining.com.au
Phone: +61 447 447 613
Dart Mining NL
ABN: 84 119 904 880
412 Collins Street
Melbourne VIC 3000
1|Page
Discussion of Drilling Results
The results from drill holes MIDDH009 and MIDDH010 continue to develop the understanding of the
Dorchap Range Lithium exploration project and build on the previously reported results from holes
MIDDH001, MIDDH002 and MIDDH005 into the Eagle and Fergusson pegmatite dyke targets (Dart Mining
ASX June 2023). The drilling clearly highlights the prospectivity of the Dorchap Dyke Swarm to host
significant grades of Lithium Mineralisation.
The narrow interval of the peak assay result from MIDDH002 (0.81m @ 1.2% Li2O) and the broad
exomorphic halos reported from the Eagle Dyke drilling (Dart Mining ASX June 2023) were interpreted to
have resulted from the complex structural history of dyke emplacement. Dart Mining geologists currently
interpret that syn-emplacement to post-emplacement shearing (extensive at the Eagle Dyke) has generated
mylonitic (sheared) textures that likely caused partial recrystallisation of the pegmatite and re-mobilised
the contained lithium from the dyke into surrounding sediments. This process may be responsible for the
broader, but overall lower grade lithium intersections at Eagle dyke. In contrast, structural and lithological
logging of drill holes MIDDH009 and MIDDH010 from the Boones dyke target (Figure 1,2 and 3) show only
narrow zones of mylonitic textures within the dykes. This represents a significant increase in the proportion
of large primary crystals of lithium minerals inbound from the dyke margins with a consequent marked
increase in reported lithium grades. The structural evolution of the region appears critical to emplacement
and development of the pegmatite dykes and is a critical, ongoing focus for Dart Mining moving forward.
MIDDH009 intersected 10m @ 1.08% Li2O (See Appendix 1) from 313m (including 7m @ 1.38% Li2O) from
the western dyke structure at Boones (Figure 1 and 3). The Boones dyke appears to dip steeply (840) to the
west and shows geological continuity extends below 200m depth from surface. The true width of the
pegmatite based on surface mapping and the current drill interpretation is between 5 – 13m with an open
strike extent of some 300m at surface. The drill intersection assay highlight is approximately 5m in true
width with the drill hole orientation approximately perpendicular to the strike of the pegmatite.
MIDDH010 intersected 2m @ 1.07% Li2O (See Appendix 1) from 302m from the western dyke, some 90m
along strike from the western dyke intersection in MIDDH009 (Figure 2 and 3). Geological continuity
extends below 175m depth from surface with the true width of the pegmatite drill intersection being
approximately 5m. The drill intersection orientation is approximately perpendicular to the strike of the
dyke with the assay highlight having a true width of approximately 1.1m.
Sampling and logging of pegmatite intersections in the remaining 7 drill holes of the Phase 1 drill program
is complete. Further assay results are expected over the coming 4-6 weeks and will be reported as results
come to hand.
2|Page
BOONES SECTION – MIDDH009
Figure 1 - Cross-section interpretation of drill hole MIDDH009 with assay highlights from Boones Dyke.
3|Page
BOONES SECTION – MIDDH010
Figure 2 - Cross-section interpretation of drill hole MIDDH010 with assay highlights from Boones Dyke.
4|Page
Figure 3 – Drill hole location plan MIDDH009 and MIDDH010 at Boones Dyke.
Dorchap Lithium Project Summary
Dart Mining geologists first identified the lithium prospectivity of pegmatite dykes in the Dorchap Range in
2016 and set about acquiring exploration leases across the region (Dart Mining ASX May 2016; Dart Mining
ASX August 2016). These are the first recorded lithium pegmatites identified in Victoria, and are believed to
have been sourced from the nearby Mount Wills Granite. A regional sampling program consisting of 826
samples has identified a strong fractionation trend across the Dorchap Range, resolving a 20×12 km zone of
strongly fractionated pegmatites bearing enriched Li, Cs, Ta, Be and Sn mineralisation (Dart Mining ASX July
2021).
Dart Mining’s chip sampling program has seen some rewarding results, including: 16m at >530 ppm Cs2O,
0.32% Li2O and 104 ppm Ta2O5, and grab samples at 1.57% Li2O and 0.1% Ta2O5 at the Bluejacket Dyke in
Glen Wills, along with 10m at 0.95% Li2O from the Eagle Dyke and 10m at 1.38% Li2O from the Holloway Dyke
(Dorchap Range), and 10m at 1.22% Li2O from Scrubby Dyke, 1m at 838 ppm Cs2O and 0.46% SnO2, and a
grab sample at 9.98% SnO2 from elsewhere in the Dorchap Range (Dart Mining ASX July 2021). The initial,
short drilling program in 2019 has been followed by an airborne LiDAR mapping program in early 2021 (Dart
Mining ASX March 2021), which has allowed additional, detailed mapping of pegmatite dykes that were
previously overlooked in pockets of dense bush across the Dorchap Range.
5|Page
Figure 4 – Location of Dart Mining’s tenements and the Dorchap Lithium / LCT pegmatite exploration project in
Northeast Victoria.
––– END –––
For more information contact:
James Chirnside
Managing Director
Dart Mining NL
jchirnside@dartmining.com.au
+61 447 447 613
Peter Taylor
Investor Relations
NWR Communications
peter@nwrcommunications.com.au
+61 412 036 231
About Dart Mining
Dart Mining (ASX: DTM) has the aim of evaluating and developing several historic goldfields, as well as
substantiating a new porphyry province in Northeast Victoria. The area is prospective for precious,
base, and strategic metals. These include Lithium, Gold, Silver, Copper, Molybdenum, Zinc, Tungsten,
Tin, Tantalum, and a host of other important minerals. Dart Mining has built a strategically placed gold
exploration footprint in the Central and Northeast regions of Victoria, where historic surface and
alluvial gold mining indicates the existence of potentially significant gold endowment.
6|Page
Additional JORC Information
Further details relating and information relating to Dart Mining’s Strategic and Technology metals
exploration programs can be found in Dart Mining’s ASX announcements:
22nd June 2023: “First Assay Results from Phase 1 Drilling”
6th October 2021: “Lithium Drilling Update”
27th October 2021: “LiDAR Points Towards Increase in Lithium Pegmatites”
21st July 2021: “Strategic & Technology Metals”
18th March 2021: “LiDAR Data Acquisition over Strategic Projects”
10th February 2021: “Exploration Strategy & Tenement Status Update”
19th June 2019: “Lithium Project Update”
19th March 2019: “Lithium Exploration Drilling to Commence at the Dorchap Project”
14th November 2018: “Lithium Exploration Update”
10th September 2018: “Exploration Update: Dorchap Lithium Project”
10th May 2018: “Significant Lithium Mineralisation in Pegmatites of the Dorchap Range, Victoria”
21st December 2017: “Lithium Exploration Update”
6th October 2017: “Lithium Tenements & Prospects”
3rd April 2017: “Lithium Exploration Update”
3rd April 2017: “Exploration Program Confirms Significant Lithium Pegmatites in NE Victoria”
6th February 2017: “Acquisition of Tenement Package”
9th August 2016: “Company Update: Lithium”
1st June 2016: “Exploration Tenement Update”
18th May 2016: “Tenement Application Update”
Additional information on Dart Mining’s other recent and current exploration activities can be found in:
26th May 2022: “Granite Flat Drilling Completion”
15th February 2022: “Granite Flat Cu-Au Diamond Drilling Update”
11th October 2021: “Granite Flat Diamond Drilling Update”
29th September 2021: “Multiple Drill Targets Identified at Granite Flat”
14th September 2021: “Encouraging Copper-Gold Drill Results from Granite Flat”
27th May 2021: “Initiation of Geophysical Surveys at Granite Flat”
11th May 2021: “Diamond Drilling Program for Copper-Gold Mineralisation Commences”
18th March 2021: “LiDAR Acquisition over Strategic Projects”
8th March 2021: “Granite Flat High-Grade Gold, Silver, Copper Drill Results”
27th October 2020: “Orogenic Gold and Porphyry Prospectivity, Mitta Mitta, NE Victoria”
22nd September 2021: “Mt Elmo Goldfield Mineralisation”
6th April 2021: “Strong Gold Mineralisation Intercepted at Rushworth”
16th February 2021: “Sandy Creek Significant Gold Mineralisation”
19th October 2020: “Drill Results Reveal High-Grade Gold”
7|Page
Competent Person’s Statement
The information in this report that relates to Exploration Results has been compiled by Mr Owen
Greenberger who is the full-time Head of Exploration for Dart Mining, and verified by Mr Dean Turnbull,
a Competent Person who is a Member of the Australian Institute of Geoscientists. Mr Turnbull is a
consultant and Non-executive Director of Dart Mining. Mr Turnbull has sufficient experience that is
relevant to the style of mineralisation and type of deposits under consideration and to the activity being
undertaken 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”. Mr Turnbull consents to the
inclusion in the report of the matters based on his information in the form and context in which it
appears.
Forward-Looking Statement
Certain statements contained in this document constitute forward-looking statements. Forwardlooking statements include, but are not limited to, Dart Mining’s current expectations, estimates and
projections about the industry in which Dart Mining operates, and beliefs and assumptions regarding
Dart Mining’s future performance. Such forward-looking statements are based on a number of
estimates and assumptions made by the Company and its consultants in light of experience, current
conditions and expectations of future developments which the Company believes are appropriate in
the current circumstances. When used in this document, words such as; “anticipate”, “could”,
“intends”, “estimate”, “potential”, “plan”, “seeks”, “may”, “should”, and similar expressions are
forward-looking statements. Although Dart Mining believes that its expectations presented in these
forward-looking statements are reasonable, such statements are subject to known and unknown risks,
uncertainties and other factors, which may cause the actual results, achievements and performance of
the Company to be materially different from the future results and achievements expressed or implied
by such forward-looking statements. Investors are cautioned that forward-looking information is no
guarantee of future performance and accordingly, investors are cautioned not to place undue reliance
on these forward-looking statements.
8|Page
APPENDIX 1
Table 1: Significant Intersections for MIDDH009 and MIDDH010.
Drill Hole
MIDDH009
From (m)
To (m)
Interval (m)
Li2O (%)
313
323
10
1.08
315
302
322
304
7
2
1.38
1.07
303
304
1
1.38
Including:
MIDDH010
Including:
Table 2: Collar details for holes covered in the release.
Drill Hole
Dyke /
Target
Easting
(MGA Z55)
Northing
(MGA Z55)
RL
(m)
Azimuth
(Grid)
Dip
Total Depth
(m)
MIDDH009
Boones
524,657.0
5,957,946.9
951.8
248
-55
396.6
MIDDH010
Boones
524,586.0
5,958,069.3
961.2
233
-55
360.7
9|Page
APPENDIX 2
TENEMENT STATUS
Table 1.1. TENEMENT STATUS
Tenement
Number
Name
Licence Type
Tenement
Status
MIN006619 Mountain View Project 2
RL006615 Fairleys Project 2
RL006616 Unicorn Project 1&2
EL5315
Mitta 4
EL006016
Rushworth 4
EL006277
Empress
EL006300
Eskdale 3
EL006486
Mt Creek
EL006764
Eskdale
EL006861
Buckland
EL006865
Dart Goldfields
EL006866
Cudgewa
EL006994
Rushworth
EL007007
Union
EL007008
Buckland West
EL007099
Sandy Creek
EL007170
Berringama
EL007425
Deddick
EL007426
Walwa
EL007428
Boebuck
EL007430
Buchan
EL007435
Goonerah
EL007754
Tallandoon
EL008161
Colbinannin
Mining Licence
Retention Licence
Retention Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
Exploration Licence
EL9476
Exploration Licence
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Granted
Application
Application
Granted
Competing
Application
Granted
EL9516
Exploration Licence
Granted
Area (km2)
Unless
specified
223.9 (ha)
340.2 (ha)
23116.27 (ha)
148
32
87
96
116
170
414
567
508
190
3
344
437
27
341
499
355
88
85
185
Interest
Location
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
NE Victoria
NE Victoria
NE Victoria
NE Victoria
Central Victoria
NE Victoria
NE Victoria
NE Victoria
NE Victoria
NE Victoria
NE Victoria
NE Victoria
Central Victoria
NE Victoria
NE Victoria
NE Victoria
NE Victoria
Gippsland
NE Victoria
NE Victoria
Gippsland
Gippsland
NE Victoria
100%
Central Victoria
100%
100%
New South
Wales
New South
Wales
All tenements remain in good standing as of 31 August 2023.
NOTE 1: Unicorn Project area subject to a 2% NSR Royalty Agreement with Osisko Gold Royalties Ltd dated 29 April 2013.
NOTE 2: Areas subject to a 1.5% Founders NSR Royalty Agreement.
NOTE 3: Areas are subject to a 1.0% NSR Royalty Agreement with Minvest Corporation Pty Ltd (See DTM ASX Release 1 June 2016).
NOTE 4: Areas are subject to a 0.75% Net Smelter Royalty on gold production, payable to Bruce William McLennan.
10 | P a g e
Figure 1.1: Location of Dart Mining’s exploration properties in Northeastern Victoria.
11 | P a g e
APPENDIX 3
JORC CODE, 2012 EDITION – TABLE 1
SECTION 1 SAMPLING TECHNIQUES AND DATA
Criteria
JORC Code Explanation
Sampling techniques
•
•
•
•
Nature and quality of sampling (e.g. cut channels, random chips, or
specific specialised industry standard measurement tools appropriate to
the minerals under investigation, such as down hole gamma sondes, or
handheld XRF instruments, etc.). These examples should not be taken as
limiting the broad meaning of sampling.
Include reference to measures taken to ensure sample representivity and
the appropriate calibration of any measurement tools or systems used.
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 (e.g. ‘reverse circulation drilling was used to obtain 1 m
samples from which 3 kg was pulverised to produce a 30 g charge for
fire assay’). In other cases more explanation may be required, such as
where there is coarse gold that has inherent sampling problems.
Unusual commodities or mineralisation types (e.g. submarine nodules)
may warrant disclosure of detailed information.
Commentary
•
•
•
•
•
•
•
•
•
•
•
HQ diamond drill core was drilled using triple tube method to retain maximum
sample recovery.
Diamond core was sampled as half core at 1m intervals or to geological or
mineralogical boundaries, where relevant, to a minimum sample size of 0.2m and
a maximum of 1.5m. To ensure representative sampling, half core samples were
always taken from the same side of the core.
Only pegmatite dykes and contact zones are sampled due to the target
mineralisation.
In interpreted unmineralised, mineralised or altered zones, samples were not
submitted for analysis.
Samples submitted to ALS were whole sample crushed to 70% <2mm, riffle/rotary
split off 1 kg, pulverise to >85% passing 75 microns, then assayed by ALS methods
ME-MS61 (0.25g sample aliquot by four-acid digest and ICP-MS and ICP-AES
analysis), ME-ICP89 and ME-MS91.
Certified Reference Materials OREAS 750, OREAS 751, OREAS 752, OREAS 753, and
OREAS 999 as well as CRM blank OREAS C27c were inserted every 10 samples as
part of a QA/QC system.
All-drill related data are referenced to the original ASX report by date published. All
details appear in the original report.
Chip samples are taken continuously perpendicular to the general strike of
mineralised structures in outcrop, and large samples (4 – 7kg) are taken where
possible to provide a more representative sample. The chip samples are of
adequate quality to be indicative of the area sampled.
Grab samples were collected from the outcrop over a small area (<1 – 5m in
diameter). The grab samples are generally small (ie. <7kg) and represent the local
area only, sampling only tests a small aerial extent, and are not considered as
being representative of the outcrop. The grab samples are of adequate quality to
be representative of the small area sampled and approximate the sampled in situ
mineralisation.
Rock samples are dried, crushed and whole sample pulverized and riffle split. A
sample aliquot (25g) is taken for analysis. Lithium has been analysed by ALS
Method ME-MS61– a four acid digest assay technique for total digestion.
Individual <7kg chip / grab samples were collected from outcrop, individual chips
12 | P a g e
Drilling techniques
•
Drill type (e.g. core, reverse circulation, open-hole hammer, rotary air
blast, auger, Bangka, sonic, etc.) and details (e.g. core diameter, triple or
standard tube, depth of diamond tails, face-sampling bit or other 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
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.
•
•
making up the sample were <40mm and chipped from a random selection of the
mineralisation to generate a representative average sample of the mineralisation
targeted.
• Semi-quantitative XRD results we analysed from the same sample pulp analysed for
multi-element geochemistry.
• X-ray diffraction traces were obtained from the samples with a Panalytical Aeris
Research Powder Diffractometer. Operating conditions were 40kV/15mA, Fe Kß
filter, step scan 0.01/29 secs˚2Ɵ at, 1/4˚ divergence and a 1.0˚ ant-scatter slit. Scan
range was 5° to 90° 2Ɵ. Phases were identified by computer search/match of the
COD and ICDD 2022 Databases. Quantitative results have been determined with full
pattern Rietveld refinement software.
• 12 diamond holes drilled by DDH1 Ltd across the mineralised structures.
• 3 RC drillholes were drilled by EDrill Pty Ltd limited over two mineralised dyke
structures.
• Diamond Drilling (Core) is of HQ3 (63.5mm diameter) from surface. Drill holes are
angled, and core is orientated (Reflex Tool) to allow structural interpretation (not
yet completed)
• Face sampling 5.25” hammer Reverse Circulation drilling
• Holes surveyed using an Trushot downhole camera, both open hole and within
rods (for dip). Verified using clinometer and compass survey of rods.
• Face sampling 5 ¾’ RC drilling
• Each 2m composite sample was weighed and results recorded to monitor sample
recovery – a high average recovery was achieved in all holes.
• Experienced geologists ensured best drilling and sampling practices were
maintained.
• Experienced drillers ensured best drilling and sampling practices were maintained,
including pausing drilling between sample intervals to ensure all sample is out of
the system and regular cleaning of the sampling equipment.
• There was no observable relationship between sample recovery and grade.
•
Drill core recovery is recorded for each drill interval recorded by the drill
contractor. The drilled interval (recorded on core blocks) and the recovered
interval (measured during logging) are recorded in the company drill log database
and recovery is calculated as a percentage.
•
Drilling techniques are designed to maximise core recovery
•
No analysis of sampling has been carried out to date to establish if any relationship
between sample recovery, grade and any possible sample bias may exist.
• Drill chips were geologically logged at 1m intervals for lithology (including quartz
types and percentages), alteration and mineralisation, and drilling conditions.
• Representative chips from each metre were collected in chip trays. Chip trays were
photographed.
• 100% of the drilling was logged.
13 | P a g e
Logging
•
•
•
Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support appropriate Mineral
Resource estimation, mining studies and metallurgical studies.
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.
If non-core, whether riffled, tube sampled, rotary split, etc. and whether
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
procedures used and whether the technique is considered partial or
total.
For geophysical tools, spectrometers, handheld XRF instruments, etc.,
the parameters used in determining the analysis including instrument
make and model, reading times, calibrations factors applied and their
derivation, etc.
Nature of quality control procedures adopted (e.g. standards, blanks,
duplicates, external laboratory checks) and whether acceptable levels of
accuracy (i.e. lack of bias) and precision have been established.
•
•
•
•
•
•
Drill core initial summary lithology logging is carried out to allow subsequent hole
planning and to track hole geology against hole plan. Detailed geological logging of
all drill core will follow and include recording of recovery, weathering, lithology,
alteration, mineralisation and RQD. All drill core will be photographed prior to
sampling. This logging is qualitative.
Drill chips were geologically logged at 1m intervals for lithology (including quartz
types and percentages), alteration and mineralisation, and drilling conditions.
Representative chips from each metre were collected in chip trays. Chip trays were
photographed.
100% of the drilling was logged.
All Diamond core was cut longitudinally using a brick saw with sampling of one half
of the core, with the remaining core kept as reference.
No assessment of the appropriateness of the diamond core sampling method has
been undertaken yet.
RC samples were collected from a riffle splitter mounted directly beneath the
cyclone.
Samples from all intervals were collected as 1m composite samples at the splitting
stage at the drill site.
12.5% of the sample was split with the remainder collected in residue bags.
The majority of samples were dry, there were four wet samples collected across the
whole drill program.
The sampling procedure is appropriate for the mineralisation style of large
pegmatite dykes and is better described in Dart Mining ASX 19th June 2019.
The samples were sent to ALS Laboratories, Pooraka, SA.
XRD results were obtained from McKnight Mineralogy, Ballarat, Victoria.
Semi-quantitative XRD results we analysed from the same sample pulp analysed for
multi-element geochemistry.
Samples were submitted to ALS Chemex and analysed for a suite of trace elements
using ALS Methods ME-ICP89 and ME-MS91 (a peroxide leach is considered a total
extraction technique for lithium). These techniques are appropriate and
considered a total extraction technique for key metals Rb, Nb, Sn, Nb, Ta, Cs and Li.
Samples were whole sample crushed, pulverised to P85 at 75um and assayed by
ALS methods ME-ICP89 and ME-MS91.
Lithium pegmatite standards OREAS 147, OREAS 148, and OREAS 149, as well as
rhyodacite blanks (OREAS C27e) were included every 10 samples as part of the
internal QA/QC system. All results are within expected confidence limits.
ALS conducted their own internal laboratory checks.
Laboratory blanks, standards are reviewed per batch to monitor accuracy and
precision.
For rock chip samples, due to the reconnaissance nature of the sampling, no QAQC
procedures were adopted other than internal laboratory CRM.
14 | P a g e
•
Verification of
sampling and assaying
•
•
•
•
The verification of significant intersections by either independent or •
alternative company personnel.
•
The use of twinned holes.
•
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 down- •
hole surveys), trenches, mine workings and other locations used in Mineral
Resource estimation.
Specification of the grid system used.
•
Quality and adequacy of topographic control.
•
•
•
•
Data spacing and
distribution
•
•
Data spacing for reporting of Exploration Results.
•
Whether the data spacing and distribution is sufficient to establish the
degree of geological and grade continuity appropriate for the Mineral •
Resource and Ore Reserve estimation procedure(s) and classifications
XRD data is semi-quantitative which is considered appropriate at this stage of
exploration.
Sample duplicates (quarter sawn) are submitted every 20th sample.
Geological logging is completed by experienced geologists
The laboratory supplies all assay data as an export to a CSV file. The raw data is
edited to separate all duplicates and CRM results into a QA/QC tab in the CSV file
and reviewed.
Verification of significant intersections were made by alternative company
personnel.
No independent review of assay data has been carried out.
Geological data were logged onto paper and transferred to a spreadsheet and
checked.
Electronic-only assay data is imported into a spreadsheet from the laboratory’s
electronic data.
No holes were twinned at this early exploration stage.
Lithium analysis reports Li%, Li2O (%) is derived by using a conversion factor:
Li2O = Li x 2.153
Tantalum analysis (where reported) Ta (ppm) Ta2O5 (ppm) is derived by using a
conversion factor:
Ta2O5 = Ta x 1.2211
The location of drill hole collars and geological mapping confirmed using a Garmin
GPSMAP 62s GPS, set to MGA94 Grid Datum (Zone 55) with topographic control
taken from the GPS. Accuracy is variable but maintained <5m during the mapping
process with constant visual quality assessment conducted.
Hand-held GPS was used to survey a control point and drill hole collar positions are
then measured by tape and compass relative to the GPS control. The accuracy
between holes is <0.5m but absolute accuracy is relative to the original GPS control
point at <5m.
Down hole, multi-shot surveys were taken at a nominal 30 m interval where
possible in an open hole (percussion) or in rod (diamond drilling). Where the
percussion hole was suspected to have collapsed a downhole, multi-shot survey
was conducted within the rods to determine dip.
All maps, plans and data are on an MGA datum and GDA94 zone 55 projection.
Elevation is established from the GPS control point.
Mine workings were located using GPS control and then tape and compass
surveyed for underground development.
Drill sites were restricted to existing tracks. It was not intended to est
Share your feedback
Discover