Significant Base Metals Discovery Confirmed at Burning's
Released
Released
Announcement PDF
27 March 2024
Significant Base Metal Discovery Confirmed at
Durnings with Massive Sulphides in Diamond Drilling
Follow-up RC and diamond drilling intersects significant zones of lead-zinc-copper mineralisation
Highlights:
•
Follow-up diamond drilling has intersected multiple zones of massive sulphide galenasphalerite-chalcopyrite (lead-zinc-copper) mineralisation at the Durnings Prospect, part of the
100%-owned Lachlan Project in NSW. Note 1.
•
Diamond hole DRRCD0019, drilled adjacent to the discovery hole DRRCD006, has intersected
two zones of strong galena-sphalerite-chalcopyrite (lead-zinc-copper) mineralisation:
o
Upper Zone – 26.8 metres containing massive, semi-massive, matrix and laminated
galena-sphalerite and minor chalcopyrite from 201.3m down-hole, including:
▪ 3.5m of semi-massive, matrix and laminated galena-sphalerite and minor
chalcopyrite from 202m down-hole; and
▪ 1.6m of massive, matrix and laminated galena-sphalerite and minor chalcopyrite
from 224.5m down-hole, including:
▪ A 1.0m zone of massive galena and sphalerite.
o
Deep Zone – 25.1 metres of massive, semi-massive, matrix and blebby galenasphalerite and chalcopyrite from 374.0m down-hole in an extensively altered quartz
breccia zone, including:
▪ 10.0m of quartz sulphide breccia veining including bands of massive galena,
sphalerite and chalcopyrite up to 30cm length from 374.0m down-hole; and
▪ 9.1m complex zone of quartz sulphide breccia veining including bands of
massive galena, sphalerite and lesser chalcopyrite up to 10cm length from 390m.
o
The Deep Zone is associated with a large chargeable feature re-modelled from a historical
Pole-Dipole Induced Polarisation (PDIP) survey.
•
An additional 11 Reverse Circulation drill-holes have been completed to test along strike of the
discovery holes DRRC0006 and DRRCD0019. First assays are expected in 2-3 weeks.
•
These RC holes have successfully intersected the Upper Zone target with broad intersections
of anomalous S, Zn, Pb and Cu mineralisation recorded by pXRF field analysis. Note 1.
•
Ongoing diamond drilling will test Deep Zone geophysical targets over the next few weeks.
Note 1. Cautionary Statement
Determination of mineralisation has been based on geological logging, visual observation and confirmation using a pXRF machine. No
pXRF results are reported, however the tool was used to verify the mineralisation. pXRF readings may not be representative of the average
concentrations of the elements of interest in a certain volume of material. As such, pXRF results are used as a logging/sampling verification
tool only. Laboratory analysis will be required to determine the level of mineralisation contained in the mineralised zones. Visual estimates
of mineral abundance or anomalism recorded on pXRF should never be considered a proxy or substitute for laboratory analyses where
concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding
impurities or deleterious physical properties relevant to valuations.
Talisman Mining Limited (ASX: TLM, Talisman) is pleased to advise that it has intersected multiple
zones of sulphides in initial diamond (DD) drilling, part of the follow-up program of Reverse
Circulation (RC) and DD drilling that commenced recently at the Durnings Prospect, part of its
100%-owned Lachlan Project in central NSW.
In addition to the significant mineralised zones logged in the first follow-up diamond hole,
DRRCD0019, several step-out RC holes have potentially intersected the Upper mineralised zone
along strike and recorded anomalous sulphur (S), zinc (Zn), lead (Pb) and copper (Cu) readings from
pXRF field analysis. Note 1. Collectively, the results show that Durnings is emerging as a significant
greenfields base and precious metal discovery.
Durnings is located approximately 25km north of Condobolin and 35km south-east of the Company’s
Rip n Tear discovery within the Lachlan Project area (see Figure 1).
High-grade base and precious metal results were previously reported (see ASX announcements 14 December
2023, 9 January 2024) from Talisman’s initial 1,710m broad-spaced 6-hole RC drilling program
(DRRC0006 to DRRC0011), completed in November 2023.
Figure 1 – Lachlan Project location plan highlighting prospect locations along the Canbelego-Mineral Hill Volcanic Belt.
Figure 2 – Durnings RC drilling and follow-up RC and diamond drilling over GAIP survey image. See Figure 10 for Cross Section A-A’.
(See ASX announcements 14 December 2023, 9 January 2024).
Geology and Mineralisation
The Durnings prospect is characterised by felsic volcanic rocks of the Mineral Hill Volcanic sequence
(MHV). The MHV of Silurian-Devonian age, has been mapped within Talisman’s tenure south of
Mineral Hill and contains four prospects: Boona, Kaolin Shaft, Hilltop and Durnings in the central part
of the sequence. The MHV package extends to Gunawyle in the north and Brooklyn in the south, a
distance of 15km. Underlying the MHV sequence is the Ordovician age Girilambone Formation (see
Figure 3).
A series of NW-SE oriented shear zones and faults straddle the sequence and are interpreted as
tapping buried Devonian age granite intrusions which outcrop at locations such as Wilmatha and are
the source of the heat, fluids and metals for the mineralisation at both Mineral Hill, Durnings and
other related prospects in the area.
Figure 3 – Durnings area geology plan highlighting prospect locations along the prospective Mineral Hill Volcanic Belt.
Results
Drilling in DRRCD0019 consists of an RC pre-collar of 100m and HQ diamond core from 100m to
452.9m down-hole. The hole was drilled at 70 degrees towards grid west to intersect the target zone
defined by DRRC0006 at approximately 200m down-hole and the deeper Pole-Dipole Induced
Polarisation (PDIP) geophysical target at approximately 350m down-hole.
The deeper zone target is coincident with a broad chargeability model located at approximately 350m
below surface from re-processed Pole-Dipole Induced polarisation (PDIP) survey data over the
Durnings and Boona areas (see Figure 10).
The diamond core in DRRCD0019 intersected two significant zones of sulphide mineralisation
containing galena, sphalerite and chalcopyrite in various styles and forms. These include:
▪
Upper Zone – 202m to 205.5m – 3.5m down-hole (see Figure 4, Table 1 and Note 1):
o
Disseminated, blebby, matrix and stringer sulfides (pyrite, pyrrhotite sphalerite,
galena, chalcopyrite) within weakly sheared and brecciated carbonate and chlorite
altered very fine-grained volcaniclastics.
Tray 32 – 201.1m to 204.1m
Tray 33 – 204.1m to 207.6m
Figure 4 – Upper mineralised zone DRRCD0019. Refer Table 1 for Mineral abundance estimates.
▪
Upper Zone – 224.5m to 226.1m – 1.6m down-hole (see Figure 5, Table 1 and Note 1):
o
Disseminated, blebby pyrite, pyrrhotite, galena, sphalerite, chalcopyrite with a
massive sulfide zone (224.5m-225.5m) dominated by galena and sphalerite, within
weakly sheared and brecciated carbonate chlorite altered very fine-grained
volcaniclastics.
▪
The Upper Zone intersected in DRRCD0019 is adjacent to and visually similar to the
mineralisation previously intersected in the discovery hole DRRC0006, which assayed:
o
42m at 2.3% Pb, 25.3g/t Ag, 1.3% Zn, 0.09% Cu, 0.43g/t Au from 246m to end-ofhole (EOH) at 286m, including:
o
6m at 10.3% Pb, 126g/t Ag, 3.5% Zn, 0.4% Cu and 1.93g/t Au from 274m to 280m
(see ASX announcements 14 December 2023, 9 January 2024)
Massive sulfides
Tray 38 – 221.3 m to 224.6m
Massive sulfides
Tray 39 – 224.6m to 228.1m
q
Figure 5 – Upper Mineralised Zone DRRCD0019. Refer Table 1 for mineral abundance estimates.
▪
Deep Zone – 374m to 399.1m (see Figure 6, Figure 7, Table 1 and Note 1):
o
25.1 metre zone of quartz sulphide breccia mineralisation subvertical, discordant
to bedding.
o
Two zones of 10.0m and 9.1m down-hole width – Quartz sulphide breccia with
disseminated, blebby galena, chalcopyrite, sphalerite and pyrrhotite within
Girilambone sediments. See Figure 6 and Figure 7.
o
Several zones of massive galena, sphalerite and chalcopyrite, 10cm to 30cm downhole.
o
Chalcedonic vein textures with quartz fragments. Interstitial chalcopyrite and pyrite in
blebs. See Figure 8 and Note 1.
Tray 85 – 372.6m to 375.8m
Tray 86 – 375.8m to 379.1m
Tray 87 – 379.1m to 382.3m
Tray 88 – 382.3m to 385.6m
Figure 6 – Deep Mineralised Zone DRRCD0019 – Quartz breccia with Galena, Chalcopyrite and Pyrrhotite from 374m to 384m
down-hole. Refer Table 1 for Mineral abundance estimates.
Tray 90 – 389m to 392.4m
Tray 91 – 392.4m to 395.8m
Tray 92 – 395.8m to 399.4m
Figure 7 – Deep Mineralised Zone DRRCD0019 – Quartz breccia with Galena, Sphalerite and Chalcopyrite from 390m to 399.1m
down-hole. Refer Table 1 for Mineral abundance estimates.
Note 1. Cautionary Statement
Determination of mineralisation has been based on geological logging, visual observation and confirmation using a pXRF machine. No
pXRF results are reported however the tool was used to verify the mineralisation. pXRF readings may not be representative of the average
concentrations of the elements of interest in a certain volume of material. As such, pXRF results are used as a logging/sampling verification
tool only. Laboratory analysis will be required to determine the level of mineralisation contained in the mineralised zones. Visual estimates
of mineral abundance or anomalism recorded on pXRF should never be considered a proxy or substitute for laboratory analyses where
concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding
impurities or deleterious physical properties relevant to valuations.
Figure 8 – Deep Mineralised Zone DRRCD0019 – Mineralisation styles and textures 374m to 399.1m down-hole. Upper Panel (field
of view 0.27m) – Massive sphalerite(25%), quartz breccia(25%), galena(50%). Lower Panel (Field of view 16cm) – Chalcedonic vein
textures with interstitial Chalcopyrite (2%-3%), pyrite (3%-5%).
Information relating to the observed sulphide intercepts:
1. The nature of the sulphide minerals:
•
Fine-grained massive sulphide
•
Fine-grained semi-massive sulphide
•
Fine-grained disseminated sulphide
•
Coarse grained clustered sulphide
•
Coarse grained blebby sulphides
•
Sulphide as vein and breccia zone matrix fill
•
Sulphide in stringy shears and bands
2. Minerals observed:
•
The minerals visually observed in the drill core are as follows:
• Chalcopyrite, Galena, Sphalerite, Pyrite, Pyrrhotite.
3. Estimates of abundance of minerals observed are provided below:
Hole ID
From
(m)
To
(m)
Length
(m)
Min Style
(Major)
Min Style
(Minor)
DRRCD00019
198
202
4.0
Veins
Disseminated
DRRCD00019
202
205.5
3.5
Veins
Matrix
DRRCD00019
205.5
217.4
11.9
DRRCD00019
217.4
224.5
7.1
Veins
DRRCD00019
224.5
226.1
1.6
Massive
DRRCD00019
226.1
242.3
16.2
Blebby
Veins
DRRCD00019
242.3
259
16.7
Blebby
Veins
1-2%
Clusters
1-2%
1-2%
Chalcopyrite
1%
Galena
Sphalerite
0.5%
1%
5%
10%
Disseminated
Stringy
1%
4%-5%
1%
0.1-1%
70%
20%
9-10%
1-2%
1-2%
310.4
51.4
Veins
DRRCD00019
310.4
331.6
21.2
Clusters
0.1%
0.1%
Clusters
0.1%
0.1%
Veins
0.2%
0.1%
2-3%
7-10%
DRRCD00019
359.6
359.6
374
28.0
14.4
DRRCD00019
374
384
10.0
Semimassive
Veins
DRRCD00019
384
390
6.0
Clusters
Veins
0.2%
Breccia
3-5%
DRRCD00019
390
399.1
9.1
Semimassive
15%
0.1-1%
259
331.6
Pyrrhotite
0.1%-1%
DRRCD00019
DRRCD00019
Pyrite
1-2%
0.5-1%
2%
1%
3%
1%
Table 1 – Summary sulphide mineral abundance logging from DRRCD0019. Referenced to Figures 4, 5, 6, 7, and 8.
Note 1. Cautionary Statement
Determination of mineralisation has been based on geological logging, visual observation and confirmation using a pXRF machine. No
pXRF results are reported however the tool was used to verify the mineralisation. pXRF readings may not be representative of the average
concentrations of the elements of interest in a certain volume of material. As such, pXRF results are used as a logging/sampling verification
tool only. Laboratory analysis will be required to determine the level of mineralisation contained in the mineralised zones. Visual estimates
of mineral abundance or anomalism recorded on pXRF should never be considered a proxy or substitute for laboratory analyses where
concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding
impurities or deleterious physical properties relevant to valuations.
The Company has recently completed follow-up RC drilling at Durnings comprising 11 holes,
DRRC0012 to DRRC0022, for 2010 metres, which were designed to provide an initial assessment
of potential parallel mineralised zones and the strike extent of the Upper Zone of mineralisation
intersected in DRRC0006 and DRRCD0019. Two additional sections located 80m north and 80m
south of the central section have been drilled. See Figure 9 and Table 2 for RC hole locations.
A total of six additional RC holes have been completed on the central section (including the precollar for DRRCD0019), the northern section (three RC holes) and the southern section (two RC
holes).
Several of these holes have intersected various zones of anomalous Pb-Zn-Cu-Sulphide
mineralisation as indicated by pXRF field analysis. Assays for all 11 RC holes are awaited. These
samples have been submitted to the assay lab and are expected to be returned in approximately 24 weeks.
Indicative zones of anomalous zinc sulphide mineralisation, based on pXRF analysis (see Note 1.) in
the RC holes within the central section are shown on Figure 10.
Next Steps
Diamond drilling targeting the Deep Zone mineralisation and other targets within the broad
PDIP chargeability anomaly continues from established RC holes located on both the central
section and the 80m step-out sections. This drilling will take several more weeks as we
progress the understanding of the mineralisation within the Deep Zone.
Samples for the 11 RC holes have been progressively submitted to ALS since drilling
commenced in mid-March. Assay results for the initial holes DRRC0012-DRRC0016
(Central Section) are expected to be returned in the next 1-2 weeks. Assays for DRRC0017
to DRRC0022 (Step-Out sections) are expected in 2-3 weeks.
Diamond cores from DRRCD0019 will be cut and submitted for assay in the next week with
results fast-tracked through the lab and expected to be returned in approximately 3-4 weeks.
Figure 9 – RC and DD drill hole locations at Durnings over GAIP image. Sections of drill holes are centred on the section containing
the discovery holes DRRC0006 and DRRCD0019. Other drill sections are located 80m grid north and 80m grid south of this section.
Figure 10 – Central Section A-A’ Durnings. RC holes DRRC0013 to DRRC0016 plotted with pXRF for zinc-sulphur on drill trace. (See
Note 1). Broad zones of zinc- sulphur anomalism in DRRC0013, DRRC0014 and DRRC0015 are indicated, implying other parallel
zones of steeply-dipping mineralisation may be present. Also note the drill trace of DRRCD0019 targeting the deeper chargeability
anomaly defined by PDIP isoshells. Blue (14mV/V), Orange (18mV/V) and Pink (22mV/V) chargeability isoshells.
Management Comment
Talisman’s Managing Director, Andrew Munckton, said: “The follow-up drill program at Durnings has
intersected some impressive visual mineralised intersections for Talisman based on logging by our
experienced field team, confirming that this is a potentially very significant base metal discovery and
a potential game-changer for the Company.
“Our first follow-up RC/diamond hole, DRRCD0019 collared immediately adjacent to the discovery
hole DRRC0006 drilled late last year, has intersected two significant zones of matrix, laminated and
blebby sulphide and one zone of massive sulphide containing galena, sphalerite and chalcopyrite.
“Located close to the original high-grade intersection in DRRC0006, the diamond core has
intersected massive and matrix sulphides over a down-hole width of 5.4 metres within a broader
26.8 metres wide mineralized zone from 201.3m down-hole.
“In addition, the hole has intersected a further 25.1 metre mineralized zone from 374m down-hole
containing 19.1m of semi-massive, matrix, and brecciated sulphides in a mineralized lode coincident
with a strong PDIP anomaly. This is without question the best hole ever drilled by Talisman in NSW
and marks a major turning point in our exploration of the Lachan Project.
“The strong multi-metal assay results received from the adjacent discovery hole DRRC0006 of 42m
at 2.3% Pb, 25.3g/t Ag, 1.3% Zn, 0.09% Cu, 0.43g/t Au included a 6m zone that assayed 10.3% Pb,
126g/t Ag, 3.5% Zn, 0.4% Cu and 1.93g/t Au in the RC drilling, indicates strong precious metals
values associated with the mineralization and a high-grade component to this apparently extensive
mineralized position.
“The wide mineralized intercept logged at the Deeper Zone target in DRRCD0019 included a 25.1m
wide zone containing several sections of massive sulphide as illustrated in Figure 6, Figure 7 and
Figure 8. We believe this zone has significant grade upside to the assay results previously received
and we are fast tracking the assay results for DRRCD0019 to demonstrate the high-grade potential
of the zone and the Durnings Prospect in general.
“Talisman’s geological team have been systematically stepping north and south of the discovery
hole line to test the extent of the target zone, aided by the surface GAIP model and the deeper PDIP
model developed recently. Geological indicators suggest we have potentially intersected the Upper
zone with RC drilling 80m north and 80m south of the discovery line. Assays for these RC holes are
awaited.
“The diamond drill rig will confirm the geological interpretation and target the Deeper zone on these
strike extension lines in the next few weeks.
“Our geology team is looking forward to integrating the new knowledge derived from this RC and
diamond drilling program with our full assay dataset from Durnings to provide a more detailed and
accurate picture of the orientation and style of lead-zinc-silver-copper-gold sulphide mineralisation
and to fully test this extensive structural corridor and emerging mineralised system in the coming
weeks.”
Ends
For further information, please contact:
Andrew Munckton - Managing Director
on +61 4 3563 5598
Nicholas Read (Media inquiries)
on +61 4199 29046
This release has been authorised by the Board of Talisman Mining Limited.
Competent Person’s Statement
Information in this announcement that relates to Exploration Results and Exploration Targets is based
on, and fairly represents information and supporting documentation compiled by Dr Tim Sharp, who is a
member of the Australasian Institute of Geoscientists. Dr Sharp is a full-time employee of Talisman
Mining Ltd and has sufficient experience which is relevant to the style of mineralisation and types of
deposits under consideration and to the activities 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”. Dr Sharp has reviewed the contents of this announcement and consents
to the inclusion in this announcement of all technical statements based on his information in the form and
context in which they appear.
Table 2: Drill-hole information summary - Durnings
Details and coordinates of the RC holes relevant to this release.
Exploration
Licence
Prospect
Hole Type
Hole ID
Easting
Northing
RL
Dip
Azimuth
(MGA 94)
EOH Depth
EL8660
Durnings
RCDT
DRRCDD0006
505927
6386293
287
-60
50
403.5
EL8660
Durnings
RC
DRRC0007
505819
6386566
285
-61
47
238
EL8660
Durnings
RCDT
DRRCDD0008
505691
6386868
294
-61
47
298.7
EL8660
Durnings
RC
DRRC0009
505639
6387024
290
-60
51
322
EL8660
Durnings
RCDT
DRRCDD0010
505829
6386739
289
-60
49
315.7
EL8660
Durnings
RCDT
DRRCDD0011
505988
6386156
286
-60
50
328
EL8660
Durnings
RC
DRRC0012
505988
6386344
282
-60
47
118
EL8660
Durnings
RC
DRRC0013
505990
6386340
282
-60
56
214
EL8660
Durnings
RC
DRRC0014
506049
6386395
280
-60
53
280
EL8660
Durnings
RCDT
DRRCDD0015
506050
6386400
280
-60
227
453.6
EL8660
Durnings
RC
DRRC0016
506079
6386420
280
-60
52
244
EL8660
Durnings
RC
DRRC0017
505998
6386457
281
-60
50
214
EL8660
Durnings
RC
DRRC0018
505936
6386406
282
-60
55
214
EL8660
Durnings
RCDT
DRRCDD0019
506079
6386420
280
-75
236
452.9
EL8660
Durnings
RC
DRRC0020
506101
6386334
281
-75
232
196
EL8660
Durnings
RC
DRRC0021
505988
6386457
281
-75
235
202
EL8660
Durnings
RC
DRRC0022
505988
6386457
281
-60
235
328
Note 1. Cautionary Statement
Determination of mineralisation has been based on geological logging, visual observation and confirmation using a pXRF machine. No
pXRF results are reported however the tool was used to verify the mineralisation. pXRF readings may not be representative of the
average concentrations of the elements of interest in a certain volume of material. As such, pXRF results are used as a
logging/sampling verification tool only. Laboratory analysis will be required to determine the level of mineralisation contained in the
mineralised zones. Visual estimates of mineral abundance or anomalism recorded on pXRF should never be considered a proxy or
substitute for laboratory analyses where concentrations or grades are the factor of principal economic interest. Visual estimates also
potentially provide no information regarding impurities or deleterious physical properties relevant to valuations.
Appendix 2
JORC Tables Section 1 & 2
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections)
Criteria
Sampling
techniques
Drilling
techniques
JORC Code explanation
•
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 3kg 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.
•
Drill type (e.g. core, reverse circulation, openhole 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).
Commentary
•
•
•
•
•
•
•
•
•
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.
RC Drilling samples are collected at either one metre or
two metre intervals via a drill rig mounted cyclone and
static cone splitter set to a 12% split to produce a nominal
4-7kg sample which was collected in a pre-numbered
sample bag.
RC samples undergo routine 2 metre composite pXRF
analysis using a Olympus Vanta M-series to aid in logging
and identifying zones of interest.
Diamond core samples, either PQ, HQ3 or NQ2 in size
diameter, were either cut in half longitudinally or a third
longitudinally, using an automated Almnonte core saw
Core was placed in boats, holding core in place. Core
sample intervals varied from 0.3 to 1.3m in length but were
predominantly aligned to 1m intervals or with sample
boundaries which respected geological contacts.
Sampling is controlled by Talisman protocols and QAQC
procedures as per industry standard and a chain of custody
maintained through transfer to ALS Laboratories in
Adelaide, SA.
RC /DD samples were dried, crushed (where required),
split and pulverised (total prep) to produce a master pulp.
From this master pulp, a 0.25g sub sample was taken for
multi-element analysis by four acid digest with an ICP-MS
finish. A 30g sub sample was also taken for fire assay for
gold with ICP-AES finish
RC drilling cited in this report was undertaken by Strike
Drilling Pty Ltd using a LC36 (KWL 700) truck-mounted
Reverse Circulation drill rig. A truck-mounted booster and
compressor provided high pressure air with an auxiliary
compressor used where ground conditions warranted.
RC drilling was completed with a face sampling hammer of
nominal 140mm size.
Diamond Drilling cited in this report was undertaken by
DDH1 Drilling Pty LTD ùsing an Evolution FH3000 or
UDR1200 truck mounted rig.
The core was orientated using a Reflex Ez-Ori Tool.
RC Drilling
•
•
•
•
RC drill sample recovery is generally high with sample
recoveries and quality recorded in the database by the
logging geologist
Sample recoveries were monitored in real-time by the
presence of Talisman personnel at the drill site.
No known relationship exists between recovery and grade
Criteria
JORC Code explanation
•
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.
Commentary
and no known bias exists.
Diamond Drilling
•
Core recovery data was recorded for each run by
measuring total length of core retrieved against the
downhole interval actually drilled and stored in the
database. TLM representatives continuously monitor core
recovery and core presentation quality as drilling is
conducted and issues or discrepancies are rectified
promptly to maintain industry best standards.
•
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.
RC Drilling
•
•
•
•
•
RC logging records lithology, mineralogy, mineralisation,
alteration, structure, weathering, colour and other primary
features of the rock samples and is considered to be
representative across the intercepted geological units.
RC logging is both qualitative and quantitative depending
on the field being logged.
All RC drill-holes are logged in full to end of hole.
All RC chip trays are photographed, and then stored onsite
in the Lachlan Copper-Gold Project.
All information collected is entered directly into laptop
computers or tablets, validated in the field, and then
transferred to the database. The level of logging detail is
considered appropriate for exploration and to support
appropriate mineral resource estimation, mining studies,
and metallurgical studies.
Diamond Drilling
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DD logging is carried out on site once geology personnel
retrieve core trays from the drill rig site. Core is collected
from the rig daily.
DD logging records lithology, mineralogy, mineralisation,
alteration, structure, weathering, colour and other primary
features of the rock samples and is considered to be
representative across the intercepted geological units.
All DD drill-holes are logged in full to end of hole.
Drillhole collar coordinates, azimuth, dip, depth and
sampling intervals are also recorded. DD logging is to
geological contacts.
DD logging is both qualitative and quantitative depending
on the field being logged. Logging of diamond drilling
includes geotechnical data, RQD and core recoveries.
Drill core is photographed prior to any cutting and/or
sampling, and then stored onsite in the Lachlan Copper Gold Project. Photographs are available for every diamond
drillhole completed.
All information collected is entered directly into laptop
computers or tablets, validated in the field, and then
transferred to the database. The level of logging detail is
considered appropriate for exploration and to support
appropriate mineral resource estimation, mining studies,
Criteria
JORC Code explanation
Commentary
and metallurgical studies.
Sub-sampling
techniques and
sample
preparation
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If core, whether cut or sawn and whether
quarter, half or all core taken.
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If non-core, whether riffled, tube sampled,
rotary split, etc. and whether sampled wet
or dry.
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For all sample types, the nature, quality
and appropriateness of the sample
preparation technique.
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Quality control procedures adopted for all
sub-sampling stages to maximise
representivity of samples.
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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.
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Whether sample sizes are appropriate to
the grain size of the material being
sampled.
RC Drilling
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Diamond Drilling
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Quality of ssay
data
and laboratory
tests
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The nature, quality and appropriateness of
the assaying and laboratory procedures
used and whether the technique is
considered partial or total.
For geophysical tools, spectrometres,
handheld XRF instruments, etc, the
parametres used in determining the
analysis including instrument make and
model, reading times, calibrations fa
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