Quarterly Activities Report
Released
Released
Announcement PDF
Quarterly Activities Report
June 2015
31st July 2015
COMPANY SNAPSHOT
Highlights
Board of Directors
Alan Senior
Non-Executive Chairman
Doolgunna Cu-Au Projects – (Farm-In JV with Sandfire Resources NL)
Gary Lethridge
Managing Director
Program of diamond drilling commenced by Sandfire at Springfield
Project including drilling at Monty and Homer Prospects.
Brian Dawes
Non-Executive Director
Karen Gadsby
Non-Executive Director
Significant high-grade VMS copper-gold discovery at Monty Prospect
located approximately 10km east of the DeGrussa Copper Mine.
Results include:
Contact Details
Telephone:
+61 8 9380 4230
Email:
o
TLDD0004A – intersection of 16.5m @18.9% Cu & 2.1g/t Au
from 409.5m downhole
o
TLDD0005 – further intersection of 9.2m @ 11.8% Cu & 2.9g/t Au
from 417m downhole and ~70m along strike from TLDD0004A
o
TLRC0004 – 18m of massive sulphides intercepted from 108m
downhole, 200m along strike from TLDD0004A. (assays pending)
Follow-up drilling continues with the aim of determining the extent of
identified mineralisation at the Monty Prospect and to develop
understanding of its economic and geological context.
info@talismanmining.com.au
Website:
www.talismanmining.com.au
Sinclair Nickel Project
Capital Structure
Regional exploration targeting review has identified Delphi North & South
as being prospective for Sinclair look-alike nickel occurrences.
Electromagnetic (EM) surveys and drilling programs at the Delphi
Prospect set to commence in first-half of August 2015.
Regional exploration targeting review now focusing on the remainder of
the tenements.
Geological modelling of the Sinclair deposit (incorporating both the
deposit extension and remnant mine mineralisation) progressed.
Scenario planning of development options continued.
Transfer of tenement titles to Talisman completed in April 2015.
Shares on Issue:
148,559,904 (TLM)
Options on Issue:
6,250,000 (Unlisted)
Capital Raising
Subsequent to the end-of-quarter, Talisman raised $8.0 million through a
strongly supported share placement of 17 million shares at 47 cents.
Doolgunna Copper-Gold Projects (Exploration Farm-in JV with Sandfire Resources)
Talisman has a portfolio of high-quality VMS copper-gold exploration projects in the Bryah Basin region of
Western Australia (see Appendix 1). Leading Australian copper producer Sandfire Resources NL (ASX:
SFR) is funding active exploration at these projects as part of a joint venture exploration farm-in. Sandfire
has the right to earn up to a 70% interest in Talisman’s Doolgunna Projects by spending $15 million on
exploration over five-and-a-half years.
Sandfire commenced a new program of reconnaissance diamond drilling at the Springfield Project during
the quarter, targeting the Monty and Homer prospects. The key achievement during the quarter was the
discovery of two significant zones of high-grade massive sulphide mineralisation at the Monty Prospect
which is emerging as an important new VMS discovery within the Springfield Project.
Monty Prospect
Diamond drill hole TLDD0004A at the Monty Prospect intersected a significant zone of high-grade coppergold mineralisation approximately 10km east of the DeGrussa Copper Mine, with final assays returning an
exceptional massive sulphide intercept of 16.5 metres grading 18.9% Cu and 2.1g/t Au from 409.5m to
426m down-hole (not true width & from 365m below surface vertical depth). Full details of the hole are
provided in the Company’s ASX Announcement dated 25 June 2015.
TLDD0004A was drilled as a follow-up hole to TLDD0002A, completed in May, and was designed to
intersect an off-hole EM response detected in a down-hole electro-magnetic (DHEM) survey on
TLDD0002A.
The intersection in TLDD0004A represents a significant development for Sandfire and Talisman and the
ongoing exploration efforts within the Springfield Project. While exploration of this emerging VMS prospect
is still at an early stage, the width, exceptional grade and tenor of the copper-gold mineralisation
intersected is considered to be very encouraging.
This is also the first significant intersection of high-grade copper-gold mineralisation to be discovered by
Sandfire or Talisman outside of the known lenses of VMS mineralisation at DeGrussa. Additionally, the
massive sulphide mineralisation intersected in TLDD0004A (see Figure 1) is similar to that seen in the
DeGrussa, Conductor 1, 4 and 5 VMS lenses and occurs within a host sequence that bears many
similarities to that which hosts the massive sulphide mineralisation at DeGrussa.
Figure 1:
Drill Core photos of massive sulphide mineralisation from hole TLDD0004A
A follow-up diamond hole TLDD0005, which was completed subsequent to the end of the June quarter,
intersected the mineralised horizon approximately 70 metres south-west of TLDD0004A, returning an
outstanding high-grade massive sulphide intercept of:
9.2 metres grading 11.8% Cu and 2.9 g/t Au from 417.0m to 426.2m down-hole
(not true width & from 370m below surface, vertical depth)
This intercept occurs within a broader mineralised zone of:
13.1 metres grading 8.4% Cu and 2.1 g/t Au from 416.7m to 429.8m down-hole
Also subsequent to the end of the June quarter, Sandfire drilled RC drill-hole TLRC0004 as a pre-collar for
planned diamond drilling and as a platform for down-hole EM surveying along strike from the massive
sulphide intercepts in TLDD0004A and TLDD0005.
TLRC0004 hole intersected 18 metres of massive sulphides from 108.0m to 126.0m down-hole. (Note
all intercepts are stated as down-hole, true widths are not currently known).
Based on field observations, the massive sulphides intersected in TLRC0004 also contain visible
chalcopyrite. This new intersection (TLRC0004) is located approximately 135 metres along strike to the
south-west from the massive sulphide mineralisation intersection reported in TLDD0005 and approximately
200 metres along strike from the high-grade intersection in TLDD0004A (see Figure 2).
TLRC0004 was completed to a final depth of 306 metres and will provide an optimal platform for Sandfire
to undertake down-hole EM (DHEM) surveys.
It is important to note that, while the new intersections have increased the known footprint of
mineralisation, the continuity with the mineralisation seen in holes TLDD0004A, TLDD0005 and TLRC0004
is not known. Further drilling will be undertaken by Sandfire to determine the geological setting.
Step-out diamond hole TLDD0006, which was collared to intersect the interpreted strike extension of the
previously intersected high-grade mineralisation 80m further to the south-west from hole TLDD0005, was
also completed subsequent to the end of the June quarter to a final depth of 553.9 metres.
The hole intersected a potentially significant fault zone and an extension of what is interpreted by Sandfire
to be the sedimentary host horizon to the intercepts seen in TLDD0004A and TLDD0005. The fault zone
was intersected between 407.2 metres and 445.6 metres down-hole with a thick sedimentary sequence of
80 metres observed from 422.5 metres to 502.2 metres down-hole. Sandfire have advised that this
sedimentary sequence is similar to that observed on the margins of the massive sulphide mineralisation at
DeGrussa.
While no massive sulphides have been recorded in TLDD0006, the hole provides valuable geological and
stratigraphic information to guide ongoing drilling to test the extent and orientation of the high-grade
copper-gold mineralisation intersected in the previous three holes. (TLDD0004A, TLDD0005 and
TLRC0004).
The significance of this fault zone, including sense of movement and potential offsets, is not yet known.
This includes the relationship of the fault zone to the mineralisation intersected in TLDD0004A and
TLDD0005 and the shallower massive sulphide zone intersected in step-out hole TLRC0004. Additional
drilling will be required to inform and enhance the growing understanding of the local geological context of
the Monty Prospect. As at the date of this report assay results are awaited for TLRC0004.
Figure 2
Plan view of recent Monty and Homer exploration diamond and RC drilling relative to the DeGrussa
Copper Mine.
Drilling is continuing and the next diamond drill-hole (TLDD0007) is targeted approximately 80m down-dip
of the mineralisation seen in TLDD0004A. The hole is being drilled as a diamond tail, off an existing
Reverse Circulation (RC) pre-collar that was drilled to a depth of 186m.
Sandfire have advised Talisman that scout drill hole TLRC0005 was completed subsequent to the end of
the June quarter without intersecting economic mineralisation and that the Reverse Circulation (RC) drill
rig will continue both, scout drilling to define the location of the prospective horizon and drilling pre-collars
for the diamond drill rig.
Sandfire will continue to explore the area to determine the potential extents of the mineralisation and to
develop further understanding of the broader geological context. A multi-faceted approach to the
exploration in the area will include collating information from ongoing down-hole EM surveys, structural
geological reviews, geochemical vectoring and stratigraphic analysis.
Homer Prospect
TLDD0001 was the first diamond hole drilled by Sandfire on the Springfield Project and was completed in
August 2014 to a final depth of 1,099m. The hole was designed to target a modelled conductor at a vertical
depth of 400m below surface which was interpreted to sit within the extension of the prospective DeGrussa
stratigraphic horizon, approximately 5km to the east of DeGrussa. The conductor resulted from the
analysis of high-powered FLEM and DHEM surveys in six drill holes previously drilled by Talisman.
TLDD0001 intersected a 37m package of rocks from 931.10m to 967.97m which Sandfire have interpreted
as being potentially analogous to the DeGrussa host horizon. The package consisted of siliciclastic rocks
with variable haematite alteration, ranging from unaltered to pervasively altered. Sporadic jasper clasts
were observed throughout the package. Within the most altered component of the package, a narrow zone
of strong silicification, banded magnetite and fine sulphides was intersected from 957.08m to 957.50m.
The VMS stratigraphic package (including trace disseminated Cu mineralisation) identified in TLDD0001 is
interpreted to be indicative of a proximal VMS environment.
During the June 2015 quarter, Sandfire drilled TLDD0003 at the Homer Prospect (see Figure 2 and Table
2) designed to test the eastern strike extension of the interpreted C5 host horizon roughly 450m ENE of
the TLDD0001 intersection.
The location of the drill collar coincided with a recently completed seismic line to facilitate stratigraphic
interpretation. The drill-hole intersected haematitic exhalite with jasper clasts, which is interpreted by
Sandfire to be the C5 target horizon. This horizon returned weakly anomalous base metal and trace
elements.
The hole confirms the continuation of the C5 host horizon and supports additional work by Sandfire in the
area heading further east along strike.
Drill-hole Information Summary
The aggregate exploration metres drilled by Sandfire at the Springfield Project, as part of the Doolgunna
Joint venture, along with hole information, and co-ordinates of drill holes are in Table 1 and Table 2 at the
end of this announcement.
Sinclair Nickel Project
The Sinclair Nickel Project is located in the prolific Agnew-Wiluna Greenstone Belt in WA’s North-eastern
Goldfields, one of the world’s premier nickel provinces with over 9 million tonnes of reported contained
nickel metal. The Sinclair nickel deposit was discovered by the former highly successful nickel miner and
explorer, Jubilee Mines NL, in October 2005. It was developed and commissioned in 2008 by Xstrata and
operated successfully before being placed on care-and-maintenance in August 2013, having produced
approximately 38,500 tonnes of nickel at an average life-of-mine head grade of 2.44% Ni.
Transaction Update
With the completion of the acquisition in February 2015 and payment of stamp duty in April 2015, the
registration of all Sinclair Nickel Project tenement titles to Talisman Nickel Pty Ltd was completed during
the June quarter.
Sinclair Nickel Project – Regional Targeting
During the quarter Talisman commenced a project-wide exploration targeting review that has already
identified numerous high priority exploration target areas across the Sinclair Nickel Project.
The compilation and critical assessment of existing and historic data across the project has highlighted the
significant exploration potential of this largely under explored region to host significant nickel sulphide
mineralisation with a number of high priority target areas emerging during the early stages of the regional
targeting review.
Delphi Prospect
The Delphi Prospect area, located between 4 to 10 kilometres south of the Sinclair mine (see Figure 4),
has delivered historic high grade nickel sulphide intersections in sparse historic drilling including:
0.44 metres at 5.43% Ni; and,
0.32 metres at 2.99% Ni.
(See ASX announcement 16 February 2015 for further details)
Figure 4
Long section looking west extending from Delphi prospect in the south to Cody Well in the North.
Priority surface and down-hole geophysical EM anomalies shown.
Reinterpretation of the geology extending south of Sinclair through the Delphi Prospect area has shown
similarities in the ultramafic rock units to those seen at Sinclair. In addition, historic geophysical EM
anomalies are now interpreted to lie in favourable stratigraphic positions and are interpreted by Talisman
to be indicative of possible accumulations of nickel sulphide mineralisation.
Talisman believes that similarities at Delphi to Sinclair are indicative of greater potential for massive
sulphide deposits than previously interpreted.
As such the Delphi prospect is considered to be the highest priority target and will be covered by a
program of geophysical surveys which are scheduled to commence in the first half August 2015. It is
anticipated that targeted exploration drilling will follow shortly thereafter, subject to assessment and review
of the results.
Cody Well
A similar, detailed review of Cody Well, approximately 3km north of Sinclair (see Figure 5), has revealed
three prospective targets, interpreted to lie in favourable stratigraphic positions coincident with
geophysical EM targets and geochemical anomalies that have not previously been tested by drilling.
The historic EM surveys at Cody Well were reprocessed, interpreted and verified by Newexco geophysical
consultants during the quarter and Talisman will extend this process into the forthcoming quarter with
other EM targets in the area as well as conducting an ongoing review of geological and geochemical
datasets in order to develop future drill targets.
Figure 5:
Plan showing geological interpretation extending north of Sinclair to Cody Well, geophysical
plates and geochemical anomalies shown.
Fly Bore
The Fly Bore Prospect is located approximately 15 kilometres north of Sinclair (see Appendix 2). Fly Bore
represents a significant exploration opportunity with very sparse historic drilling over an area in excess of
10 strike kilometres of ultramafic stratigraphy (see Figure 6). A number of historic geochemical and
geophysical anomalies are untested by drilling and have not been subject to any modern exploration
activities.
Figure 6. Fly Bore interpreted geology with historic EM and geochemical anomalism shown
Talisman, in conjunction with Newexco geophysical consultants, will review, re-process and reinterpret the
historic geophysical data in the forthcoming quarter with a view to confirming the validity of the historic
surveying and possibly developing targeted modern geophysics programs with the aim of developing high
priority drill targets.
Sinclair Nickel Deposit – Geological Modelling & Studies
The Sinclair deposit comprises an elongated body of massive and heavily disseminated sulphide
mineralisation with a shallow plunge of around 20 degrees to the north (see Figure 7). The underground
development and stoping extended to 445m below surface and provides a near-mine nickel sulphide
exploration opportunity within the down-plunge extensions of the Sinclair ore body as well as the possibility
for extraction of remnant mineralisation adjacent to the existing stopes.
Talisman continued work on a geological model of the entire Sinclair deposit during the quarter. The intent
of this work is to improve understanding of the deposit, provide target vectors for drill programs and to be a
pre-cursor to any potential resource estimate for the Sinclair deposit.
Scenario planning for the recommencement of the Sinclair Nickel Project continued during the quarter. This
work focused on improving Talisman’s understanding of issues including:
the regulatory approvals process particular to the Sinclair Project;
the dewatering and rehabilitation requirements for re-entering the existing underground mine; and
understanding the practicalities of mining any potential remnant mineralisation.
Figure 7: Sinclair Nickel deposit longitudinal projection with mine development showing mineralised Ni drill
intercepts greater than 2% Ni beyond the limit of existing mine development as well as targets at Skye and Stirling
Stirling and Skye Prospects – Near-Mine Exploration Potential
The Stirling and Skye Prospects comprise two mineralised ultramafic channels parallel to, and beneath the
main Sinclair orebody, proximal to the Sinclair underground mine development.
Stirling and Skye show strong similarities to the Sinclair orebody, with massive nickel sulphides associated
with at least two positions at the base of a complexly folded ultramafic sequence. Both prospects have
returned significant nickel intersections at their near-surface positions, but are largely untested downplunge beneath Sinclair (see Figure 7).
Talisman continued to integrate the new 3D geological and electromagnetic models during the June
quarter, together with historical drill-hole data. The Company anticipates evaluating potential drill programs
to test the highest priority EM drill targets in optimal geological positions along the Stirling and Skye
mineralised channels during the forthcoming quarter.
Care and Maintenance
The annual Groundwater Monitoring Summaries for the Marshall Creek and Sinclair Ground Water
Licences were submitted during the June quarter.
Applications to transfer the titles of the Department of Environment Regulation (DER) Licence, Registration
and Works Approval associated with Sinclair were lodged during the previous quarter and ongoing dialog
with the DER to progress these applications was undertaken during the June quarter. Final approval by
the DER is expected shortly.
Murchison Exploration Projects
Livingstone Project (TLM 80%) and Muddawerrie Gold Project (TLM 80%)
Talisman completed the withdrawal from the Livingstone and Muddawerrie Joint Ventures and the
surrender of the accompanying tenement areas following notification to its Joint venture party (Zebina
Minerals Pty Ltd) of its intention to withdraw from the Joint Venture in the March 2015 quarter.
Corporate
At the end of the quarter Talisman had cash reserves of $4.7 million.
On 10 July 2015, subsequent to the end of the June quarter Talisman announced that it had successfully
raised a total of $8.0 million (before costs) through a share placement of approximately 17 million shares at
47 cents.
The placement was exceptionally well supported by both existing and new shareholders despite extremely
volatile and challenging global equity market conditions. On 17 July 2015 Talisman issued 17,021,277
Fully Paid Ordinary Shares to strategic, professional and sophisticated investors within its 15% placement
capacity in accordance with ASX Listing Rule 7.1.
The funds raised will provide support for any potential future requirements for Talisman to contribute to
joint venture funding at the Doolgunna copper-gold joint venture with Sandfire Resources NL, including the
recent high-grade Monty discovery, to progress the growth strategy at the Sinclair Nickel Project and for
working capital purposes.
ENDS
For further information, please contact:
Gary Lethridge – Managing Director
on +61 8 9380 4230
For media inquiries, please contact:
Nicholas Read – Read Corporate
on +61 419 929 046
Competent Persons’ Statement
Information in this report that relates to Exploration Results is based on information compiled by Mr Graham
Leaver, who is a member of the Australian Institute of Geoscientists. Mr Leaver is a full-time employee of
Talisman Mining Ltd and has sufficient experience which is relevant to the style of mineralisation and types of
deposit under consideration and to the activities undertaken to qualify as a Competent Person as defined in the
2012 Edition of the “Australian Code for Reporting of Mineral Resources and Ore Reserves”. Mr Leaver
consents to the inclusion in this report of the matters based on information in the form and context in which it
appears.
Table 1: Aggregate exploration metres drilled by Sandfire at the Springfield Project as part of the
Doolgunna Cu-Au Exploration Farm-in Joint venture
Aggregate exploration metres drilled by Sandfire at the Springfield Project during the June quarter:
Aircore/RAB Drilling
RC Drilling
Diamond Drilling
Total
30,929 metres
60 metres
2,256 metres
33,245 metres
Table 2: Drill-hole Information Summary, Springfield Project
Details and co-ordinates of the historical drill-hole SPD021 and recent drill holes completed by Sandfire at
the Springfield Project, TLDD0001, TLDD0002A, TLDD0003 and TLDD0004A, together with details of
step-out drill-holes TLDD0005 and TLDD0006, the new diamond drill hole TLDD0007 and RC holes
TLRC0004 and TLRC0005 are provided below:
Hole ID
Depth
Dip
Azimuth
SPD021
553
-60°
TLDD0001
1099
TLDD0002A
East
North
RL
Lease ID
Hole Status
180°
MGA94_50 743598
7171437
598
E52/2282
Complete
-62°
357°
MGA94_50 740146
7174149
589
E52/2313
Complete
463
-61°
110°
MGA94_50 743544
7171211
602
E52/2282
Complete
TLDD0003
658
-62°
355°
MGA94_50 740596
7174550
589
E52/2313
Complete
TLDD0004A
817
-60°
148°
MGA94_50 743588
7171281
601
E52/2282
Complete
TLDD0005
478
-62°
139°
MGA94_50 743544
7171211
602
E52/2282
Complete
TLDD0006
554
-62°
138°
MGA94_50 743479
7171160
602
E52/2282
Complete
TLRC0004
306
-62°
143°
MGA94_50 743497
7171025
605
E52/2282
Complete
TLRC0005
306
-62°
138°
MGA94_50 743321
7170993
602
E52/2282
Complete
Ongoing -62°
138°
MGA94_50 743505
7171271
602
E52/2282
In Progress
TLDD0007
Grid_ID
Appendix 1 – Talisman’s Doolgunna Copper-Gold Projects subject to the $15M Exploration Farm-In Joint Venture
with Sandfire Resources NL
Appendix 2: Plan showing Talisman tenement holding at the Sinclair Nickel Project and selected prospect names
Appendix 3 – Talisman Mining Tenement Schedule as at 30 June 2015
Project/Tenement
Location
and blocks
(Area)
Interest at
Beginning
Quarter
Interest
at End
Quarter
Acquired
during
Quarter
Surrendered
during
Quarter
LIVINGSTONE
W.Australia
E52/2565
15
80%
0%
-
80%
E52/2566
31
80%
0%
-
80%
E52/2593
P52/1423
E52/2931
24
(195 HA)
2
80%
100%
100%
0%
0%
0%
-
80%
100%
100%
MUDDAWERRIE
W.Australia
E51/1447
17
80%
0%
-
80%
HALLOWEEN WEST
E52/2275
W.Australia
6
63%
63%
-
-
HALLOWEEN
W.Australia
(200 HA)
100%
100%
-
-
W.Australia
70
14
14
100%
100%
100%
100%
100%
100%
-
-
W.Australia
6
13
5
3
(103.10 HA)
(83.90 HA)
(568 HA)
(973 HA)
(843 HA)
(981.50 HA)
(841.75 HA)
(536.70 HA)
(926.85 HA)
(983.80 HA)
(891 HA)
(505 HA)
(821 HA)
(120.05 HA)
(136 HA)
(959 HA)
100%
100%
100%
0%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
0%
100%
100%
0%*
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
*
-
100%
-
P52/1241
SPRINGFIELD
E52/2282
E52/2313
E52/2466
SINCLAIR NICKEL
PROJECT
E37/538
E37/903
E37/1012
E37/1231*
L36/198
L37/175
M36/444
M36/445
M36/446
M37/362
M37/383
M37/384
M37/385
M37/386
M37/424
M37/426
M37/427
M37/590
M37/692
M37/735
-
Joint Venture
Partner/FarmIn Party
JV and Farm-in Sandfire
Resources Ltd
JV and Farm-in Sandfire
Resources Ltd
JV and Farm-in Sandfire
Resources Ltd
Appendix 3 – Talisman Mining Tenement Schedule as at 30 June 2015 (Continued)
Project/Tenement
SINCLAIR NICKEL
PROJECT
M37/816
M37/818
M37/819
M37/1063
M37/1089
M37/1090
M37/1126
M37/1127
M37/1136
M37/1137
M37/1148
M37/1168
M37/1223
M37/1275
P37/7228
P37/7233
Location and
blocks
(Area)
Interest at
Beginning
Quarter
Interest
at End
Quarter
Acquired
during
Quarter
Surrendered
during
Quarter
W.Australia
(818.40 HA)
(806.50 HA)
(380.18 HA)
(604 HA)
(574 HA)
(478 HA)
(603 HA)
(603 HA)
(986 HA)
(850 HA)
(44.78 HA)
(190 HA)
(675 HA)
(1,961 HA)
(61.57 HA)
(116.01 HA)
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
-
-
-Intentionally Blank* EL37/1231 Exploration licence application lodged 16 June 2015
Joint Venture
Partner/FarmIn Party
.
Appendix 4 – JORC Table 1
Section 1 Sampling Techniques and Data
(Criteria in this section apply to all succeeding sections.)
Criteria
JORC Code explanation
Commentary
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.
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, facesampling bit or other type, whether core
is oriented and if so, by what method,
etc).
Sampling techniques employed at the Sinclair project include
saw cut diamond drill core (DD) samples and reverse
circulation (RC) rock chip samples.
Diamond core is HQ and NQ2 size, and was sampled on
geological intervals (0.2 m to 2 m), cut into half (NQ2) or
quarter (HQ) core to give sample weights under 3 kg. RC drill
samples were collected using a cone or riffle splitter for each
metre drilled. Composite samples were taken on occasion via
a second sampling chute and collected into calico bags.
Sampling was guided by Xstrata Nickel Australasia (XNAO)
and QAQC procedures as per industry standard.
All drill samples were crushed, dried and pulverised (total
prep) to produce a sub-sample for analysis by four acid digest
with an ICP-MS or AAS finish.
All drilling referenced in this report were drilled by XNAO
between 2005 and 2012.
Sampling techniques employed by Sandfire on the
Doolgunna Project include half core sampling of NQ2
diamond drill (DD) core, Reverse Circulation (RC) drilling
samples collected by a cone splitter for single metre samples
or sampling spear for composite samples, and Air Core (AC)
sample collected using spear techniques for both composite
and single metre samples
Sampling is guided by Sandfire DeGrussa protocols and
QAQC procedures as per industry standard.
RC and AC sample size reduction is completed through a
Boyd crusher to -10mm and pulverised via LM5 to nominal 75µm. Pulp size checks are completed.
Diamond core size reduction is through a Jaques jaw crusher
to -10mm and all samples Boyd crushed to -4mm and
pulverised via LM5 to nominal 90% passing -75µm using wet
sieving technique.
Samples are assayed using Mixed 4 Acid Digest (MAD) 0.3g
charge and MAD Hotbox 0.15g charge methods with ICPOES
or ICPMS.
Fire Assay is completed by firing 40g portion of the sample
with ICPMS finish.
Surface diamond drilling (DD) on the Sinclair project
employed both HQ and NQ2 diameter holes using
conventional wireline, wedging and directional drilling
techniques as appropriate.
All drill core was routinely orientated where possible at
nominal 6m intervals using an EzyMark core orientation
system
Reverse Circulation (RC) drilling at Sinclair utilised face
sampling configurations with a nominal hole diameter of 5 3/8”
Sandfire Air Core (AC) drilling is completed using industry
standard practices with a blade bit, RC drilling with a face
sampling hammer of nominal 140mm size and diamond
drilling is completed using NQ2 size coring equipment.
All drill collars are surveyed using RTK GPS.
All core, where possible is oriented using a Reflex ACT II RD
orientation tool.
Downhole surveying is undertaken using a gyroscopic survey
instrument.
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.
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