REG - Greatland Resources - Exploration and Resource Development Update
22/01/2026 07:45
For best results when printing this announcement, please click on link below:
https://newsfile.refinitiv.com/getnewsfile/v1/story?guid=urn:newsml:reuters.com:20260122:nRSV9396Pa&default-theme=true
RNS Number : 9396P Greatland Resources Limited 22 January 2026
Greatland Resources Limited
E: info@greatland.com.au
W: https://greatland.com.au
: x.com/greatlandgold
NEWS RELEASE | 22 January 2026
Resource Development & Exploration Activities Report
December Quarter 2025
THIS ANNOUNCEMENT CONTAINS INSIDE INFORMATION AS STIPULATED UNDER THE UK
MARKET ABUSE REGULATIONS. ON PUBLICATION OF THIS ANNOUNCEMENT VIA A
REGULATORY INFORMATION SERVICE, THIS INFORMATION IS CONSIDERED TO BE IN THE
PUBLIC DOMAIN.
Record FY26 drilling and exploration program continues to deliver
Promising results from the second quarter of Telfer's record drilling program,
including highest grade West Dome Underground drilling results to date
Highlights
Telfer Resource Development Drilling
§ 54,204 metres (resource growth and conversion drilling) completed from
756 holes during the December quarter (September quarter: 53,543 metres; FY26
H1: 106,766 metres).
§ Greatland remains well placed to deliver on its record 240,000m Telfer
FY26 drilling program, with increased drill capacity now on site to accelerate
the program in the March 2026 quarter.
West Dome Underground
§ 11 holes for 6,284m drilled during the quarter at the West Dome
Underground (WDU) project, with further exceptional drilling results
continuing to grow the scale of the opportunity.
§ In addition to the results reported on 27 November 2025 (refer to
announcement "West Dome Underground Project Update
(https://app.sharelinktechnologies.com/announcement-preview/asx/8ae1edfcd6bfc1498cac81b65b8a6a7c)
"), assays from a further 10 holes were received during the quarter, with the
following significant results:
- 55.3m @ 7.4 g/t Au & 0.43 % Cu (411 gram-metres Au (gm)(1)) from
427m (WUC4550104)
- 27.0m @ 9.3 g/t Au & 0.15 % Cu (251gm) from 495m (WUC4550104)
- 50.2m @ 2.8 g/t Au & 0.36 % Cu (141gm) from 263m (WUC4550105)
- 27.1m @ 3.2 g/t Au & 0.95 % Cu (87gm) from 323m (WUC4550068)
- 15.8m @ 5.0 g/t Au & 0.23 % Cu (79gm) from 332m (WUC4550087)
§ Maiden Mineral Resource Estimate remains targeted in the March 2026
quarter.
Note (1): Formula: gm = interval width multiplied by Au grade
West Dome Open Pit
§ 20,769m of resource growth drilling completed during the quarter; with
the completion of the targeted Stage 7 extension drilling early in the
quarter, drill capacity has now shifted to focus on the multi-year Stage 2
extension opportunity.
§ 19,368m of resource conversion drilling completed during the quarter,
providing increased geological confidence for the material within both Stage 7
and Stage 2 extensions to underpin the remainder of FY26 mine plan.
Main Dome Underground
§ 7,756m drilled across 86 holes, targeting resource conversion &
growth drilling across several near-mine targets during the quarter.
§ Growth drilling has confirmed and extended mineralisation at both ESC
South and Kylo.
Regional Exploration
§ South-East Hub satellite extension drilling at the Big Tree deposit
confirmed mineralisation down dip of historic drilling and along strike of the
deposit.
§ Paterson South Farm-In drill testing was completed at the Teague
prospect, approximately 35km east-southeast of Telfer. Highly encouraging gold
and pathfinder element mineralisation was intersected in hole TRS007RCD:
- 8m @ 1.30g/t Au from 241m (including 3m @ 3.11 g/t Au from 241m)
- 15m @ 0.40g/t Au from 150m (including 4m @ 0.98g/t Au from 161m)
§ Assay results were received for the remaining holes in the Thomsons
deposit extension drill program, identifying down dip mineralisation and east
west orientated high-grade veins aligned subparallel to previous drilling,
with a peak of 0.62m @ 35.06g/t Au & 0.04% Cu from 478m THO25RCD014.
§ Growth drilling continued at the Camp Dome deposit, testing for
extensions to mineralisation below the oxide deposit.
§ Ernest Giles first pass testing of Induced Polarity (IP) anomalies was
completed with diamond drillhole tails. Peak gold mineralisation was recorded
in drillhole EGD009, with mineralisation open along strike and up and down
dip:
- 9m @ 0.72g/t Au from 349m (including 3m @ 1.30 g/t Au from 349m and 1m @
2.43 g/t Au from 354m)
Greatland Managing Director, Shaun Day, commented:
"Our record 240,000m annual drilling program at Telfer has continued to
deliver very promising results in the December quarter, which strongly support
the potential for multi-year Telfer life of mine extension from both open pit
and underground opportunities.
"The high-grade West Dome Underground project is particularly exciting,
returning the highest gram-metre intercept to date of 55.3m at 7.4 g/t gold
and 0.43 % copper (411 gram-metres gold). Encouragingly, this result is the
southern most assay returned to date, and the mineral system is increasing in
size towards the south which remains open. Three diamond drill rigs are now
operating at the project and a maiden Mineral Resource estimate is targeted in
the March 2026 quarter.
"Resource growth and conversion drilling in the West Dome Open Pit and Main
Dome Underground continue to enhance our geological confidence in near term
mining areas and longer-term extension opportunities. In total, over 100,000
metres of new resource growth drilling will inform our next Telfer Mineral
Resource update in the March 2026 quarter.
"The quarter's regional exploration results are encouraging, both in the
Paterson and at our Ernest Giles project, an Archean greenstone in the Yilgarn
region."
Overview
Greatland Resources Limited (Greatland) is pleased to provide this update on
resource development and exploration activities.
Telfer Resource Development
Greatland remains on track to complete the largest annual drilling program in
Telfer's operating history, with ~240,000 metres total drilling planned in
FY26, comprising ~150,000m of resource growth drilling and ~90,000m of
resource conversion drilling.
First half (June to December 2025) drilling of 106,766m has now been
completed, in line with the planned delivery schedule.
Figure 1: Telfer historic and planned FY26 drilling
The objective of the planned drilling is expansion and conversion of Telfer
Mineral Resources to support targeted further multi-year mine life extensions.
Three key extension opportunities are presently targeted, the West Dome Open
Pit (WDO), Main Dome Underground (MDU) and West Dome Underground (WDU).
Figure 2: Telfer planned Resource Development drilling by area
A total of 54,204m was drilled during the quarter, comprising:
§ Conversion: 565 holes for 19,183m; and
§ Growth: 190 holes for 34,863m.
A fifth underground diamond drill (DD) rig was mobilised during the quarter,
and the decision has been made to add a sixth underground DD rig based on the
continued success in the WDU drilling program. The sixth underground rig is
expected to arrive in February 2026 to enable testing of the expanse of the
WDU mineralisation (extension drilling).
Three reverse circulation (RC) rigs continued drilling throughout the quarter
with a relatively even split between growth and conversion drilling.
Conversion drilling in FY26 H1 has now provided increased geological
confidence across all active mining areas, allowing increased growth drilling
focus for the remainder of FY26.
West Dome Open Pit (WDO)
Drilling for the December quarter remained focused on two priority cutback
opportunities:
§ Stage 7 Extension: Extension of the existing Stage 7 cutback towards the
north (refer Figure 3), which is expected to provide Telfer's baseload ore
feed for FY27 and FY28.
§ Stage 2 Extension: Extension of the current Stage 2 towards the south,
east and west. The area being targeted with drilling is substantial and has
the potential to support multi-year extension of the Telfer open pit mine life
beyond FY28.
Stage 7 Extension drilling was completed during the quarter, with drill
capacity shifting to predominately concentrate on the southern Stage 2
Extension which will remain a focus for much of the March 2026 quarter.
Figure 3: West Dome Open Pit - December 2025 Quarter (Q2 FY2026) Drilling
Drilling in the West Dome continues to increase our confidence in the
geological model that underpins the Mineral Resource, with a combination of
reef hosted and wide stockwork domains intercept to date.
The following significant results were returned during the quarter, with the
full list of results in Table 1.
Stage 7 Extension
A total of 28 resource growth holes for 5,857 metres was completed in the
quarter, with the following significant results:
§ 35m @ 4.8 g/t Au & 0.30 % Cu (167 gm) from 273m (WR28748)
§ 45m @ 0.9 g/t Au & 0.07 % Cu (41 gm) from 147m (WR39551)
§ 41m @ 1.0 g/t Au & 0.02 % Cu (41 gm) from 121m (WR39552)
§ 42m @ 0.8 g/t Au & 0.21 % Cu (35 gm) from 159m (WR39219)
§ 36m @ 1.0 g/t Au & 0.24 % Cu (36 gm) from 166m (WR40079)
§ 20m @ 1.6 g/t Au & 0.07 % Cu (24 gm) from 58m (WR39554)
§ 42m @ 0.6 g/t Au & 0.02 % Cu (25 gm) from 168m (WR40737)
All results have been received and the Mineral Resource update is in progress.
Stage 2 Extension
A total of 63 resource growth holes for 14,804 metres was completed during the
quarter, with the following significant results:
§ 22m @ 2.9 g/t Au & 0.33 % Cu (65 gm) from 168m (WR24227)
§ 49m @ 0.9 g/t Au & 0.09 % Cu (47 gm) from 10m (WR27230)
§ 38m @ 1.1 g/t Au & 0.27 % Cu (42 gm) from 146m (WR24226)
§ 11m @ 3.2 g/t Au & 0.10 % Cu (36 gm) from 403m (WR25707)
§ 38m @ 0.6 g/t Au & 0.07 % Cu (24 gm) from 28m (WR27595)
§ 21m @ 0.9 g/t Au & 0.06 % Cu (20 gm) from 58m (WR33156)
With the completion of most of the growth drilling in the active mining areas
during the December quarter, drilling will now shift to testing from both the
eastern and western sides of the Stage 2 southern extension.
Main Dome Underground (MDU)
The first half of FY26 drilling campaign in the MDU has been focused on near
term extension opportunities, and has successfully confirmed multiple near
mine extensions such as A Reef, Tarkin (LLU), Rey extensions and the Eastern
Stockwork Corridor (ESC) that have been drilled to a mine ready status and
delivered to the operations team.
The focus of the second half of FY26 drilling is longer term growth
opportunities, such as the ESC extensions, VSC, Kylo and A Reef North, which
have the potential to provide significant mine life extension and are all
adjacent to the existing underground infrastructure.
December quarter drilling in the MDU comprised 86 holes for 7,606 metres
focused on the A Reef & ESC, with resource conversion and resource growth
drilling at the Kylo target completed during the quarter.
Following the September quarter's impressive results at Kylo, additional
results were received in the December quarter (Figure 4) confirming the
presence of significant mineralisation. Drilling has delineated both narrow
high grade reef style and broader stockwork style mineralisation, with the
technical review underway to direct future drilling and extraction options.
The following significant results were received from Kylo drilling during the
quarter:
§ 17m @ 3.1 g/t Au & 0.09 % Cu (60 gm) from 28m (MUC4540093)
§ 4.0m @ 8.9 g/t Au & 0.59 % Cu (36 gm) from 34m (MUC4540090)
§ 7.7m @ 2.7 g/t Au & 0.38 % Cu (21 gm) from 26.3m (MUC4540094)
§ 22.1m @ 1.8 g/t Au & 0.31 % Cu (39 gm) from 28m (MUC4540096)
§ 49.8m @ 1.2 g/t Au & 0.07 % Cu (60 gm) from 49m (MUC4540086)
Figure 4: Main Dome Underground -Kylo December 2025 Quarter Drilling
West Dome Underground (WDU)
Greatland's announcement on 27 November 2025 "West Dome Underground Project
Update
(https://app.sharelinktechnologies.com/announcement-preview/asx/8ae1edfcd6bfc1498cac81b65b8a6a7c)
" included assay results from a further 9 new holes that were received prior
to that announcement.
Increasing drill density has improved understanding of the WDU, with three
mineralised domains now confirmed: a broad sub-vertical Western Stockwork
Corridor (WSC), flanked by the extensive Western Limb and Eastern Limb high
grade shoots hosted within the Lower Limey Unit (LLU), an important geological
horizon for gold-copper mineralisation at Telfer.
Western Stockwork Corridor (WSC)
The WSC mineralisation is located within the hinge of the WDU fold (Figure 5)
and consists of a broad zone of concordant and discordant stockwork/sheeted
and breccia veins, containing chalcopyrite, pyrite, white & pink dolomite,
quartz and galena. There is also a notable overprinting of albite alteration.
The potential of this domain was first identified during the maiden
underground drilling campaign, which although focused on the high-grade
Western Limb also intercepted several broad zones of stockwork mineralisation
within the hinge of the fold.
Recent drilling to the south (Figure 5) has return multiple intercepts of
broad higher-grade mineralisation within the WSC during the quarter, with the
following significant results returned during the quarter:
§ 55.3m @ 7.4 g/t Au & 0.43 % Cu (411 gm) from 426.7m (WUC4550104)
§ 29m @ 2.0 g/t Au & 0.01 % Cu from (58 gm) 405m (WUC4550102)
§ 56.6m @ 2.2 g/t Au & 1.26% Cu (127gm) from 337m (WUC4550083) -
previously announced(2)
§ 82.2 @ 1.9 g/t Au & 0.31% Cu (156gm) from 360.7m (WUC4550092) -
previously announced(2)
§ 66.5m @ 1.18 g/t Au & 0.16% Cu (78gm) from 334m (WUC4550085) -
previously announced(2)
§ 24.0m @ 1.18 g/t Au & 0.10% Cu (28gm) from 309m (WUC4550081) -
previously announced(2)
The drilling to date confirms continuous WSC mineralisation over 700m of
strike, averaging approximately 40m wide (true width) x 150m dip extent
(height), and remains open along strike, and up and down dip. These recent
results indicate higher grade and increased width to the south of the Phase 1
drilling.
The WSC is considered comparable to the Vertical Stockwork Corridor or 'VSC'
domain that was one of the dominant domains targeted by the Sub-Level Cave
(SLC) at the Telfer Main Dome Underground from 2008 to 2019 (mining
approximately 5Mtpa on average) and is a key extension opportunity currently
under assessment.
Western Limb
The Western Limb of LLU mineralisation has returned some of the highest grade
WDU results to date and this continues to be the case. Mineralisation has been
confirmed over 700m in strike, averaging 10m wide and over 100m down dip to
date, and remains open to the north and south.
The following significant results were returned during the quarter:
§ 27.0m @ 9.3 g/t Au & 0.15 % Cu (250 gm) from 495m (WUC4550104)
§ 27.1m @ 3.2 g/t Au & 0.95 % Cu (88 gm) from 323m (WUC4550068)
§ 15.8m @ 5.0 g/t Au & 0.23 % Cu (79 gm) from 332m (WUC4550087)
§ 28.9m @ 2.4g/t Au & 0.24% Cu (68 gm) from 430m (WUC4550105)
§ 30.1m @ 1.6 g/t Au & 0.48 % Cu (49 gm) from 368m (WUC4550084)
§ 28m @ 1.8 g/t Au & 0.34% Cu (52gm) from 366m (WUC4550081) -
previously announced(2)
§ 5.5m @ 3.6 g/t Au & 0.29% Cu (20gm) from 389m (WUC4550083) -
previously announced(2)
§ 7.15m @ 2.3 g/t Au & 0.13% Cu (17gm) from 416m (WUC4550085) -
previously announced(2)
§ 6.84m @ 2.28g/t Au & 0.25% Cu (16gm) from 447m (WUC4550092) -
previously announced(2)
Eastern Limb
The Eastern Limb mineralisation is hosted with the same LLU unit that has
hosted the Western Limb and has been defined over 500m in strike, 100m dip
extents and averaging 10m true width (Figure 5).
Increased mineralisation is now being identified in the Eastern Limb, with
recent results returning similar grades to those seen in the Western Limb.
The following significant results were returned during the quarter:
§ 50.2m @ 2.8 g/t Au & 0.36 % Cu (140 gm) from 262.53m (WUC4550105)
§ 8.5m @ 3.0 g/t Au & 0.16 % Cu (26 gm) from 213.85m (WUC4550104)
§ 6.6m @ 1.9 g/t Au & 0.39% Cu (12gm) from 154m (WUC4550083) -
previously announced(2)
§ 3.85m @ 4.1 g/t Au & 0.38% Cu (16gm) from 168m (WUC4550092) -
previously announced(2)
§ 4.75m @ 1.7 g/t Au & 0.13% Cu (8gm) from 155m (WUC4550081) -
previously announced(2)
§ 12.6m @ 1.4 g/t Au & 0.13% Cu (17.5gm) from 209.4m (WUC4550102) -
previously announced(2)
Note (2): Result reported in the announcement "West Dome Underground Project
Update
(https://app.sharelinktechnologies.com/announcement-preview/asx/8ae1edfcd6bfc1498cac81b65b8a6a7c)
" on 27 November 2025.
Figure 5: West Dome Underground "3D Isometric view" looking north
Figure 6: West Dome Underground Geological Section (looking north)
Regional Exploration
Greatland holds a significant portfolio of precious and base metals focused
exploration and development projects in Western Australia, the focus of which
is the Paterson region surrounding Telfer and Havieron.
Figure 7: Paterson region projects
In H1 FY26 Greatland advanced extension drilling at several known satellite
deposits on mining leases, within trucking distance of the Telfer processing
plant, and considers them to have potential to provide ore feed to Telfer.
The main targets tested to date are the South-East Hub, Thomsons deposit 16km
NE of the mill, Camp Dome deposit, ~16km north of the mill and the
O'Callaghans tungsten-copper polymetallic skarn deposit (Figure 7).
Work has also been completed targeting prospects within the Paterson South
project (the subject of a farm-in and joint venture arrangement between
Greatland Paterson South Pty Ltd and Rio Tinto Exploration Pty Limited (RTX),
under which Greatland is earning up to a 75% interest).
South-East Hub (SE Hub)
The SE Hub is located approximately 25km south-east of the Telfer Mine Site
and hosts a cluster of three known deposits (Big Tree, Dolphy and Ironclad)
that were historically reported as Mineral Resources by Telfer's previous
owner Newcrest Mining Limited, but have not been declared as Mineral Resources
by Greatland until adequate technical evaluation is conducted.
Drilling during the quarter has focused on testing for extensions down dip and
along strike of the Big Tree deposit (Figure 8). Three of six planned
diamond holes have been completed and one is in progress, for a total of
1,197m drilling. Assay results have been received for two holes and partial
results for one.
Encouragingly, two holes drilled to the northeast and along strike of the
historic resource intersected shallow mineralisation down dip from historic
drilling. The program is planned to recommence in the June 2026 quarter.
Highlights to date include:
§ 5.38m @ 1.60g/t Au from 110.62m, including 0.25m @ 33.2g/t Au from
112.65m (BT25DD001)
§ 25m @ 0.24g/t Au from 124m (BT25DD002)
Figure 8: Big Tree plan view showing 2025 drill traces, peak intercepts per
hole, historic mineralisation on Magnetics RTP image
Figure 9: Oblique section A showing results from hole BT25DD001 and historic
drilling
Figure 10: Oblique section B showing partial results from hole BT25DD002 and
historic drilling.
Thomsons
Thomsons is an historic deposit located approximately 14km northwest of Telfer
on the western limb of a tight overturned anticlinal structure with
mineralisation hosted in reef and stockworks analogous to Telfer Main and West
Dome deposits. In September 2025, Greatland completed a seven hole drill
program aimed at testing for Telfer style stacked reef and stockwork
mineralisation beneath and along strike of shallow (<100m) historical
mineralisation.
Assay results for the remaining three drillholes of the program have been
received. The program has demonstrated potential for additional shallow
mineralisation along strike and down dip of historic drilling and has
identified a new high-grade east west oriented vein set that remains open
along strike and down dip. The potential for stacked reef mineralisation at
depth has been downgraded. These results will be used to refine the
geological interpretation to guide future exploration targeting.
Highlights from new results include:
§ 0.6m @ 35.06g/t Au & 0.04% Cu from 478m (THO25RCD014)
§ 2.9m @ 2.35g/t Au & 0.06% Cu from 318.4m (THO25DD013)
Figure 11: Thomsons plan view showing 2025 drill traces, gold intercepts from
2025 and historical drilling with Magnetics RTP background image. Section line
marked in red relates to Figure 12.
Figure 12: Oblique section A showing results from hole THO25RCD014 and
historic drilling
O'Callaghans (Tungsten-Copper Deposit)
The O'Callaghan's deposit is a tungsten, copper, lead, and zinc sulphide
deposit located approximately 10km south-southeast of the Telfer mine and a
globally significant high grade tungsten deposit outside of China, and has
historically been listed as both a Reserve and Mineral Resource by Telfer's
previous owner, but was not declared as either a Reserve or a Mineral Resource
by Greatland in its March 2025 update (four months post-acquisition of Telfer)
as technical evaluations to support such classifications had not been
completed at that time.
A 1,200m diamond drill hole was completed to advance the understanding of the
structural architecture and geology beneath the deposit. The hole was
co-funded through the WA Government Exploration Incentive Scheme (EIS) and was
designed to test modelled magnetic anomalies and seismic reflectors beneath
the mineralised skarn. The drilling has provided valuable geological and
structural information that will support ongoing interpretation and
exploration work. Assay results from the program are pending.
Camp Dome
The Camp Dome prospect is a satellite copper-only oxide deposit located
approximately 20km north of the Telfer mine. The deposit was historically
reported as a Mineral Resource by Telfer's previous owner Newcrest Mining
Limited, but has not been declared as a Mineral Resource by Greatland until
adequate technical evaluation is conducted.
Drilling has commenced testing for extensions to primary copper mineralisation
below the oxide deposit. Two diamond holes and two pre-collars have been
completed for a total of 1,430m, partial assay results have received for two
holes.
Highlights to date include:
§ 44.4 m @ 0.32% Cu & 0.01g/t Au from 412m (CD25RCD003)
§ 7m @ 0.81% Cu & 0.02g/t Au from 106m (CD25DD002)
§ 19.8m @ 0.32% Cu & 0.01g/t Au from 147.8m CD25DD002
Although preliminary, results to date have confirmed grade continuity through
the supergene and primary mineralisation models, a full review will be
conducted when remaining assay results have been received. The program has
been temporary placed on hold until the end of the wet season, and it is
anticipated to resume in the June 2026 quarter.
Figure 13: Camp Dome plan view showing 2025 drilling and peak copper
intercepts on RTP magnetics
Figure 14: Oblique section A showing results from hole CD25DD002, historic
drilling and copper mineralisation interpretations
Figure 15: Oblique section B showing results from hole CD25RCD003, historic
drilling and copper mineralisation interpretations
Pinnacles
The Pinnacles prospect is located approximately 1km southeast of the West Dome
open pit, along the trend of the West Dome anticline structure (Figure 7).
Drilling is currently underway targeting the western limb of the Lower Limey
Unit (LLU) unit, host to multiple ore bodies at Telfer's West Dome and Main
Dome open pits and undergrounds, 1km along strike from previous drilling.
Paterson South Farm-In & Joint Venture
The Paterson South Project consists of seven exploration tenements which cover
a combined area of 1,080km(2) (shown in Figure 7).
The Paterson South Project is the subject of a farm-in and joint venture
arrangement between Greatland Paterson South Pty Ltd and Rio Tinto Exploration
Pty Limited (RTX), a subsidiary of Rio Tinto Limited (ASX/LSE:RIO), to
accelerate exploration across the tenure in the Paterson region
Farm-In milestone
During the December quarter, Greatland completed the Stage 1 Farm-In by
spending $7.1 million and completing drilling of at least 7,500m in aggregate,
earning a 51% interest in the Paterson South Project tenements and forming an
unincorporated joint venture with RTX over that project (Greatland 51% :
RTX 49%). Greatland is the joint venture manager.
RTX is currently considering whether to exercise its right to contribute to
its 51% share of future joint venture expenditure. If RTX does not exercise
this right, Greatland intends to sole fund the Stage 2 Farm-In requirements,
allowing Greatland to earn up to a 75% joint venture interest.
Teague
RC and diamond drill (DD) testing of geological, magnetic and structural
targets at the Teague prospect (Figure 16) was completed, with 3 holes drilled
for 1,240.1m.
Drilling targeted an interpreted anticlinal fold structure which hosts
mineralisation further along strike to the northwest at the Triangle prospect
(Figure 16). Three drill holes were completed in late 2024. Holes TRS002RCD
and TRS004RCD intersected zones of variably anomalous Au, Cu, Bi and As
mineralisation associated with brecciated, reef style quartz veining and
associated sericite, hematite and carbonate alteration. Three RC pre-collared
DD tailed holes were drilled to follow up this mineralisation.
Figure 16: Teague prospect, Triangle South; completed holes on reduced to pole
1st vertical derivative aeromagnetic image, with drill section lines in pink
Drilling successfully intersected similar style Au - Cu - As - Bi
mineralisation, associated with zones of massive to semi-massive pyrite rich
sulphide, with traces of arsenopyrite and chalcopyrite, observed within
sericite-carbonate altered, brecciated, stockwork quartz veined fine grained
sandstones.
Mineralised intercepts received to date include:
§ 8m @ 1.30g/t Au from 241m (incl. 3m @ 3.11 g/t Au from 241m) (TRS007RCD)
§ 15m @ 0.40g/t Au from 150m (incl. 4m @ 0.98g/t Au from 161m) (TRS007RCD)
§ 3m @ 0.65g/t Au from 385m (incl. 1m @ 1.58g/t Au from 385m) (TRS005RCD)
Results from drillhole TRS006RCD are pending.
Further detailed interpretation of the lithogeochemistry, pathfinder
anomalism, geology and structure will be completed once all assays are
returned.
Follow up work will be planned for testing of the continuity and orientation
of the mineralised zones intersected to date, with over 500m of strike between
the two drill lines completed at Teague by Greatland (Figure 16).
Mineralisation is open down and up dip, and along strike to the northwest and
southeast.
(Figure 16). Mineralisation is open down and up dip, and along strike to the
northwest and southeast.
Figure 17: Oblique section B showing results from hole TRS007RCD; interpreted
structures, anomalous assays and geology
Ernest Giles Project
Greatland's 100% owned Ernest Giles project (Figure 18) is located in the
Eastern Goldfields region of Western Australia, 250km northeast of Laverton.
Figure 18: Ernest Giles Project and Yamarna Belt location
Exploration work completed in 2025 was focused on the Meadows target area
situated in the south-east end of the Ernest Giles Greenstone belt. The
diamond drilling component of the program was completed during the quarter,
with 11 holes for 2,195.8m, giving a total of 20 RC and RCD holes for 7,479.1m
over several target areas, within the Meadows prospect.
Encouraging anomalous gold intersections have been returned from the recently
completed DD tails and are being analysed. Results include:
§ 9m @ 0.72g/t Au from 349m (EGD009) including;
- 3m @ 1.30 g/t Au from 349m; and
- 1m @ 2.43 g/t Au from 354m
Results for the last seven diamond core tails are still pending.
Mineralisation appears to be stratabound within ironstones (BIF) which dip at
~65(o) toward 025(o), matching the long axis of the IP anomaly and
approximating the magnetic trend (Figure 19).
It is likely that the drill line to the north did not intersect the
mineralised zone, as the zone is cut off by the younger cover sequence in hole
EGD011 on that line (Figure 19). The zone is open up-dip and to the north
and south. Follow up drill plans will be confirmed once all assays have been
returned and interpreted.
Figure 19:1 Meadows Prospect - showing schematic identified mineralisation in
BIFs in EGD009 on prioritised DD tails, existing drilling, geology and IP
anomalies
Figure 20: Meadows prospect, oblique section B showing results from hole
EGD007-009; looking 335(o); interpreted structures, geophysical models,
anomalous assays and geology
Contact
For further information, please contact:
Greatland Resources Limited
Shaun Day, Managing Director | Rowan Krasnoff, Chief Development Officer
info@greatland.com.au (mailto:info@greatland.com.au)
Nominated Advisor
SPARK Advisory Partners
Andrew Emmott / James Keeshan / Neil Baldwin | +44 203 368 3550
Corporate Brokers
Canaccord Genuity | James Asensio / George Grainger | +44 207 523 8000
RBC Capital Markets | James Agnew / Jamil Miah | Scott Redwood |
+44 207 029 0528
Media Relations
Australia - Fivemark Partners | Michael Vaughan | +61 422 602 720
About Greatland
Greatland is a gold and copper mining company listed on the Australian
Securities Exchange and London Stock Exchange's AIM Market (ASX:GGP and
AIM:GGP) and operates its business from Western Australia.
The Greatland portfolio includes the 100% owned Telfer mine, the adjacent 100%
owned brownfield world-class Havieron gold-copper development project, and a
significant exploration portfolio within the surrounding region. The
combination of Telfer and Havieron provides for a substantial and long life
gold-copper operation in the Paterson Province in the East Pilbara region of
Western Australia.
Forward Looking Statements
This document includes forward looking statements and forward looking
information within the meaning of securities laws of applicable jurisdictions.
Forward looking statements can generally be identified by the use of words
such as "may", "will", "expect", "intend", "plan", "estimate", "anticipate",
"believe", "continue", "objectives", "targets", "outlook" and "guidance", or
other similar words and may include, without limitation, statements regarding
estimated reserves and resources, certain plans, strategies, aspirations and
objectives of management, anticipated production, study or construction dates,
expected costs, cash flow or production outputs and anticipated productive
lives of projects and mines.
These forward looking statements involve known and unknown risks,
uncertainties and other factors that may cause actual results, performance and
achievements or industry results to differ materially from any future results,
performance or achievements, or industry results, expressed or implied by
these forward-looking statements. Relevant factors may include, but are not
limited to, changes in commodity prices, foreign exchange fluctuations and
general economic conditions, increased costs and demand for production inputs,
the speculative nature of exploration and project development, including the
risks of obtaining necessary licences and permits and diminishing quantities
or grades of reserves, political and social risks, changes to the regulatory
framework within which Greatland operates or may in the future operate,
environmental conditions including extreme weather conditions, recruitment and
retention of personnel, industrial relations issues and litigation.
Forward looking statements are based on assumptions as to the financial,
market, regulatory and other relevant environments that will exist and affect
Greatland's business and operations in the future. Greatland does not give any
assurance that the assumptions will prove to be correct. There may be other
factors that could cause actual results or events not to be as anticipated,
and many events are beyond the reasonable control of Greatland. Forward
looking statements in this document speak only at the date of issue. Greatland
does not undertake any obligation to update or revise any of the forward
looking statements or to advise of any change in assumptions on which any such
statement is based.
Competent Persons Statement
Information in the report pertaining to Telfer Resource Development
exploration results has been reviewed and approved by Mr Michael Thomson, a
Member of the Australian Institute of Geoscientists (AIG), who has more than
20 years relevant industry experience. Mr Thomson, an employee of the
Company, has sufficient experience relevant to the style of mineralisation,
type of deposit under consideration, and to the activity which he is
undertaking to qualify as a Competent Person as defined by the 2012 Edition
of the Australasian Code for Reporting of Exploration Results, Mineral
Resources and Ore Reserves (the JORC Code) and under the AIM Rules - Note for
Mining and Oil & Gas Companies, which outline standards of disclosure for
mineral projects. Mr Thomson consents to the inclusion in this announcement
of the matters based on this information in the form and context in which it
appears.
Information in the report pertaining to Regional Exploration results has been
reviewed and approved by Mr Damien Stephens, a Member of the Australian
Institute of Mining and Metallurgy (AusIMM)), who has more than 30 years
relevant industry experience. Mr Stephens, an employee of the Company, has
sufficient experience relevant to the style of mineralisation, type of deposit
under consideration, and to the activity which he is undertaking to qualify as
a Competent Person as defined by the 2012 Edition of the Australasian Code
for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the
JORC Code) and under the AIM Rules - Note for Mining and Oil & Gas
Companies, which outline standards of disclosure for mineral projects. Mr
Stephens consents to the inclusion in this announcement of the matters based
on this information in the form and context in which it appears.
Telfer Resource Development Drillhole Data and Au- Cu Significant
Intersections
Reporting Criteria: Intercepts reported are downhole drill width (not true
width) Au >0.5ppm (0.5g/t Au) and minimum 1m downhole width with maximum
consecutive internal dilution of 5m. Average grades are based on
length-weighting of samples grade, and only those intercepts with a gram
metres (Au_ppm x length) above 10 gram metres have been reported. Gold and
copper grades are reported to two significant figures, the downhole lengths
are rounded to 0.1m which may cause some apparent discrepancies in interval
widths. Underground samples are from core drilling which is NQ2 in diameter
while open pit samples are from reverse circulation (RC) drilling.
Regional Exploration Drillhole Data and Au- Cu Significant Intersections
Reporting Criteria: Intercepts reported are downhole drill width (not true
width) Au >0.2ppm (0.2g/t Au) for Telfer near mine exploration (Telfer
Expl.) and Au >0.1 g/t Au for other projects and minimum 0.1m downhole
width with maximum consecutive internal dilution of 5m. Average grades are
based on length-weighting of samples grade, and only those intercepts with a
gram metres (Au_ppm x length) above 1 gram metres have been reported. Gold and
copper grades are reported to two significant figures, the downhole lengths
are rounded to 0.1m which may cause some apparent discrepancies in interval
widths. Samples are from RC and diamond drilling both HQ and NQ diameter.
Intercepts reported for Camp Dome are downhole drill width (not true width) Cu
>0.3% Cu and minimum 0.1m downhole width with maximum consecutive internal
dilution of 5m. Average grades are based on length-weighting of samples grade,
and only those intercepts with widths a percent (%) metre (Cu % x length)
above 3% metres have been reported.
Table 1: Telfer Resource Development significant intercepts & drilling
data (Mine Grid)
Area HOLEID EAST NORTH RL Depth Dip Azimuth From Too Width Au ppm Cu pct Au (GM)
WDU WUC4550068 13072 58783 4421 391 9 273 323.0 350.1 27.1 3.23 0.95 88
WDU WUC4550068 13072 58783 4421 391 9 273 157.8 186.0 28.2 1.00 0.10 28
WDU WUC4550068 13072 58783 4421 391 9 273 239.0 249.8 10.8 1.54 0.11 17
WDU WUC4550081 13067 58782 4421 412 14 273 155.0 159.8 4.8 1.68 0.13 8
WDU WUC4550081 13067 58782 4421 412 14 273 309.0 333.0 24.0 1.18 0.09 28
WDU WUC4550081 13067 58782 4421 412 14 273 341.0 369.0 28.0 1.85 0.35 52
WDU WUC4550082 13065 58782 4422 398 9 268 233.5 243.0 9.5 1.37 0.05 13
WDU WUC4550082 13065 58782 4422 398 9 268 337.0 361.0 24.0 1.99 1.61 48
WDU WUC4550083 13066 58782 4421 466 17 268 154.7 161.3 6.7 1.88 0.39 12
WDU WUC4550083 13066 58782 4421 466 17 268 391.6 397.2 5.5 3.66 0.28 20
WDU WUC4550083 13066 58782 4421 466 17 268 335.0 391.6 56.6 2.28 1.23 129
WDU WUC4550084 13066 58782 4421 422 18 272 368.0 398.1 30.1 1.64 0.48 49
WDU WUC4550085 13067 58782 4421 447 23 272 416.0 423.2 7.15 2.32 0.13 17
WDU WUC4550085 13067 58782 4421 447 23 272 334.0 400.5 66.5 1.17 0.16 78
WDU WUC4550087 13059 58783 4422 427 13 264 332.0 347.8 15.8 5.01 0.23 79
WDU WUC4550087 13059 58783 4422 427 13 264 166.0 182.0 16.0 1.39 0.30 22
WDU WUC4550087 13059 58783 4422 427 13 264 311.0 319.0 8.0 2.60 0.07 21
WDU WUC4550087 13059 58783 4422 427 13 264 279.5 280.7 1.2 14.81 0.00 17
WDU WUC4550087 13059 58783 4422 427 13 264 385.0 387.3 2.3 4.95 0.17 11
WDU WUC4550092 13053 58783 4421 535 21 264 167.8 171.6 3.8 4.13 0.38 16
WDU WUC4550092 13053 58783 4421 535 21 264 440.2 447.1 6.8 2.28 0.26 16
WDU WUC4550092 13053 58783 4421 535 21 264 358.0 440.2 82.2 1.9 0.31 156
WDU WUC4550098 13044 58783 4422 450 8 251 322.5 335.7 13.2 0.91 0.03 12
WDU WUC4550098 13044 58783 4422 450 8 251 375.0 407.0 32 1.0 0.06 32
WDU WUC4550098 13044 58783 4422 450 8 251 344.0 349.0 5.0 5.67 0.01 28
WDU WUC4550102 13036 58784 4422 509 8 250 405.0 434.0 29.0 2.00 0.01 58
WDU WUC4550102 13036 58784 4422 509 8 250 350.0 361.6 11.6 2.97 1.13 34
WDU WUC4550102 13036 58784 4422 509 8 250 209.4 222.0 12.6 1.39 0.13 17
WDU WUC4550103 13036 58784 4422 553 16 252 238.0 253.0 15.0 3.41 0.11 51
WDU WUC4550103 13036 58784 4422 553 16 252 294.4 296.0 1.6 13.20 0.01 21
WDU WUC4550104 13037 58783 4422 539 20 252 426.7 482.0 55.3 7.44 0.43 411
WDU WUC4550104 13037 58783 4422 539 20 252 495.0 522.0 27.0 9.25 0.15 250
WDU WUC4550104 13037 58783 4422 539 20 252 213.9 222.3 8.5 3.04 0.16 26
WDU WUC4550104 13037 58783 4422 539 20 252 403.2 420.0 16.8 0.96 0.13 16
WDU WUC4550105 13037 58783 4422 506 11 251 262.5 312.7 50.2 2.78 0.36 140
WDU WUC4550105 13037 58783 4422 506 11 251 430.0 458.9 28.9 2.35 0.24 68
WDU WUC4550105 13037 58783 4422 506 11 251 320.0 326.0 6.0 1.87 0.07 11
WDU WUC4550109 13031 58783 4422 542 7 241 416.0 465.1 49.1 1.45 0.09 71
WDU WUC4550109 13031 58783 4422 542 7 241 470.7 473.0 2.3 8.56 0.10 20
Main Dome MUC4540086 11815 60394 4558 120 -44 172 49.0 98.8 49.8 1.20 0.07 60
Main Dome MUC4540093 11818 60387 4559 85 -60 8 28.0 45.0 17.0 3.07 0.09 52
Main Dome MUC4540096 11857 60350 4557 86 -43 272 28.0 50.1 22.1 1.78 0.31 39
Main Dome MUC4540090 11821 60388 4558 110 -63 316 67.0 97.0 30.0 1.27 0.13 38
Main Dome MUC4540090 11821 60388 4558 110 -63 316 34.0 38.0 4.0 8.88 0.59 36
Main Dome MUC4540083 11826 60391 4555 170 -7 41 0.0 9.7 9.7 3.55 0.34 34
Main Dome MUC4540076 11865 60295 4549 56 -72 103 26.0 36.0 10.0 2.89 0.87 29
Main Dome MUC4540078 11860 60286 4549 100 -63 192 8.3 28.2 19.9 1.35 0.62 27
Main Dome MUC4540095 11858 60353 4559 80 -83 285 70.0 77.5 7.5 3.48 1.04 26
Main Dome MUC4540084 11826 60392 4555 42 -6 71 0.7 11.8 11.1 2.29 0.05 25
Main Dome MUC4540093 11818 60387 4559 85 -60 8 51.0 61.3 10.3 2.27 0.12 23
Main Dome MUC4540094 11852 60357 4558 80 -79 296 26.3 34.0 7.7 2.69 0.38 21
Main Dome MUC4540098a 11854 60375 4557 105 -29 326 38.0 51.0 13.0 1.55 0.66 20
Main Dome MUC4540097 11859 60353 4559 80 -79 63 23.0 29.3 6.3 3.06 0.56 19
Main Dome MUC4540091 11819 60387 4559 77 -62 265 38.0 42.0 4.0 4.80 2.12 19
Main Dome MUC4540101 11838 60381 4559 64 -67 28 28.7 39.3 10.6 1.73 0.06 18
Main Dome MUC4540085 11827 60391 4557 84 -43 29 66.0 84.2 18.2 0.96 0.25 18
Main Dome MUC4540090 11821 60388 4558 110 -63 316 101.0 105.0 4.0 3.75 0.22 15
Main Dome MUC4540098a 11854 60375 4557 105 -29 326 87.6 99.2 11.6 1.21 0.02 14
Main Dome MUC4540095 11858 60353 4559 80 -83 285 23.0 30.0 7.0 1.79 0.57 13
Main Dome MUC4540086 11815 60394 4558 120 -44 172 105.0 120.0 15.0 0.78 0.11 12
Main Dome MUC4540076 11865 60295 4549 56 -72 103 7.1 15.1 7.9 1.47 0.28 12
Main Dome MUC4641017 11267 60291 4642 60 23 36 23.7 24.4 0.7 25.37 3.38 18
Main Dome MUC4641017 11267 60291 4642 60 23 36 49.5 56.8 7.4 1.48 0.44 11
Main Dome MUC4641018 11266 60291 4643 53 23 95 20.9 21.7 0.9 78.11 7.23 66
Main Dome MUC4648002 11246 60264 4649 74 30 100 67.9 72.0 4.1 2.95 0.12 12
Main Dome MUC4654021 11422 60133 4698 175 48 186 78.0 80.0 2.0 5.86 0.01 12
Main Dome MUC4681006 11655 60173 4684 90 23 33 86.9 88.0 1.1 54.67 0.13 60
Main Dome MUC4681009 11655 60173 4684 96 16 24 0.0 1.0 1.0 19.04 0.80 19
Main Dome MUC4681009 11655 60173 4684 96 16 24 76.8 77.8 1.0 19.61 1.19 19
Main Dome MUC4848027 11121 61031 4856 65 -42 85 45.0 53.0 8.0 6.65 0.88 53
Main Dome MUC4848029 11118 61031 4856 65 -58 99 20.0 49.0 29.0 1.67 0.28 48
Main Dome MUC4848021 11108 61027 4857 75 -84 273 34.0 64.0 30.0 1.53 0.11 46
Main Dome MUC4848026 11120 61027 4857 60 -86 87 28.0 57.0 29.0 1.47 0.12 43
Main Dome MUC4848003 11036 61016 4857 90 -38 125 74.0 81.0 7.0 5.91 0.55 41
Main Dome MUC4848024 11108 61030 4855 60 -38 90 52.0 59.1 7.1 5.76 2.38 41
Main Dome MUC5066061 11110 61115 5057 210 76 266 161.1 175.0 13.9 2.82 1.07 39
Main Dome MUC4848030 11127 61029 4857 70 -82 278 29.0 50.0 21.0 1.56 0.11 33
Main Dome MUC4848007 11081 61023 4856 68 -80 297 53.4 67.0 13.6 2.32 0.17 32
Main Dome MUC4848012 11077 61024 4856 70 -72 280 50.3 69.0 18.7 0.95 0.21 18
Main Dome MUC4848031 11139 61028 4857 70 -82 275 38.0 45.0 7.0 2.24 0.14 16
Main Dome MUC4848031 11139 61028 4857 70 -82 275 52.4 70.0 17.6 0.81 0.11 14
Main Dome MUC4848007 11081 61023 4856 68 -80 297 36.0 38.2 2.2 5.46 0.05 12
Main Dome MUC4848024 11108 61030 4855 60 -38 90 30.0 31.0 1.0 10.38 0.09 10
Main Dome MUC4848004 11040 61012 4858 67 -70 290 53.0 66.0 13.0 0.78 0.05 10
West Dome WR28748 12882 58057 5524 308 63 53 273.0 308.0 35.0 4.76 0.30 167
West Dome WR24227 12421 58500 5503 240 90 326 168.0 190.0 22.0 2.95 0.33 65
West Dome WR27230 12726 58448 5204 192 57 211 10.0 59.0 49.0 0.95 0.09 47
West Dome WR24226 12423 58474 5505 258 90 357 146.0 184.0 38.0 1.09 0.27 42
West Dome WR39551 13950 58851 5504 210 79 95 147.0 192.0 45.0 0.91 0.07 41
West Dome WR39552 13960 58883 5496 216 75 94 121.0 162.0 41.0 0.99 0.02 41
West Dome WR25707 12573 58140 5523 414 56 74 403.0 414.0 11.0 3.23 0.10 36
West Dome WR39219 13923 58886 5496 240 82 270 159.0 201.0 42.0 0.84 0.21 35
West Dome WR40079 14008 58852 5496 240 84 96 166.0 202.0 36.0 0.97 0.24 35
West Dome WR39554 13951 58787 5505 204 76 95 58.0 78.0 20.0 1.63 0.07 33
West Dome WR30777 13071 58251 5315 156 90 177 98.0 108.0 10.0 3.14 0.12 31
West Dome WR31281 13124 58391 5251 125 89 127 1.0 6.0 5.0 5.98 0.28 30
West Dome WR38554 13872 58811 5504 150 70 273 88.0 90.0 2.0 12.15 0.47 24
West Dome WR27595 12753 58415 5204 120 78 272 28.0 66.0 38.0 0.63 0.07 24
West Dome WR40737 14076 58814 5497 258 68 95 168.0 210.0 42.0 0.55 0.02 23
West Dome WR38230 13821 58797 5504 135 90 170 64.0 77.0 13.0 1.77 0.06 23
West Dome WR31766 13170 58284 5306 184 75 94 44.0 48.0 4.0 5.41 0.07 22
West Dome WR31169 13107 58311 5289 183 74 360 85.0 104.0 19.0 1.12 0.09 21
West Dome WR40736 14071 58849 5504 252 73 101 167.0 187.0 20.0 1.03 0.03 21
West Dome WR38555 13869 58772 5504 60 74 273 26.0 57.0 31.0 0.66 0.01 21
West Dome WR33156 13310 58327 5301 150 63 18 58.0 79.0 21.0 0.95 0.06 20
West Dome WR33157 13309 58327 5301 150 81 358 49.0 63.0 14.0 1.40 0.04 20
West Dome WR39226 13928 59106 5504 180 57 274 27.0 33.0 6.0 3.26 0.00 20
West Dome WR38228 13824 58851 5504 200 90 353 166.0 190.0 24.0 0.75 0.06 18
West Dome WR39555 13947 58771 5505 222 68 95 122.0 138.0 16.0 1.10 0.12 18
West Dome WR31766 13170 58284 5306 184 75 94 96.0 115.0 19.0 0.90 0.02 17
West Dome WR33156 13310 58327 5301 150 63 18 43.0 48.0 5.0 3.41 0.02 17
West Dome WR41053 14102 58866 5497 230 55 96 160.0 162.0 2.0 8.50 0.28 17
West Dome WR41242 14126 58843 5496 246 56 93 106.0 127.0 21.0 0.77 0.03 16
West Dome WR28575 12846 58714 5411 390 73 275 130.0 144.0 14.0 1.14 0.01 16
West Dome WR39058 13903 58883 5504 240 79 94 198.0 218.0 20.0 0.79 0.18 16
West Dome WR39227 13928 59107 5504 180 78 277 110.0 114.0 4.0 3.91 0.01 16
West Dome WR28752 12874 58811 5420 190 73 284 60.0 68.0 8.0 1.92 0.01 15
West Dome WR25050 12511 58202 5521 432 74 79 214.0 221.0 7.0 2.12 0.13 15
West Dome WR25117 12516 58197 5522 400 75 73 384.0 398.0 14.0 1.05 0.04 15
West Dome WR28264 12821 58680 5408 330 76 290 268.0 287.0 19.0 0.77 0.01 15
West Dome WR39553 13950 58786 5505 222 84 91 34.0 40.0 6.0 2.42 0.01 15
West Dome WR39552 13960 58883 5496 216 75 94 43.0 52.0 9.0 1.58 0.02 14
West Dome WR41243 14123 58810 5496 300 73 103 224.0 239.0 15.0 0.94 0.10 14
West Dome WR40226 14021 58866 5497 204 90 260 163.0 187.0 24.0 0.58 0.03 14
West Dome WR26305 12633 58100 5524 330 66 80 256.0 264.0 8.0 1.72 0.58 14
West Dome WR27911 12801 58677 5406 366 74 293 239.0 247.0 8.0 1.71 0.26 14
West Dome WR41053 14102 58866 5497 230 55 96 66.0 84.0 18.0 0.76 0.03 14
West Dome WR33250 13319 58346 5300 180 90 311 50.0 75.0 25.0 0.54 0.04 14
West Dome WR40557 14054 58817 5497 233 84 101 218.0 233.0 15.0 0.90 0.02 14
West Dome WR25050 12511 58202 5521 432 74 79 309.0 316.0 7.0 1.92 0.04 13
West Dome WR39735 13977 58778 5504 258 81 97 72.0 85.0 13.0 1.03 0.04 13
West Dome WR30777 13071 58251 5315 156 90 177 53.0 64.0 11.0 1.19 0.09 13
West Dome WR28752 12874 58811 5420 190 73 284 142.0 146.0 4.0 3.16 0.14 13
West Dome WR33250 13319 58346 5300 180 90 311 37.0 42.0 5.0 2.50 0.26 12
West Dome WR38058 13800 58810 5504 160 65 273 80.0 90.0 10.0 1.24 0.04 12
West Dome WR30628 13062 58305 5285 190 71 360 109.0 121.0 12.0 1.03 1.00 12
West Dome WR38716 13899 58924 5497 144 59 100 90.0 107.0 17.0 0.72 0.02 12
West Dome WR38716 13899 58924 5497 144 59 100 36.0 44.0 8.0 1.47 0.00 12
West Dome WR30628 13062 58305 5285 190 71 360 80.0 96.0 16.0 0.73 0.09 12
West Dome WR40907 14099 58855 5497 234 69 101 143.0 155.0 12.0 0.96 0.02 12
West Dome WR41053 14102 58866 5497 230 55 96 131.0 149.0 18.0 0.64 0.01 11
West Dome WR40076 13998 58850 5496 180 76 271 114.0 130.0 16.0 0.71 0.15 11
West Dome WR40557 14054 58817 5497 233 84 101 16.0 28.0 12.0 0.92 0.00 11
West Dome WR39555 13947 58771 5505 222 68 95 184.0 202.0 18.0 0.61 0.07 11
West Dome WR28264 12821 58680 5408 330 76 290 254.0 262.0 8.0 1.37 0.36 11
West Dome WR39056 13897 58784 5505 210 77 97 197.0 203.0 6.0 1.81 3.15 11
West Dome WR25117 12516 58197 5522 400 75 73 214.0 219.0 5.0 2.10 0.07 11
West Dome WR30628 13062 58305 5285 190 71 360 33.0 49.0 16.0 0.65 0.05 10
West Dome WR26306 12633 58101 5524 330 77 81 290.0 298.0 8.0 1.29 0.06 10
West Dome WR40076 13998 58850 5496 180 76 271 68.0 72.0 4.0 2.58 0.03 10
West Dome WR27230 12726 58448 5204 192 57 211 2.0 4.0 2.0 5.14 0.03 10
Table 2: Regional Exploration significant intercepts & drilling data (GDA
2020 zone 51)
Area HOLEID EAST NORTH RL Depth Dip Azimuth From Too Width Au ppm Cu pct Au (GM) Area
Telfer Expl. Big Tree BT25DD001 435,188 7,579,817 290 294 -69 210 110.62 116 5.38 1.6 0.01 8.61
Telfer Expl. Big Tree BT25DD001 435,188 7,579,817 290 294 -69 210 112.65 112.9 0.25 33.2 0.01 8.3
*including
Telfer Expl. Big Tree BT25DD001 435,188 7,579,817 290 294 -69 210 123 124 1 1.82 0 1.82
Telfer Expl. Big Tree BT25DD002 435,583 7,579,726 279 348 -73 205 124 149 25 0.24 0.01 6
Telfer Expl. Big Tree BT25DD002 435,583 7,579,726 279 348 -73 205 137 137.6 0.6 1.78 0.05 1.07
Telfer Expl. Big Tree BT25DD002 435,583 7,579,726 279 348 -73 205 148.7 149 0.3 2.8 0.01 0.84
Telfer Expl. Big Tree BT25DD004 436,306 7,579,207 280 450 -56 20 97.8 98.1 0.3 3.36 0.12 1.01
Telfer Expl. Big Tree BT25DD004 436,306 7,579,207 280 450 -56 20 138.5 145.1 6.6 0.55 0.07 3.63
Telfer Expl. Big Tree BT25DD004 436,306 7,579,207 280 450 -56 20 144.2 145.1 0.9 3.36 0.09 3.02
*including
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 196.8 197.1 0.3 3.8 0.01 1.14
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 255 263.05 8.05 0.25 0.1 2.01
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 255.6 256.1 0.5 2.59 0.06 1.3
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 311.5 311.7 0.2 4.98 0.01 1
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 318.4 321.3 2.9 2.35 0.06 6.82
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 348.8 353.4 4.6 0.3 0.15 1.38
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 377.1 386.9 9.8 0.41 0.03 4.02
Telfer Expl. Thomsons THO25DD013 408,295 7,609,326 281 404 -58 127 379.8 380.35 0.55 2.58 0.13 1.42
*including
Telfer Expl. Thomsons THO25RCD014 408,515 7,609,849 276 510 -57 284 66 70 4 0.47 0.01 1.88
Telfer Expl. Thomsons THO25RCD014 408,515 7,609,849 276 510 -57 284 385 385.5 0.5 6.03 0.01 3.02
Telfer Expl. Thomsons THO25RCD014 408,515 7,609,849 276 510 -57 284 437.98 438.22 0.24 6.85 0.01 1.64
Telfer Expl. Thomsons THO25RCD014 408,515 7,609,849 276 510 -57 284 478.08 478.7 0.62 35.06 0.04 21.74
Telfer Expl. Camp Dome CD25DD002 416,970 7,612,402 270 676 -55 43 106 113 7 0.02 0.81 0.14
Telfer Expl. Camp Dome CD25DD002 416,970 7,612,402 270 676 -55 43 147.8 167.6 19.8 0.01 0.32 0.2
Telfer Expl. Camp Dome CD25RCD003 417,198 7,612,213 269 586 -60 205 412.8 457.2 44.4 0.01 0.32 0.44
Telfer Expl. Camp Dome CD25RCD003 417,198 7,612,213 269 586 -60 205 547.1 556.05 8.95 0.02 0.39 0.18
Pat Sth JV Teague TRS005RCD 451,783 7,588,638 255 138 -65 210 385 388 3 0.65 .01 1.95
Pat Sth JV Teague TRS006RCD 451,539 7,588,286 245 204 -60 30 Diamond tail assays awaited
Pat Sth JV Teague TRS007RCD 452,046 7,588,048 247 150 -60 30 130 139 9 0.2 0.02 1.8
Pat Sth JV Teague TRS007RCD 452,046 7,588,048 247 150 -60 30 150 165 15 0.4 0.01 6
Pat Sth JV Teague TRS007RCD *including 452,046 7,588,048 247 150 -60 30 161 165 4 0.98 0.01 3.92
Pat Sth JV Teague TRS007RCD 452,046 7,588,048 247 150 -60 30 241 249 8 1.3 0.01 10.4
Pat Sth JV Teague TRS007RCD *including 452,046 7,588,048 247 150 -60 30 241 244 3 3.11 0.02 9.33
Pat Sth JV Atlantis 25ATL002RCD 455590 7620615 314 657.2 -80 180 502 505 3 0.52 0.00 1.56
Pat Sth JV Atlantis 25ATL002RCD *including 455590 7620615 314 657.2 -80 180 504 505 1 1.32 0.00 1.32
Pat Sth JV Atlantis 25ATL003RCD 455661 7621672 327 120 -80 180 Diamond tail not assayed
Ernest Giles Meadows EGD009 601,386 7,015,985 490 246 -65 248 349 358 9 0.72 0.01 6.48
Ernest Giles Meadows EGD009 *including 601,386 7,015,985 490 246 -65 248 349 352 3 1.30 0.00 3.9
Ernest Giles Meadows EGD009 *including 601,386 7,015,985 490 246 -65 248 357 358 1 2.43 0.01 2.43
JORC 2012 Table 1 Telfer Resource Development: Section 1 - Sampling Techniques
and Data
Criteria Commentary
Sampling techniques Resource definition drilling at Telfer involves a combination of reverse
circulation (RC) and diamond drilling throughout the mining period. For
diamond drilling, samples are taken according to lithological boundaries, with
geologists defining sample intervals and selecting the assay methodology.
Historically, high-grade reef samples were sent for screen fire assay, while
other samples underwent fire assay for gold and additional elements.
Core sizes for resource drilling usually range from NQ to PQ, while smaller
sizes (NQ or LTK60) are used for grade control. Diamond drilling typically
samples lithological units with lengths between 0.2 to 1.2 meters, with
1-meter intervals being most common and they are barcoded and submitted for
laboratory analysis.
Historically, RC drilling typically produces 1-meter samples, from which a 2-5
kg sub-sample is taken using a riffle splitter, then pulverised for gold
assay. Earlier RC drilling involved samples from 0.5-meter to 2-meter
intervals, with the small intervals were used to target reefs. Recent RC
drilling for resource definition uses 1-meter intervals and split using cone
splitter from which a 2-5 kg sub-sample is taken with bulk reject material
stored temporarily. While grade control uses 2-meter intervals and split using
cone splitter. All RC drilling has field duplicates conducted at a 1:20 ratio.
Rock chip samples, collected manually from exposed development faces, are
typically 2-3 kg, collected perpendicular to bedding, and include all relevant
domains (reef, hanging wall, footwall). These samples are stored in
pre-numbered bags for analysis.
Drilling techniques Drilling at the Telfer has evolved over time, following industry-standard
protocols. Before 1998, drilling targeted mainly previously mined areas, while
from 1998 to 2002, diamond drilling formed the primary data source for current
Mineral Resource estimates, supplemented by RC drilling. Currently, RC
drilling is the primary data source for the open pit resources and diamond
drilling for underground resources.
Currently, NQ2 is the dominant drill size for diamond drilling and RC Drilling
is drilled with a pre-collar of 143mm then reduced to 134mm diameter.
Additional core sizes, including NQ, HQ, HQ3, LTK60, and limited PQ and BQ,
have also been used at Telfer. LTK60 and BQ have mainly been used for grade
control. The Reflex orientation tool is used by drillers, with all core
being oriented using Ezy-Mark to mark the bottom of the hole. The core is then
re-constructed in V-Rail, where the orientation line is drawn along the core
Drill sample recovery Core recovery data from diamond drilling is systematically recorded by
comparing drillers' depth blocks with database records and is stored in the
geological database. If excessive core loss occurs, a wedge hole is often
drilled to recover the lost interval. A review in 2019 confirmed no
significant relationship between sample recovery and grade for either core or
RC samples, with high core recovery minimising potential loss effects.
Following the review, weighing each RC sample at the rig was implemented to
ensure consistent sample support in resource estimation.
Logging Geological logging is conducted for all diamond and reverse circulation (RC)
drill holes, capturing lithology, alteration, mineralisation, veining, and
structure (for diamond core). Diamond drill holes are also quantitatively
logged for veining, vein percentage, and structure. All drill core is
photographed before sampling, using either slide film or digital cameras.
Logged data is validated before merging into the database, which contains over
1,000 km of logged geology, covering approximately 80% of total drilling. Rock
Quality Designation (RQD) is routinely recorded, with around 900 diamond holes
geotechnically assessed. The level of logging detail is appropriate for
resource estimation and related studies.
Sub-sampling techniques and sample preparation Sampling and quality control procedures are designed for the material being
tested. Geologists define sample intervals to avoid crossing key lithological
contacts and select appropriate assay methods. Diamond core is typically
sampled as half-core, while RC samples are collected dry, with conditions
recorded. Since 2015, cone splitters have replaced riffle splitters for RC
sampling, with field duplicates taken at a 1:20 ratio.
Core samples are processed through drying, crushing, and pulverising, with
historical standards requiring 90% passing 75 µm. Older RC drilling used
0.5-2 m intervals, while recent resource definition drilling follows 1 m
intervals (2 m for grade control), with a 5 kg primary split collected.
Samples are prepared at the Telfer lab, where they are crushed, sub-split, and
pulverised to 95% passing 106 µm. Gold is analysed via 30 g fire assay, while
base metals, sulphur, and arsenic are tested by ICP. Cyanide-soluble copper is
determined by bottle roll leach with AAS analysis. To ensure accuracy, 1 in 20
samples undergo external lab verification.
Quality of assay data and laboratory tests Assay and quality control protocols at the Telfer deposit have evolved to
align with industry standards. Before 1998, quality control procedures
followed industry norms of the time, with no major concerns identified. From
1998 onwards, protocols were enhanced, particularly during prefeasibility and
feasibility studies conducted between 1998 and 2002.
Samples are primarily prepared at the Telfer laboratory and then sent to
external commercial labs for analysis. Currently, all resource definition
samples have been assayed through a combination of the Telfer Laboratory and
the Bureau Veritas (BV) Commercial Lab in Perth and all grade control samples
have been sent through Telfer Laboratory. Gold is analysed using fire assay,
while multi-element analyses-including silver, arsenic, bismuth, copper, iron,
nickel, lead, sulphur, and zinc-are conducted using ICP techniques.
Cyanide-soluble copper is assessed via bottle roll leach with AAS analysis.
Since 1998, comprehensive quality control measures have been in place,
including the use of Certified Reference Materials (CRMs), blanks, duplicate
assays, blind pulp re-submissions and checks at independent laboratories.
Matrix-matched CRMs were introduced in 1999, and transition to multi client
CRMs in 2018. Since 2000, Telfer's laboratory was managed by commercial
organisations until Telfer re-opening in 2002 has been managed by Newcrest and
now, Greatland.
Regular reviews of Quality Assurance and Quality Control (QAQC) procedures,
including sample resubmissions and bias assessments, help ensure data accuracy
and reliability. Monthly reports document any anomalies, with corrective
actions taken as needed. Comparison studies, including analyses of duplicate
pulp samples sent to external laboratories, confirm data precision, with a 90%
repeatability rate. The QAQC protocols and assay techniques used are
considered reliable for Mineral Resource estimation.
During the 2002 feasibility study, 13,570 pulp duplicate samples were
dispatched from the Telfer preparation laboratory for analysis at a check
laboratory. Insignificant bias was identified between the original and check
laboratories for gold (-0.8%) and copper (0.5%).
Verification of sampling and assaying Drill hole data is securely stored in an acQuire database, with stringent
controls to ensure data integrity and prevent errors or duplication. Data
collection, including collar coordinates, drill hole designation, logging, and
assaying, follows strict protocols to maintain accuracy. Validation involves
multiple stages, with input from geologists, surveyors, assay laboratories,
and down-hole surveyors where applicable.
Data entry has evolved from manual methods to direct digital input,
incorporating automated validation checks. Internal and external reviews
further enhance data quality before resource estimation. Resource data is
managed daily by site geologists, with additional verification by a
centralised resource team.
Sampling details are recorded digitally, utilising barcode and tracking
systems to monitor sample integrity throughout the process. Recent drilling
programs employ numbered bags for tracking consistency. Regular audits of both
internal and commercial laboratories ensure compliance with quality standards.
No assay data adjustments have been made in the Mineral Resource estimate.
Location of data points Mining operations at Telfer Gold Mine adhere to periodic reporting
requirements for the WA Department of Mines, Industry Regulation and Safety
(DMIRS), using the MGA94/AHD coordinate system for official submissions.
However, site operations utilise the Telfer Mine Grid (TMG) and Telfer Height
Datum (THD), requiring coordinate transformations between the national and
operational coordinate systems.
This has been supplied by AAM Surveys in 1995 (AMG84 to Telfer Mine Grid) and
AAMHATCH in February 2007 (Telfer Mine Grid to MGA Transformation). Both
reports also addressed the height datum and in 2007 established the THD=AHD +
5193.7m.
A local grid covers the whole of the Telfer mine area (Telfer Mine Grid 2002).
It is oriented with grid north at 44o03'12' west of magnetic north.
Topographic control is maintained through a combination of surface and aerial
surveys, with routine updates for pits and underground voids. Drill hole
collars are surveyed upon completion by mine surveyors. The natural surface
topography, along with current pit surveys and underground voids (development,
stopes and vertical openings) are used to deplete the resources and account
for changes in mining areas at Telfer.
Downhole survey methods have evolved over time, progressing from early
single-shot cameras to modern electronic tools. Currently, drilling programs
include multi-shot surveys at regular intervals, with post-completion surveys
conducted at finer resolutions. Specific drilling campaigns may incorporate
gyroscopic surveys where required. Routine in-pit drilling, particularly for
pre-production and grade control, typically excludes downhole surveys, relying
on collar surveys for accuracy.
Data spacing and distribution The drill hole spacing is sufficient to demonstrate geological continuity
appropriate for the Mineral Resource and the classifications applied under the
2012 JORC Code.
The drill spacing applied to specific domains within the overall resource is
variable and is considered suitable for the style of mineralisation and
mineral resource estimation requirements.
Orientation of data in relation to geological structure The Telfer mine site topography is dominated by two large scale asymmetric
dome structures with steep west dipping axial planes. Main Dome is in the
southeast portion of the mine and is exposed over a strike distance of 3 km
north-south and 2 km east-west before plunging under transported cover. West
Dome forms the topographical high in the northwest quadrant of the mine and
has similar dimensions to Main Dome. Both fold structures have shallow to
moderately dipping western limbs and moderate to steep dipping eastern limbs.
Surface drilling is orientated to ensure optimal intersection angle for the
reefs. Underground drilling orientation may be limited by available collar
locations, but acceptable intersection angles are considered during the drill
hole planning process. No orientation bias has been indicated in the
drilling data.
Sample security Sample security is maintained through a tracking system from drilling to
database entry. While barcoding was previously used, it has been replaced with
pre-numbered calico bags for resource development and underground drilling
samples.
All sample movements, including dispatch details, drill hole identification,
sample ranges, and analytical requests, are recorded in a database. Any
discrepancies identified upon receipt by the laboratory are validated to
ensure data integrity.
Audits or reviews In-house reviews of data, QAQC results, sampling protocols and compliance with
corporate and site protocols are carried out at various frequencies by company
employees not closely associated with the Telfer projects. Procedure audits
and reviews are carried out by corporate employees during site visits.
JORC 2012 Table 1 Telfer Resource Development: Section 2- Reporting of
Exploration Results
Criteria Commentary
Mineral tenement and land tenure status Mining and ore processing at Telfer operate under granted leases and licenses
covering all key infrastructure, including open pits, underground resources,
processing facilities, waste storage, and support services. The Telfer Main
Dome Underground Mineral Resource is within mining leases M45/6 and M45/8,
while the West Dome Mineral Resource, approximately 3km northwest of the Main
Dome open pit, lies within leases M45/7 and M45/33. These leases are currently
under renewal.
An Indigenous Land Use Agreement (ILUA) has been in place since December 2015,
covering all operational aspects of the site. Telfer operations also remain
compliant with the Mining Rehabilitation Fund (MRF) levy.
Exploration done by other parties The Telfer district was first geologically mapped by the Bureau of Mineral
Resources in 1959, though no gold or copper mineralization was identified. In
1971, regional sampling by Day Dawn Minerals NL detected anomalous copper and
gold at Main Dome. From 1972 to 1975, Newmont Pty Ltd conducted extensive
exploration and drilling, defining an open pit reserve primarily in the Middle
Vale Reef.
In 1975, BHP Gold acquired a 30% stake in the project, and in 1990, Newmont
and BHP Gold merged their Australian assets to form Newcrest Mining Limited.
Newcrest managed exploration and resource drilling from 1990 until its
acquisition by Newmont Corp on November 6, 2023. Newmont later divested
Telfer, selling it to Greatland Gold on December 4, 2024, which now oversees
exploration and drilling activities.
Geology Telfer is located within the northwestern Paterson Orogen and is hosted by the
Yeneena Supergroup, a 9 km thick sequence of marine sedimentary rocks. Gold
and copper mineralization occurs in stratiform reefs and stockworks within the
Malu Formation of the Lamil Group, controlled by both structure and lithology.
Mineralisation styles include high-grade narrow reefs, reef stockwork
corridors, sheeted vein sets, and extensive low-grade stockwork, which forms
most of the sulphide resource. Sulphide mineralisation consists mainly of
pyrite and chalcopyrite, with copper minerals including chalcopyrite,
chalcocite, and bornite. Gold is primarily free-grained or associated with
sulphides and quartz/dolomite gangue, with a correlation between vein density
and gold grade.
The highest gold and copper grades occur within bedding sub-parallel reef
systems, including multiple reef structures in Main Dome, such as E-Reefs,
MVR, M10-M70 reefs, A-Reef, and B-Reefs (notably B30). Additional
mineralisation occurs in northwest-trending and north-dipping veins. Stockwork
mineralisation, found in open pits, Telfer Deeps, and the Vertical Stockwork
Corridor (VSC), is best developed in the axial zones of Main Dome and West
Dome, often extending over large areas (0.1 km to 1.5 km). It can include
brecciated zones filled with quartz, carbonate, and sulphides
Drill hole Information Refer to Table 4 - Significant Intercepts.
Data aggregation methods Significant assay intercepts are reported using length-weighted averages based
on predefined thresholds, with a maximum allowable internal dilution.
For Open pit (RC) significant intercepts a maximum of 5m of internal dilution,
minimum width of 3m, minimum grade of 0.5g/t and a gram metre (grade x length)
of greater than 10gm.
For Underground diamond significant intercepts a maximum of 5m of internal
dilution, minimum width of 1m, minimum grade of 0.5g/t and a gram metre (grade
x length) of greater than 10gm.
Relationship between mineralisation widths and intercept lengths Significant assay intervals represent apparent widths, as drilling is not
always perpendicular to the dip of mineralisation. True widths are typically
less than downhole widths and can only be estimated once all results are
received and final geological interpretations are completed. Where access
permits all holes are drilled to intercept as close to true width as possible.
Diagrams As provided
Balanced reporting This is the third quarterly report released by the Greatland group since
taking ownership of the Telfer mine. Drilling results will be reported
regularly and released to the market
Earlier reporting of exploration programs conducted by Newcrest and Greatland
have previously been reported. Drilling programmes are ongoing and further
material results will be reported in subsequent releases.
Other substantive exploration data NIL
Further work Drilling is ongoing with further work is planned to evaluate exploration
opportunities that extend the known mineralisation.
JORC 2012 Table 1 Telfer and Regional Exploration: Section 1 - Sampling
Techniques and Data
Criteria Commentary
Sampling techniques All current samples are obtained from either reverse circulation (RC) or
diamond drilling.
Diamond core (PQ-HQ and NQ) was cut using an automated core saw and sampled as
half core.
Predominately 1m samples were obtained, but lengths range from 0.2 metre to
1.2 metre if adjusted to geological or major alteration boundaries. All
available drill core was sampled.
RC samples were collected off the drill rig as one (1) metre intervals or two
(2) metre composites. Samples are split using a cone splitter from which a
2-5kg sub sample is taken. All RC drilling has duplicates collected at a
1:20 ratio.
Historical sampling includes RC, Diamond and Air Core (AC) sampling
Drilling techniques Diamond core drilling was from surface with PQ3, HQ3 and NQ2 diameter coring
configuration and from RC pre-collars, generally starting with HQ3 and ending
in NQ2.
Core from drill holes is orientated on 1.5m, 3m and 6m runs using an Axis
CHAMP ORI™ orientation tool. At the end of each run, the bottom of hole
position is marked by the driller, which is later transferred to the whole
drill run core run length with a bottom hole reference line.
Drill sample recovery RC sample recovery is visually assessed and recorded for each sample. RC
sample recoveries are generally high, no significant sample loss has been
recorded. Sample condition is also recorded, the majority were dry, with
only minor intervals of moist or wet samples recorded. RC sampling generally
ceases once the samples become consistently wet.
Core recovery is systematically recorded from the commencement of coring to
end of hole by reconciling against drillers depth blocks in each core tray
with data recorded in the database. Driller's depth blocks provided the
depth, interval of core recovered, and interval of core drilled.
Core recoveries were 95 - 100%.
Logging All core and RC samples were geologically logged by geologists and are
considered to have been logged in appropriate detail to support Mineral
Resource estimation, mining studies and metallurgical studies. Basic
geotechnical logging of RQD was completed by field technicians or geologists.
RC chips were qualitative and quantitative in nature. Lithology and
alteration were logged qualitatively; mineralisation was logged
quantitatively. Chip trays were photographed both dry and wet.
Core logs were qualitative and quantitative in nature. Lithology and
alteration were logged qualitatively; mineralisation, veining, structure and
geotechnical data (RQD) were logged quantitatively. Core was photographed
both dry and wet after metre marking and orientation.
100% of all recovered core and RC samples were logged in the targeted
stratigraphy.
Magnetic susceptibility, sometimes with conductivity measurements were
recorded every metre using a KT20 or KT10 machine. Bulk density of selected
drill core intervals was determined at site on whole core samples using the
Archimedes method. Regional RC & DD samples at Ernest Giles, Chilly and
Teague were generally analysed with a Canon pXRF unit on a metre basis
Logging information was digitally recorded and validated prior to import into
an acQuire or custom SQL database.
Sub-sampling techniques and sample preparation RC samples were cone split at the rig as either 1 metre or 2 metre intervals.
Sample size ranged between 3 and 5kg. The size is considered appropriate for
the style of mineralisation.
All sampled core was cut with an automatic core saw in a consistent way that
preserved the bottom of hole reference line, where present. Half core was used
for normal sampling and quarter core for field duplicates. Samples were
collected in pre-numbered calico bags mostly 1 metre in length, but also
ranged from 0.2m to 1.5m. Sample weights typically varied from 0.5kg to
7kg. Sample sizes are considered appropriate for the style of
mineralisation.
Assaying quality control procedures consisted of the inclusion of certified
reference material (CRM) and blank samples at an insertion rate of 1:20 and
1:40 respectively. Duplicate samples were collected from crush and pulp
samples at a rate of 1:20.
All samples were freighted by road to Intertek Laboratory, Perth (Intertek).
Samples from Ernest Giles were freighted to Kalgoorlie for sample prep, then
Perth for wet chemical assay.
Samples were dried at 105(o)C, and the bulk of the samples pulverised (using
LM5) to produce a pulped product with minimum standard of 95% passing 106µm.
Oversize primary samples were crushed and a 3kg subsample then milled with the
LM5 mill. Routine grind size analysis is conducted.
Quality of assay data and laboratory tests Assaying of drill core samples was conducted at Intertek. All samples were
assayed for 48 elements using a 4-acid digestion followed by ICP+MS/OES
finish. MS determination (method 4A/MS907), which is considered to provide a
total assay for copper.
Gold analyses were determined by 50g fire assay with AAS finish (method
FA50N/AA), which is considered to provide a total assay for gold.
Sampling and assaying quality control procedures consisted of inclusion of
certified reference material (CRMs), coarse residue and pulp duplicates with
each batch (at least 1:20). Assays of quality control samples were compared
with reference samples in the database and verified as acceptable prior to use
of data from analysed batches.
Laboratory quality control data, including laboratory standards, blanks,
duplicates, repeats and grind size results are captured in the SQL databases
and assessed for accuracy and precision for recent data.
Analysis of the available quality control sample assay results indicates that
an acceptable level of accuracy and precision has been achieved and the
database contains no analytical data that has been numerically manipulated.
The assaying techniques and quality control protocols used are considered
appropriate for the data to be used for reporting exploration drilling
results.
Verification of sampling and assaying Sampling intervals defined by the geologist are electronically assigned sample
identification numbers prior to core cutting. Corresponding sample numbers
matching pre-labelled calico bags are assigned to each interval.
All sampling and assay information were stored in a secure database with
restricted access.
Electronically generated sample submission forms providing the sample
identification number accompany each submission to the laboratory. Assay
results from the laboratory with corresponding sample identification are
loaded directly into the database.
No twinned holes have been completed.
There are no currently known drilling, sampling, recovery, or other factors
that could materially affect the accuracy or reliability of the data.
Location of data points Drill collar locations were surveyed using a differential Trimble R10
differential GPS with RTK with a stated accuracy of +/- 0.01m accuracy or
handheld Garmin 67/66i GPS with an accuracy of +/- 5m.
Drill rig alignment was attained using a REFLEX TN14 GYROCOMPASS™. Downhole
survey was collected every 6m and 30m using a Reflex OMNIx™42 north seeking
gyro tool.
All collar coordinates are provided in the Geocentric Datum of Australian
(GDA94 Zone 51 or GDA2020 z51). All relative depth information is reported
in Australian Height Datum (AHD).
Data spacing and distribution Diamond and RC drilling at Thomsons, Big Tree, Camp Dome, O'Callaghans,
Teague, Chilly & Atlantis spacings ranged from 120 to 500m. Individual
holes are targeting specific targets, and are not part of a grid pattern, all
holes are orientated at approximately 90 degrees to the interpretation
geological strike of the intended target.
Orientation of data in relation to geological structure RC and diamond holes at Thomsons, Big Tree and Camp Dome were orientated
perpendicular to the interpreted strike of the target, holes were angled
between -60⁰ and -70⁰ to intersect moderate to steeply dipping sandstone
and siltstone stratigraphy, reef and stock work mineralisation at a high
angle.
RC/DD drilling at Chilly, Teague, and Ernest Giles was generally done
orthogonal to interpreted stratigraphy on holes 80 -500m apart, influenced by
cultural disturbance minimisation around sand dunes and access. Atlantis
holes were targeting geophysical modelled 3D bodies at depth and were single
holes.
Sample security The security of samples is controlled by tracking samples from drill rig to
database.
RC samples and drill core was generally delivered from the drill rig to the
Telfer core yard every shift.
Samples from Ernest Giles are collected, checked and freighted by Greatland to
a freight company then taken to Intertek laboratory in Kalgoorlie for sample
preparation. The pulps are then taken to Perth by Intertek for chemical
analysis.
Samples were freighted in sealed bags, labelled by bar codes, by road to the
Laboratory by an authorised freight company.
All samples are collected in pre-numbered calico bags. Verification of sample
numbers and identification is conducted by the laboratory on receipt of
samples, and sample receipt advise issued to Greatland.
Details of all sample movement are recorded in a database table. Dates, Hole
ID sample ranges, and the analytical suite requested are recorded with the
dispatch of samples to analytical services. Any discrepancies logged at the
receipt of samples into the analytical services are validated.
Audits or reviews No audits for reviews have been completed.
JORC 2012 Table 1 Telfer and Regional Exploration: Section 2- Reporting of
Exploration Results
Criteria Commentary
Mineral tenement and land tenure status Prospect Tenement Location
The following tenements are 100% owned by Greatland and Greatland Exploration
Pty Ltd:
· Thomsons M 45/10
· Camp Dome E 45/3261
· Big Tree M 45/400
· O'Callaghans M 45/203
· Ernest Giles E38/2205
The following tenements are the subject of an unincorporated joint venture
(Paterson South Joint Venture) between Rio Tinto Exploration Pty Limited
(RTX) (49%) and Greatland Paterson South Pty Ltd (51%). Pursuant to the
farm-in arrangements, Greatland may earn up to a 75% interest in:
· Triangle Teague - E45/5532
· Budjidowns - Atlantis - E45/4815
The Paterson tenements are subject to Land Access Agreements with Greatland
and Jamukurnu-Yapalikurnu Aboriginal Corporation (JYAC) which has been in
place since December 2015.
The Ernest Giles tenements are subject to Land Access Agreements with
Greatland and the Wakamurru AC (RNTBC) which has been in place since August
2023.
Exploration done by other parties Thomson's prospect
· A substantial drilling programme was carried out by Newmont
Holdings Pty Ltd in 1974- 75 including several deep diamond drill holes and
short rotary holes.
· Minor amounts of shallow RC and diamond drilling were carried out
by Newmont Holdings Pty Ltd from 1975 - 1990. In 1990, Newmont stated an
oxide resource estimate of (WAMEX a32302) 478,093t @ 2.10g/t Au Indicated and
85,000t @ 0.9 -2.5g/t Au. This estimate has not been updated to be JORC 2012
compliant.
· Newcrest Mining Limited (1991 - 2023) conducted several minor RC
programs with two (2) diamond tails
Big Tree prospect
§ The Big Tree deposit was discovered in the late 1980's by Newmont
Holdings Pty Ltd (Newmont) and has been subject to numerous exploration and
resource definition by previous owners including Newmont and Newcrest Mining
Limited.
§ In 1994, Newcrest Mining Limited stated a Resource of 2.23Mt @ 1.56g/t
for 111,699Oz (A4391). This estimate has not been updated to be JORC 2012
compliant
Camp Dome prospect
§ The Camp Dome deposit was discovered in the 1980's and has been subject
to numerous drill programs by previous owners Western Mining Corporation,
Marathon Petroleum, Geopeko, Newmont, Duval Mining, Normandy Gold Exploration
and Newcrest Mining Limited.
§ In 2011, Newcrest Mining Limited stated an oxide Resource of 14Mt @ 0.37%
Cu for 52Kt Copper oxide. This estimate has not been updated to be JORC 2012
compliant.
O'Callaghans Prospect
§ O'Callaghans was initially targeted by Newmont Australia in 1985 with
first polymetallic skarn mineralisation was intersected in 1991 by Newcrest
Mining Limited. In 2023 Newmont reported Indicated and Inferred Mineral
Resource of ~54Mt @ 0.35% WO3, 0.5% Zn, 0.25% Pb, 0.29% Cu.
Ernest Giles:
· CRA initially carried out an aeromagnetic survey in the mid 90's.
· WMC after reviewing the geophysics interpreted the area as
containing Archean greenstones, and completed regional soils and gravity
surveys along with 200m spaced aeromagnetic and 8 RC holes (ENGC01-8) over
what is now the Meadows prospect, identifying anomalous gold between 1996 and
1999.
· MRG metal completed further aeromagnetics and 3 diamond holes
(EY4001-EY4003) in the region from 2011 to 2015.
Paterson South - previous exploration is in Table 1 from the 7(th) Nov 2024
AIM RNS release
Historic drill hole information is open file and available in WAMEX reports.
Geology Exploration is focused within the Paterson Province, a Proterozoic tectonic
domain in northwestern Western Australia characterised by complex structural
and stratigraphic architecture.
The region hosts Neoproterozoic sedimentary sequences, primarily quartzites,
sandstones, siltstones, and carbonaceous units of the Lamil Group, which have
undergone multiple deformation events.
Mineralisation in the province is typically associated with folded and faulted
domal structures, with gold and copper occurring in quartz-carbonate-sulphide
veins, breccias, and stockworks. These are often structurally controlled,
forming along hinge zones, axial planes, and fault intersections, and may be
linked to intrusion-related hydrothermal systems.
Exploration at Ernest Giles is for Yilgarn style Archean lode gold deposits.
Drill hole Information Refer to Table 2 - Significant Intercepts.
Data aggregation methods Significant assay intercepts are reported as length-weighted averages in Table
2.
All Telfer exploration primary intervals except of Camp Dome are calculated at
0.2g/t Au cut-off and minimum 0.1m downhole width with 5m maximum internal
dilution.
Including intervals calculated at 1g/t Au or 0.5g/t Au cut-off with 5m max
internal dilution.
All primary intervals at Camp Dome are calculated at a 0.3% Cu cut-off and
minimum 0.1m downhole width, with maximum consecutive internal dilution of 5m.
Average grades are based on length-weighting of samples grade, and only those
intercepts with widths a percent (%) metre (Cu % x length) above 3% metres
have been reported.
Regional Exploration primary intervals are calculated at 0.1g/t Au cut-off
with 4m max internal dilution.
No top cuts are applied to intercept calculations.
Relationship between mineralisation widths and intercept lengths Drill holes were angled to intersect steeply to moderately dipping geological
targets at high angles.
All significant assay intervals are down hole widths as the true orientation
of mineralisation is currently unknown.
Diagrams As provided
Balanced reporting The report is considered balanced
Other substantive exploration data See body of announcement and figures.
Further work Further work is required at Big Tree, Teague, Meadows and Camp Dome including
extension of RC pre-collars with diamond tails.
EM surveys are intended at Chilly to improve targeting of future drilling
Assays for the remainder of the programme will be reported once received and
validated. Further work will be planned dependent on assay results and
ongoing geological interpretations at all prospect areas.
This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact
rns@lseg.com (mailto:rns@lseg.com)
or visit
www.rns.com (http://www.rns.com/)
.
RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our
Privacy Policy (https://www.lseg.com/privacy-and-cookie-policy)
. END DRLAKBBNOBKKADB
Copyright 2019 Regulatory News Service, all rights reservedRecent news on Greatland Resources
See all newsREG - Greatland Resources - December Quarter 2025 Activities Report
AnnouncementREG - Greatland Resources - Holding(s) in Company
AnnouncementREG - Greatland Resources - Exploration and Resource Development Update
AnnouncementREG - Greatland Resources - Holding(s) in Company
AnnouncementREG - Greatland Resources - Holding(s) in Company
Announcement