REG - Greatland Gold PLC - West Dome Underground Project
20/02/2025 07:15
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RNS Number : 8447X Greatland Gold PLC 20 February 2025
Greatland Gold plc (AIM: GGP)
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NEWS RELEASE | 20 February 2025
West Dome Underground Project
Maiden underground drilling results below the Telfer West Dome Open Pit
confirm high grade near-mine underground opportunity
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.
Greatland Gold plc (AIM:GGP) (Greatland or the Company) is pleased to provide
results from the maiden underground drilling campaign at the West Dome
Underground target at Telfer.
Highlights
§ Maiden West Dome Underground diamond drilling program completed in December
2024 quarter with all results now returned and interpreted.
§ 16 of the 19 holes drilled in this program intercepted >50 gram-metres
Au (gm), with the average down hole intercept from these 16 holes of 23.2m @
2.95g/t Au and 1.07% Cu (4.23g/t AuEq(1))
§ Exceptional results included:
‒ 14.3m @ 9.06 g/t Au and 8.57% Cu (19.34 g/t AuEq) from
290.4m
‒ 59.0m @ 2.83 g/t Au & 0.71% Cu (3.68 g/t AuEq) from
259.0m
§ Mineralisation identified over 700m of strike and remains open along strike
and down dip
§ Drilling confirms high grade mineralisation in the West Dome Underground is
associated with the same geological units seen at the active Main Dome
Underground, which has produced more than 3.1Moz gold and 210kt copper to date
§ Existing infrastructure supports the economics of a potential West Dome
Underground Project and would accelerate its development
§ Second phase drilling program planning underway
Greatland Managing Director, Shaun Day, commented:
"The exceptional drilling results from the maiden underground drilling
campaign validate the exciting opportunity we identified at the West Dome
Underground during our acquisition due diligence.
"The Main Dome Underground began production in mid 2006 and continues
operating today, almost 20 years later, having produced more than 3 million
ounces of gold to date. This underground drilling campaign is the first since
driving across to gain access beneath the West Dome.
"The West Dome Underground drilling delivered high grades and equally
importantly, excellent widths. They confirm that key geological units hosting
the Main Dome Underground mineralisation are present in the West Dome
Underground. Mineralisation remains open along strike and down dip, and we
intend to increase our confidence of the initial body as well as continue to
test extensions in our further work.
"A primary focus for us at Telfer is mine life extension, and these results
confirm the West Dome Underground Project as a very high priority target for
us. We are planning a second phase drilling program, including geotechnical
and hydrogeological testing to support planned mine studies. If we continue
to have exploration success, the ability to leverage the existing underground
infrastructure at Telfer, including the haulage shaft, provides the
opportunity to rapidly advance development of the West Dome Underground."
West Dome Underground Project
Overview
The first target tested from underground in the West Dome Underground Project
is situated approximately 800m below the current West Dome Open Pit.
Figure 1: West Dome Underground Project location
The Main Dome Underground is situated below the Main Dome Open Pit, and to
date has produced more than 75Mt for 3.1Moz gold and 210kt copper. In 2007,
construction of an underground crusher and haulage shaft was completed, and
has been in continuous use since then. Initially the Main Dome Underground
mainly operated as a sub level cave, extracting on average 5Mtpa between 2008
to 2019. In 2018 long hole open stope production commenced, producing over
6.4Mt to date.
The West Dome Underground Project (WDU) emerged from the recognition that key
geological structures hosting mineralisation in the Main Dome Open Pit repeat
in the West Dome Open Pit, specifically the E Reefs and the Middle Vale Reef
(MVR, refer Figure 1). Accordingly, it was proposed that the geological
features that are key to mineralisation in the Main Dome Underground (refer
Figure 1), may also repeat below the West Dome Open Pit.
This concept was drill tested from surface between 2009 - 2019, with a total
of 16 diamond holes drilled along the 3km strike length of the concept
target. This drilling confirmed the presence of the key geological features
and identified the hinge zone of the Lower Limey Unit (LLU) (Figure 1), which
has previously been referred to as the 'West Dome Deeps', as a highly
prospective zone.
Following the successful outcome of internal mining studies of the WDU target,
in 2019 an exploration drill drive from the Main Dome Underground across to
the West Dome Underground was proposed and sporadically progressed (due to
very limited budget approved by previous owner Newcrest Mining). Following
Newmont Mining's acquisition of Newcrest Mining, budget was approved and
completion of the drill drive achieved in late 2024, enabling a maiden
underground drilling program comprising 19 holes for 7,473m to be completed in
the December 2024 quarter.
Drill Results
Results from the maiden underground drill program have consistently
intercepted high gold and copper grades and thicknesses (Figure 3). High grade
mineralisation is predominantly hosted within the LLU which has produced more
than 1.0Moz Au and 75kt Cu in the Main Dome Underground.
Drilling has now defined a strike of more than 700 metres of high grade LLU
mineralisation, with an average down hole intercept of 23.2 meters at 2.95 g/t
Au and 1.07% Cu (4.23 g/t AuEq) from the 16 drill holes (of 19) that
intercepted >50gm Au.
High grade gold and copper mineralisation has been consistently intercepted
within the LLU geological unit on the West Limb of the main anticlinal fold
structure (Figure 2), while results returned from the East Limb are
encouraging but less consistent.
Significant down hole intercepts within the LLU domain include:
§ WUC4550022 with 14.3m @ 9.06 g/t Au & 8.57% Cu (19.34 g/t AuEq) from
290.4m
§ WUC4550007 with 59.0m @ 2.83 g/t Au & 0.71% Cu (3.68 g/t AuEq) from
259.0m
§ WUC4550016 with 20.9m @ 4.27 g/t Au & 2.77% Cu (7.59 g/t AuEq) from
300.2m
§ WUC4550040 with 31.6m @ 3.09 g/t Au & 0.60% Cu (3.81 g/t AuEq) from
284.7m
§ WUC4550013 with 15.2m @ 3.31 g/t Au & 3.00% Cu (6.91 g/t AuEq) from
286.6m
§ WUC4550032 with 20.9m @ 4.07 g/t Au & 0.49% Cu (4.66 g/t AuEq) from
305.5m
§ WUC4550009A with 22.7m @ 2.71 g/t Au & 1.43% Cu (4.43 g/t AuEq) from
268.6m
§ WUC4550035 with 22.3m @ 2.41 g/t Au & 1.66% Cu (4.40 g/t AuEq) from
326.7m
§ WUC4550023 with 12.5m @ 5.08 g/t Au & 0.52% Cu (5.70 g/t AuEq) from
317.3m
§ WUC4550012 with 9.3m @ 5.44 g/t Au & 1.41% Cu (7.13 g/t AuEq) from
278.0m
§ WUC4550041 with 14.0m @ 2.55 g/t Au & 1.13% Cu (3.90 g/t AuEq) from
291.0m
Additionally, drilling has intercepted several broad zones of stockwork
mineralisation within the core of the anticlinal hinge. These zones are
interpreted to be similar in style to the large stockwork systems that formed
part of the mineralisation targeted by the sub-level cave at the Main Dome
Underground. Since these zones were not the primary focus of the initial
drilling phase, they will be targeted in future drilling programs.
Significant down hole intercepts within these zones include:
§ WUC4550019 with 42.0m @ 1.97 g/t Au & 0.49% Cu (2.56 g/t AuEq) from
294.0m
§ WUC4550020 with 18.4m @ 3.93 g/t Au & 0.92% Cu (5.03 g/t AuEq) from
330.6m
§ WUC4550023 with 36.1m @ 2.14 g/t Au & 0.21% Cu (2.39 g/t AuEq) from
365.9m
§ WUC4550022 with 31.7m @ 1.34 g/t Au & 0.35% Cu (1.76 g/t AuEq) from
366.0m
§ WUC4550030 with 23.3m @ 1.64 g/t Au & 0.54% Cu (2.39 g/t AuEq) from
341.0m
Figure 2: West Dome Underground Drilling Location
Figure 3: West Dome Underground "Western Limb" Long Section
Figure 4: West Dome Underground Geological Type Section
Next steps
Greatland plans to continue progressing the West Dome Underground Project,
with the following planned activities:
§ Phase two drilling program design targeting both infill of the existing
mineralisation and continued extensions along strike and down dip, to support
definition of a maiden Mineral Resource estimate.
§ Geotechnical and hydrogeological test work to be incorporated in the phase
two drilling program to inform planned mining studies.
Subject to positive outcomes from the above work, the existing infrastructure
provides the opportunity to accelerate and support economics of the West Dome
Underground Project:
§ 1.9km drill drive from the Main Dome Underground already in place,
completed in 2024 prior to Greatland ownership.
§ Main Dome underground crusher and haulage shaft have significant surplus
capacity that could be accessed by development of a ~ 1.5km haulage drive.
Table 1:West Dome Underground drill collars and significant down hole
intercepts.
Note: Significant Intercepts are calculated using a minimum threshold of 0.5
g/t Au and allowing for up to 5m of internal dilution. Only intercepts
exceeding 5gm AuEq are included in this report. (gm = gram metre, interval
width multiplied by AuEq grade).
Drill Program Hole ID Hole Type Collar Details From To Width Au (g/t) Cu (%) AuEq(1) AuEq (GM)(2)
East North RL Azimuth Dip Depth
UG Ph1 WUC4550007 DD 58771 13138 4421 303 6 380 107.0 109.2 2.2 2.00 0.43 2.52 5
UG Ph1 114.7 121.0 6.3 3.14 0.11 3.27 21
UG Ph1 126.0 128.5 2.5 4.24 0.04 4.28 11
UG Ph1 259.0 318.0 59.0 2.83 0.71 3.68 217
UG Ph1 360.3 362.3 2.1 2.09 0.83 3.08 6
UG Ph1 WUC4550008 DD 58771 13138 4421 295.3 13 410 131.0 136.7 5.7 1.01 0.06 1.08 6
UG Ph1 266.0 276.0 10.0 0.64 0.05 0.70 7
UG Ph1 311.0 319.0 8.0 0.60 0.07 0.69 5
UG Ph1 328.0 334.4 6.4 3.87 0.05 3.93 25
UG Ph1 WUC4550009A DD 58771 13137 4421 289.2 -2 318 132.1 144.7 12.6 1.60 0.07 1.69 21
UG Ph1 151.0 188.0 37.0 1.27 0.05 1.33 49
UG Ph1 268.6 291.3 22.7 2.71 1.43 4.43 101
UG Ph1 WUC4550010 DD 58772 13138 4421 312 12 400 102.6 109.5 6.8 6.88 0.39 7.35 50
UG Ph1 WUC4550012 DD 58772 13138 4421 321.5 1.5 430 126.7 130.0 3.3 1.90 0.60 2.62 9
UG Ph1 278.0 287.3 9.3 5.44 1.41 7.13 66
UG Ph1 341.0 353.3 12.3 3.17 0.83 4.16 51
UG Ph1 Incl 323.5 336.0 12.5 3.71 1.03 4.95 62
UG Ph1 430 370.0 375.0 5.0 6.68 0.03 6.71 34
UG Ph1 384.9 389.0 4.1 0.56 0.91 1.65 7
UG Ph1 WUC4550013 DD 58771 13136 4420 295.2 6 380 112.0 116.6 4.6 1.49 0.02 1.52 7
UG Ph1 286.6 301.8 15.2 3.31 3.00 6.91 105
UG Ph1 323.0 324.0 1.0 7.87 0.65 8.65 9
UG Ph1 354.5 377.4 22.9 0.65 0.11 0.79 18
UG Ph1 WUC4550016 DD 58770 13105 4420 341.2 4 354 152.3 161.0 8.7 0.75 0.05 0.81 7
UG Ph1 179.0 180.0 1.0 5.37 0.00 5.37 5
UG Ph1 223.2 237.0 13.9 2.83 0.28 3.17 44
UG Ph1 300.2 321.0 20.9 4.27 2.77 7.59 158
UG Ph1 344.4 344.8 0.4 17.60 5.91 24.69 9
UG Ph1 WUC4550017 DD 58770 13105 4421 274.7 -1 155 drillhole failed to reach target
UG Ph1 WUC4550018 DD 58770 13105 4420 278.5 21 423 175.0 183.0 8.0 1.27 0.10 1.39 11
UG Ph1 198.0 206.5 8.5 0.63 0.60 1.35 11
UG Ph1 294.0 325.0 31.0 1.18 0.38 1.63 51
UG Ph1 376.0 382.5 6.5 1.05 0.25 1.35 9
UG Ph1 WUC4550019 DD 58770 13104 4420 281 11 390 269.0 287.1 18.1 1.53 0.08 1.63 30
UG Ph1 294.0 336.0 42.0 1.97 0.49 2.56 107
UG Ph1 WUC4550020 DD 58770 13105 4420 274.6 14 428 272.9 282.9 10.0 0.64 0.09 0.75 7
UG Ph1 305.8 315.0 9.2 2.01 0.15 2.19 20
UG Ph1 330.6 349.0 18.4 3.93 0.92 5.03 93
UG Ph1 WUC4550021 58771 13114 4420 274.6 14 429 113.7 121.0 7.3 0.55 0.47 1.11 8
UG Ph1 308.0 318.5 10.5 0.51 0.51 1.12 12
UG Ph1 WUC4550022 DD 58771 13113 4420 289.5 6.5 400 121.7 128.2 6.6 1.64 1.14 3.01 20
UG Ph1 159.9 161.3 1.4 7.16 0.07 7.24 10
UG Ph1 228.7 234.0 5.3 0.87 0.09 0.98 5
UG Ph1 290.4 304.7 14.3 9.06 8.57 19.34 277
UG Ph1 347.5 352.6 5.1 1.39 1.18 2.81 14
UG Ph1 366.0 397.7 31.7 1.34 0.35 1.76 56
UG Ph1 WUC4550023 DD 58784 13038 4422 248.5 11.5 516 53.0 54.0 1.0 11.40 0.13 11.56 12
UG Ph1 205.0 212.5 7.4 1.23 0.31 1.60 12
UG Ph1 317.3 329.7 12.5 5.08 0.52 5.70 71
UG Ph1 365.9 402.0 36.1 2.14 0.21 2.39 86
UG Ph1 408.0 416.0 8.0 3.60 0.50 4.20 34
UG Ph1 WUC4550030 DD 58783 13063 4421 270.6 14 429 147.0 164.0 17.0 0.54 0.13 0.69 12
UG Ph1 182.8 188.7 5.9 1.04 0.61 1.77 11
UG Ph1 319.0 325.0 6.0 1.02 0.01 1.03 6
UG Ph1 341.0 364.3 23.3 1.64 0.54 2.29 53
UG Ph1 370.0 381.8 11.8 2.09 0.15 2.27 27
UG Ph1 WUC4550032 DD 58783 13062 4422 267.4 9.8 425 117.0 118.0 1.0 27.30 0.02 27.32 27
UG Ph1 157.5 163.0 5.5 1.92 0.06 1.99 11
UG Ph1 171.1 181.0 9.9 0.55 0.07 0.63 6
UG Ph1 282.3 294.0 11.7 0.86 0.01 0.87 10
UG Ph1 305.5 326.4 20.9 4.07 0.49 4.66 98
UG Ph1 336.9 360.0 23.1 1.13 0.49 1.72 40
UG Ph1 399.0 408.0 9.0 2.91 0.24 3.19 29
UG Ph1 421.1 423.0 1.9 5.24 1.12 6.58 13
UG Ph1 WUC4550035 DD 58783 13062 4422 261 11.3 460 163.8 169.4 5.7 1.17 0.21 1.42 8
UG Ph1 213.5 221.0 7.5 0.73 0.04 0.78 6
UG Ph1 246.0 246.5 0.5 28.80 0.02 28.82 16
UG Ph1 266.0 286.0 20.0 2.47 0.03 2.50 50
UG Ph1 326.7 349.0 22.3 2.41 1.66 4.40 98
UG Ph1 354.6 355.2 0.6 5.87 2.48 8.85 5
UG Ph1 361.0 367.0 6.0 3.37 0.26 3.68 22
UG Ph1 374.0 386.1 12.1 0.92 0.64 1.69 20
UG Ph1 407.0 407.3 0.3 32.20 0.85 33.22 10
UG Ph1 426.6 436.0 9.4 0.51 0.07 0.59 6
UG Ph1 WUC4550040 DD 58771 13104 4420 276 3.5 376 140.9 142.9 2.0 10.01 0.07 10.09 20
UG Ph1 203.0 230.0 27.0 0.70 0.22 0.96 26
UG Ph1 268.0 279.0 11.0 1.72 0.86 2.75 30
UG Ph1 284.7 316.3 31.6 3.09 0.60 3.81 120
UG Ph1 WUC4550041 DD 58771 13138 4421 299.4 2.5 370 114.0 122.4 8.4 1.23 0.07 1.32 11
UG Ph1 190.0 191.0 1.0 6.82 0.01 6.83 7
UG Ph1 291.0 305.0 14.0 2.55 1.13 3.90 55
UG Ph1 348.7 364.0 15.3 0.71 0.37 1.16 18
Historic WRC34101 DD 59013 13417 5519 229 77 1543 1497.0 1504.0 7.0 1.27 0.04 1.32 9
Historic WRC33404W1 DD 58528 13351 5372 183.5 70.5 1243 903.8 915.7 11.9 1.50 0.01 1.51 18
Historic 922 923.2 1.1 5.70 0.08 5.80 7
Historic 931.8 946 14.2 0.93 0.13 1.09 15
Historic 957.1 958.1 1.0 7.41 3.45 11.55 11
Historic 972.9 983 10.1 3.91 0.02 3.93 40
Historic 1076.7 1091 14.3 0.45 0.06 0.52 7
Historic 1152 1157.7 5.8 0.75 0.11 0.88 5
Historic WRC32801A DD 57649 13289 5512 94 80.5 1870 1156.7 1164.5 7.8 0.56 0.16 0.75 6
Historic 1681.7 1689.1 7.4 1.38 1.60 3.30 25
Historic 1695.9 1702 6.2 0.58 0.50 1.18 7
Historic 1713.7 1721 7.3 0.71 0.78 1.64 12
Historic 1721.1 1722.4 1.3 8.96 4.39 14.23 18
Historic 1730.7 1734 3.3 1.96 0.10 2.08 7
Historic 1768 1787 19.0 0.70 0.61 1.43 27
Historic 1796.5 1810.5 14.0 1.17 0.28 1.51 21
Historic 1844.9 1867 22.1 1.06 0.08 1.15 25
Historic WRC30582W1 DD 58761 13037 5439 262 87 1679 883 884 1.0 13.60 1.46 15.35 15
Historic 1611 1612 1.0 6.36 0.51 6.97 7
Historic 1390 1396.6 6.6 0.90 0.09 1.00 7
Historic 1252 1256 4.0 1.32 0.07 1.40 6
Historic 1362.5 1377 14.5 0.76 0.09 0.87 13
Historic 1546 1559 13.0 0.77 0.08 0.87 11
Historic 1420 1424 4.0 1.35 0.11 1.48 6
Historic WRC28605B DD 59234 12825 5521 262 72.1 1702 1357.5 1370 12.5 1.87 0.31 2.24 28
Historic 1389 1417 28.0 0.29 0.09 0.40 11
Historic 1541 1551.3 10.3 0.37 0.18 0.59 6
Historic 1565 1577 12.0 1.18 0.59 1.89 23
Historic 1601.5 1609 7.5 1.25 0.10 1.37 10
Historic WRC28048W4 DD 59265 12799 5521 216.25 71.88 1776 1414 1415 1.0 15.67 0.03 15.71 16
Historic 1499.8 1511.8 12.0 0.39 0.05 0.45 5
Historic 1636 1641.6 5.6 2.86 0.03 2.89 16
Historic 1657 1669.5 12.5 1.60 0.22 1.86 23
Historic 1753.7 1756 2.3 3.17 0.08 3.27 8
Historic WRC28048W2 DD 59265 12799 5521 216 70 1801 1286 1286.5 0.5 11.64 0.06 11.71 6
Historic 1592 1602.0 10.0 1.37 0.32 1.75 18
Historic 1614.6 1621.3 6.7 1.45 0.26 1.77 12
Historic 1645.9 1653 7.1 2.97 0.25 3.27 23
Historic WRC28048W1 DD 59265 12799 5521 216 70 1670 1626 1648 22.0 0.38 0.05 0.44 10
Historic 859 860 1.0 5.62 0.02 5.64 6
Historic 1130.6 1136.8 6.2 1.48 0.03 1.51 9
Historic 1321 1329 8.0 16.03 0.23 16.31 130
Historic 1335 1336 1.0 5.70 0.05 5.76 6
Historic 1353.6 1356 2.4 1.98 0.09 2.09 5
Historic 1390.7 1400 9.3 0.54 0.28 0.88 8
Historic 1528 1531 3.0 1.73 0.08 1.83 5
Historic WRC31558 DD 58150 13150 5517 90 85 1850 1195.2 1228 32.8 2.05 0.48 2.63 86
Historic 1274.0 1287.9 13.9 0.90 0.57 1.58 22
Historic 1299.7 1307 7.3 0.54 0.91 1.63 12
Historic 1404.8 1407.8 3.0 1.64 0.42 2.14 6
Historic 1519.2 1523.3 4.0 4.89 0.74 5.78 23
Historic 1542.4 1549.5 7.1 0.58 0.16 0.77 5
Historic 1595.8 1596.5 0.8 7.20 0.73 8.08 6
Historic 1669.6 1679 9.4 1.33 0.25 1.63 15
Historic WRC33901 DD 58118 13394 5517 89 75.5 1330 1050.3 1060.1 9.8 1.57 0.18 1.79 17
Historic 1050.3 1060.1 9.8 1.57 0.18 1.79 17
Historic 1090.3 1111 20.8 0.65 0.13 0.81 17
Historic 1090.3 1111 20.8 0.65 0.13 0.81 17
Historic 1119 1129.1 10.1 0.73 0.27 1.05 11
Historic 1119 1129.1 10.1 0.73 0.27 1.05 11
Historic 1216 1235.3 19.3 2.03 0.06 2.10 41
Historic 1216 1235.3 19.3 2.03 0.06 2.10 41
Historic WRC31561 DD 58831 13150 5485 270 -70 1713 1170.4 1175.3 4.9 1.56 1.36 3.19 16
Historic 1190 1200 10.0 0.90 0.28 1.24 12
Historic 1266.1 1269 2.9 1.46 0.28 1.80 5
Historic 1290.2 1290.7 0.6 58.50 0.08 58.60 32
Historic WRC34081 DD 58068 13422 5515 90 85 1519 891 908 17.0 1.08 0.05 1.14 19
Historic 1182 1189 7.0 0.97 0.04 1.02 7
Historic 1216 1219.1 3.1 0.96 1.67 2.96 9
Historic 1225.7 1246.1 20.4 5.17 0.39 5.64 115
Historic 1482 1489 7.0 1.57 0.04 1.62 11
Historic W32736W1 DD 57952 13254 5524 90 85 1411 762 764 2.0 4.29 0.13 4.45 9
Historic 771 781 10.0 0.94 0.14 1.11 11
Historic 941.9 949 7.1 0.88 0.04 0.93 7
Historic 1231 1238 7.0 1.82 0.22 2.08 15
Historic 1256 1283.1 27.1 1.31 0.76 2.22 60
Historic 1291.4 1293 1.6 1.56 1.81 3.73 6
Historic W27563W1 DD 57964 12751 5528 80 -85.33 1479 1091 1109.1 18.1 0.78 0.01 0.79 14
Historic 1285 1301.2 16.2 1.52 0.16 1.71 28
Historic 1318 1346 28.0 0.96 0.16 1.15 32
Historic WRC30070 DD 57965 13044 5512 94 -85 1509 694.3 699.6 5.3 13.48 0.14 13.65 72
Historic 718.9 736 17.0 2.05 0.31 2.42 41
Historic 744.7 749.2 4.6 0.96 0.66 1.75 8
Historic 847.5 851 3.5 3.01 0.26 3.32 11
Historic 980.9 992 11.1 1.02 0.04 1.07 12
Historic 1024.3 1033.4 9.0 3.65 0.03 3.69 33
Historic 1041.9 1073 31.1 0.85 0.03 0.89 28
Historic 1093 1104 11.0 0.50 0.03 0.54 6
Historic 1291 1326 35.0 3.30 0.24 3.59 126
Historic 1334 1342 8.0 0.54 0.10 0.66 5
Historic 1375 1377.9 2.9 0.76 1.06 2.03 6
Historic 1403 1413.6 10.6 1.93 0.95 3.07 32
Historic 1441.8 1454 12.2 1.47 0.13 1.63 20
Historic 1481.3 1487 5.8 2.14 0.15 2.32 13
Historic W30070W1 DD 57965 13044 5512 94 -85 1520 844 854.4 10.4 0.86 0.06 0.93 10
Historic 877 879 2.0 3.49 0.01 3.50 7
Historic 889 892 3.0 1.74 0.01 1.75 5
Historic 983.1 993 9.9 0.78 0.06 0.85 8
Historic 1024 1055.4 31.4 0.85 0.02 0.87 27
Historic 1109 1114.9 5.9 1.16 0.05 1.22 7
Historic 1190.4 1191.4 0.9 12.52 0.01 12.53 12
Historic 1261 1274 13.0 2.06 0.67 2.86 37
Historic 1284.3 1305 20.7 1.65 0.49 2.24 46
Historic W31567W1 DD 57944 13158 5524 90 -85 1639 975 983 8.0 0.97 0.01 0.98 8
Historic 988.6 998 9.4 0.60 0.00 0.60 6
Historic 1050.7 1082 31.3 4.43 0.03 4.47 140
Historic 1214.0 1221 7.0 0.94 0.17 1.14 8
Historic 1306.1 1331 24.9 2.24 0.49 2.83 70
Historic 1353 1362.8 9.8 0.53 0.21 0.78 8
Historic 1390.8 1426 35.2 2.21 0.71 3.06 108
Historic 1433 1453 20.0 0.52 0.16 0.71 14
Historic 1472.2 1475 2.8 0.69 1.96 3.04 9
Historic 1533.9 1537 3.1 9.58 1.02 10.80 33
Historic 1553.8 1558 4.2 0.88 0.81 1.85 8
Historic 1575.6 1590 14.4 1.73 0.18 1.95 28
Historic WRC29044 DD 57964 12904 5530 90 -85 1550 1100 1101 1.0 5.59 0.00 5.59 6
Historic 1100 1110 10.0 1.06 0.01 1.07 11
Historic 1119 1142 22.6 0.93 0.00 0.93 21
Historic 1177 1230 53.0 1.32 0.06 1.39 74
Historic 1200 1201 1.0 5.98 0.04 6.03 6
Historic 1212 1214 2.0 15.08 0.16 15.27 31
Historic 1226.9 1228 1.2 5.42 0.14 5.59 6
Historic 1292 1297 5.0 1.59 0.04 1.64 8
Historic 1319.7 1321 1.4 21.56 0.10 21.68 29
Historic 1319.7 1332 12.4 11.08 0.32 11.46 142
Historic 1322 1324 2.0 16.18 0.17 16.38 33
Historic 1325 1326.7 1.7 26.89 0.71 27.74 46
Historic 1327 1328 1.0 7.73 0.35 8.15 8
Historic 1331 1332 1.0 14.51 0.14 14.68 15
Footnotes:
1 The gold equivalent (AuEq) is based on assumed prices of AUD$3,150/oz Au and
AUD$5.30/lb Cu and metallurgical recoveries based on block metal grade,
reporting approximately at 85% for Au and 90% for Cu which equates to a
formula of approximately AuEq = Au (g/t) + 1.2* Cu (%). It is the company's
opinion that all the elements included in the metal equivalents calculation
have a reasonable potential to be recovered and sold.
2 Gold equivalent Gram metres (AuEq GM) are calculated by multiplying the
intercept width by the gold equivalent grade.
Contact
For further information, please contact:
Greatland Gold plc
Shaun Day, Managing Director | Rowan Krasnoff, Head of Business Development
info@greatlandgold.com
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
SI Capital Limited | Nick Emerson / Sam Lomanto | +44 148 341 3500
Media Relations
Australia - Fivemark Partners | Michael Vaughan | +61 422 602 720
UK - Gracechurch Group | Harry Chathli / Alexis Gore / Henry Gamble |
+44 204 582 3500
About Greatland
Greatland is a gold and copper mining company listed on the London Stock
Exchange's AIM Market (LSE:GGP) and operates its business from Western
Australia.
The Greatland portfolio includes the 100% owned Telfer gold-copper mine, the
adjacent 100% owned world class Havieron gold-copper project (under
development), 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 of Western Australia.
Greatland is targeting a cross listing on the ASX in the June quarter 2025.
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 this announcement 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.
JORC 2012 - Table 1
Section 1 - Sampling Techniques and Data
Criteria Commentary
Sampling techniques Drilling for resource definition and grade control typically includes a
combination of surface reverse circulation (RC) and surface and underground
diamond (DD) drilling. These activities are conducted periodically throughout
the mine's history. Core sizes for resource definition drilling usually range
from NQ to PQ, while grade control drilling is generally carried out with
smaller core sizes, such as NQ or LTK60.
Diamond drilling samples are collected based on lithological units, with
sample lengths ranging from a maximum of 1.2 meters to a minimum of 0.2
meters, although 1-meter intervals are most common. NQ and larger cores are
typically cut and half-sampled (with half retained), while smaller cores are
often sampled whole.
RC drilling samples are usually collected at 1-meter intervals and split using
a riffle or cone splitter attached to the drill rig cyclone, producing a 2 to
5 kg primary sample. The bulk reject from splitting is retained in numbered
bags for temporary storage and logging. In some cases, RC samples are
collected as 2-meter composites, while earlier procedures or specific reef
zones reduced the sample interval to 0.5 meters.
Rock chip samples are gathered manually using hand tools, such as geo-picks,
from exposed development faces. These samples are typically collected
perpendicular to bedding and include all relevant domains, such as reef,
hanging wall, and footwall. Samples are around 2-3 kg and stored in
pre-numbered bags.
Drilling techniques The drilling methods used included various core diameters, with a focus on
HQ/HQ3, NQ/NQ2, and LTK60, along with limited use of PQ and BQ core. There is
also limited amount of RC drilling, mainly in the upper parts of the mine.
All drilling within the West Dome underground has been completed with diamond
drilling
Drill sample recovery Core recovery data from diamond drilling is systematically recorded by
comparing drillers' depth blocks in core trays with database records. Between
January 1, 2018, and June 30, 2019, a total of 605 diamond drill holes
(including four with RC tails) were completed. Detailed core recovery data is
available for 346 drill holes (57%). Additionally, recovery data is not
recorded for RC drilling. Recovery data was collected for all recent drill
holes into the West Dome Underground.
Logging Geological logging is conducted on all diamond and reverse circulation drill
holes, covering lithology, alteration, mineralisation, veining, and structure
(for diamond core). All drill core is photographed before sampling. The
database contains over 1,000 km of logged geology, representing around 80% of
total drilling. Rock Quality Designation (RQD) is routinely logged, with
approximately 900 diamond holes geotechnically assessed. The level of detail
is appropriate for resource estimation and related studies.
Sub-sampling techniques and sample preparation Sampling and quality control protocols are appropriate for the material being
sampled. Diamond core is cut and sampled as specified, while RC sampling is
typically conducted on dry samples, with condition recorded. Since 2015, RC
samples have been split using cone splitters instead of riffle splitters.
Field duplicates are collected at a rate of 1 in 20 samples.
Sample preparation and assay processes have varied over time. From 2000 to
2003, samples were sent to Perth for processing. Since 2003, most samples have
been processed at the Telfer laboratory using drying, crushing, and
pulverizing techniques, with standards improving over the years. Due to new
requirements and capacity constraints, commercial labs are predominately used
for samples that will inform a mineral resource estimate while the Telfer lab
remained focused on grade control drilling and face samples.
Quality of assay data and laboratory tests Assay processes at Telfer have been conducted to industry standards (at the
time), with samples analysed at both the Telfer laboratory and commercial
laboratories. Prior to 1998, assay quality control followed industry standards
of that time, with no significant quality concerns identified. Since then,
protocols have been updated to align with industry advancements.
Samples are typically prepared at the Telfer lab and sent to external
laboratories for analysis.. Gold is primarily analysed via fire assay, while
multi-element analysis (Ag, As, Bi, Cu, Fe, Ni, Pb, S, Zn) is performed using
ICPMS/AES following aqua-regia or four-acid digestion.
Since 1998, quality control procedures have included the use of Certified
Reference Materials (CRMs), blanks, and duplicates, as well as sample
resubmission and laboratory inspections. Matrix-matched CRMs have been in use
since 1999, with a shift toward multi-client CRMs since 2018. QAQC results are
assessed continuously, with investigations and re-assaying conducted when
necessary.
Overall, assay techniques and QAQC protocols are considered appropriate for
use in a Mineral Resource estimate, with data accuracy and precision
maintained throughout the process
Verification of sampling and assaying Significant intersections have been verified by company personnel and the
competent person. Drill hole data is securely stored in an acQuire database,
with strict controls in place to prevent errors or duplication. Automated
validation checks are performed, and data integrity is overseen by senior
geologists.
Data entry methods have evolved with technology, from paper templates and
Excel spreadsheets to direct digital entry into acQuire. Internal reviews by
site teams and resource personnel ensure data quality before resource
estimation, complemented by external reviews.
The Telfer Lab undergoes monthly audits, while commercial laboratories are
audited quarterly.
Location of data points Greatland Golds Telfer Gold Mine reports periodically to the WA Department of
Industry and Resources (DOIR), using the MGA94/AHD coordinate system for all
maps and digital data. However, mining operations use the Telfer Mine Grid
(TMG) and Telfer Height Datum (THD).
Topographic control is maintained through surface and aerial surveys, with
routine pit and underground surveys.
Drill hole collars are surveyed upon hole completion.
Downhole survey methods have evolved over time, from single-shot Eastman
cameras before 2004 to electronic single-shot tools from 2006 and multi-shot
tools from 2009. Currently, drill holes are surveyed at 30m intervals during
drilling, with detailed multi-shot surveys taken every 6m post-completion
using a Reflex EZ-Trac tool.
Data spacing and distribution The drill spacing applied to specific mineralised domains within the overall
resource is variable and is considered suitable for the style of
mineralisation and mineral resource estimation requirements.
Within the West Dome Underground drilling spacing varies from 50m to >200m.
Orientation of data in relation to geological structure The Telfer mine site features two large asymmetric dome structures: Main Dome
in the southeast and West Dome in the northwest. Both structures have steeply
dipping axial planes, with shallow to moderate western limbs and moderate to
steep eastern limbs. Main Dome extends approximately 3 km north-south and 2 km
east-west before plunging under cover, while West Dome has similar dimensions.
Surface drilling is designed to achieve optimal intersection angles with the
reefs, while underground drilling is planned within the constraints of
available collar locations. No orientation bias has been identified in the
drilling data.
Sample security Sample security is maintained through a tracking system from the drill rig to
the database. Historically, RC and diamond core drill hole samples were
barcoded by drill hole, but this practice has been discontinued. Currently,
resource development and underground drilling samples are collected in
pre-numbered calico bags.
All sample movements are recorded in a database, including dispatch dates,
Hole ID, sample ranges, and requested analytical tests. Any discrepancies
identified upon receipt at 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. Procedure audits and reviews are carried out by corporate employees
during site visits.
Section 2 - Reporting of Exploration Results
Criteria Commentary
Mineral tenement and land tenure status Mining and ore processing at Telfer are conducted under granted leases and
licenses covering all key infrastructure.
The Telfer Main Dome Underground Mineral Resource is within mining leases
M45/6 and M45/8, while the West Dome Underground target, located about 3 km
northwest of the Main Dome open pit, lies within mining leases M45/7 and
M45/33. All these leases are currently under renewal.
An Indigenous Land Use Agreement (ILUA) has been in place since December 2015,
and the site remains 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, Day Dawn Minerals NL conducted regional sampling, detecting anomalous
copper and gold at Main Dome. From 1972 to 1975, Newmont Pty Ltd carried out
extensive exploration and drilling, defining an open pit reserve primarily in
the Middle Vale Reef. In 1975, BHP Gold acquired a 30% stake due to foreign
ownership regulations, and in 1990, Newmont and BHP Gold merged their
Australian assets to form Newcrest Mining Limited. Newcrest led significant
exploration and resource drilling for over 30 years until its acquisition by
Newmont Corp on November 6, 2023. Newmont subsequently divested Telfer and
sold to Greatland Gold on the 4(th) December 2024.
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.
Mineralization 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 mineralization 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
mineralization occurs in northwest-trending and north-dipping veins. Stockwork
mineralization, 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 As provided in table 1 of this announcement.
Data aggregation methods Significant assay intercepts are reported as (A) length-weighted averages,
Intercepts are calculated using a minimum threshold of 0.5 g/t Au, allowing
for up to 5m of internal dilution. Only intercepts exceeding 5 gold gram
metres are reported.
Relationship between mineralisation widths and intercept lengths Significant assay intervals reported represent apparent widths. Drilling is
not always perpendicular to the dip of mineralisation and true widths are less
than downhole widths. Estimates of true widths will only be possible when all
results are received, and final geological interpretations have been
completed.
Diagrams As provided.
Balanced reporting Earlier results of exploration programmes conducted by Newcrest, Newmont and
Greatland Gold have previously been reported. Further drilling at telfer is
continuing with material results to be reported in subsequent announcements.
Other substantive exploration data Nil
Further work Further work is planned to evaluate exploration opportunities that extend the
known mineralisation and to improve confidence of the model.
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