GREATLAND GOLD PLC

Earnings Release • Feb 20, 2025

National Storage Mechanism | Additional information

RNS Number : 8447X

Greatland Gold PLC

20 February 2025

Greatland Gold plc (AIM: GGP)

E: info@greatlandgold.com

W: https://greatlandgold.com

: twitter.com/greatlandgold

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 (%)	AuEq1	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 4th 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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