⚒️ Southern Hemisphere Mining Limited reports its Quarterly Activity for the period ended 31 March 2025.
- Excellent correlation between Magneto-Telluric (MT) survey, litho-geochemical depth target modelling and Induced Polarisation (IP) data over the large Curiosity Copper-Gold Target at Llahuin
- RC drilling extends strike of the Cerro-Ferro system by 15% to 2.2km, ahead of H1 2025 JORC resource upgrade including results of:
- 105m @ 0.64% CuEq from surface to EOH, incl. 16m @ 0.85% CuEq from surface and 26m @ 0.91% CuEq from 78m 24LHRC065
- 132m @ 0.48% CuEq from surface incl. 60m @ 0.67% CuEq from surface 24LHRC058
- 81m @ 0.49% CuEq from 2m to EOH, incl. 48m @ 0.58% CuEq from 30m 24LHRC055
- 122m @ 41% CuEq from 2m, incl. 48m @ 0.52% CuEq from 66m 24LHRC048
- 16m @ 51% CuEq from 102m 24LHRC051
- 128m @ 41% CuEq from 16m to EOH, incl. 32m @ 0.57% CuEq from 66m 24LHRC067
- 30m @ 0.42% CuEq from surface, incl. 26m @ 0.56% CuEq from 40m to EOH, incl. 8m @ 0.96% CuEq from 42m 24LHRC068
*Copper equivalent calculation is determined using the following metal prices and without metallurgical recovery %: Copper US$3.50/lb, Gold US$2,550/oz and Molybdenum US$20/lb with no recovery factors applied.
Figure 1 – Company Projects in Chile
⚒️ EXPLORATION ACTIVITIES
Llahuin Copper-Gold-Moly – RC Drilling Program 2024
The 2024 RC drill program completed a total of 2,728m drilled in 26 holes, 24LHRC044 to 069, and from depths of 53m to 168m.
Results include:
- 105m @ 0.64% CuEq from surface to EOH, incl. 16m @ 0.85% CuEq from surface and 26m @ 0.91% CuEq from 78m – 24LHRC065
- 132m @ 48% CuEq from surface incl. 60m @ 0.67% CuEq from surface – 24LHRC058
- 81m @ 49% CuEq from 2m to EOH, incl. 48m @ 0.58% CuEq from 30m – 24LHRC055
- 128m @ 41% CuEq from 16m to EOH, incl. 32m @ 0.57% CuEq from 66m – 24LHRC067
- 30m @ 0.42% CuEq from surface and 26m @ 0.56% CuEq from 40m to EOH, incl. 8m @ 0.96% CuEq from 42m – 24LHRC068
- 120m @ 42% CuEq from 2m, incl. 58m @ 0.49% CuEq from 66m – 24LHRC048
- 16m @ 51% CuEq from 102m – 24LHRC051
*Copper equivalent calculation is determined using the following metal prices and without metallurgical recovery %: Copper US$3.50/lb, Gold US$2,550/oz and Molybdenum US$20/lb with no recovery factors applied.
The RC drill program has resulted in the extension of the strike of the Cerro-Ferro system by a further 300m to 2.2km, and open potentially to the north and the south of Ferro.
As shown above, the drilling is all shallow, from surface with many large and wide mineralised zones, over a strike of 2.2km and open. This significantly advances the open pit potential of Llahuin, and validity of testing for longer term large underground mining scope too.
Water
All holes drilled in this campaign have intersected water at 40-60m, and a water test on hole 24LHRC053 demonstrated a flow rate of 40 litres per minute. Water test work indicates that it is fresh but not potable. This is positive for future development of Llahuin having water from the site that could be used in mine operations, potentially all sourced from the mine itself, but will be subject to further studies for confirmation at the appropriate stage.
Many of the RC holes ended in mineralisation and were stopped early due to water ingress to ensure all RC samples collected were kept dry.
Figure 2. Plan view showing the locations of drillholes of the 2024 RC drilling program. Holes in white are 2023 drill collars.
The Magneto-Telluric (MT) Deep Target Study
Curiosity Copper-Gold Target
Subsequent to the quarter end, results were reported from the recently completed deep penetrating Magneto- Telluric (“MT”) geophysical survey, completed over the 100% owned Llahuin Project.
The MT survey was successful in establishing a clear correlation between the previously announced litho- geochemical Fathom depth target model for mineralisation comprising the Curiosity Copper-Gold Target, a sub- circular target 1km to 2km in diameter and this large MT resistivity anomaly extending significantly to depth.
Ferro West Copper Target
The MT survey was also successful in defining a second large resistivity anomaly west of the Ferro deposit at Llahuin in establishing a sub-circular target 500m in diameter and extending to 500m deep.
Next Steps
The Company intends to drill test the MT resistivity target with three to six deep drillholes. The first drillhole is to collar from an existing drill pad at Llahuin to a depth of ~1,400m. This hole is designed to intersect the MT and Fathom modelling target zones. Drill planning is in progress.
(Refer Figure 6 in ASXannouncementdated15April 2025, Large MT Geophysical Copper Target at Llahuin, Chile).
Figure 3. Llahuin Magneto-Telluric 3D Inversion Resistivity long section with north to right and MT Resistivity shells with green <100 Ώm, pink <50Ώm and grey <35Ώm. Drill traces overlain.
Cardawan Copper Project
The new Cardawan licence applications (ELA 52/433 and 4434) are located approximately 160km south of Newman, and the Great Northern Highway runs through the project. The tenements are 169 and 8 blocks size respectively. (Approximately 3km2 per block).
This large copper prospect was pegged during the quarter by the Company based on an exploration concept for sedimentary hosted copper deposits. The historic Kumarina Group of copper deposits and prospects are along strike and in adjacent to other tenements to the east of Cardawan. The Abra lead silver mine is 70km west of the Cardawan Coper Project and the DeGrussa VMS copper gold silver mine is approximately 100km south.
Preliminary exploration work is in progress as an early-stage low-cost high impact copper prospect in an excellent location both geologically and strategically.
Sedimentary hosted copper deposits are common in the Zambian copperbelt.
Los Pumas Battery Metals Manganese Project 100%
The Los Pumas Project is an advanced manganese deposit for which Southern Hemisphere is seeking offtake/JV funding/sale for a long life mine to produce:
- Agriculture products for soil improvement;
- Electrolytic Manganese for steel making; and/or
- High-Purity Manganese Sulphate Monohydrate (“HPMSM”) to supply the Electric Vehicle (“EV”) and energy storage markets.
Southern Hemisphere is actively marketing this project, and welcome any inquires to cosec@shmining.com.au
Lago Lithium Brine Project 100%
The Company has prioritised expansion drilling at Llahuin, leading to the decision to relinquish the Lago Lithium Brine Project applications.
The Full PDF is available below.
COMPETENT PERSON / QUALIFIED PERSON STATEMENT:
The information in this report that relates to copper and gold exploration results for the Company’s Projects is based on information compiled by Mr Adam Anderson, who is a Member of The Australasian Institute of Mining and Metallurgy and The Australian Institute of Geoscientists. Mr Anderson has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration, and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the “Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves”. Mr Anderson is a consultant for the Company and consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.
References:
LLAHUIN COPPER-GOLD PROJECT
ASX Release – Higher Grade Copper & Strike Extension At Llahuin, Chile – 28 January 2025.
ASX Release – Llahuin Resource Positioned for Significant Expansion – 10 February 2025.
ASX Release – Large MT Geophysical Copper Target at Llahuin, Chile – 15 April 2025.
ASX Release – New Large Ferro West Shallow MT Resistivity Copper Target – 22 April 2025.
LOS PUMAS BATTERY METALS MANGANESE PROJECT
ASX Release – Company Presentation – Los Pumas Manganese Project, Chile – 20 May 2024.
ASX Release – Intension to Demerge Battery Minerals Asset – 5 July 2023.
LAGO LITHIUM BRINE PROJECT
ASX Release – Application for the Lago Lithium Brine Concessions in Chile – 10 July 2023
News Release
Date: 30 April 2025 | ASX Code: SUH | Frankfurt Exchange: NK4
===
Southern Hemisphere Mining Limited is an experienced minerals explorer in Chile, South America.
Chile is the world’s leading copper producing country and one of the most prospective regions of the world for major new copper discoveries. The Company’s projects in Chile include the Llahuin Porphyry Copper-Gold-Moly Project and the Los Pumas Manganese EV Battery Project, all of which were discovered by the Company. Th Company recently added the Cardawan Copper Project in Western Australia.
For the latest information about the Company – please visit our Latest News and Corporate Profile pages. We are also on LinkedIn and Twitter (X).
