⚒️ Southern Hemisphere Mining Limited reports interim drilling results demonstrate a Major Strike Extension (from RC drilling south of the Ferro deposit) at the Company’s Llahuin Copper-Gold-Moly Project in Chile.
- RC Drilling has extended the already large strike of 1.9km to 2.2km, ahead of H1 2025 JORC resource update including results of:
- 81m @ 0.49%CuEq from 2m, incl. 48m @ 0.58% CuEq from 30m 24LHRC055
- 122m @ 0.41% CuEq from 2m, incl. 58m @ 0.49% CuEq from 66m 24LHRC048
- 16m @ 0.52% CuEq from 102m 24LHRC051
- Numerous holes open at depth for diamond tails in Q1
- Potential feeder zone at Cerro identified from RC drilling and pre-collar now in place for diamond drilling
- Magneto-Telluric (MT) survey in progress for deep copper targets to complement existing IP, litho-geochem and drill data
Figure 1. RC rig on location drilling the Ferro extension at Llahuin.
Chairman Mr Stowell reported:
“Our team continues to demonstrate the Llahuin Copper-Gold-Moly deposit’s large scale with the latest drill results extending the strike of the Cerro-Ferro deposits by 300m from 1.9km to over 2.2km.
The system is still open along strike both north and south with the benefit of mineralisation largely from surface, optimum for open-pit mining configuration.
Importantly, recent results also confirm a significant untested expansion of the Cerro-Ferro deposits, for strike, plunge and dip extensions.
Regionally, the work we have undertaken is also starting to demonstrate what is on offer across the broader Llahuin Copper-Gold-Moly Project.
As previously highlighted, we are particularly interested in the new Curiosity Target at Southern Porphyry, south of Ferro, and have commissioned a more detailed Magneto-Telluric (MT) survey with tighter line spacing than originally completed, and extending this over and past the Cerro and Central deposits. MT is a passive geophysical method which uses natural time variations of the earth’s magnetic and electrical fields to measure the electrical resistivity of the sub-surface deep target geophysics systems. MT has been successful in identifying a number of world-class copper porphyry deposits, including the Chilean Valeriano deposit – Atex Resources (TSX: ATX.V).
We are on track to advance the resource towards an updated Mineral Resource Estimate for the Llahuin Copper-Gold-Moly deposits in H1 2025. It is important to also note that our longer-term exploration journey at Llahuin continues to show that the full potential of this flagship asset extends far beyond what has been published in JORC resources to date.
The Company remains well funded, holding A$4m in cash at the end of the last quarter.”
Figure. 2. Llahuin Copper-Gold-Moly Project location and tenure map.
Figure 3. Plan view of all holes drilled this campaign Oct-Dec 2024.
Ferro South Extension
Recent RC drilling has started to define a new zone south of the Ferro zone with wide intercepts recorded in the drilling.
The drilling has extended the zone for over 300m to the southwest and the mineralisation is open in that direction and requires more drilling to better define the extension.
The Company’s exploration programs have been targeted at increasing the resources at the Llahuin Project and this program is doing just that. The soil anomaly drilled last year disappears to the southwest as the area is covered with colluvium so the SW part is blind to geochemistry. Three sections have been completed to date and show the mineralisation to be flat lying higher than resource grade manto-style mineralisation at this stage.
The relevant area is circled in yellow in the map below.
Figure 4. 3D view looking northeast from Southern Porphyry (SP) to Central Porphyry, showing the scale of the Llahuin mineralising system with Ferro extension in yellow circle, and the newly identified East Porphyry zone in the green circle (colluvium covered up to 5m deep).
Figure. 5. Ferro South extension plan view of drillholes.
Figure 6. Ferro South extension cross section of holes 24LHRC047 and 24LHRC048
Cerro Feeder Zone identified for deeper drilling
Drilling at Cerro has intersected similar near surface mineralisation testing the western extents at Cerro with holes 24LHRC054 and 24LHRC055.
RC holes are drilled dry and are stopped when the sample goes wet so are ready for diamond tails to be completed next year.
Successful RC drilling has defined a feeder zone within the Cerro Deposit for diamond drilling to extend to depth in the next round of diamond drilling.
Figure 7. Cerro drilling and results cross section for RC holes 24LHRC053 and 24LHRC055, in readiness for diamond tail extension to depth in hole 24LHRC055.
Geophysics and Modelling
A fault zone model has been completed by Fathom Geophysics to advance the understanding of the mineralising and barren faults using geophysics for better targeting of future drilling.
The Company has engaged Southern Rock Geophysics to extend and infill the historical MT survey at Llahuin. Work on the MT survey at Llahuin began on Wednesday 4 December 2024 and is expected to take two weeks to complete. The MT survey is expected to assist with deep hole targeting at CerroFerro and the Southern Porphyry target and will complement the Fathom deposit footprint models, as well as the IP Dataset that covers most of the concession holdings and key targets.
Figure 8. MT lines -blue existing data, red, infill and extension north and east.
The Fathom, IP, MT work to date, as well as the Santa Maria epithermal vein system workings correlate to the large Curiosity Copper target south of the Ferro deposit.
The current MT program will infill the line spacing from 400m to 200m, possible infill to 100m and extend the MT north across the Cerro and Central deposits and evaluate potential north of those.
Figure 9. MT survey data prior to the new program underway, showing the large Curiosity Copper target which coincides with the Fathom litho-geochem target as well as IP.
Ferro East
Rock chip sampling has identified a new large target at Ferro East. This work was a follow up of a soil anomaly which shows elevated copper 1,300ppm and moly 17ppm in soil.
A total of 44 samples were collected in outcrops exposed in streams and the main river (Figure. 3), 33 samples in the mainstream direction NS and 11 samples in the secondary stream direction EW.
The area is interesting with exposed intrusive with in parts extensive stockwork veining with elevated copper, moly and gold was panned from the subvertical component of the stockwork veins exposed in the main river in the northern part of the exposure on the main creek at Llahuin.
Note the elevated soil was in a small area of residual soil in an area covered with significant colluvium thus all colluvium area’s soil sampled need to be further checked.
Figure 10. Rock samples from new target East Porphyry east of the Ferro deposit, mostly covered by colluvium so largely blind to geochemistry.
PhD Copper Porphyry Experts
The Company has hosted a number of porphyry copper experts at site, and they have provided invaluable input to the Project and its potential. This work is being incorporated into modelling and planning of ongoing programs.
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 a significant 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 which would be subject to further studies for confirmation at the appropriate stage.
Results from the RC drill campaign continue to be received from the laboratory and will be reported in due course, along with other exploration advancements.
TABLE 1 – Significant Drill Results
Copper equivalent calculation is determined using the following metal prices and without metallurgical recovery %: Copper % + gold g/t x 1.0625 + moly ppm x 0.005714 =CuEq
News Release
Date: 11 December 2024 | ASX Code: SUH | Frankfurt Exchange: NK4
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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 include the Llahuin Porphyry Copper-Gold-Moly Project, the Lago Lithium Exploration Project, and the Los Pumas Manganese EV Battery Project, all of which were discovered by the Company.
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