⚒️ Southern Hemisphere Mining Limited reports encouraging results from expansion drilling at its Llahuin Copper-Gold-Moly project in central Chile.
- The first round of drill results of the 2023/24 drilling program are encouraging, indicating substantial exploration upside in the scale of the Llahuin Copper-Gold-Moly open pit style deposits
- Better intercepts include:
- 156m at 0.51% CuEq from surface in 23LHRD027, including 82m at 0.67% CuEq from 46m and 26m at 0.75% CuEq from 48m.
- 136m at 0.47% CuEq from 42m in 23LDRD028, including 32m at 0.66% CuEq from 100m.
- A new structural interpretation and revised drillhole orientation are proving to be effective.
- Compilation and 3D modelling of the results are confirming the new interpretations, indicating that mineralisation is open to the West and South-East.
Further drill results and news flow in progress.
Figure 1. RC rig in action at Cerro De Oro, with Central Porphyry workings in the centre background
Laboratory results for the first three holes of a 17-hole program mainly at the Cerro and Ferro deposits targeting resource expansion along strike and at depth.
- 156m at 0.51% CuEq, (0.41% Cu, 0.09ppm Au, and 63ppm Mo) from surface in 23LHRD027
- 136m at 0.47% CuEq, (0.27% Cu, 0.17ppm Au, and 167ppm Mo) from 42m in 23LHRD028
- 18m at 0.46% CuEq, (0.25% Cu, 0.24ppm Au, and 83ppm Mo) from 66m in 23LHRD033
A significant amount of detailed structural mapping and surface sampling has resulted in a new interpretation of the Llahuin mineralised system and a change in preferred drilling orientation.
The new interpretation and resultant change in drilling orientation appear to be valid, with the new holes intersecting more of the higher-grade vein swarm structures than prior historical drilling.
Holes 23LHRD027 and 23LHRD028 were targeting an expansion of the Cerro deposit West and at depth, and both were successful.
This data now predicates further drilling to the West and depth in the next campaign.
Figure 2. Cross section through 23LHRD027, 23LHRD028, and 23LHRD033, showing reported intercepts. Note that historical holes are omitted from the cross section for the purpose of clarity, as they are oblique to the section, at a sub optimal angle to interpreted mineralisation.
Figure 3. Plan view showing the collar locations of the drillholes reported in this announcement.
Background Work and Ongoing Programs
Systematic programs of surface geochemistry, surface mapping, structural interpretation, and historical hole re-logging and multi-element assaying were used to plan the current drilling program. This leadup work has proved critical in identifying zones for substantial expansion and drill locations.
A new 3D model incorporating the latest drilling and geological interpretation is under construction. This work involves implicit modelling of grade and geological domains, followed by constrained manual interpretation. The resulting models will generate a revised Mineral Resource Estimate (MRE) (currently 169mt at 0.4%CuEq) on completion of exploration drilling for a 20+ year mine life estimate.
Figure 4. 3D view looking northeast from Southern Porphyry (SP) to Central Porphyry, showing the scale of the Llahuin mineralising system.
Terraspec data is also being systematically collected over Central Porphyry to aid identification of alteration assemblages associated with the deposit. This project is ongoing. If successful at Central Porphyry, this program will be expanded to the other deposits at Llahuin and assist vectoring towards higher grade feeder zones at depth feeding the known deposits.
Field mapping and surface sampling programs are ongoing at Southern Porphyry, extending North to the southern extent of Ferro. This program aims to define the nature and extent of the mineralising systems, particularly at Southern Porphyry, which is a very large greenfield opportunity at the Llahuin Project. Southern Porphyry extends the strike length of the known mineralising system at Llahuin to approximately 3.7km. Further updates on this large target will be reported as the various stages of technical work is completed.
Figure 5. Location map of SUH projects in South America.
Further drilling and other results will be reported in due course.
The Full PDF is available below.
Date: 15 January 2024 | ASX Code: SUH | Frankfurt Exchange: NK4
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.
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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