⚒️ Southern Hemisphere Mining Limited reports drilling has commenced at Target L – vectoring toward the porphyry source at the Southern Porphyry, within the Llahuin Copper-Gold-Moly Project in Chile.
- Diamond drilling has commenced at Target L – 26LHDD073 is the fourth drillhole of the Phase I program at Southern Porphyry.
- Target L defined by integrated structural and geochemical vectors from 26LHDD072.
- Structural data indicates vector south and east and toward the interpreted porphyry source.
- Target L is the first hole designed as a systematic step closer to the interpreted mineralised core of the Southern Porphyry system.
Southern Hemisphere Mining Chairman Mark Stowell commented.
“We are looking forward to the results of Target L – given that we are now vectoring to the potential copper source, using known copper mineralised vein orientation obtained from the first 3 diamond core holes.”
Photo 1. Drilling underway at Target L
FMR Resources Managing Director, Mr Oliver Kiddie, commented (FMR is Southern Hemisphere Mining’s JV partner for the Southern Porphyry Target at Llahuin):
“Drillhole 26LHDD072 confirmed we are within the mineralised intrusive footprint of a significant porphyry system, with visible copper and molybdenite sulphides hosted across multiple porphyry phases.* Structural and geochemical vectors now indicate a clear direction south, east and at depth. Target L is designed as the first test of this refined interpretation and search space and represents a step closer to the interpreted porphyry source.”
Target L
Target L has been defined through the integration of:
- Structural vein orientation data from 25LHDD070, 25LHDD071, and 26LHDD072
- Multi-element geochemical analysis
- Whole-rock geochemistry and petrography
- Geological logging of intrusive phases and alteration signatures
- Aeromagnetic interpretation
Drillhole 26LHDD072 intersected multiple porphyry intrusive phases, including granodiorite porphyry, andesitic porphyry and diorite porphyry, associated with quartz–sulphide veinlets and disseminated chalcopyrite and molybdenite mineralisation.* The presence of these intrusive phases and sulphide assemblages confirms that the drillhole is located within the mineralised intrusive footprint of the system and is interpreted to be closer to the source than previous drilling.
Structural measurements show a transition from the consistent NNE-striking sheeted veins observed in 25LHDD070 and 25LHDD071 to more variable ENE-striking veins with SSE dip in 26LHDD072. This change is interpreted to reflect increasing structural complexity toward the porphyry source.
Target L is designed to test the interpreted structural and geochemical vector south of 26LHDD072 and east of 25LHDD071.
Drilling of Target L is designed to a planned target depth of 1,200m.
*Cautionary Statement: Visual estimates of mineral abundance should never be considered a proxy or substitute for laboratory analyses where concentrations or grades are the factor of principal economic interest. Visual estimates may also provide no information about impurities or deleterious physical properties relevant to valuations. Refer to FMR’s ASX release dated 26 February 2026.
Figure 1. Plan view of Southern Porphyry, showing surface projections of geophysical models and completed and planned drill targets.* *Refer to FMR ASX announcements dated 9 July 2025, 26 August 2025, 23 October 2025, 10 November 2025, 25 November 2025, 3 December 2025, 3 February 2026, and 26 February 2026.
Figure 2. Cross section L-L’, Target L, showing geophysical models and proposed drillhole to 1,200m downhole depth, testing new structural and geochemical vectors east of Target C and south of Target K (+/- 10m window).* * Refer to FMR ASX announcements dated 9 July 2025, 26 August 2025, 23 October 2025, 10 November 2025, 25 November 2025, 3 December 2025, 3 February 2026, and 26 February 2026.
Geological Interpretation
Integration of geological and geophysical datasets indicates that the modelled MT anomaly is likely responding to pyrite-rich peripheral mineralisation, rather than directly mapping the copper–molybdenum core. Exploration targeting has therefore prioritised structural and geochemical vectors ahead of IP/MT resistivity features. Downhole geophysical data from Target K is currently being processed before integration with existing surface models and downhole data from Targets A and C. Target L represents the next systematic step in testing the interpreted location of the porphyry source within the Southern Porphyry corridor.
Geological Setting
The Southern Porphyry target is located within a six-kilometre-long mineralised corridor with the Llahuin Project, which hosts multiple copper–gold–molybdenum porphyry centres (see Figure 3). Field mapping completed in June and July 2025 identified argillic alteration, silicification and epithermal quartz veining at the surface, along with zones of secondary copper mineralisation assemblages typical of the upper levels of a copper porphyry system. * Re-logging of historic drillholes confirmed these features at depth, with intervals showing hydrothermal alteration, silicification, and disseminated chalcopyrite–pyrite mineralisation. These observations suggest a telescoped system, characterised by epithermal-style veining and alteration preserved above a deeper porphyry core.*
* Refer to FMR ASX announcement “Phase I Drilling Target Areas Refined at Southern Porphyry” dated 9 July 2025
Next Steps
- Drilling at Target L to planned depth
- Ongoing integration of geological, structural, and geochemical datasets
- Refine 3D model of the porphyry system
- Provide updates as drilling progresses
Figure 3. Southern Porphyry target area within the Llahuin Project Joint Venture concessions*
The Full PDF is available below.
Competent Persons Statement The information in this announcement that relates to Exploration Results, Geophysical Results and Interpretations is based on information compiled by Mr Luke Marshall, who is a Member of the Australian Institute of Geoscientists. Mr Marshall is a Consultant to FMR Resources Limited. Mr Marshall has sufficient experience relevant to the style of mineralisation and type of deposit under consideration, and to the activity being undertaken, 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” (JORC Code). Mr Marshall consents to the inclusion in this announcement of the matters based on their information in the form and context in which it appears. Compliance Statement The information in this announcement that relates to previously reported Exploration Results is extracted from announcements titled: “Phase I Drilling Target Areas Refined at Southern Porphyry” dated 9 July 2025 “Geophysical Remodelling Confirms Compelling Drill Targets at Southern Porphyry” dated 13 August 2025 “Southern Porphyry Phase I Drill Targets Finalised” dated 26 August 2025 “Mineralised Indicators as drilling nears Main Porphyry Target” dated 23 October 2025 “Copper and Potassic Alteration Above Main Porphyry Target” dated 10 November 2025 “Extensive Porphyry Footprint at Southern Porphyry”, 25 November 2025 “Geophysics Completed and Drilling underway at Target C”, 3 December 2025 “Visual Mineralisation associated with MT anomaly at Target C”, 3 February 2026 “Broad Intersections of Mineralised Porphyry at Target K”, 26 February 2026
Competent Persons Statement
The information in this announcement that relates to Exploration Results, Geophysical Results and Interpretations is based on information compiled by Mr Luke Marshall, who is a Member of the Australian Institute of Geoscientists. Mr Marshall is a Consultant to FMR Resources Limited. Mr Marshall has sufficient experience relevant to the style of mineralisation and type of deposit under consideration, and to the activity being undertaken, 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” (JORC Code). Mr Marshall consents to the inclusion in this announcement of the matters based on their information in the form and context in which it appears.
Compliance Statement
The information in this announcement that relates to previously reported Exploration Results is extracted from announcements titled: “Phase I Drilling Target Areas Refined at Southern Porphyry” dated 9 July 2025 “Geophysical Remodelling Confirms Compelling Drill Targets at Southern Porphyry” dated 13 August 2025 “Southern Porphyry Phase I Drill Targets Finalised” dated 26 August 2025 “Mineralised Indicators as drilling nears Main Porphyry Target” dated 23 October 2025 “Copper and Potassic Alteration Above Main Porphyry Target” dated 10 November 2025 “Extensive Porphyry Footprint at Southern Porphyry”, 25 November 2025 “Geophysics Completed and Drilling underway at Target C”, 3 December 2025 “Visual Mineralisation associated with MT anomaly at Target C”, 3 February 2026 “Broad Intersections of Mineralised Porphyry at Target K”, 26 February 2026
News Release
Date: 5 March 2026 | 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 flagship Llahuin Porphyry Copper-Gold-Moly Project and the Los Pumas Manganese EV Battery Project, both of which were discovered by the Company.
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