Broad intersections of mineralised porphyry at Target K within Southern Porphyry at Llahuin Copper-Gold-Moly Project

⚒️ Southern Hemisphere Mining Limited reports drillhole 26LHDD072 at Target K has intersected multiple porphyry intrusive phases with visible Copper and Molybdenite sulphides, confirming that drilling has intersected the outer mineralised zones of this extensive system at the Southern Porphyry Target within the Llahuin Copper-Gold-Moly Project in Chile.

• Drillhole 26LHDD072 completed to a depth of 1,038.2m at Target K
• The drillhole intersected multiple broad, mineralised porphyry intrusive phases between 251m and 825m depth downhole
• Visible* copper and molybdenite observed within quartz–sulphide veinlets and disseminations in and around porphyry intrusions
• Structural data indicates vector south and east of completed drilling toward the interpreted mineralised porphyry source, with new drillhole planning underway

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 has intersected multiple porphyry intrusive phases with visible copper and molybdenite sulphides, confirming that we have intersected the outer mineralised zones of this extensive system. The change in vein orientations and the distribution of sulphides provide a clear structural vector to the south, east, and at depth. Importantly, our integrated datasets now suggest the MT anomaly is likely mapping pyrite-rich peripheral mineralisation around the copper–molybdenum core. The next hole will be designed to test this refined interpretation as we continue to systematically vector toward the mineralised porphyry source.” 

Photo 1. Abundant molybdenite mineralisation from 701m downhole in 26LHDD072* (refer to Appendix 1). *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.

FMR Resources Limited (ASX:FMR) (“FMR” or “the Company”) advises that diamond drillhole 26LHDD072, the third hole of the Phase I program at Southern Porphyry, has been completed to a final depth of 1,038.2 metres at Target K. The Southern Porphyry target is within the Llahuin Project Joint Venture, with Southern Hemisphere Mining Limited (ASX: SUH), Chile.

26LHDD072 drill collar is located ~250m south-west of Target A and ~400m east-south-east of Target C. The drillhole was designed to test a corridor between Targets A and C defined by geological, structural, and geophysical vectors.

Geological Summary – 26LHDD072

Drillhole 26LHDD072 intersected multiple porphyry-related intrusive phases, including Andesitic Porphyry, Diorite, a substantial interval of Granodiorite Porphyry, and Diorite Porphyry. These intrusive units are associated with stockwork, pervasive silicification, and breccia development and are interpreted to represent porphyry-style magmatic phases.

Broad zones of visible sulphide mineralisation* were recorded within several intrusive intervals, including chalcopyrite within quartz–sulphide veinlets and molybdenite hosted in quartz veins and in fractures (see Figure 2, Photos 1 and 2, and Appendix 1). Copper anomalism confirmed with pXRF is associated with porphyry intrusive phases with fractured and brecciated intervals with quartz–anhydrite veining, confirming the presence of a copper–molybdenum sulphide assemblage typical of mineralised porphyry systems.

Photo 2. Zone of intense pyrite-chalcopyrite-quartz vein style and fine disseminated mineralisation from 809m downhole in 26LHDD072* (refer to Appendix 1). *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.

The presence of porphyry intrusions, with associated visible copper and molybdenum sulphides, indicates that 26LHDD072 is located within the mineralised intrusive footprint of the system and is interpreted to be closer to the source than the previous drillholes 25LHDD070 and 25LHDD071 (see Figure 3).

Downhole geophysical data from Target K is currently being collected and processed before integration with existing surface models and downhole data from Targets A and C.

Figure 1. Plan view of Southern Porphyry, showing surface projections of geophysical models, mapped epithermal veining at surface, 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 10 February 2026.

Figure 2. Cross section K-K’, Target K – 26LHDD072, showing geophysical models and completed drillhole to 1,038.2m downhole depth, including mid-level shallow IP Resistivity and IP Chargeability features, and a large MT high amplitude feature at depth (+/- 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 10 February 2026. 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.

Figure 3. Hydrothermal alteration zones associated with porphyry copper deposit (modified after Lowell & Guilbert 1970) with interpreted locations of completed FMR drillholes 25LHDD070, 25LHDD071, and 26LHDD072.

Structural and Geophysical Vectoring

Structural measurements from drillholes 25LHDD070 and 25LHDD071 define a consistent sheeted vein set striking NNE with moderate ESE dip. In contrast, vein orientations in 26LHDD072 are more variable, with an average ENE strike and moderate SSE dip. This change in orientation is interpreted to reflect increasing structural complexity toward a fluid source, providing a vector to the south, east, and at depth relative to Target K. Integration of geological observations with surface and downhole geophysical datasets suggests that the modelled MT anomaly is primarily responding to zones of strong pyrite mineralisation, potentially mapping the pyrite-rich shell of the system rather than the coppermolybdenum-rich ore shell (see Figure 3). On this basis, 26LHDD072 was terminated prior to intersecting the centre of the MT anomaly. The combined structural, geological and geochemical interpretation now indicates that the porphyry source may lie south and east and below the current drill position.

Whole-Rock Geochemistry and Petrography

Whole-rock geochemical analysis of anhydrite–pyrite samples continues. In parallel, thinsection petrography of key lithologies and alteration assemblages is ongoing to characterise mineral relationships, alteration zoning and paragenesis, contributing to the reconstruction of the porphyry system geometry. Multi-element geochemical data are being analysed in conjunction with whole-rock geochemistry and petrographic observations to identify alteration patterns and elemental associations indicative of proximity to the porphyry core. Integration of these datasets will assist in refining geochemical vectors and prioritising subsequent drill targeting within the Southern Porphyry system.

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 4). 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

• Complete integration of geological and downhole geophysical datasets from Targets A, C and K
• Refine three-dimensional interpretation of the porphyry system
• Design and commence the next drillhole to test the interpreted porphyry source south and east of Target K
• Provide further updates regarding assay results, interpretations, and drilling progress.

Figure 5. Southern Porphyry target area within the Llahuin Project Joint Venture concessions*

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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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