FMR Resources has reported assay results from three diamond drillholes at the Southern Porphyry target within its Chilean Llahuin Project, confirming a large, vertically extensive porphyry-related hydrothermal system. While the causative porphyry core remains untested, elevated gold and molybdenum values suggest proximity, prompting plans for a focused Phase II drill program.
- Broad gold-copper-molybdenum anomalism confirms extensive porphyry system
- Drilling intersected fertile intrusions but not the causative porphyry core
- Elevated Au:Cu ratios and molybdenum point to peripheral position above core
- Integration of geophysical and geochemical data underway for Phase II targeting
- Phase II drilling to test higher-grade core positions at depth and along strike
Assays Confirm Extensive Mineralised Envelope
FMR Resources Limited (ASX:FMR) has unveiled assay results from three diamond drillholes at the Southern Porphyry target of its Llahuin Project in Chile, revealing a large and vertically extensive porphyry-related hydrothermal system. The drillholes, 25LHDD070, 25LHDD071, and 26LHDD072, intersected broad zones of gold, copper, and molybdenum anomalism hosted within intensely altered volcanic and intrusive rocks, alongside extensive quartz–anhydrite veining and hydrothermal brecciation.
Highlight intersections include 124 metres at 0.31% copper equivalent (CuEq) from 258 metres in hole 25LHDD071, featuring 20 metres at 0.48% CuEq, and 104 metres at 0.16% CuEq from 522 metres in 26LHDD072. These results confirm the presence of a fertile mineralised system, but crucially, detailed petrographic and lithogeochemical analysis indicates that the drilling has yet to intersect the causative porphyry intrusion, the mineralised core that typically hosts higher-grade mineralisation.
Geological Interpretation Points to Peripheral Drilling
The elevated gold-to-copper ratios and strong molybdenum anomalism suggest that the current drilling is positioned above or on the margins of the porphyry system. The lack of a well-developed potassic alteration core and the dominance of phyllic and sodic-calcic alteration support this interpretation. Managing Director Oliver Kiddie emphasised that while the team has intersected fertile intrusions and a mineralised hydrothermal envelope, the core of the system remains untested, leaving significant exploration upside.
This style of mineralisation, characterised by broad zones of Au–Mo–Cu anomalism and hydrothermal brecciation peripheral to a concealed porphyry centre, aligns with recent findings from peer projects. For instance, ATEX Resources Inc.’s Valeriano Project in Chile returned similar peripheral mineralisation intersections, reinforcing the expectation of a concealed, higher-grade core beneath the current drill footprint.
Integration of Multi-Disciplinary Data to Guide Next Phase
FMR is actively integrating assay results with petrographic studies, structural data, and geophysical datasets, including magnetotelluric (MT), induced polarisation (IP), and downhole geophysics, to refine the geological model and define Phase II drill targets. This approach aims to pinpoint the concealed porphyry core and higher-grade mineralised zones for more focused drilling.
The company’s recent drilling at Target L, which intersected broad mineralised porphyry and stockwork breccia zones with visible copper and molybdenite sulphides, underscores the potential scale of the system and the value of integrating multiple datasets to vector toward the core. These results, reported in March 2026, complement the Southern Porphyry findings and provide further confidence in the regional prospectivity of the Llahuin Project.
Phase II Drilling to Target Porphyry Core
Looking ahead, FMR plans to commence Phase II drilling aimed at testing the interpreted higher-grade core positions at depth and along strike. The upcoming program will leverage the integrated geological and geophysical models to optimise drillhole placement, seeking to unlock the full potential of this extensive porphyry system.
While assay results for some drillholes remain pending petrographic analysis, the current data set establishes a compelling case for continued exploration. The Llahuin Project’s joint venture structure with Southern Hemisphere Mining Limited (ASX:SUH) further supports ongoing investment in delineating this significant copper-gold-molybdenum system.
Bottom Line?
FMR’s Southern Porphyry drilling confirms a fertile mineralised system with the core porphyry yet to be tested, setting up Phase II drilling as a critical step in defining higher-grade resources.
Questions in the middle?
- Will Phase II drilling successfully intersect the causative porphyry core and upgrade resource confidence?
- How will integration of geophysical and geochemical datasets refine targeting accuracy for deeper mineralisation?
- What scale and grade improvements might emerge from testing the concealed core compared to peripheral zones?