FMR Resources’ ongoing IP survey at La Martuca within the La Lorena Project has revealed two significant sulphide chargeability anomalies, enhancing the case for a large-scale copper-gold system and setting the stage for drilling in late 2026.
- Two major sulphide targets identified by IP survey
- Central anomaly beneath historic La Martuca workings
- Northeastern target aligns with magnetic anomaly
- Resistivity data indicates hydrothermal alteration zones
- Drilling planned for Q4 2026 following 3D modelling
Two Distinct Sulphide Targets Emerge at La Martuca
FMR Resources Limited (ASX:FMR) has taken a significant step forward in its Chilean copper-gold exploration with preliminary results from an ongoing Induced Polarisation (IP) survey at the La Martuca Prospect within the La Lorena Project. Four of six planned IP survey lines have been completed, revealing two compelling sulphide chargeability anomalies that could mark extensions of mineralisation beneath historical workings and new exploration frontiers.
The first and more central anomaly sits directly beneath the historical La Martuca artisanal mine workings. This chargeability high coincides spatially with a known mineralised structure exposed underground and aligns with previously reported high-grade copper-gold rock chip samples. FMR interprets this as a strong indication that the mineralised system extends at depth, potentially representing a larger sulphide body than previously recognised.
Northeastern Anomaly Linked to Magnetic Signature
Approximately 550 metres northeast of La Martuca, a second, larger chargeability anomaly has been identified on IP line L103. This target is considered geophysically robust due to its spatial association with a magnetic anomaly detected during FMR’s recent helicopter magnetic survey. The convergence of these independent geophysical signals gives this northeastern target particular promise as a priority for follow-up exploration.
These findings build on FMR’s earlier magnetic and geological work, which has progressively outlined a structurally complex and mineralogically rich system. The integration of IP chargeability data with magnetic, geological mapping, and surface geochemistry is refining a pipeline of high-quality drill targets within La Martuca, consistent with the company’s thesis of a large-scale porphyry copper-gold system in central Chile.
Resistivity Data Supports Hydrothermal Model
Complementing the chargeability results, preliminary resistivity inversion modelling has delineated a broad zone of low resistivity west of La Martuca. This conductive feature is interpreted as clay alteration and weathering typical of hydrothermal systems, enveloping a resistive core interpreted as silicified and potassic alteration zones. Such a pattern is characteristic of porphyry systems, lending further geological credibility to the exploration model.
Advancing Towards Drilling in Q4 2026
FMR plans to complete the remaining two IP lines shortly, followed by comprehensive three-dimensional inversion modelling to better understand the geometry and extent of the identified targets. The company also intends to integrate these geophysical datasets into a 3D geological model to prioritise drill targets ahead of an initial drilling campaign scheduled for the fourth quarter of 2026.
The La Lorena Project benefits from favourable infrastructure and logistics, situated near the mining town of Combarbalá in Chile’s Coquimbo Region, with access to roads, power, and ports. The project lies within a recognised mineral district along a major trans-lithospheric fault corridor, which has historically hosted significant copper-gold deposits.
Managing Director Oliver Kiddie emphasised the encouraging nature of the results, noting the spatial correlation between geophysical anomalies and known mineralisation. He described the emerging pipeline of targets as "high-quality" and indicative of the potential scale of the system. The company’s cautious optimism is anchored in methodical integration of geophysical, geological, and geochemical data as it prepares for its maiden drill program.
Bottom Line?
FMR Resources’ geophysical advances at La Lorena sharpen the focus on high-potential sulphide targets, but the leap from anomaly to resource will hinge on drilling results expected late this year.
Questions in the middle?
- Will the upcoming drilling confirm the extent and grade of the sulphide targets beneath La Martuca?
- How will integration of 3D inversion models influence prioritisation of targets across the La Lorena Project?
- Could the northeastern sulphide anomaly linked to the magnetic signature represent a separate mineralised system?