RE: RNS11 Mar 2026 10:15
Footprint is expanding. From the northern edge of the Mostaza mine to this intercept in hole DD042 now outlines significant Cu-Ag mineralisation over a strike length of at least 400m. This is set within a 2.5km trend along the Mostaza fault zone where evidence of extensive surface alteration and mineralisation in conjunction with geophysical anomalies has now been identified by GSCU. Broadly speaking Lenses 1-5 cover c.800m of the trend but as we saw from our site visit last year, high-grade mineralisation is clearly evident at surface in multiple places along the wider trend suggesting potential to substantially expand the footprint of mineralisation. Results from Phase III scout RC holes further along strike are pending. (see Figure 1) Encouraging implications. Interestingly, the top of hole DD042 intersected a Pb-Zn-Ag rich silica breccia zone with grades up to 22.4g/t Ag, 1.39% Pb and 0.34% Zn - similar to the mineralisation identified in the hanging-wall to Lens 2. This is then underlain by high-grade chalcocite-clay mineralisation - consistent with the deposit architecture recognised below the Mostaza mine. This appears to confirm that mineralisation represents a potential extension of the Mostaza Lens 2. The results also suggest that mineralisation may be coalescing and/or thickening to the south which would obviously be advantageous from any potential mining standpoint. Prior assays from Phase III (11th Dec & 18th Feb) indicated potential for a stacked system and numerous mineralised events with drilling now consistently intersecting stacked high-grade Cu-Ag lenses. Next steps. Remaining assays are pending for the final diamond holes and the 6 RC holes from Phase III, not helped by current congestion in lab turnaround times due to the rapid increase in exploration activity in Chile. Also upcoming are the metallurgical test work results on high-grade Cu-Ag material which should help to frame the commercial opportunity represented by Mostaza and the wider Cerro Negro trend. Fully funded Phase IV drilling is in the planning stage which will continue step-out exploration but critically, GSCU will now start resource in-fill drilling with a focus on Lens 2 between the Mostaza mine and the high-grade mineralisation intersected in holes DD07 and DD042. The next phase of drilling at the Viuda (Maricunga-style porphyry gold system) is also due to start shortly. 2026 is shaping up to be a pivotal year for GSCU and whilst focus remains on stepping out to extend the footprint of mineralisation, the resource in-fill drilling likely heralds the start of moving Mostaza along the development curve. This remains highly compelling given the shallow high-grade copper and silver mineralisation (two of the commodities with the best fundamentals) in an area of good infrastructure, access to power and a number of operating mills in the area.
Sign In
Follow the stocks
