Great Southern Copper, the UK‑listed copper‑gold‑silver explorer focused on Chile, has started an audio‑frequency magneto‑telluric (AMT) geophysics survey across the western half of the La Colorada lithocap at its Especularita project.
The survey covers about 33 km2 on 500 metre grid centres, is contracted to Southernrock Geophysics S.A., is planned to finish in two weeks with results in four to six weeks, and is designed to image resistivity contrasts to depths exceeding 1,000m to pinpoint large buried porphyry centres beneath high‑sulphidation cover, the company said.
"The AMT survey will allow us to see through the lithocap and help prioritise targets for first‑pass scout drilling, which we expect to commence early in the second half of this year," said Sam Garrett, CEO.
Scout RC drilling is already underway at the Artemisa North target with three holes completed for 414m and a fourth currently at 220m.
Samples from ART26‑RC005 and RC006 have been delivered to ALS Laboratories in Santiago and, once Artemisa North is finished, the programme will move to Artemisa South and Victoria while mapping, sampling and metallurgical work continues at Cerro Negro, Viuda and Mostaza.
The Especularita project lies at low altitude within Chile's coastal metallogenic belt about 100 km south of Coquimbo and sits on a structural trend that links it to large porphyry systems including Los Pelambres, Altar and El Pachon.
Results from the AMT survey are expected within four to six weeks.
