London-listed Great Southern Copper has engaged Chilean firm Southernrock Geophysics to complete a 33-square-kilometre audio-frequency magneto-telluric (AMT) geophysics survey it claims can help it “see through the lithocap blanket” at its La Colorada porphyry copper-gold target in Chile.
“The AMT survey is planned on 500m grids, with expectations to map depths exceeding 1000m, depending on the rock resistivity,” Great Southern said.
“The technique measures natural electromagnetic fields on the Earth’s surface, generated by phenomena such as lightning and solar winds, to map subsurface electrical resistivity. This mapping assists in identifying geological units and potential mineral deposits, crucial for porphyry systems where resistive intrusions and conductive alteration halos are key indicators.”
The company’s Especularita project area sits on a trend of significant copper deposits including Los Pelambres, Altar and El Pachon.
Results of the AMT survey expected in 4-6 weeks would guide first-pass scout drilling, management said.
“Used in conjunction with ongoing soil geochemistry and spectral rock studies, the survey will help refine and prioritise targets for first-pass scout drilling across the lithocap, which we expect to commence early in the second half of this year,” CEO Sam Garrett said.
