Great Southern Copper PLC (LSE:GSCU) said sampling at the Cerro Negro target at Especularita in Chile has confirmed copper-silver mineralisation extends to the south and east of the Mostaza mine.
Exploration rock grab and channel from 162 samples ranged up to 4.64% copper and 177ppm silver.
GSC said the results extend the high-grade Mostaza mineralised system 1.5km to the south and is open while additional high-grade vein breccia mineralisation was also confirmed up to 400m to the east
Prospect-scale mapping and sampling are now underway at Cerro Negro to determine the potential for the Mostaza-style high-grade, mineralisation to extend along strike to the south.
Preparation for drilling at Cerro Negro is also advanced, with a land access proposal having been presented to community landowners.
Sam Garrett, GSC chief executive, said: "These results confirm that high-grade, structurally controlled copper-silver mineralisation extends up to 1.5km further south along the trend of the Mostaza copper-silver mine and up to 400m further to the east.
“The occurrence of highly anomalous barium associated with lithocap type rocks that are depleted, or leached, of primary copper, is a strong indicator for the potential of a larger disseminated type porphyry copper type system at depth beneath the lithocap.
"The presence of these indicators reinforces confidence in our targets for the Mostaza deposit.”