Castillo Copper Limited (ASX: CCZ) has defined the drill targets for the Ayra prospect within its Mt Oxide project in Queensland.
Managing Director, Simon Paull, said a 14-hole, ~3432m drill programme has been designed to test for supergene copper mineralisation near surface and potential massive sulphides at depth.
The RC drilling campaign for the Arya prospect will cover an area ~1,500m by ~1,000m that will target near surface, potential mineralisation along faulting, and deeper geophysical anomalies
The countdown to drill the Arya prospect, within the Mt Oxide pillar, has now begun,” Mr Paull said.
Having secured all necessary regulatory approvals, our focus moves to logistics which includes appointing a drilling contractor, support teams and ensuring clear access to site.
“The drilling programme has been exceptionally well designed, and our clear objective is to test for shallow supergene copper mineralisation and potential massive sulphides at depth.”
Three deep vertical drill-holes, that are spaced ~210m apart, are slated for the interpreted potential massive sulphide bedrock conductor EG01. This anomaly is interpreted to be ~130m thick, with dimensions ~1,500m by ~450m, and ~426m depth below surface.
The remaining 11 drill-holes will target EG02, EG10, several GEOTEM anomalous peaks interpreted at shallower depths and potential mineralisation along the fault. Specifically, EG02 and EG10, which are interpreted to comprise supergene mineralisation, are 25m below surface, 25m thick with dimensions ~160m by 50m and ~270m by 280m respectively.
Work done by BHP and other groups confirmed high-grade supergene copper mineralisation at surface, based on assayed rock chip samples, up to 7,400ppm Cu1 and 18,400ppm Cu2 respectively.
More significantly, BHP1 discovered EG01, EG02 and EG10 in the 1990s but due to exogenous factors at the time, possibly the prevailing base metal downturn, did not follow through and drill the target considered highly prospective at EG01.
