C29 Metals Ltd (ASX:C29) has intersected visible copper-iron sulphides in the form of chalcopyrite in a maiden reverse circulation (RC) drilling campaign at the Mayfield Copper-Gold Project in the Mt Isa Inlier of northwest Queensland.
Seven RC holes were completed over 2,488 metres, with three holes returning what C29 describes as “substantial downhole widths of visible chalcopyrite mineralisation” within a larger redrock alteration halo.
Redrock alteration is a typical feature of iron ore-copper-gold (IOCG) systems, where sulphide mineralisation follows the same paths as copper-gold mineralisation.
The best result was from hole MFRC008, which appears to have visual chalcopyrite vein concentrations of 10% at shallow depths of less than 60 metres downhole.
Formal assays to come
“We remain excited with observations from our maiden drilling at Mayfield, with extensive intense alteration encountered in most holes drilled and significant visual copper sulphide mineralisation observed in three separate settings,” C29 Metals executive director Jeremy King said.
“As an initial test of prospective ground for IOCG-style mineralised systems we are already seeing significant widths of copper mineralisation in drilling, underlining the potential for fresh discoveries to be made at Mayfield.
“We look forward to announcing results from drilling in early February and for the last two holes in early March.”
C29 has already completed a downhole electromagnetic (DHEM) survey in hole MFRC004 and will pursue similar surveys in the other two promising drill holes once weather permits.
All samples have now been shipped to the ALS laboratory in Mt Isa, with 1-metre samples of particular interest submitted for analysis.