4m of brecciated gneiss, quartz-chalcopyrite
veins and massive chalcopyrite
the drillhole cuts potassic altered quartz-diorite porphyry dike from 30.
Kesterites are quaternary compounds with a crystalline structure very similar to that of chalcopyrites
In other intervals (as shallow as 20m below the surface) chalcopyrite
was observed in trace to minor amounts.
The first zone consists of 101 metres of chalcopyrite
stringer followed by a second zone of 57 metres, which is interpreted by the Company to be an extension of the RM Zone (from previous drill holes RMZ10-10, 11 and 15).
The copper flotation concentrate contains Cu, Ni, Co, Fe which were associated with chalcopyrite
, pentlandite, pyrite and pyrrhotite phases respectively.
The hole contains copper mineralization as chalcopyrite
in skarn in the upper portion, and mixed secondary chalcocite and primary chalcopyrite
Analysis by X-ray diffraction shows the product to be a chalcopyrite
called copper indium disulfide.
Decreasing quartz veining and chalcopyrite
was noted towards the end of the hole.
Managing Director Tony Schoer said; "We are very encouraged by the strong chalcopyrite
mineralisation seen in the core of CETD3.
The Bagdad plant is the first commercial facility in the world to use pressure leaching to treat chalcopyrite
It should be noted that molybdenite and chalcopyrite
mineralisation was observed in other skarn and breccia zones.
The gold-silver-copper mineralization is associated with pervasive chlorite epidote alteration and is hosted within intrusive rocks, with the gold values occurring along the grain boundaries of the chalcopyrite
The upper lens, at 200 metres depth, also has a demonstrable component of magnetite associated with the massive sulphides and contains lower grade copper values, lacking chalcopyrite
replacement and upgrading.
Mineralization assemblages commonly contained pyrite with lesser pyrrhotite, with or without galena, sphalerite, chalcopyrite
, and/or arsenopyrite.
1 km west of Nova Brasilia, is formed by sulfides and carbonates associated with quartz veins (pyrite, chalcopyrite