From 206 meters to 210 meters, the hole intersected a hydrothermal quartz breccia, with chalcopyrite, chalcocite
, molybdenite and tourmaline, carrying anomalous values of Cu, Mo, As, Sb and Pb.
Hole ZFDDH11-192 was also drilled along this section to test the southern continuity of the chalcocite
On display in this case was the famous Bristol, Connecticut chalcocite
that appeared on the cover of Matrix, and the fine pink fluorite from Peru that appeared on the cover of the Mineralogical Record's vol.
To accommodate the expanded production rate, the Nifty open pit will move into an extended cutback phase to access deeper transitional and chalcocite
material, and oxide copper resources to the east of the existing open pit that were previously considered uneconomic.
flash converting of low iron chalcocite
in a new reactor;
Our mine planning will focus on how to expeditiously develop the zones of thick, bottom-loaded chalcocite
, grading in excess of 6% copper, near the center of Kakula's high-grade area.
Mining extracted ferruginous silicified slate with copper carbonates (malachite and azurite) passing into cuprite, native copper and minor chalcocite
in what appears to be a classic supergene profile.
Omitiomire's copper occurs mainly as the mineral chalcocite
with a copper content of 79%.
Copper mineralisation has been clearly seen in an old pit near a gravel road, together with malachite staining incorporating chalcocite
The huge new underground mine exploits a manto deposit of chalcocite
, with secondary copper minerals occurring in brecciated volcanic country rocks.
Copper mineralization is quite visible in an old pit near a gravel road and impressive malachite staining along with chalcocite
is strata bound within the more sandy beds of the sediments.
The primary and supergene sulphide mineralised zone consists of chalcocite
, pyrite, and bornite vein swarms which are silver rich.
Today the Butte mines are closed and flooded, but its mineralogical legacy of fine specimens remains--most noteably the copper sulfide and sulfosalt minerals such as bornite, chalcocite
, chalcopyrite, colusite, covellite, digenite, djurleite, and enargite, and other minerals such as barite, pyrite, quartz and silver.
The source of the copper solutions is likely to be an enriched zone of a porphyry copper consisting of easily soluble chalcocite
, covellite and copper oxide, upstream from Sagasca.
These claims incorporate projected southwestern extensions of the MAN Area copper-zinc-silver-gold sulfide mineralization, as well as the southwestern continuation of the leachable oxide copper and chalcocite
copper deposits overlying the MAN Area sulfide zone.