Moving ahead with a potential mine at Bornite
will provide more jobs, royalties, and contracting opportunities.
Although the degree of enrichment (fractionation factor) is different for a variety of copper sulfides (chalcopyrite, chalcocite, bornite
, and enargite), in each case, the reactions produce cupric copper ([Cu.sup.+]2) in solution which always has greater [delta][sup.65]Cu [per thousand] than the starting mineral.
The ore assemblage consists mainly of galena, sphalerite, siderite, chalcopyrite, pyrite, bornite
, and quartz.
In this area observed copper mineralization as hypogenous (chalcopyrite and bornite
) and supergene (malachite and azurite).
For example, aluminum is made from the mineral bauxite, and copper is extracted from bornite
Mineralization consists of megascopic and microscopic molybdenite, pyrite, minor chalcopyrite and rare bornite
Some of these displayed spectacular bornite
rims and contained minor amounts of galena as well as betekhtinite and other copper sulfides.
Antimony-like behaviour showed Kupferglas (Chalcocite, [Cu.sub.2]S), Buntkupfererz (Bornite
, [Cu.sub.5]Fe[S.sub.4]) and blattriger Magnetkies (Pyrrhotite, [Fe.sub.1-x]S).
The deposits tend to be characterised by a strong correlation between the distribution of copper sulphides (chalcopyrite and bornite
) and gold as the native metal in addition to having a notably higher magnetite content.
Proterozoic basalts and some sedimentary members of the Richmond Gulf Group (Chandler 1988) located around Guillaume-Delisle Lake in the southwestern part of the region host redbed-type deposits containing chalcocite and bornite
(Labbe and Lacoste 2004).
ABROWN, or Bornite
as it's known in the trade, isn't the most flattering hue for a Benz and the manual gearbox doesn't help either.
In reality, there are more types of concentrate (low bismuth, high bismuth and bornite
copper) but these are not separated by water.
THE SIGNIFICANCE OF CARROLLITE REPLACEMENT TEXTURES IN BORNITE
PODS AT THE SWEET WATER MINE, VIBURNUM TREND, SOUTHEAST MISSOURI.
Both contain chalcopyrite, bornite
and pyrite, as well as intense networks of magnetite and/or hematite with or without quartz veins and veinlets.