Selective leaching of antimony and arsenic from mechanically activated tetrahedrite
, jamesonite and enargite.
From a mineral consisting primarily of tetrahedrite
, the ore has changed to one containing tetrahedrite
with varying levels of pyrite, galena, and bournonite, Modifying the flotation process while incorporating flexibility to deal with this variability was accomplished without loss of production.
9 metres wide with mineralized lenses of galena, tetrahedrite
and sphalerite that assays up to 1,885.
, chalcopyrite, pyrite and galena are dominant ore minerals with subordinate amounts of sphalerite, magnetite, malachite and azurite.
Therefore the book's chief appeal for collectors is in the slightly sad pleasure its photo gallery offers in showing us nice, aka "interesting," things now gone, or at least unavailable: specimens of Bingham Canyon apophyllite, okenite, copper, enargite, chalcopyrite, tetrahedrite
, and a few others, such as we almost surely have never seen.
The 20 vein is comprised of an assemblage of semi-massive irregular clusters of sulphide chalcopyrite, pyrrhotite, pyrite, and minor tetrahedrite
This provides a measure of the relative Ag content of tetrahedrite
and sulfosalts associated with galena.
Silver occurs in the galena, as electrum, and in tetrahedrite
, argentite, and pyrargyrite.
At the El Indio mill the 3,000 t/d of ore, part of which is also obtained from the Rio del Medio deposit located about 8 km to the north, is crushed and ground before passing to flotation, the principal economic minerals being enargite, pyrite (which carries gold), chalcopyrite, covellite, tennantite, and tetrahedrite
The mineralization is comprised of pyrite, sphalerite, silver rich galena, chalcopyrite, arsenopyrite, tennandite, tetrahedrite
, native gold, native silver and quartz.
Also from the Mundo Nuevo district there's tetrahedrite
with bournonite, in specimens from 3 to 12 cm across which are clusters of sharp tetrahedral crystals of tetrahedrite
completely coated by lustrous metallic black bournonite, the latter as microcrystal druses which roughen, but add interest to, the tetrahedrite
faces--a single flat of these specimens was with Jaroslav Hyrsl.
Common sulphide minerals are pyrite, sphalerite, galena and tetrahedrite