Monhemius, The leaching of tetrahedrite
in ferric chloride solutions.
These peaks closely match with diffraction pattern of tetrahedrite
Most of the Carrara minerals are in the form of small crystals, which can be difficult for showgoers to fully appreciate; so in order to help show the beauty of the delicate crystals of wurtzite, sphalerite, colusite, sulvanite, rutile, quartz, tetrahedrite
and many other species, excellent photos by Roberto Appiani and Matteo Chinellato were shown in sequence on the large overhead screens above the exhibition area.
The deposit is contained within four closely-stacked lenses of massive sulphide mineralisation, characterised by chalcopyrite, sphalerite, banded pyrite, galena and minor tetrahedrite
. A strike length of about 700 m has been defined, and a down-dip extension of 450 m, with limited potential for extension beyond these limits.
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.
Historic mapping and sampling at the Bornite Trend identified scattered quartz-bornite-chalcocite-magnetite +/- chalcopyrite +/- tetrahedrite
veins and stringers over a strike length of 7.5 kilometres.
In the Keyue deposit, the ore minerals include sphalerite, galena, pyrite, arsenopyrite, chalcopyrite, tetrahedrite
, freibergite, boulangerite, jamesonite, bournonite, and stibnite; the gangue minerals are mainly Mn-Fe carbonate, quartz, and calcite (Figures 4-6); and the supergenesis generates the minerals that prevailingly include ferrohydrite, sardinianite, valentinite, malachite, and siliceous sinter (Figure 7).
The composition of this ore called "klastik ore" by authorized of Company was consisted of pyrite, chalcopyrite, galena, sphalerite, tetrahedrite
, markasite bornite [16, 17].
Disseminated native gold, tetrahedrite
, telluride minerals, pyrite, arsenopyrite, and chalcopyrite are the primary metallic minerals in the veins.
, chalcopyrite, pyrite and galena are dominant ore minerals with subordinate amounts of sphalerite, magnetite, malachite and azurite.