Prospecting in 2015 focussed on a highly siliceous gossanous andesite outcrop with azurite/malachite oxidation and possible tetrahedrite
The composition of this ore called "klastik ore" by authorized of Company was consisted of pyrite, chalcopyrite, galena, sphalerite, tetrahedrite
, markasite bornite [16, 17].
Selective leaching of arsenic and antimony from a tetrahedrite
rich complex sulphide concentrate using alkaline sulphide solution.
SandstrAlm, Dissolution kinetics of tetrahedrite
mineral in alkaline sulphide media, Hydrometallurgy, 103(2010), No.
Disseminated native gold, tetrahedrite
, telluride minerals, pyrite, arsenopyrite, and chalcopyrite are the primary metallic minerals in the veins.
Concerning mineralogy, the ore deposits contain mainly pyrite, although there are also sphalerite, tetrahedrite
, arsenopyrite and pyrrhotite.
Sulfide mineralization in the form of chalcopyrite, tetrahedrite
and pyrite is noticed along shear zones and in the vicinity of thick marbalized beds and silicified alteration zones within the Shamran / Teru volcanics.
, argentite, pyrrhotite and native gold occurred sporadically and sparingly.
Multi phase quartz veins that host chalcopyrite, bornite, tetrahedrite
, arsenopyrite and yield up to 31 g/t Au and 0.
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 ores developed occur in veins, as sulfides: blende, galena, pyrite, chalcocite, covelline ant tetrahedrite
, obtained amounted to: lead concentrates, 46,640 tonnes with 73 to 78% of lead; zinc concentrates, 75.
The deposit is contained within four closely-stacked lenses of massive sulphide mineralisation, characterised by chalcopyrite, sphalerite, banded pyrite, galena and minor tetrahedrite