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Formula: Cu6Cu6(Sb2Te2)S13
Sulphosalt, goldfieldite subgroup,
tetrahedrite group,
antimony and tellurium
bearing mineral
Crystal System: Isometric
Colour: Grey
Environments
Volcanic igneous environments
Hydrothermal environments
Stibiogoldfieldite is a new mineral, approved in 2020.
Localities
At the Pefka mine, Pefka, Alexandroupoli, Evros, Eastern Macedonia and Thrace, Greece, stibiogoldfieldite
was reported in 2022. The deposit is an epithermal high-sulphidation type
gold mineralisation hosted in felsic volcanic rocks such as
dacite and
rhyodacite. The mineralisation is hosted by
andesitic lavas and is unusually enriched in
indium, tellurium,
selenium and copper
(Mindat).
At the type locality, the Mohawk Mine, Goldfield, Goldfield Mining District, Esmeralda County, Nevada, USA,
stibiogoldfieldite occurs as metallic anhedral grains, dark grey in colour. It is associated with
quartz, pyrite and a
silver-bismuth-(sulphur, selenium)
phase (holotype material) and with quartz,
pyrite, calaverite,
bismuthinite,
bohdanowiczite, and the
silver-bismuth-(sulphur, selenium)
phase (cotype material).
The Goldfield mining district belongs to a series of large epithermal precious metal ore deposits hosted in
hydrothermally altered volcanic rocks
(MM 86.1.168-175).
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