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Formula: Cu6Cu6(As2Te2)S13
Sulpharsenite,
goldfieldite subgroup,
tetrahedrite group
Crystal System: Isometric
Environments
Arsenogoldfieldite is a new mineral, approved in 2022 and currently (September 2023) pending publication.
Localities
At the Gaching occurrence, Maletoyvayam ore field, Kamchatka Krai, Russia,
tolstykhite is a mineral new in 2022. It occurs as individual anhedral
grains up to 0.05 mm or as intergrowths with native selenium,
native tellurium and
tripuhyite. Other associated minerals include
calaverite, fischesserite,
stibiogoldfieldite,
arsenogoldfieldite,
tennantite-(Cu),
tetrahedrite-(Zn), galena,
gold, maletoyvayamite,
famatinite–luzonite series
minerals, pyrite, baryte,
ilmenite, magnetite,
quartz and vanadium-bearing
rutile
(MM 87.1.34–39).
At the type locality, the North Star Mine, Mammoth, Tintic Mining District, Juab County, Utah, USA, the mine
exploited a polymetallic
gold-silver-copper-lead
vein deposit emplaced in contact-metamorphosed dolomite, and it was the
largest producer of gold in the Tintic district. The principal ore minerals were
galena, cerussite and
enargite, and the prominent gangue
minerals were quartz and baryte
(CM 58.4.533-542).
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