Abstract
Mineralogical and geochemical investigations of the underexplored gold ore deposits within the Murunsky node, specifically the Seredinskoye and Andreevskoye ore fields, were conducted utilizing mineralogical and microprobe analytical techniques. The study identified several minerals, including bismuth minerals such as wittichenite and aikinite; cadmium mineral greenockite; cobalt minerals cobaltite and carrollite; arsenic minerals arsenosulvanite and tennantite; antimony minerals antimonite and tetrahedrite; tellurium minerals hessite and Te-canfieldite; mercury mineral cinnabar; thallium minerals raguinite and copper-rich talcusite; and tin minerals kesterite and jeanbandyite. Additionally, potassium sulfide djerfisherite with an unusual silver admixture was discovered. The findings underscore the remarkable and largely untapped potential of the Murunsky massif, particularly concerning its ore mineralization. A notable characteristic of the identified minerals is their non-stoichiometric composition, which includes the presence of impurities and isomorphic substitution of elements, attributed to the disequilibrium conditions under which they formed. The discoveries of raguinite and jeanbandyite represent the first occurrences of these minerals in Russia.
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