TITLE:
Reconstruction of the Indigenous Sources of Gold of the Glu-Kharinsky Placer (Kolyma River Basin, Magadan Region, Russia)
AUTHORS:
Natalya Evgenievna Savva, Aleksandr Aleksandrovich Biruykov, Anton Nikolaevich Gluhov
KEYWORDS:
Ore-Placer Node, Native Gold, Mineral Associations, Placer, Indigenous Sources
JOURNAL NAME:
Natural Resources,
Vol.13 No.12,
December
30,
2022
ABSTRACT: A comparative analysis
of typomorphic features of gold placers and indigenous sources of gold was
carried out for the Glukharinsky ore-placer node (the Nadezhda deposit and
Glukharinskoye, Tyomnoye, and Tyi-Jurye ore occurrences). A correlation between
fineness of placer native gold and composition of relic minerals preserved inside gold particles was obtained for the
first time. This made it possible to establish mineral parageneses of native
gold from potential indigenous sources. The study of placer gold
fineness in combination with com-position of
mineral inclusions allowed us to identify seven types of gold paragenesis:
petzite-hessite with a fineness of 855‰, pyrite-polybasite-galena (a fineness
of 670‰), bismuth telluride (900‰), cosalite-vikingite (790‰), galena
(870‰), glaucodot (950‰), and hydrohematite (840‰). It was also shown that the
placer contains the material from ore occurrences of different formation: gold-quartz-porphyry occurrences in
granitoids (Au-Te-Bi type) and gold-silver occurrences. The method
developed by us allows one to estimate the percentage of each ore source in
placer formation.