Abstract
The results of a spectral study of 242 native gold samples from ore materials of indigenous deposits and relics of placer deposits in the Yugler ore-placer field were analyzed using the Leader and PROFILE software. The mineralization in black shale of the Yugler ore-placer field is characterized by the lead and copper geochemical specialization of native gold. This assigns it to the style of gold mineralization at the Degdekan deposit, but distinguishes it from most similar deposits in Russia and worldwide. Native gold in ore bodies and placers displays a distinct geochemical specialization. Native gold from ore bodies is high in As, Bi, and Pb; gold from the Yugler Brook placer, in Cu, Pb, Fe, and Mn; and placers of the Spokoinyi and Matrosov brooks, in Sb and Ag. In general, the vertical zoning of mineralization includes low-grade antimonious segregations of native gold in eroded parts of the sequence and high-grade bismuth–lead–arsenious grains, in its preserved parts. The general mineral–geochemical model of the formation of the Yugler ore-placer field is a space–time exchange of copper–polymetallic mineral assemblages with arsenic–bismuth–polymetallic and then with silver–antimony–polymetallic assemblages. The antimonious mineral assemblages were the most abundant in the southwest of the ore field.
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Litvinenko, I.S. The Geochemical Patterns of Native Gold from the Yugler Ore–Placer Field (Northeast Russia). Russ. J. of Pac. Geol. 15 (Suppl 1), S12–S24 (2021). https://doi.org/10.1134/S1819714022010080
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DOI: https://doi.org/10.1134/S1819714022010080