Open AccessThe first find of silver nuggets in gold placers of Subpolar Urals
Author(s) -
T. P. Mayorova,
С. К. Кузнецов,
В. Н. Филиппов
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524866714-717
Subject(s) - wolframite , cassiterite , bismuth , galena , mineralogy , geology , metallurgy , materials science , geochemistry , quartz , sphalerite , tin , tungsten
For the first time, silver nuggets were found in the gold-bearing placers of the Subpolar Urals. Galena, cassiterite, wolframite, cosalite, tetradymite, ferberite, cobaltine, joseite-B, native bismuth associate with silver and gold. Silver is mainly represented by poorly rounded and non-round gray lumpy, slightly flattened, elongated particles of 2-2.5 cm size. As part of silver, Au and Hg sometimes contain impurities. Inclusions are represented by small particles of gold, bismuth and tellurium mineral phases. Research results indicate a fairly widespread development of Au-Ag-Bi-Te mineralization, the primary manifestations of which are not yet known in the region. Relatively weak roundness of silver nuggets, presence of major and poorly rounded gold indicates the proximity of the primary sources to gold-bearing placers.