TITLE:
Mykert-Sanzheevka Field of Polycomponent Ores (Pb, Zn, Ag, Au, PGE): Geologic-Substance Characteristics and Formation Features of Ore-Forming System
AUTHORS:
Alexander Vasilyevich Tatarinov, Lyubov Ilyinichna Yalovik, Anatoly Georgievich Mironov, Victor Fedorovich Posokhov
KEYWORDS:
Polycomponent Ores, Dynamometamorphism, Mechanometasomatites, Noble Metals, Microaggregates, Nanophases, Trace Minerals, Ore-Forming System, Carbonyl Compounds, Geochemical Microanomalies
JOURNAL NAME:
Geomaterials,
Vol.10 No.1,
January
31,
2020
ABSTRACT: The new results of geologic-structural, petrographic and mineralogic-geochemical researches of Mykert-Sanzheevka ore field—the Uda-Vitim mineragenic zone South-West ending of West Transbaikalia are given. Its main ore-controlling structure, represented by losange, consisting of rhombohedral and tetrahedral blocks-duplexes mosaic clusters, which are separated by narrow tectonic sutures, is specified. It is clarified that polycomponent ores clusters are confined with these small-block sutures, made by subvolcanic dykes of shoshonite-latite volcano-plutonic association (233 - 188 million years), apodyke dynamometamorphites (breccias, cataclasite, mylonites) and also mechanometasomatites. Four stages of the dynamometamorphites formation characterized by different species compositions of ore minerals appeared as a result of mechanochemical reactions are determined. A carbonyl model of mineral microaggregates formation with films containing noble metal nanoparticles is proposed. Ore-forming system features of Mykert-Sanzheevka field are considered.