Mykert-Sanzheevka Field of Polycomponent Ores (Pb, Zn, Ag, Au, PGE): Geologic-Substance Characteristics and Formation Features of Ore-Forming System

• 作者: Alexander Vasilyevich Tatarinov Anatoly Georgievich Mironov Lyubov Ilyinichna Yalovik Victor Fedorovich Posokhov
• 来源期刊: 地质材料(英文)
• 学科: 地球科学
• 关键词: Polycomponent ORES Dynamometamorphism Mechanometasomatites NOBLE Metals MICROAGGREGATES Nanophases Trace Minerals ORE-FORMING SYSTEM CARBONYL Compounds Geochemical Microanomalies
• 年，卷（期）: dzclyw_2020,（1）
• 页码范围: 1-23
• 页数: 23页
• 分类号: P61

摘要

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.