Conditions of the formation of gold-enriched horizons of ore-hosting black shale sequences (illustrated by Permian and recent marine sediments of Northeastern Asia)     

A. S. Astakhov  N. A. Goryachev  T. I. Mikhalitsyna 《Doklady Earth Sciences》2010,430(1):9-14

The problems of the origin of Au-rich horizons, which host all significant gold-ore deposits of the region, including valuable objects on a global level (Natalka and Nezhdaninskoe deposits), are considered, exemplified by Permian black shale deposits of the Ayan-Yuryakh anticlinorium of the Yana-Kolyma foldbelt and recent bottom sediments of the Chukchi Sea continental shelf.  相似文献   

The first discovery of platinum group minerals in black shale gold ores of the Degdekan deposit, Northeast Russia     

N. A. Goryachev  O. T. Sotskaya  E. M. Goryacheva  T. I. Mikhalitsyna  A. P. Man’shin 《Doklady Earth Sciences》2011,439(1):902-905

The results of investigation of heavy fraction minerals from the Degdekan deposit hosted by the lower portion of stratified Mid Permian sediments are presented; the investigation was conducted via electron microscopy using a QEMSCAN hardware and software instrument equipped with a QUANTAX quantitative analysis system. The following mineral phases of platinoids have been detected for the first time: native osmium, rutheniridosmine, osmiridium, ruthenosmiridium, laurite, iridarsenite, and Ru, Os, and Ir arsenide.  相似文献   

Petrophysical zoning of the Natalka ore field     

V. M. Sharafutdinov  I. M. Khasanov  T. I. Mikhalitsyna 《Russian Journal of Pacific Geology》2008,2(5):441-453

The petrophysical properties of 1168 rock and ore samples collected across the sections of the Natalka ore field have been determined. 235 of them were prepared as thin and polished sections and studied by geological-mineralogical methods. The general two-level petrophysical zoning of the ore field was established and substantiated. Its relations with ore areas, the interzonal space, altered wall rocks, and the mineral composition were determined. Both levels of the revealed petrophysical zoning are traced in the ore field over 4 km along the strike and 800 m down the dip. The subvertical conductivity zone (confined to the Omchak ore cluster) has spatial-genetic relations with the petrophysical changes, which reflect the established mineralogical composition and structure of the metasomatites and ores.  相似文献   

Ore Mineralization in Pleistocene Sediments of Long Strait (East Siberian Sea)     

Goryachev  N. A.  Sotskaya  O. T.  Astakhov  A. S.  Xuefa  Shi  Mikhalitsyna  T. I.  Aksentov  K. I.  Berdnikov  N. V. 《Doklady Earth Sciences》2020,491(2):220-223

Doklady Earth Sciences - A mineralogical–geochemical study of Late Pleistocene bottom sediments of the LV 77-10 core collected in the central part of Long Strait was carried out. Two horizons...  相似文献