TY - JOUR

T1 - Multistage thrust and nappe tectonics in the southeastern part of east sayan and its role in the formation of large gold deposits

AU - Gordienko, I. V.

AU - Dobretsov, N. L.

AU - Zhmodik, S. M.

AU - Roshchektaev, P. A.

N1 - The research was carried out within the framework of state tasks of the Geological Institute (Ulan-Ude), Trofimuk Institute of Petroleum Geology and Geophysics, and V.S. Sobolev Institute of Geology and Mineralogy with funding from the Ministry of Science and Higher Education of the Russian Federation. Funding Information: The research was carried out within the framework of state tasks of the Geological Institute (Ulan-Ude), Trofimuk Institute of Petroleum Geology and Geophysics, and V.S. Sobolev Institute of Geology and Mineralogy with funding from the Ministry of Science and Higher Education of the Russian Federation. Publisher Copyright: © 2021, V.S. Sobolev IGM, Siberian Branch of the RAS.

PY - 2021

Y1 - 2021

N2 - Comprehensive studies of structural geology and metallogeny, taking into account the authors’ previous works started as early as the last century, have shown that the southeastern part of East Sayan formed mainly in the Neoproterozoic–early Paleozoic in the settings of multistage thrust and nappe tectonics and tectonomagmatic restructuring of autochthonous and overthrust allochthonous oceanic (ophiolitic), island arc, and ocean-marginal terranes as well as amalgamation of accretion–collision and postcollisional igneous complexes that formed during the opening and subsequent closure of the Paleoasian Ocean marginal structures. In the middle and late Paleozoic, active intraplate volcanic and plutonic processes continued in the thrust/overthrust fault setting, which led to the formation of new dome-shaped nappe structures and the redistribution of ore matter (gold etc.) in large mineral deposits. The final structure of the East Sayan region formed during the late Cenozoic as a result of mountain uplifting and volcanic eruptions, including those in the valley of the Zhombolok River.

AB - Comprehensive studies of structural geology and metallogeny, taking into account the authors’ previous works started as early as the last century, have shown that the southeastern part of East Sayan formed mainly in the Neoproterozoic–early Paleozoic in the settings of multistage thrust and nappe tectonics and tectonomagmatic restructuring of autochthonous and overthrust allochthonous oceanic (ophiolitic), island arc, and ocean-marginal terranes as well as amalgamation of accretion–collision and postcollisional igneous complexes that formed during the opening and subsequent closure of the Paleoasian Ocean marginal structures. In the middle and late Paleozoic, active intraplate volcanic and plutonic processes continued in the thrust/overthrust fault setting, which led to the formation of new dome-shaped nappe structures and the redistribution of ore matter (gold etc.) in large mineral deposits. The final structure of the East Sayan region formed during the late Cenozoic as a result of mountain uplifting and volcanic eruptions, including those in the valley of the Zhombolok River.

KW - Allochthonous terranes

KW - Collision zones

KW - East Sayan

KW - Genesis of gold deposits

KW - Geodynamics

KW - Intraplate magmatism

KW - Island arcs

KW - Marginal sea

KW - Ophiolites

KW - Thrust and nappe tectonics

UR - http://www.scopus.com/inward/record.url?scp=85106055451&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=46069092

U2 - 10.2113/RGG20204283

DO - 10.2113/RGG20204283

M3 - Article

AN - SCOPUS:85106055451

VL - 62

SP - 109

EP - 120

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 1

M1 - 7

ER -