STRUCTURAL FEATURES OF THE DEEP STRUCTURE OF THE SOUTHEASTERN YANA-KOLYMA FOLD SYSTEM FROM COMPLEX GEOPHYSICAL DATA

Ore deposits of the Magadan region are now in the focus of comprehensive studies as information on their deep structure is needed for both subsoil prospecting and regional development planning. This article presents the research results for the southeastern flank of the Yana-Kolyma orogenic belt. Th...

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Bibliographic Details
Published in:Geodynamics & Tectonophysics
Main Authors: N. K. Gayday, N. A. Goryachev, I. M. Khasanov, E. Yu. Goshko, Н. К. Гайдай, Н. А. Горячев, И. М. Хасанов, Е. Ю. Гошко
Format: Article in Journal/Newspaper
Language:Russian
Published: Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch 2020
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Online Access:https://www.gt-crust.ru/jour/article/view/1119
https://doi.org/10.5800/GT-2020-11-4-0501
Description
Summary:Ore deposits of the Magadan region are now in the focus of comprehensive studies as information on their deep structure is needed for both subsoil prospecting and regional development planning. This article presents the research results for the southeastern flank of the Yana-Kolyma orogenic belt. This area located at the junction with the Okhotsk-Koryak orogenic belt was investigated using the northeastern segment of the regional geophysical profile 3-DV. We analyzed the frequency-energy sections of the crust along the profile, 3D crustal density model of the entire study area, and magnetic, geoelectric and gravimagnetic characteristics of the crust. Complex data interpretation allowed tracing the crustal fault zones, areas wherein the crust material was strongly reworked, and zones of quasi-horizontal stratification. Considering the revealed features of the physical parameters of the crust material, we conclude that the currently accepted boundaries of individual tectonic blocks in the study area need to be adjusted. The northern boundary of the Balygychan uplift should be mapped along the Pautov fault. The Srednekansky branch of the Inyali-Debinsky synclinorium should be considered a transitional block that belongs to the Sugoi synclinorium, and its name should be changed to the Orotukan block. В настоящее время в Магаданской области преимущественный интерес вызывают рудные месторождения. Информация о глубинном строении, недоступная прямым исследованиям, важна для планирования как региональных, так и поисковых работ. Это делает актуальным проведение комплексного изучения недр. Исследования выполнены для юго-восточного фланга Яно-Колымского орогенного пояса, в месте его сочленения с Охотско-Корякским орогенным поясом, в области расположения северо-восточного участка опорного геофизического профиля 3-ДВ. Использованы данные, полученные различными геофизическими методами: частотно-энергетические разрезы земной коры вдоль профиля 3-ДВ, трехмерная плотностная модель земной коры на всю исследуемую территорию, а ...