DEEP STRUCTURE OF THE ALTAI MOUNTAINS AND MODERN GRAVITY FIELD MODELS-Reference-Cited by-同舟云学术

DEEP STRUCTURE OF THE ALTAI MOUNTAINS AND MODERN GRAVITY FIELD MODELS

Published:2023-02-16 Issue:1 Volume:14 Page:
ISSN:2078-502X
Container-title:Geodynamics & Tectonophysics
language:
Short-container-title:Geodin. tektonofiz.

Author:

Timofeev V. Yu.¹,Ardyukov D. G.¹,Goldobin D. N.²,Timofeev A. V.¹,Nosov D. A.³,Sizikov I. S.³,Kalish E. N.⁴,Stus Yu. F.⁴

Affiliation:

1. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences

2. Siberian State University Geosystems and Technology

3. Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences; Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences

4. Institute of Automation and Electrometry of the Siberian Branch of the Russian Academy of Sciences

Abstract

The results of the ground-based absolute gravity and space geodetic measurements for the Altai Mountains were considered in combination with EIGEN-6C4 Global Geopotential Model (ETOPO1 Global Relief Model) generated from the satellite data. Analysis was made on different kinds of data: model values for the vertical component of gravity, values of Bouguer and Faye gravity reductions, variations of the vertical gravity gradient, and changes in altitude of the measurement sites. With EIGEN-6C4 model for Bouguer reduction, the crustal thickness curve was drawn along the Novosibirsk (southern West Siberia) – Ukok Plateau (Altai Mountains) line with a length of 800 km. The Moho depth increases from 40 km in the northwest of the area to 51 km in the southeast. For the homogeneous crust model, there was obtained the Moho depth distribution in the Altai Mountains and their foothills.The analysis of the results of modeling Bouguer and Faye reductions, the data on quasigeoid heights and the relationship between relief height and Bouguer anomalies implies that the Altai Mountains area as a whole is isostatically compensated. Non-compensated are some intermountain basins, such as, for example, the Kurai and Chuya valleys.

Publisher

Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences

Subject

Earth-Surface Processes,Geophysics,Geology,Economic Geology

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