Transbaikalia西部的断层和应力模式

IF 2.1 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
A.V. Cheremnykh, I.K. Dekabryov
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引用次数: 0

摘要

重建了Transbaikalia西部(贝加尔湖东南部)大型断层带和相应断层边界块体的应力模式。重建是基于对结构测量的分析,结合切片侧数据和地震机制。几种应力反演方法的组合提供了高质量的结果。根据地壳应力在空间和时间上不均匀分布的层次,分析了推断的局部应力张量的多样性。局部、次区域和区域层面的构造应力场是主应力大小变化及其在断层带演化过程中各自转换的结果。据报道,不同年龄岩石的区域古应力重建不仅证实了西外白加里亚中新生代历史上的事件序列,而且还揭示了蒙古-鄂霍次克洋封闭后存在的走滑应力机制。局部应力张量的不均匀模式表明该地区不存在单一的地壳应力场。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The fault and stress patterns of Western Transbaikalia

Stress patterns are reconstructed for large fault zones and the respective fault-bounded blocks in Western Transbaikalia (southeast of Lake Baikal). The reconstruction is based on analysis of structural measurements combined with slickenside data and earthquake mechanisms. The combination of several methods for stress inversion provides high quality of the results. The inferred diversity of local stress tensors is analyzed in terms of the hierarchy of crustal stresses unevenly distributed in space and time. The tectonic stress fields at the local, subregional, and regional levels result from changes in the magnitude of principal stresses and their respective switch during the evolution of fault zones. The reported regional paleostress reconstructions for rocks of different ages not only have confirmed the sequence of events in the Mesozoic-Cenozoic history of Western Transbaikalia but revealed additionally the previously unknown stress regime of strike-slip which existed there after the closure of the Mongolia-Okhotsk ocean. The heterogeneous patterns of local stress tensors indicate the absence of a single crustal stress field in the region.

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来源期刊
Journal of Geodynamics
Journal of Geodynamics 地学-地球化学与地球物理
CiteScore
4.60
自引率
0.00%
发文量
21
审稿时长
6-12 weeks
期刊介绍: The Journal of Geodynamics is an international and interdisciplinary forum for the publication of results and discussions of solid earth research in geodetic, geophysical, geological and geochemical geodynamics, with special emphasis on the large scale processes involved.
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