Geomorphic signatures and active tectonics in western Saurashtra, Gujarat, India

IF 2.8 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Geodesy and Geodynamics Pub Date : 2023-09-02 DOI:10.1016/j.geog.2023.08.001

Bikramaditya Mondal , Mery Biswas , Soumyajit Mukherjee , Mohamedharoon A. Shaikh

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引用次数: 0

Abstract

Active tectonics in an area includes ongoing or recent geologic events. This paper investigates the tectonic influence on the subsidence, uplift and tilt of western Saurashtra through morphotectonic analysis of ten watersheds along with characteristics of relief and drainage orientation. Watersheds 7–9 to the north (N) are tectonically active, which can be linked with the North Kathiawar Fault System (NKFS) and followed by watersheds 6, 10, 1, 4 and 5. Stream-length gradient index and sinuosity index indicate the effect of tectonic events along the master streams in watersheds 6–9. Higher R² values of the linear curve fit for watershed 7 indicate its master stream is much more tectonically active than the others. The R² curve fitting model and earthquake magnitude/depth analysis confirm the region to be active. The reactivation of the NKFS most likely led to the vertical movement of western Saurashtra.

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印度古吉拉特邦西部索拉斯特拉的地貌特征和活动构造

一个地区的活动构造包括正在发生或近期发生的地质事件。本文通过对十个分水岭的形态构造分析，结合地貌特征和排水方向，研究了构造对索拉施特拉西部沉降、隆升和倾斜的影响。北部（N）的 7-9 流域构造活跃，可与北卡蒂亚瓦断层系统（NKFS）联系起来，其次是 6、10、1、4 和 5 流域。溪流长度梯度指数和蜿蜒度指数表明，6-9 号流域的主溪流受到构造事件的影响。流域 7 的线性曲线拟合 R2 值较高，表明其主溪流的构造活动比其他溪流要活跃得多。R2 曲线拟合模型和地震震级/深度分析证实了该区域的活动性。NKFS 的重新激活很可能导致了西索拉施特拉的垂直运动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geodesy and Geodynamics GEOCHEMISTRY & GEOPHYSICS-

CiteScore

4.40

自引率

4.20%

发文量

566

审稿时长

69 days

期刊介绍： Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.