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

作　　者：Bikramaditya Mondal Mery Biswas Soumyajit Mukherjee Mohamedharoon A.Shaikh 

机构地区：[1]Department of Earth Sciences,Indian Institute of Technology Bombay,Mumbai 400076,Maharashtra,India [2]Department of Geography,Presidency University,Kolkata 700073,West Bengal,India

出　　处：《Geodesy and Geodynamics》2024年第1期82-99,共18页大地测量与地球动力学（英文版）

基　　金：Research Development Fund(IIT Bombay)supported SM。

摘　　要：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 R^(2)values of the linear curve fit for watershed 7 indicate its master stream is much more tectonically active than the others.The R^(2)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.

关 键 词：Active tectonics GEOMORPHOLOGY Western Saurashtra ARCHEOLOGY North kathiawar fault system 

分 类 号：P548[天文地球—构造地质学] P931[天文地球—地质学]