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Evaluation of DEM based Neotectonics of Sulaiman range and lobe region (SRLR), Balochistan-Pakistan
Earth Science Informatics ( IF 2.8 ) Pub Date : 2021-03-21 , DOI: 10.1007/s12145-021-00590-w
Jahanzeb Qureshi , Syed Amer Mahmood

The Indian plate’s western boundary is extremely tilted towards the direction of convergence between Asia and India signifying an exceptional example of massive scale oblique continent-continent collision. This transform boundary motion is sinistral in nature and Digital Elevation Model (DEM) based geomorphometry permits the investigation of 3-D characteristics of the regional topography. This technique is specifically useful along inter-plate transform margins where the visual interpretation and topographic assessment is unable to observe the trends of the landforms evolution. In this context, the geomorphometry of the regional surface might be influenced largely by climate change and lower rate of active deformation. The geomorphic indices; Isobase Levels (IBLs), Topographic Asymmetry factor (T-factor) and Hack Gradient Index (HGI) have been executed to analyze fluvial drainage networks in connection to neotectonic movements. The sinistral movement along the Chaman Fault system and relatively less deformed Katawaz Block are the major surface dynamics to compute the style of deformation in the Sulaiman Range and Lobe Region (SRLR). Within the SRLR, the Sulaiman Fold and Thrust Belt (SFTB) is thrusting with a rate of 4–15 mm/yr in a North-South (NS) trend between IndoPak-Eurasian and a shortening of 4–6 mm/yr in East-West (EW) context. Seismicity is typically towards NorthWest-SouthEast (NW-SE) accommodating the moment release in the current century between the IndoPak-Eurasian transform plate boundary in the western most of the western Himalayan Syntaxis. The results obtained from the applied geomorphic indices indicate significant uplift in terms of higher IBL and HGI values all along the SRLR (Harnai, Katwaz, Qilla Saifullah, Zhob, Loralai, Jissa Shareef, Sakhi Sarwar and Fort Munro). The T-factor results also display tilt block neotectonics that are in agreement with the results of IBL and HGI.



中文翻译:

Bal路支-巴基斯坦苏莱曼山脉和波瓣区域(SRLR)基于DEM的新构造学评价

印度板块的西边界极其偏向亚洲和印度之间的融合方向,这标志着大规模的倾斜大陆与大陆碰撞的一个杰出例子。这种变换边界运动本质上是左旋的,基于数字高程模型(DEM)的地貌法可以研究区域地形的3D特征。该技术在板间转换边距上特别有用,在该处,视觉解释和地形评估无法观察到地貌演变的趋势。在这种情况下,气候变化和较低的活动变形率可能会极大地影响区域表面的地貌。地貌指数;等基级(IBL),已经执行了地形不对称因子(T因子)和哈克梯度指数(HGI)来分析与新构造运动有关的河流排水网络。沿Chaman断层系统的左旋运动和相对较少变形的Katawaz块体是计算Sulaiman山脉和凸角区域(SRLR)的变形样式的主要表面动力学。在SRLR中,苏来曼褶皱和冲断带(SFTB)在IndoPak-Eurasian之间的北南(NS)趋势中以每年4-15 mm /年的速度推进,而在东部则缩短4-6 mm /年。 -西部(EW)上下文。地震通常朝向西北-东南(NW-SE),以适应本世纪喜马拉雅山脉西缘最西端的IndoPak-Eurasian转换板块边界之间的瞬时释放。从应用的地貌指数获得的结果表明,沿着整个SRLR(Harnai,Katwaz,Qilla Saifullah,Zhob,Loralai,Jissa Shareef,Sakhi Sarwar和Fort Munro),IBL和HGI值均显着升高。T因子结果还显示与IBL和HGI结果一致的倾斜块新构造。

更新日期:2021-03-21
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