DOI: 10.1007/s11069-020-04428-4
论文题名: Analysis of neotectonic structures in the piedmont region of Pir Panjal Range NW Himalaya by integrating geomorphic indicators coupled with geophysical transects (GPR)
作者: Bali B.S. ; Wani A.A.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 105, 期: 3 起始页码: 2869
结束页码: 2882
语种: 英语
中文关键词: Ground penetration radar (GPR)
; Karewa deposits
; Kashmir Valley
; Neotectonics
; RTA
; Seismic hazard assessment
英文关键词: active fault
; earthquake mechanism
; extensional tectonics
; geomorphological response
; ground penetrating radar
; hazard assessment
; integrated approach
; landform evolution
; lithology
; neotectonics
; seismic hazard
; tectonic setting
; India
; Jammu and Kashmir
; Kashmir Valley
; Pir Panjal Range
英文摘要: Ground-penetrating radar (GPR) survey was performed at ten potential sites to delineate the blind surface ruptures, structural discontinuities/shallow subsurface active faults and palaeoseismic deformation in the dynamic range front environment of Pir Panjal. A total of 20 GPR profiles were recorded in four districts with the unshielded 100 MHz rough terrain antenna system and 250 MHz shielded antenna, and out of them, 10 profiles were processed and correlated with detailed structural and lithological map of the area. Several tectonic landforms such as strath surfaces, uplifted fluvial terraces, fault scarps, structural discontinuities, offset ridges, meanders, linear valleys and liquefaction structures mapped during field exercises were meticulously examined by GPR prospecting. Steeply dipping hyperbolas, warped and inclined radar reflections that sharply cut or offset stratigraphic reflections correspond to thrust fault strands. The processed data unearth normal and reverse faults, as well as liquefaction structures covered by recent deposits. However, their correlation with geological and structural data gave a more precise insight into the structural settings of the studied area. The different discontinuity relations specified in the Karewa deposits are mainly due to the regional compressional stress regimes and gradual anisotropic lithology prevailing in the area. The GPR data in agreement with the exposed geological units and structural models suggest that bulk of the landscapes have been evolved/sculptured under the influence of compressional and extensional tectonics along the concomitant active faults. The structural discontinuities (Faults) and the mechanical properties of Karewa deposits will be useful to infer the neotectonic activity prevailing in the area. The whole study would be helpful for the seismic hazard assessment of parts of the Kashmir Valley, NW Himalaya. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168897
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Sciences, University of Kashmir, Srinagar, India
Recommended Citation:
Bali B.S.,Wani A.A.. Analysis of neotectonic structures in the piedmont region of Pir Panjal Range NW Himalaya by integrating geomorphic indicators coupled with geophysical transects (GPR)[J]. Natural Hazards,2021-01-01,105(3)