DOI: 10.1007/s00531-016-1407-z
Scopus记录号: 2-s2.0-84992109801
论文题名: Crustal deformation rates in Assam Valley, Shillong Plateau, Eastern Himalaya, and Indo-Burmese region from 11 years (2002–2013) of GPS measurements
作者: Barman P. ; Jade S. ; Shrungeshwara T.S. ; Kumar A. ; Bhattacharyya S. ; Ray J.D. ; Jagannathan S. ; Jamir W.M.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2017
卷: 106, 期: 6 起始页码: 2025
结束页码: 2038
语种: 英语
英文关键词: Crustal deformation
; Deformation models
; Earthquakes
; Global Positioning System (GPS)
; GPS geodesy
; Plate convergence
Scopus关键词: crustal deformation
; deformation
; earthquake
; geodesy
; GPS
; plate convergence
; plateau
; Himalayas
; India
; Shillong Plateau
英文摘要:
The present study reports the contemporary deformation of the tectonically complex northeast India using 11 years (2002–2013) of GPS observations. The central Shillong Plateau and few sites north of Plateau located in Assam Valley behave like a rigid block with ~7 mm/year India-fixed southward velocity. The Euler pole of rotation of this central Shillong Plateau–Assam Valley (SH–AS) block is estimated to be at −25.1° ± 0.2°N, −97.8° ± 1.8°E with an angular velocity of 0.533° ± 0.10° Myr−1 relative to India-fixed reference frame. Kopili fault located between Shillong Plateau and Mikir massif records a dextral slip of 4.7 ± 1.3 mm/year with a locking depth of 10.2 ± 1.4 km indicating the fragmentation of Assam Valley across the fault. Presently, western edge of Mikir massif appears to be locked to Assam block indicating strain accumulation in this region. First-order elastic dislocation modelling of the GPS velocities estimates a slip rate of 16 mm/year along the Main Himalayan Thrust in Eastern Himalaya which is locked over a width of 130 km from the surface to a depth of 17 km with underthrusting Indian plate. Around ~9 mm/year arc-normal convergence is accommodated in Lesser Himalaya just south of Main Central Thrust indicating high strain accumulation. Out of 36 mm/year (SSE) India-Sunda plate motion, about ~16 mm/year motion is accommodated in Indo-Burmese Fold and Thrust Belt, both as normal convergence (~6 mm/year) and active slip (~7–11 mm/year) in this region. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992109801&doi=10.1007%2fs00531-016-1407-z&partnerID=40&md5=fa206e87cbca385d7c44a91f65c47741
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69999
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: CSIR-4PI, CSIR Fourth Paradigm Institute, (Formerly CSIR-CMMACS), Wind Tunnel Road, Bangalore, India; Tezpur University, Tezpur, Assam, India; Nagaland University, Lumami, Nagaland, India
Recommended Citation:
Barman P.,Jade S.,Shrungeshwara T.S.,et al. Crustal deformation rates in Assam Valley, Shillong Plateau, Eastern Himalaya, and Indo-Burmese region from 11 years (2002–2013) of GPS measurements[J]. International Journal of Earth Sciences,2017-01-01,106(6)