DOI: 10.1007/s00531-014-1016-7
论文题名: Partitioning of convergence in Northwest Sub-Himalaya: Estimation of late Quaternary uplift and convergence rates across the Kangra reentrant, North India
作者: Thakur V.C. ; Joshi M. ; Sahoo D. ; Suresh N. ; Jayangondapermal R. ; Singh A.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 4 起始页码: 1037
结束页码: 1056
语种: 英语
英文关键词: Active faults
; Out-of-sequence faulting
; Paleoseismology
; Sub-Himalaya zone
; Surface ruptures
Scopus关键词: active fault
; crustal shortening
; dip
; earthquake rupture
; foreland basin
; partitioning
; plate convergence
; seismology
; slip rate
; thrust fault
; uplift
; Garhwal Himalayas
; Himalayas
; India
; Uttarakhand
英文摘要: The Kangra reentrant constitutes a ~ 80-km-wide zone of fold-thrust belt made of Cenozoic strata of the foreland basin in NW Sub-Himalaya. Earlier workers estimated the total long-term shortening rate of 14 ± 2 mm/year by balanced cross-section between the Main Boundary Thrust and the Himalayan Frontal Thrust. Geologically estimated rate is nearly consistent with the GPS-derived slip rate of 14 ± 1 mm/year. There are active faults developed within 4-8 km depth of the Sub-Himalayan fold-thrust belt of the reentrant. Dating the strath surfaces of the abandoned fluvial terraces and fans above the thrust faults, the uplift (bedrock incision) rates are computed. The dips of thrust faults are measured in field and from available seismic (depth) profiles. From the acquired data, late Quaternary shortening rates on the Jawalamukhi Thrust (JT), the Soan Thrust (ST) and the Himalayan Frontal Thrust (HFT) are estimated. The shortening rates on the JT are 3.5-4.2 mm/year over a period 32-30 ka. The ST yields a shortening rate of 3.0 mm/year for 29 ka. The corresponding shortening and slip rates estimated on the HFT are 6.0 and 6.9 mm/year during a period 42 ka. On the back thrust of Janauri Anticline, the shortening and slip rates are 2.0 and 2.2 mm/year, respectively, for the same period. The results constrained the shortening to be distributed largely across a 50-km-wide zone between the JT and the HFT. The emergence of surface rupture of a great and mega earthquakes recorded on the reactivated HFT implies ≥100 km width of the rupture. The ruptures of large earthquakes, like the 1905 Kangra and 2005 Kashmir, remained restricted to the hinterland. The present study indicates that the high magnitude earthquakes can occur between the locking line and the active thrusts. © 2014 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900020284&doi=10.1007%2fs00531-014-1016-7&partnerID=40&md5=f44fe5f5d901ec019bdbda8b848c0ddb
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70427
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: Wadia Institute Himalayan Geology, 33 GMS Road, Dehradun, 248001, India
Recommended Citation:
Thakur V.C.,Joshi M.,Sahoo D.,et al. Partitioning of convergence in Northwest Sub-Himalaya: Estimation of late Quaternary uplift and convergence rates across the Kangra reentrant, North India[J]. International Journal of Earth Sciences,2014-01-01,103(4)