DOI: 10.1007/s00531-013-0986-1
论文题名: Structure of pseudotachylyte vein systems as a key to co-seismic rupture dynamics: The case of Gavilgarh-Tan Shear Zone, central India
作者: Chattopadhyay A. ; Bhattacharjee D. ; Mukherjee S.
刊名: International Journal of Earth Sciences
出版年: 2014
卷: 103, 期: 3 起始页码: 953
结束页码: 965
语种: 英语
英文关键词: Co-seismic fracture pattern
; Gavilgarh-Tan Shear Zone
; Granitoids
; Pseudotachylyte
; Rupture directivity
; Seismic source parameters
Scopus关键词: coseismic process
; earthquake rupture
; fault zone
; granitoid
; pseudotachylite
; seismic moment
; seismic source
; shear zone
; strike-slip fault
; tectonic evolution
; vein (geology)
; India
英文摘要: The secondary fractures associated with a major pseudotachylyte-bearing fault vein in the sheared aplitic granitoid of the Proterozoic Gavilgarh-Tan Shear Zone in central India are mapped at the outcrop scale. The fracture maps help to identify at least three different types of co-seismic ruptures, e.g., X-X′, T1 and T2, which characterize sinistral-sense shearing of rocks, confined between two sinistral strike-slip faults slipping at seismic rate. From the asymmetric distribution of tensile fractures around the sinistral-sense fault vein, the direction of seismic rupture propagation is predicted to have occurred from west-southwest to east-northeast, during an ancient (Ordovician?) earthquake. Calculations of approximate co-seismic displacement on the faults and seismic moment (M 0) of the earthquake are attempted, following the methods proposed by earlier workers. These estimates broadly agree to the findings from other studied fault zones (e.g., Gole Larghe Fault zone, Italian Alps). This study supports the proposition by some researchers that important seismological information can be extracted from tectonic pseudotachylytes of all ages, provided they are not reworked by subsequent tectonic activity. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896547939&doi=10.1007%2fs00531-013-0986-1&partnerID=40&md5=94049905bfe3bee61c8859972d2eb39e
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70374
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geology, University of Delhi, Delhi, 110007, India
Recommended Citation:
Chattopadhyay A.,Bhattacharjee D.,Mukherjee S.. Structure of pseudotachylyte vein systems as a key to co-seismic rupture dynamics: The case of Gavilgarh-Tan Shear Zone, central India[J]. International Journal of Earth Sciences,2014-01-01,103(3)