DOI: 10.1002/2016GL071201
论文题名: Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography
作者: Pilia S. ; Arroucau P. ; Rawlinson N. ; Reading A.M. ; Cayley R.A.
刊名: Geophysical Research Letters
ISSN: 0094-8329
EISSN: 1944-8060
出版年: 2016
卷: 43, 期: 23 起始页码: 12082
结束页码: 12090
语种: 英语
英文关键词: ambient noise tomography
; continental accretion
; crustal azimuthal anisotropy
; East Gondwana
; Tasmanides
Scopus关键词: Anisotropy
; Deformation
; Geochronology
; Kinematics
; Seismology
; Tectonics
; Tomography
; Ambient noise tomographies
; Azimuthal anisotropy
; Continental accretion
; East Gondwana
; Tasmanides
; Geodynamics
英文摘要: The mechanisms of continental growth are a crucial part of plate tectonic theory, yet a clear understanding of the processes involved remains elusive. Here we determine seismic Rayleigh wave phase anisotropy variations in the crust beneath the southern Tasmanides of Australia, a Paleozoic accretionary margin. Our results reveal a complex, thick-skinned pervasive deformation that was driven by the tectonic interaction between the proto-Pacific Ocean and the ancient eastern margin of Gondwana. Stress-induced effects triggered by the collision and entrainment of a microcontinent into the active subduction zone are evident in the anisotropy signature. The paleofracturing trend of failed rifting between Australia and Antarctica is also recorded in the anisotropy pattern as well as a tightly curved feature in central Tasmania. The observed patterns of anisotropy correlate well with recent geodynamic and kinematic models of the Tasmanides and provide a platform from which the spatial extent of deformational domains can be refined. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007396776&doi=10.1002%2f2016GL071201&partnerID=40&md5=54ba0c21fd32faf8d5c49493b05ca10c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9292
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Petroleum Geosciences, Petroleum Institute, Abu Dhabi, United Arab Emirates
Recommended Citation:
Pilia S.,Arroucau P.,Rawlinson N.,et al. Inherited crustal deformation along the East Gondwana margin revealed by seismic anisotropy tomography[J]. Geophysical Research Letters,2016-01-01,43(23).