DOI: 10.1002/grl.51005
论文题名: A midcrustal ramp-fault structure beneath the Taiwan tectonic wedge illuminated by the 2013 Nantou earthquake series
作者: Chuang R.Y. ; Johnson K.M. ; Wu Y.-M. ; Ching K.-E. ; Kuo L.-C.
刊名: Geophysical Research Letters
ISSN: 0094-8507
EISSN: 1944-8238
出版年: 2013
卷: 40, 期: 19 起始页码: 5080
结束页码: 5084
语种: 英语
英文关键词: 2013 Nantou earthquake
; detachment
; Taiwan
; western foothills
Scopus关键词: ChiChi earthquake
; Coseismic slip distribution
; detachment
; Detachment surfaces
; Earthquake series
; Mountain building
; Taiwan
; western foothills
; Earthquakes
; Faulting
; aftershock
; Chi-Chi earthquake 1999
; coseismic process
; detachment fault
; earthquake event
; fault plane
; lower crust
; orogeny
; reverse fault
; slip
; tectonic wedge
; Nantou
; Taiwan
英文摘要: Taiwan's active mountain belt is a spotlight for orogenic studies and was first used to test the critical-taper wedge mechanics. The concept of an orogenic wedge above a shallow detachment surface has been highly influential on current understanding of orogenic processes in Taiwan. However, the recent ML 6.2 and ML 6.5 2013 Nantou reverse-faulting earthquakes in central Taiwan have nucleated below the proposed detachment, indicating that active mountain building is occurring below the orogenic wedge. We estimate the coseismic slip distributions and fault geometry using the uniform stress drop slip inversions. The earthquakes occur on essentially the same 30° dipping fault plane ramping up from ∼20 km depth near a cluster of 1999 Chi-Chi earthquake aftershocks to the shallow detachment and the Chi-Chi fault plane. The fault could be a deep extension of a mature shallow fault or a newly developed deep ramp fault that is not reflected in the surface geology. Key Points Recent Taiwan earthquakes illuminates thrust below tectonic wedge Slip inversion show rupture at 5 to 19 km depths on the deep thrust The fault links lower-crust activity to shallow detachment and ramps ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884998195&doi=10.1002%2fgrl.51005&partnerID=40&md5=bf4d5a793e7a9e3129d0c719062a8e2a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5771
Appears in Collections: 气候减缓与适应
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作者单位: Department of Geological Sciences, Indiana University, 1001 East 10th St., Bloomington, IN 47405, United States
Recommended Citation:
Chuang R.Y.,Johnson K.M.,Wu Y.-M.,et al. A midcrustal ramp-fault structure beneath the Taiwan tectonic wedge illuminated by the 2013 Nantou earthquake series[J]. Geophysical Research Letters,2013-01-01,40(19).