DOI: 10.1002/2016GL069359
论文题名: Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes
作者: Craig T.J. ; Calais E. ; Fleitout L. ; Bollinger L. ; Scotti O.
刊名: Geophysical Research Letters
ISSN: 0094-8946
EISSN: 1944-8677
出版年: 2016
卷: 43, 期: 13 起始页码: 6826
结束页码: 6836
语种: 英语
英文关键词: Fennoscandia
; intraplate earthquakes
; seismic hazard
; tectonic strain
Scopus关键词: Fault slips
; Faulting
; Geochronology
; Geophysics
; Lithology
; Seismology
; Strain rate
; Tectonics
; Compressional strain
; Continental lithosphere
; Fennoscandia
; Horizontal strain
; Intraplate earthquakes
; Large earthquakes
; Reverse faulting
; Seismic hazards
; Earthquakes
英文摘要: The occurrence of large earthquakes in stable continental interiors challenges the applicability of the classical steady state “seismic cycle” model to such regions. Here we shed new light onto this issue using as a case study the cluster of large reverse faulting earthquakes that occurred in Fennoscandia at 11–9 ka, triggered by the removal of the ice load during the final phase of regional deglaciation. We show that these reverse-faulting earthquakes occurred at a time when the horizontal strain rate field was extensional, which implies that these events did not release horizontal strain that was building up at the time but compressional strain that had been accumulated and stored elastically in the lithosphere over timescales similar to or longer than a glacial cycle. We argue that the tectonically stable continental lithosphere can store elastic strain on long timescales, the release of which may be triggered by rapid, local transient stress changes caused by surface mass redistribution, resulting in the occurrence of intermittent intraplate earthquakes. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978176771&doi=10.1002%2f2016GL069359&partnerID=40&md5=e43829a56820e188a13b69f22f6fb90b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9909
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: Ecole normale supérieure, Department of Geosciences, PSL Research University, Paris, France
Recommended Citation:
Craig T.J.,Calais E.,Fleitout L.,et al. Evidence for the release of long-term tectonic strain stored in continental interiors through intraplate earthquakes[J]. Geophysical Research Letters,2016-01-01,43(13).