DOI: 10.1002/2016GL068604
论文题名: Creep and locking of a low-angle normal fault: Insights from the Altotiberina fault in the Northern Apennines (Italy)
作者: Anderlini L. ; Serpelloni E. ; Belardinelli M.E.
刊名: Geophysical Research Letters
ISSN: 0094-9051
EISSN: 1944-8782
出版年: 2016
卷: 43, 期: 9 起始页码: 4321
结束页码: 4329
语种: 英语
英文关键词: coupling
; creeping
; Global Positioning System
; low-angle normal faults
; plate kinematics
; seismic potential
Scopus关键词: Couplings
; Creep
; Earthquakes
; Faulting
; Geophysics
; Global positioning system
; Kinematics
; Locks (fasteners)
; Seismology
; Creeping
; GPS velocities
; Normal faults
; Northern Apennines
; Plate kinematics
; Positive stress
; Probability of occurrence
; Seismic potential
; Fault slips
英文摘要: While low-angle normal faults have been recognized worldwide from geological studies, whether these structures are active or capable of generating big earthquakes is still debated. We provide new constraints on the role and modes of the Altotiberina fault (ATF) in accommodating extension in the Northern Apennines. We model GPS velocities to study block kinematics, faults slip rates and interseismic coupling of the ATF, which is active and accounts, with its antithetic fault, for a large part of the observed chain normal 3 mm/yr tectonic extension. A wide portion of the ATF creeps at the long-term slip rate (1.7 ± 0.3 mm/yr), but the shallow locked portions are compatible with M > 6.5 earthquakes. We suggest that positive stress accumulation due to ATF creep is most likely released by more favorable oriented splay faults, whose rupture may propagate downdip along low-angle normal fault surface and reduce the probability of occurrence of a seismic rupture of the shallower locked portion. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966454964&doi=10.1002%2f2016GL068604&partnerID=40&md5=0d1b5a004e4a10a8dacf493f68eb454c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10014
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: Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti, Bologna, Italy
Recommended Citation:
Anderlini L.,Serpelloni E.,Belardinelli M.E.. Creep and locking of a low-angle normal fault: Insights from the Altotiberina fault in the Northern Apennines (Italy)[J]. Geophysical Research Letters,2016-01-01,43(9).