气候变化领域集成服务门户(CCPortal): Structural Complexity and Mechanics of a Shallow Crustal Seismogenic Source (Vado di Corno Fault Zone, Italy)

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DOI	10.1029/2019JB018926
	Structural Complexity and Mechanics of a Shallow Crustal Seismogenic Source (Vado di Corno Fault Zone, Italy)
	Fondriest M.; Balsamo F.; Bistacchi A.; Clemenzi L.; Demurtas M.; Storti F.; Di Toro G.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	The mechanics and seismogenic behavior of fault zones are strongly influenced by their internal structure. In this perspective, the internal structure of the extensional seismically active Vado di Corno Fault Zone (VCFZ, Central Apennines, Italy) was quantified by combining high-resolution structural mapping with 3-D fault network analysis over ∼2 km along fault strike. The fault zone was exhumed from ∼2 km depth in carbonate rocks, accommodated 1.5–2 km of extensional throw since Early Pleistocene, and cuts through the Pliocene Omo Morto Thrust Zone (OMTZ) with partial reactivation in extension. The exceptional exposure of the footwall block allowed us to reconstruct in detail the geometry of the OMTZ and quantify the spatial arrangement of master/subsidiary faults and fault zone rocks within the extensional VCFZ. The combination of the structural map and the 3-D fault network with kinematic and topological analyses pointed out the crucial role of the older thrust geometry (i.e., lateral ramps) in controlling the along-strike segmentation and slip distribution of the VCFZ. These observations were discussed in the framework of regional extension through a slip tendency analysis and a simplified mechanical model, which suggest the activation of oblique inherited structures during the lateral propagation of the VCFZ segments. The interaction of the VCFZ with the OMTZ generated along strike and possibly downdip mechanical asperities. Considering the exhumed VCFZ as an analog for the shallow structure of other seismic sources in the Central Apennines, similar settings could play first-order control on the spatio-temporal evolution and rupture heterogeneity of earthquakes in the region. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	3-D structural model; carbonate bearing faults; high-resolution mapping; seismogenic extensional fault zone; structural inheritance
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187635
作者单位	Institut des Sciences de la Terre (ISTerre), Universitè Grenoble Alpes, Grenoble, France; Dipartimento di Geoscienze, Università degli Studi di Padova, Padua, Italy; Department of Earth and Environmental Sciences (DEES), University of Manchester, Manchester, United Kingdom; NEXT, Università degli Studi di Parma, Parma, Italy; Università degli Studi di Milano-Bicocca, Milan, Italy; The Njord Centre, University of Oslo, Oslo, Norway; Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy
推荐引用方式 GB/T 7714	Fondriest M.,Balsamo F.,Bistacchi A.,et al. Structural Complexity and Mechanics of a Shallow Crustal Seismogenic Source (Vado di Corno Fault Zone, Italy)[J],2020,125(9).
APA	Fondriest M..,Balsamo F..,Bistacchi A..,Clemenzi L..,Demurtas M..,...&Di Toro G..(2020).Structural Complexity and Mechanics of a Shallow Crustal Seismogenic Source (Vado di Corno Fault Zone, Italy).Journal of Geophysical Research: Solid Earth,125(9).
MLA	Fondriest M.,et al."Structural Complexity and Mechanics of a Shallow Crustal Seismogenic Source (Vado di Corno Fault Zone, Italy)".Journal of Geophysical Research: Solid Earth 125.9(2020).