气候变化领域集成服务门户(CCPortal): Three dimensional Gravity Local Inversion Across the Area Struck by the 2016

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DOI	10.1029/2019JB018853
	Three dimensional Gravity Local Inversion Across the Area Struck by the 2016–2017 Seismic Events in Central Italy
	Mancinelli P.; Pauselli C.; Fournier D.; Fedi M.; Minelli G.; Barchi M.R.
发表日期	2020
ISSN	21699313
卷号	125 期号:2
英文摘要	In this work, the crustal volume struck by the 2016–2017 seismic sequence in Central and Northern Apennines is investigated using constrained 3-D inversion of the gravity anomalies. In order to focus on the area comprising the two mainshocks of the sequence, we perform a regional field removal on the data as a preprocessing step. This residual data set is then inverted into a 3-D density contrast model. We perform a series of inversions to test different geological scenarios and parameters, with increasing complexity in the reference geometries. We first test a model comprising turbidites, carbonates and evaporites, and basement and then introduce a low-density layer at the top of the basement. The geometries are obtained in agreement with the available geological and geophysical information in the area. We found that the density distribution with depth is compatible with previous models. Moreover, results support the hypothesis based on borehole evidence of a low-density upper basement across the entire area, possibly consisting of low-grade metamorphic rocks (phyllites). Finally, we compare our modeling results to the spatial distribution at depth of major seismic events between August and November 2016. These events appear to be concentrated within the denser units at both shallow and deep locations, while the deeper events often occur in a region of major density contrast corresponding to the top of the basement. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	3-D gravity inversion; Apennines; seismicity
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/187960
作者单位	Dipartimento di Ingegneria e Geologia, Università degli Studi “G. d'Annunzio” di Chieti-Pescara, Chieti, Italy; Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Perugia, Italy; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse, Università di Napoli Federico II, Naples, Italy
推荐引用方式 GB/T 7714	Mancinelli P.,Pauselli C.,Fournier D.,等. Three dimensional Gravity Local Inversion Across the Area Struck by the 2016–2017 Seismic Events in Central Italy[J],2020,125(2).
APA	Mancinelli P.,Pauselli C.,Fournier D.,Fedi M.,Minelli G.,&Barchi M.R..(2020).Three dimensional Gravity Local Inversion Across the Area Struck by the 2016–2017 Seismic Events in Central Italy.Journal of Geophysical Research: Solid Earth,125(2).
MLA	Mancinelli P.,et al."Three dimensional Gravity Local Inversion Across the Area Struck by the 2016–2017 Seismic Events in Central Italy".Journal of Geophysical Research: Solid Earth 125.2(2020).