气候变化领域集成服务门户(CCPortal): The impact of weathering upon the roughness characteristics of a splay of the active fault system responsible for the massive 2016 seismic sequence of the Central Apennines, Italy

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DOI	10.1130/B35661.1
	The impact of weathering upon the roughness characteristics of a splay of the active fault system responsible for the massive 2016 seismic sequence of the Central Apennines, Italy
	Corradetti A.; Zambrano M.; Tavani S.; Tondi E.; Seers T.D.
发表日期	2021
ISSN	167606
起始页码	885
结束页码	896
卷号	133 期号:2021-03-04
英文摘要	Fault roughness constitutes a key element in the understanding of earthquake nucleation, and surficial asperities on the fault plane play a critical role in slip dynamics and frictional behavior during the seismic cycle. Since it is not generally feasible to recover fault roughness profiles or maps directly at the seismogenic sources, faults at the Earth’s surface are typically used as analogues. However, these analogue fault surfaces are often subjected to weathering and erosion, which in turn, reduces their representativeness as seismogenic faults. Rupture along active faults episodically exposes “fresh” fault planes at the Earth’s surface, which represent the best available targets for the evaluation of fault roughness generated at seismogenic depths. Here we present a study conducted on a splay of the Mt. Vettore fault system in the Central Apennines, Italy, along a vertical transect that includes both a weathered and freshly exposed portion of the fault. The latter was exposed after the dramatic Mw 6.5 shock that hit the area on 30 October 2016. We have produced a highly detailed model (i.e., point cloud) of a section of the fault using structure from motion-multiview stereo photogrammetry to assess its roughness parameters (i.e., the Hurst fractal parameter) and to determine the extent to which these parameters are affected by weathering assuming that they had similar fractal characteristics when reaching the surface. Our results show that weathering can modify the value of the fractal parameters. In particular, by independently analyzing different patches of the fault, we have observed that the smoother and recently exposed portions have an average Hurst exponent of 0.52 while the average Hurst exponent of zones with more prolonged exposure times is 0.64. Accordingly, we conclude that by using high-resolution point clouds, it is possible to recognize patches of faults having a similar intensity of deterioration attributable to weathering. © 2020 Geological Society of America
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184690
作者单位	Department of Petroleum Engineering, Texas A&M University at Qatar, Education City, P.O. Box 23874, Doha, Qatar; School of Science and Technology, Geology Division, University of Camerino, Via Gentile III da Varano, Camerino, (MC) 62032, Italy; DiSTAR, Università di Napoli Federico II, 21 Via vicinale cupa Cintia, Napoli, 80126, Italy
推荐引用方式 GB/T 7714	Corradetti A.,Zambrano M.,Tavani S.,et al. The impact of weathering upon the roughness characteristics of a splay of the active fault system responsible for the massive 2016 seismic sequence of the Central Apennines, Italy[J],2021,133(2021-03-04).
APA	Corradetti A.,Zambrano M.,Tavani S.,Tondi E.,&Seers T.D..(2021).The impact of weathering upon the roughness characteristics of a splay of the active fault system responsible for the massive 2016 seismic sequence of the Central Apennines, Italy.Bulletin of the Geological Society of America,133(2021-03-04).
MLA	Corradetti A.,et al."The impact of weathering upon the roughness characteristics of a splay of the active fault system responsible for the massive 2016 seismic sequence of the Central Apennines, Italy".Bulletin of the Geological Society of America 133.2021-03-04(2021).