气候变化领域集成服务门户(CCPortal): Physical and chemical strain-hardening during faulting in poorly lithified sandstone: The role of kinematic stress field and selective cementation

CCPortal

DOI	10.1130/B35296.1
	Physical and chemical strain-hardening during faulting in poorly lithified sandstone: The role of kinematic stress field and selective cementation
	Pizzati M.; Balsamo F.; Storti F.; Iacumin P.
发表日期	2020
ISSN	167606
起始页码	1183
结束页码	1200
卷号	132 期号:2021-05-06
英文摘要	In this work, we report the results of a multidisciplinary study describing the structural architecture and diagenetic evolution of the Rocca di Neto extensional fault zone developed in poorly lithified sandstones of the Crotone Basin, Southern Italy. The studied fault zone has an estimated displacement of ∼90 m and consists of: (1) a low-deformation zone with subsidiary faults and widely spaced deformation bands; (2) an ∼10-mwide damage zone, characterized by a dense network of conjugate deformation bands; (3) an ∼3-m-wide mixed zone produced by tectonic mixing of sediments with different grain size; (4) an ∼1-m-wide fault core with bedding transposed into foliation and ultracomminute black gouge layers. Microstructural investigations indicate that particulate flow was the dominant early-stage deformation mechanism, while cataclasis became predominant after porosity loss, shallow burial, and selective calcite cementation. The combination of tectonic compaction and preferential cementation led to a strainhardening behavior inducing the formation of "inclined conjugate deformation band sets" inside the damage zone, caused by the kinematic stress field associated with fault activity. Conversely, conjugate deformation band sets with a vertical bisector formed outside the damage zone in response to the regional extensional stress field. Stable isotope analysis helped in constraining the diagenetic environment of deformation, which is characterized by mixed marine-meteoric signature for cements hosted inside the damage zone, while it progressively becomes more meteoric moving outside the fault zone. This evidence supports the outward propagation of fault-related deformation structures in the footwall damage zone. © 2019 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/184792
作者单位	Natural and Experimental Tectonics Research Group, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, 43124, Italy; Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, 43124, Italy
推荐引用方式 GB/T 7714	Pizzati M.,Balsamo F.,Storti F.,et al. Physical and chemical strain-hardening during faulting in poorly lithified sandstone: The role of kinematic stress field and selective cementation[J],2020,132(2021-05-06).
APA	Pizzati M.,Balsamo F.,Storti F.,&Iacumin P..(2020).Physical and chemical strain-hardening during faulting in poorly lithified sandstone: The role of kinematic stress field and selective cementation.Bulletin of the Geological Society of America,132(2021-05-06).
MLA	Pizzati M.,et al."Physical and chemical strain-hardening during faulting in poorly lithified sandstone: The role of kinematic stress field and selective cementation".Bulletin of the Geological Society of America 132.2021-05-06(2020).