干旱区生态环境知识资源中心(Arid): Ten-million years of activity within the Eastern California Shear Zone from U-Pb dating of fault-zone opal

Arid

DOI	10.1016/j.epsl.2019.05.047
	Ten-million years of activity within the Eastern California Shear Zone from U-Pb dating of fault-zone opal
	Nuriel, Perach 1,2; Miller, David M.3; Schmidt, Kevin M.3; Coble, Matthew A.1; Maher, Kate 1
通讯作者	Nuriel, Perach
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
EISSN	1385-013X
出版年	2019
卷号	521 页码:37-45
英文摘要	Reconstructions of long-term fault activity are essential for understanding both the mechanisms controlling fault behavior and accurate earthquake hazard assessments. Increasing evidence for temporal variations in strain accumulation suggests non-uniform strain rates over a range of historic to geologic timescales. The paucity of long-term records of fault activity has limited our ability to resolve these variations. We present a method for constraining long-term fault activity based on U-Pb dating of fault-related opal from secondary fault segments within the Eastern California Shear Zone (ECSZ). The presence of sheared and breccia-cemented opaline silica within well-exposed faults at near-surface conditions suggest that opal formation is associated with high-magnitude earthquakes capable of surface rupture (>6 M). Temporal constraints from massive and sheared syntectonic opal (n = 74) on related secondary faults from this study provide new insights on the timing of fault initiation, reactivation, and longevity. The oldest dates obtained indicate that ECSZ activity commenced at or before 10 Ma. Multiple deformation events dated within a single structure on episodically deposited and sheared opal (up to six generations), demonstrate that fault reactivation occurred over 10(5) yr timescales (0.7-0.1 Myr). Relative probabilities of dated deformation events can be used to evaluate changes in fault activity in the past 2.5 Ma (n = 60). This analysis indicates enhanced fault activity starting at 2 Ma and peaking around 1 Ma, possibly due to fault-interactions and distribution of deformation between the ECSZ and the San Andreas Fault. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	U-Pb SHRIMP opal fault dating Eastern California Shear Zone
类型	Article
语种	英语
国家	USA ; Israel
收录类别	SCI-E
WOS记录号	WOS:000476963300004
WOS关键词	YUCCA MOUNTAIN ; SOUTHERN-CALIFORNIA ; ION-MICROPROBE ; MOJAVE DESERT ; SAN-ANDREAS ; GEOCHRONOLOGY ; EVOLUTION ; NEVADA ; BASIN ; SLIP
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215076
作者单位	1.Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA; 2.Geol Survey Israel, 32 Yeshayahu Leibowitz St, IL-9692100 Jerusalem, Israel; 3.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA
推荐引用方式 GB/T 7714	Nuriel, Perach,Miller, David M.,Schmidt, Kevin M.,et al. Ten-million years of activity within the Eastern California Shear Zone from U-Pb dating of fault-zone opal[J]. United States Geological Survey,2019,521:37-45.
APA	Nuriel, Perach,Miller, David M.,Schmidt, Kevin M.,Coble, Matthew A.,&Maher, Kate.(2019).Ten-million years of activity within the Eastern California Shear Zone from U-Pb dating of fault-zone opal.EARTH AND PLANETARY SCIENCE LETTERS,521,37-45.
MLA	Nuriel, Perach,et al."Ten-million years of activity within the Eastern California Shear Zone from U-Pb dating of fault-zone opal".EARTH AND PLANETARY SCIENCE LETTERS 521(2019):37-45.