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DOI	10.1130/G47729.1
	Thin creme brulee rheological structure for the Eastern California Shear Zone
	Liu, Shaozhuo; Shen, Zheng-Kang; Burgmann, Roland; Jonsson, Sigurjon
通讯作者	Liu, SZ (corresponding author), King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 23955, Makkah, Saudi Arabia.
来源期刊	GEOLOGY
ISSN	0091-7613
EISSN	1943-2682
出版年	2021
卷号	49 期号:2 页码:216-221
英文摘要	Since the occurrence of the 1992 CE Mw 7.3 Landers and 1999 Mw 7.1 Hector Mine earthquakes in the Mojave Desert (California, USA), postseismic deformation following both earthquakes has been intensively studied, and models with a strong crust overlying a low-viscosity mantle asthenosphere have been favored. However, we recently found that the near-field postseismic transients after the two earthquakes have lasted longer than previously thought, which requires a revision of the postseismic modeling. Our new modeling results based on the revised postseismic transients show that: (1) the effective viscosity of the lower crust beneath the Mojave region at the decadal time scale is similar to 2 x 10(20) Pa.s (transient viscosity similar to 2 x 10(19) Pa.s), i.e., only similar to 5 times that of the underlying mantle asthenosphere, and (2) the transient viscosity of the upper mantle exhibits a time-dependent increase, providing fresh geodetic evidence for frequency-dependent rheology (e.g., Andrade or extended Burgers rheology). The inferred transient rheology for the first year agrees well with that obtained for the July 2019 Mw 6.4 and Mw 7.1 Ridgecrest earthquakes similar to 180 km north of the two Mojave events. Our modeling results support a thin creme brulee model for the Eastern California Shear Zone (part of the Pacific-North America plate boundary) in which both the lower crust and the upper mantle exhibit ductility at decadal time scales.
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000613644100020
WOS关键词	SOUTHERN CALIFORNIA ; MOJAVE-DESERT ; HECTOR MINE ; LOWER CRUST ; POSTSEISMIC DEFORMATION ; COSEISMIC DEFORMATION ; MECHANICAL-PROPERTIES ; LANDERS EARTHQUAKE ; MANTLE ; BENEATH
WOS类目	Geology
WOS研究方向	Geology
来源机构	北京大学 ; University of California, Berkeley ; University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350398
作者单位	[Liu, Shaozhuo; Jonsson, Sigurjon] King Abdullah Univ Sci & Technol, Phys Sci & Engn Div, Thuwal 23955, Makkah, Saudi Arabia; [Shen, Zheng-Kang] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA; [Shen, Zheng-Kang] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China; [Burgmann, Roland] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Liu, Shaozhuo,Shen, Zheng-Kang,Burgmann, Roland,et al. Thin creme brulee rheological structure for the Eastern California Shear Zone[J]. 北京大学, University of California, Berkeley, University of California, Los Angeles,2021,49(2):216-221.
APA	Liu, Shaozhuo,Shen, Zheng-Kang,Burgmann, Roland,&Jonsson, Sigurjon.(2021).Thin creme brulee rheological structure for the Eastern California Shear Zone.GEOLOGY,49(2),216-221.
MLA	Liu, Shaozhuo,et al."Thin creme brulee rheological structure for the Eastern California Shear Zone".GEOLOGY 49.2(2021):216-221.