Knowledge Resource Center for Ecological Environment in Arid Area
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
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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. |
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