Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1711203114 |
From coseismic offsets to fault-block mountains | |
Thompson, George A.1; Parsons, Tom2 | |
2017-09-12 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:37页码:9820-9825 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In the Basin and Range extensional province of the western United States, coseismic offsets, under the influence of gravity, display predominantly subsidence of the basin side (fault hanging wall), with comparatively little or no uplift of the mountainside (fault footwall). A few decades later, geodetic measurements [GPS and interferometric synthetic aperture radar (InSAR)] show broad (similar to 100 km) aseismic uplift symmetrically spanning the fault zone. Finally, after millions of years and hundreds of fault offsets, the mountain blocks display large uplift and tilting over a breadth of only about 10 km. These sparse but robust observations pose a problem in that the coesismic uplifts of the footwall are small and inadequate to raise the mountain blocks. To address this paradox we develop finite-element models subjected to extensional and gravitational forces to study time-varying deformation associated with normal faulting. Stretching the model under gravity demonstrates that asymmetric slip via collapse of the hanging wall is a natural consequence of coseismic deformation. Focused flow in the upper mantle imposed by deformation of the lower crust localizes uplift, which is predicted to take place within one to two decades after each large earthquake. Thus, the best-preserved topographic signature of earthquakes is expected to occur early in the postseismic period. |
英文关键词 | rifting finite-element modeling earthquakes crustal deformation Basin and Range |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410293400040 |
WOS关键词 | WESTERN UNITED-STATES ; NEVADA SEISMIC BELT ; PEAK-DIXIE VALLEY ; STRESS TRANSFER ; RANGE PROVINCE ; SIERRA-NEVADA ; EARTHQUAKE ; BASIN ; DEFORMATION ; RELAXATION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204778 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Stanford Univ, Dept Geophys, Stanford, CA 94305 USA; 2.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA |
推荐引用方式 GB/T 7714 | Thompson, George A.,Parsons, Tom. From coseismic offsets to fault-block mountains[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(37):9820-9825. |
APA | Thompson, George A.,&Parsons, Tom.(2017).From coseismic offsets to fault-block mountains.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(37),9820-9825. |
MLA | Thompson, George A.,et al."From coseismic offsets to fault-block mountains".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.37(2017):9820-9825. |
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