Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31516.1 |
High-resolution seismic profiling reveals faulting associated with the 1934 Ms 6.6 Hansel Valley earthquake (Utah, USA) | |
Bruno, Pier Paolo G.1; DuRoss, Christopher B.2,3; Kokkalas, Sotirios1 | |
2017-09-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates; USA |
英文摘要 | The 1934 Ms 6.6 Hansel Valley, Utah, earthquake produced an 8-km-long by 3-km-wide zone of north-south-trending surface deformation in an extensional basin within the easternmost Basin and Range Province. Less than 0.5 m of purely vertical displacement was measured at the surface, although seismologic data suggest mostly strike-slip faulting at depth. Characterization of the origin and kinematics of faulting in the Hansel Valley earthquake is important to understand how complex fault ruptures accommodate regions of continental extension and transtension. Here, we address three questions: (1) How does the 1934 surface rupture compare with faults in the subsurface? (2) Are the 1934 fault scarps tectonic or secondary features? (3) Did the 1934 earthquake have components of both strike-slip and dip-slip motion? To address these questions, we acquired a 6.6-km-long, high-resolution seismic profile across Hansel Valley, including the 1934 ruptures. We observed numerous east-and west-dipping normal faults that dip 40 degrees-70 degrees and offset late Quaternary strata from within a few tens of meters of the surface down to a depth of similar to 1 km. Spatial correspondence between the 1934 surface ruptures and subsurface faults suggests that ruptures asso-ciated with the earthquake are of tectonic origin. Our data clearly show complex basin faulting that is most consistent with transtensional tectonics. Although the kinematics of the 1934 earthquake remain underconstrained, we interpret the disagreement between surface (normal) and sub-surface (strike-slip) kinematics as due to slip partitioning during fault propagation and to the effect of preexisting structural complexities. We infer that the 1934 earthquake occurred along an similar to 3-km wide, off-fault damage zone characterized by distributed deformation along small-displacement faults that may be alternatively activated during different earthquake episodes. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409330000012 |
WOS关键词 | WESTERN UNITED-STATES ; CONTEMPORARY TECTONICS ; SURFACE DEFORMATION ; GPS MEASUREMENTS ; LAKE BONNEVILLE ; RANGE PROVINCE ; SOUTHERN IDAHO ; WASATCH FAULT ; SLIP ; BASIN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/25086 |
专题 | 地球科学 |
作者单位 | 1.Khalifa Univ Sci & Technol, Petr Inst, POB 2533, Abu Dhabi, U Arab Emirates; 2.Utah Geol Survey, Salt Lake City, UT 84116 USA; 3.US Geol Survey, MS 966,POB 25046, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | Bruno, Pier Paolo G.,DuRoss, Christopher B.,Kokkalas, Sotirios. High-resolution seismic profiling reveals faulting associated with the 1934 Ms 6.6 Hansel Valley earthquake (Utah, USA)[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Bruno, Pier Paolo G.,DuRoss, Christopher B.,&Kokkalas, Sotirios.(2017).High-resolution seismic profiling reveals faulting associated with the 1934 Ms 6.6 Hansel Valley earthquake (Utah, USA).GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Bruno, Pier Paolo G.,et al."High-resolution seismic profiling reveals faulting associated with the 1934 Ms 6.6 Hansel Valley earthquake (Utah, USA)".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论