Arid
DOI10.1093/gji/ggt189
Kinematics of rotating panels of E-W faults in the San Andreas system: what can we tell from geodesy?
Platt, J. P.; Becker, T. W.
通讯作者Platt, J. P.
来源期刊GEOPHYSICAL JOURNAL INTERNATIONAL
ISSN0956-540X
出版年2013
卷号194期号:3页码:1295-1301
英文摘要

Sets of E- to NE-trending sinistral and/or reverse faults occur within the San Andreas system, and are associated with palaeomagnetic evidence for clockwise vertical-axis rotations. These structures cut across the trend of active dextral faults, posing questions as to how displacement is transferred across them. Geodetic data show that they lie within an overall dextral shear field, but the data are commonly interpreted to indicate little or no slip, nor any significant rate of rotation. We model these structures as rotating by bookshelf slip in a dextral shear field, and show that a combination of sinistral slip and rotation can produce the observed velocity field. This allows prediction of rates of slip, rotation, fault-parallel extension and fault-normal shortening within the panel. We use this method to calculate the kinematics of the central segment of the Garlock Fault, which cuts across the eastern California shear zone at a high angle. We obtain a sinistral slip rate of 6.1 +/- 1.1 mm yr(-1), comparable to geological evidence, but higher than most previous geodetic estimates, and a rotation rate of 4.0 +/- 0.7 degrees Myr(-1) clockwise. The western Transverse Ranges transect a similar shear zone in coastal and offshore California, but at an angle of only 40 degrees. As a result, the faults, which were sinistral when they were at a higher angle to the shear zone, have been reactivated in a dextral sense at a low rate, and the rate of rotation of the panel has decreased from its long-term rate of similar to 5 degrees to 1.6 degrees +/- 0.2 degrees Myr(-1) clockwise. These results help to resolve some of the apparent discrepancies between geological and geodetic slip-rate estimates, and provide an enhanced understanding of the mechanics of intracontinental transform systems.


英文关键词Continental margins: transform Continental tectonics: strike-slip and transform Dynamics and mechanics of faulting Fractures and faults Kinematics of crustal and mantle deformation Crustal structure North America
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000323442800003
WOS关键词CALIFORNIA SHEAR ZONE ; WESTERN TRANSVERSE RANGES ; AMERICA PLATE BOUNDARY ; VERTICAL-AXIS ROTATION ; SOUTHERN-CALIFORNIA ; STRAIN ACCUMULATION ; CRUSTAL BLOCKS ; GARLOCK FAULT ; MOJAVE DESERT ; MANTLE FLOW
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/177398
作者单位Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA
推荐引用方式
GB/T 7714
Platt, J. P.,Becker, T. W.. Kinematics of rotating panels of E-W faults in the San Andreas system: what can we tell from geodesy?[J],2013,194(3):1295-1301.
APA Platt, J. P.,&Becker, T. W..(2013).Kinematics of rotating panels of E-W faults in the San Andreas system: what can we tell from geodesy?.GEOPHYSICAL JOURNAL INTERNATIONAL,194(3),1295-1301.
MLA Platt, J. P.,et al."Kinematics of rotating panels of E-W faults in the San Andreas system: what can we tell from geodesy?".GEOPHYSICAL JOURNAL INTERNATIONAL 194.3(2013):1295-1301.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Platt, J. P.]的文章
[Becker, T. W.]的文章
百度学术
百度学术中相似的文章
[Platt, J. P.]的文章
[Becker, T. W.]的文章
必应学术
必应学术中相似的文章
[Platt, J. P.]的文章
[Becker, T. W.]的文章
相关权益政策
暂无数据
收藏/分享

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。