气候变化领域集成服务门户(CCPortal): Present-Day and Long-Term Uplift Across the Western Transverse Ranges of Southern California

CCPortal

DOI	10.1029/2020JB019672
	Present-Day and Long-Term Uplift Across the Western Transverse Ranges of Southern California
	Johnson K.M.; Hammond W.C.; Burgette R.J.; Marshall S.T.; Sorlien C.C.
发表日期	2020
ISSN	21699313
卷号	125 期号:8
英文摘要	It has been known for decades that the present-day shortening rates across the Western Transverse Ranges (WTR) in Southern California are rapid, reaching 10–15 mm/year near the heavily populated Los Angeles area. However, only recently have geodetic measurements of vertical motion in the WTR been sufficiently dense to resolve a tectonic vertical signal. In this study, we show that much of the geodetically derived vertical velocity field in the WTR can be attributed to the interseismic signal of strain accumulation on reverse faults. We invert geodetic and geologic data for slip rate and interseismic coupling on faults using a kinematic model consisting of faults embedded in an elastic crust over an inviscid mantle. This method allows us to infer the permanent, long-term component of vertical motions from recoverable, short-term motions. We infer that much of the geodetically observed 3–4 mm/year of differential vertical motion across the WTR, involving subsidence along the Santa Barbara coastline and uplift of the Santa Ynez Range, can be attributed to recoverable elastic deformation associated with interseismic locking on faults dipping under the WTR. The sum of dip-slip rates across the WTR decreases from 10.5–14.6 mm/year on the east side near Ventura, California to 5–6.2 mm/year across the western side of the Santa Barbara Channel. The total moment accumulation rate in both the Santa Barbara Channel and the combined San Fernando Valley-LA Basin regions is equivalent to about two Mw = 7 earthquakes every 100 years. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	kinematic model; slip rates; uplift; Ventura Basin; Western Transverse Ranges
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187668
作者单位	Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, Bloomington, IN, United States; Nevada Geodetic Laboratory, Nevada Bureau of Mines and Geology, University of Nevada, Reno, Reno, NV, United States; Department of Geological Sciences, New Mexico State University, Las Cruces, NM, United States; Department of Geological and Environmental Sciences, Appalachian State University, Boone, NC, United States; Earth Research Institute, University of California, Santa Barbara, CA, United States
推荐引用方式 GB/T 7714	Johnson K.M.,Hammond W.C.,Burgette R.J.,et al. Present-Day and Long-Term Uplift Across the Western Transverse Ranges of Southern California[J],2020,125(8).
APA	Johnson K.M.,Hammond W.C.,Burgette R.J.,Marshall S.T.,&Sorlien C.C..(2020).Present-Day and Long-Term Uplift Across the Western Transverse Ranges of Southern California.Journal of Geophysical Research: Solid Earth,125(8).
MLA	Johnson K.M.,et al."Present-Day and Long-Term Uplift Across the Western Transverse Ranges of Southern California".Journal of Geophysical Research: Solid Earth 125.8(2020).