干旱区生态环境知识资源中心(Arid): Geodetic Extension Across the Southern Basin and Range and Colorado Plateau

Arid

DOI	10.1029/2020JB021355
	Geodetic Extension Across the Southern Basin and Range and Colorado Plateau
	Broermann, James; Bennett, Richard A.; Kreemer, Corne; Blewitt, Geoffrey; Pearthree, Philip A.
通讯作者	Broermann, J (corresponding author), Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
ISSN	2169-9313
EISSN	2169-9356
出版年	2021
卷号	126 期号:6
英文摘要	Rates of crustal deformation in the southern Basin and Range (SBR) and Colorado Plateau (CP) provinces are relatively low in the context of the Pacific-North America plate boundary (PA-NA); however, the accumulation of small amounts of strain over long periods of time can lead to large earthquakes such as the M-w 7.5 1887 Sonoran earthquake in northern Mexico. SBR and CP rates of deformation are difficult to quantify due to a dearth of young faulting and seismicity. Moreover, strain accumulation and release related to the adjacent, more active San Andreas and Gulf of California fault systems to the west and southwest can mask the background strain rates associated with SBR and CP tectonics. With data from an enhanced continuous GPS network, we estimate crustal surface velocities of the SBR and CP, after removing coseismic and postseismic displacements, and elastic loading effects arising from major fault zones to the (south)west. We use cluster analysis and geologic data to separate the GPS velocity field into regions and calculate distinct block rotation and uniform strain rates for each region. We find the highest strain rate region includes southwestern Arizona; an area with sparse Quaternary faults, relatively low seismicity, and a relatively large discrepancy between geodetic and geologic rates of deformation. This anomalous strain rate may reflect residual, unmodeled PA-NA strain seeping into the Arizona study area from the west. Alternatively, it may represent the potential for one or more rare, future, large-magnitude earthquakes or indicate strain is being released through other process(es).
英文关键词	Colorado Plateau geodesy plate boundary seismic cycle southern Basin and Range strain rates
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000665206200033
WOS关键词	SAN-ANDREAS FAULT ; RIO-GRANDE RIFT ; GRAVITATIONAL POTENTIAL-ENERGY ; MAYOR-CUCAPAH EARTHQUAKE ; HECTOR-MINE-EARTHQUAKE ; POSTSEISMIC DEFORMATION ; BAJA-CALIFORNIA ; MANTLE BENEATH ; MOJAVE-DESERT ; GPS NETWORK
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350849
作者单位	[Broermann, James; Bennett, Richard A.] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; [Kreemer, Corne; Blewitt, Geoffrey] Univ Nevada, Nevada Bur Mines & Geol, Reno, NV 89557 USA; [Kreemer, Corne] Univ Nevada, Nevada Seismol Lab, Reno, NV 89557 USA; [Pearthree, Philip A.] Univ Arizona, Arizona Geol Survey, Tucson, AZ USA
推荐引用方式 GB/T 7714	Broermann, James,Bennett, Richard A.,Kreemer, Corne,et al. Geodetic Extension Across the Southern Basin and Range and Colorado Plateau[J]. University of Arizona,2021,126(6).
APA	Broermann, James,Bennett, Richard A.,Kreemer, Corne,Blewitt, Geoffrey,&Pearthree, Philip A..(2021).Geodetic Extension Across the Southern Basin and Range and Colorado Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(6).
MLA	Broermann, James,et al."Geodetic Extension Across the Southern Basin and Range and Colorado Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.6(2021).