Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1130/GES00546.1 |
Reanalysis of the COCORP Utah Line 1 deep seismic reflection profile: Toward an improved understanding of the Sevier Desert detachment question | |
McBride, John H.1; Stephenson, William J.2; McBride, Eleanor I. Prussen1 | |
通讯作者 | McBride, John H. |
来源期刊 | GEOSPHERE |
ISSN | 1553-040X |
出版年 | 2010 |
卷号 | 6期号:6页码:840-854 |
英文摘要 | The Sevier Desert detachment (or "reflection," SDR), which underlies the Sevier Desert basin along the eastern margin of the USA Basin and Range, is commonly cited as a "type example" of a low-angle normal fault (LANF) in continental crust. We present the results of reanalyzing the SDR on the COCORP (Consortium for Continental Reflection Profiling) deep seismic profile crossing the Sevier Desert basin (Utah Line 1). We employ a strategy of showing how shallow crustal velocity models, derived from first-break analysis of the shot records, may be used to reduce the effect of lateral velocity variations on imaging the SDR. Our results imply that the irregularities and discontinuities along the SDR are likely caused by overlying lateral velocity variations. The reprocessed versions of the section reveal a smoother, simpler, and more continuous SDR, lacking most of the apparent large offsets and structural variations on the currently available version of the profile. Seismic attribute and structural analyses of the reflection indicate significant variations along the profile, which are likely related in part to the field acquisition, but may also suggest lateral variations in the physical origin of the SDR. Such lateral variations may be consistent with previous studies that challenge the LANF interpretation of the SDR on the basis of attributing different origins to different parts of the reflector; however, a smoother and more continuous SDR points to a tectonically uniform origin and is thus interpreted to be more consistent with a LANF explanation. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000285142400009 |
WOS关键词 | WEST-CENTRAL UTAH ; ANGLE NORMAL FAULTS ; RANGE PROVINCE ; EASTERN BASIN ; UNITED-STATES ; CENOZOIC EXTENSION ; REGIONAL STRUCTURE ; KINEMATIC HISTORY ; THRUST BELT ; CANYON RANGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | United States Geological Survey |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/164373 |
作者单位 | 1.Brigham Young Univ, Dept Geol Sci, Provo, UT 84602 USA; 2.US Geol Survey, Denver, CO 80225 USA |
推荐引用方式 GB/T 7714 | McBride, John H.,Stephenson, William J.,McBride, Eleanor I. Prussen. Reanalysis of the COCORP Utah Line 1 deep seismic reflection profile: Toward an improved understanding of the Sevier Desert detachment question[J]. United States Geological Survey,2010,6(6):840-854. |
APA | McBride, John H.,Stephenson, William J.,&McBride, Eleanor I. Prussen.(2010).Reanalysis of the COCORP Utah Line 1 deep seismic reflection profile: Toward an improved understanding of the Sevier Desert detachment question.GEOSPHERE,6(6),840-854. |
MLA | McBride, John H.,et al."Reanalysis of the COCORP Utah Line 1 deep seismic reflection profile: Toward an improved understanding of the Sevier Desert detachment question".GEOSPHERE 6.6(2010):840-854. |
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