GSTDTAP  > 地球科学
DOI10.1130/B35363.1
Holocene earthquake history and slip rate of the southern Teton fault, Wyoming, USA
DuRoss, Christopher B.1; Gold, Ryan D.1; Briggs, Richard W.1; Delano, Jaime E.1; Ostenaa, Dean A.2; Zellman, Mark S.3; Cholewinski, Nicole1,6; Wittke, Seth J.4; Mahan, Shannon A.5
2020-07-01
发表期刊GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
EISSN1943-2674
出版年2020
卷号132期号:7-8页码:1566-1586
文章类型Article
语种英语
国家USA
英文摘要

The 72-km-long Teton normal fault bounds the eastern base of the Teton Range in northwestern Wyoming, USA. Although geomorphic surfaces along the fault record latest Pleistocene to Holocene fault movement, the postglacial earthquake history of the fault has remained enigmatic. We excavated a paleoseismic trench at the Buffalo Bowl site along the southernmost part of the fault to determine its Holocene rupture history and slip rate. At the site, similar to 6.3 m of displacement postdates an early Holocene (ca. 10.5 ka) alluvial-fan surface. We document evidence of three surface-faulting earthquakes based on packages of scarp-derived colluvium that postdate the alluvial-fan units. Bayesian modeling of radiocarbon and luminescence ages yields earthquake times of ca. 9.9 ka, ca. 7.1 ka, and ca. 4.6 ka, forming the longest, most complete paleoseismic record of the Teton fault. We integrate these data with a displaced deglacial surface 4 km NE at Granite Canyon to calculate a postglacial to mid-Holocene (14.4-4.6 ka) slip rate of similar to 1.1 mm/yr. Our analysis also suggests that the postglacial to early Holocene (14.4-9.9 ka) slip rate exceeds the Holocene (9.9-4.6 ka) rate by a factor of similar to 2 (maximum of 3); however, a uniform rate for the fault is possible considering the 95% slip-rate errors. The similar to 5 k.y. elapsed time since the last rupture of the southernmost Teton fault implies a current slip deficit of similar to 4-5 m, which is possibly explained by spatially/temporally incomplete paleoseismic data, irregular earthquake recurrence, and/or variable per-event displacement. Our study emphasizes the importance of minimizing slip-rate uncertainties by integrating paleoseismic and geomorphic data sets and capturing multiple earthquake cycles.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000545115400012
WOS关键词RANGE PROVINCE ; GARLOCK FAULT ; RUPTURE ; BASIN ; ZONE ; DISPLACEMENT ; CALIFORNIA ; LAKE ; YELLOWSTONE ; SYSTEM
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/289426
专题地球科学
作者单位1.US Geol Survey, MS 966,POB 25046, Denver, CO 80225 USA;
2.Ostenaa Geol, 25 Grays Peak Trail, Dillon, CO 80435 USA;
3.BGC Engn Inc, Suite 211,701 12th St, Golden, CO 80401 USA;
4.Wyoming State Geol Survey, POB 1347, Laramie, WY 82073 USA;
5.US Geol Survey, MS 974,POB 25046, Denver, CO 80225 USA;
6.GEI Consultants, 2868 Prospect Pk,Dr 400, Cordova, CA 95670 USA
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GB/T 7714
DuRoss, Christopher B.,Gold, Ryan D.,Briggs, Richard W.,et al. Holocene earthquake history and slip rate of the southern Teton fault, Wyoming, USA[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2020,132(7-8):1566-1586.
APA DuRoss, Christopher B..,Gold, Ryan D..,Briggs, Richard W..,Delano, Jaime E..,Ostenaa, Dean A..,...&Mahan, Shannon A..(2020).Holocene earthquake history and slip rate of the southern Teton fault, Wyoming, USA.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(7-8),1566-1586.
MLA DuRoss, Christopher B.,et al."Holocene earthquake history and slip rate of the southern Teton fault, Wyoming, USA".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.7-8(2020):1566-1586.
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