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DOI | 10.1130/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
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
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 |
推荐引用方式 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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