Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31961.1 |
Glacial chronology and slip rate on the west Klamath Lake fault zone, Oregon | |
Speth, Gunnar T.1; Amos, Colin B.1; Amidon, William H.2; Balco, Greg3; Meigs, Andrew J.4; Graf, Samuel2 | |
2019-03-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2019 |
卷号 | 131页码:444-460 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | New geomorphic mapping and cosmogenic He-3 geochronology on the west Klamath Lake fault zone in southern Oregon, USA, constrain the age of glacial and post-glacial landforms and the rate of normal-fault slip over the past ca. 150 k.y. We focus on geomorphic features that record progressive offset over multiple time intervals in order to detect potential secular changes in fault slip rate. Thirty-nine new cosmogenic He-3 surface exposure dates and a depth profile establish a late-Pleistocene glacial chronology in the southern Cascade Range of Oregon and constrain the timing of the last two major glacial advances in the region at 17.6 +/- 2.1 ka (1 sigma) and 97.6 +/- 12.1 ka. Additionally, these data provide evidence that an older glacial advance likely occurred during marine isotope stage (MIS) 6. Fault scarp profiles from high-resolution airborne lidar, in combination with the exposure age data, allow the calculation of fault slip rates over intervals of ca. 10(4)-10(5) years. Our calculations indicate dip-slip rates of similar to 0.3 mm/yr since ca.100 ka, which may represent an increase from <0.1 mm/yr prior to ca. 100 ka, depending on the absolute age of the older glacial moraines. These rates provide insights into the structure of the Klamath Basin and suggest that despite a complex surface expression, individual fault strands likely merge to a single fault at depth. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000460031700006 |
WOS关键词 | SOUTHERN CASCADE RANGE ; ALTYN TAGH FAULT ; CRATER LAKE ; ERUPTIVE HISTORY ; COSMOGENIC HE-3 ; MOUNT MAZAMA ; EARTHQUAKE ; CALIFORNIA ; REGION ; BASIN |
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/24354 |
专题 | 地球科学 |
作者单位 | 1.Western Washington Univ, Geol Dept, Bellingham, WA 98225 USA; 2.Middlebury Coll, Dept Geol, Middlebury, VT 05753 USA; 3.Berkeley Geochronol Ctr, Berkeley, CA 94709 USA; 4.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA |
推荐引用方式 GB/T 7714 | Speth, Gunnar T.,Amos, Colin B.,Amidon, William H.,et al. Glacial chronology and slip rate on the west Klamath Lake fault zone, Oregon[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2019,131:444-460. |
APA | Speth, Gunnar T.,Amos, Colin B.,Amidon, William H.,Balco, Greg,Meigs, Andrew J.,&Graf, Samuel.(2019).Glacial chronology and slip rate on the west Klamath Lake fault zone, Oregon.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,131,444-460. |
MLA | Speth, Gunnar T.,et al."Glacial chronology and slip rate on the west Klamath Lake fault zone, Oregon".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 131(2019):444-460. |
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