Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 0337273 |
| Collaborative Research: Testing Tectonic Geodesy from Fault Slip Rates Across the Eastern California Shear Zone | |
| Lesley Perg | |
| 主持机构 | University of Minnesota-Twin Cities |
| 开始日期 | 2004 |
| 结束日期 | 2007-12-31 |
| 资助经费 | 99838(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | TECTONICS |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | The Eastern California Shear zone is an intriguing example of a plate boundary fault system where the known rates of faulting may not add up to the geodetic rate of strain accumulation. This research tests the hypothesis that geologic and geodetic strain rates must somehow agree across the Eastern California Shear zone by gathering new long-term slip rate data from a well-defined, well-exposed, and tectonically simple transect of active faulting across the central Mojave Desert. Field geomorphic and geologic mapping, augmented by targeted acquisition of high-resolution airborne laser swath mapping altimetry data, will document offset Plio-Quaternary lava flows and alluvial fans across each of six right-lateral strike-slip faults. Selected offset markers will be dated with 40Ar/39Ar, cosmogenic 10Be or cosmogenic 3He to measure crustal deformation rates at 10^5 to 10^6 year time scales that average several earthquake cycles. If the geology does account for the geodetic strain rate through significant slip rates on one or more faults, the predictive capability of tectonic geodesy is demonstrated. Alternatively, if the long-term geologic strain rate is significantly slower than the geodetic rate, as seems to be supported by existing paleoseismic data, then a system-wide transient loading process must be responsible for the high present-day strain accumulation across the Eastern California Shear zone. |
| 来源学科分类 | Geosciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337273 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/342316 |
| 推荐引用方式 GB/T 7714 | Lesley Perg.Collaborative Research: Testing Tectonic Geodesy from Fault Slip Rates Across the Eastern California Shear Zone.2004. |
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