Collaborative Research: Late Cenozoic Detachment Faulting in the Western Salton Trough: Strain Partitioning in an Oblique Active-Margin Rift

合作研究：西部索尔顿海槽晚新生代拆离断层作用：斜活动边缘裂谷中的应变划分

• 批准号: 0125454
• 负责人: Bernard Housen
• 金额: $ 9.1万
• 依托单位: Western Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-02-01 至 2005-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0125454&HistoricalAwards=false
• 关键词: Collaborative; Research; Late; Cenozoic; Detachment

The process of rifting of continents to produce oceanic lithosphere is a first order phenomenon on Earth. Unfortunately, most rifted margins are buried by thick accumulations of sedimentary rock, hindering direct observation of the structures which formed during rifting. This project will address several significant questions about oblique rifting with a multi-disciplinary study of the Salton Trough in southern California. This region is undergoing active extension and right-lateral strike-slip faulting related to opening of the Gulf of California and the San Andreas fault. Exposures of bedrock are excellent and there is an opportunity to examine a plate margin caught in the process of forming. A combination of geological, sedimentological, geophysical, and geochronological methods will be brought to bear to study the partitioning of strain between strike-slip and normal faults and the accompanying sedimnetological response to each.

大陆裂陷形成大洋岩石圈的过程是地球上的一级现象。不幸的是，大多数裂陷边缘都被厚厚的沉积岩所掩埋，这就阻碍了对裂陷过程中形成的构造的直接观察。本计画将以加州南部索尔顿海槽为研究对象，探讨斜向裂谷作用的几个重要问题。这一地区正经历着与加州湾和圣安德烈亚斯断层的张开有关的活动伸展和右行走滑断层作用。基岩的暴露是极好的，有机会检查在形成过程中捕获的板块边缘。地质学，沉积学，地球物理学和地质年代学的方法相结合，将承担研究的分区之间的应变走滑和正断层和相应的sedimnetological响应。