REU: COLLABORATIVE RESEARCH: The Relationship between Strike-Slip and Detachment Faulting in Regional Extension, Southern Nevada

REU：合作研究：内华达州南部区域延伸中走滑与拆离断层之间的关系

• 批准号: 9017629
• 负责人: Ernest Duebendorfer
• 金额: $ 2.42万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-15 至 1993-02-25
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017629&HistoricalAwards=false
• 关键词: REU; COLLABORATIVE; RESEARCH; Relationship; between

This work will develop a generalized three-dimensional model for the interaction of normal and strike-slip faults during continental extension. The relationship between transverse structures (strike-slip faults) and detachment (normal) faults in southern Nevada will be examined in detail, and a temporal and structural history will be established. To accomplish this, an integrated study will be conducted that involves geologic mapping, geochronology, and seismic reflection profiling across both detachment and strike-slip faults. This is a collaborative proposal with 9018301 which will concentrate on the seismic aspects. Three classes of models will be tested: strike-slip faults ar crust-penetrating, fundamental first order structures and normal faults are secondary; detachment faults are first-order structures and strike-slip faults are secondary transfer faults in the shallow crust; and, strike-slip and normal faults are synchronous and allow extension to occur by the horizontal translation of crustal blocks. The results of this study will provide fundamental three-dimensional information on the mechanisms by which continental crust may extend, and as such have wide-reaching tectonic importance.

本工作将建立大陆伸展过程中正断层与走滑断层相互作用的广义三维模型。内华达南部横向构造（走滑断层）与剥离（正）断层之间的关系将被详细研究，并建立一个时间和构造历史。为了实现这一目标，将进行一项综合研究，包括地质制图、地质年代学和跨剥离和走滑断层的地震反射剖面。这是一个与9018301的合作提案，将集中在地震方面。将测试三类模型：走滑断层是穿壳的，基本一级构造和正断层是次级的；滑脱断裂是浅层地壳的一级构造，走滑断裂是次级转移断裂；走滑断层和正断层是同步的，可以通过地壳块体的水平平移进行伸展。这项研究的结果将为大陆地壳伸展的机制提供基本的三维信息，因此具有广泛的构造重要性。