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

合作研究：内华达州南部区域延伸区走滑与拆离断层之间的关系

• 批准号: 9018303
• 负责人: Ross Black
• 金额: --
• 依托单位: University of Kansas Main Campus
• 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 1993-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018303&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Relationship; Between; Strike

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 collaborative proposal with 9017629 which will address the geologic mapping and geochronology. 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.

这项工作将发展一个广义三维模型的相互作用，正常和走滑断层在大陆伸展。将详细研究内华达州南部横向构造（走滑断层）和拆离断层（正断层）之间的关系，并建立时间和构造历史。为了实现这一目标，将进行一项综合研究，包括地质测绘、地质年代学和横跨拆离断层和走滑断层的地震反射剖面。这份与9017629合作的提案将涉及地质制图和地质年代学。将检验三类模型：走滑断层是穿壳的，基本一级构造和正断层是次级的;拆离断层是一级构造，走滑断层是地壳浅部的次级转换断层;走滑断层和正断层是同步的，并允许通过地壳块体的水平平移而发生伸展。这项研究的结果将提供关于大陆地壳可能伸展的机制的基本三维信息，因此具有广泛的构造意义。