Inverse and Forward Modeling of the Utah System of Colorado Plateau Basement-Cored Uplifts

科罗拉多高原基底核心隆起犹他系统的反演和正演模拟

• 批准号: 0001222
• 负责人: George Davis
• 金额: $ 16.11万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0001222&HistoricalAwards=false
• 关键词: Inverse; Forward; Modeling; Utah; System

Davis0001222In large-scale systems of thin-skinned folding and thrusting a more or less uniform regional stress field is assumed and there is generally a distinct parallelism of folds and thrusts observed oriented approximately perpendicular to the direction of tectonic shortening. However, where the structures are not parallel, it does not follow that the stress field was not regionally uniform; basement inherited features can control structural orientations resulting from a homogeneous stress field. This project will use extensive spatial kinematic data from basement-cored uplifts in the Colorado Plateau that have diverse orientations and model the stress field that was responsible. It is expected that this work will illuminate the regional variations in the Laramide stresses acting on the Colorado Plateau and the effect various pre-existing basement features may have had on the final orientations of various structures. Results should help develop an integrated overview of the structural response of the Colorado Plateau to Laramide tectonics.

Davis 0001222在大规模的薄皮褶皱和逆冲系统中，假定区域应力场或多或少是均匀的，并且通常观察到褶皱和逆冲的明显平行性，其方向大致垂直于构造缩短的方向。 然而，在构造不平行的地方，并不意味着应力场在区域上不均匀;基底继承的特征可以控制由均匀应力场产生的构造取向。 该项目将使用来自科罗拉多高原基底核隆起的大量空间运动学数据，这些隆起具有不同的方向，并对负责的应力场进行建模。 预计这项工作将阐明Laramide应力作用于科罗拉多高原的区域变化，以及各种预先存在的基底特征可能对各种结构的最终取向产生的影响。 结果应有助于制定一个综合概述的结构响应的科罗拉多高原Laramide构造。