Collaborative Research: Paleomagnetic Investigation of Miocene Sediments in the Gale Hills, Southern Nevada: Tectonics of Vertical Axis Rotations

合作研究：内华达州南部大风山中新世沉积物的古地磁调查：垂直轴旋转的构造

• 批准号: 9219837
• 负责人: Craig Jones
• 金额: $ 7.38万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219837&HistoricalAwards=false
• 关键词: Collaborative; Research; Paleomagnetic; Investigation; Miocene

Vertical axis rotations (with respect to original or regional orientations) of blocks of rock have been defined adjacent to major strike-slip faults. Kinematic models for these rotations have been proposed, and they require knowledge of the size of the blocks that behave rigidly and the spatial and temporal distributions of rotations. However available data do not allow testing between the various models. This project will examine paleomagnetically determined rotations adjacent to the Las Vegas Valley Shear Zone and the Lake Mead Fault System. The rocks yield stable primary directions and show large rotations. Dense sampling will constrain the size of blocks and their distribution with respect to the faults. Results should help resolve competing kinematic models for vertical axis rotations and permit the development of physical models describing fundamental processes during crustal deformation.

垂直轴旋转（相对于原始或 岩石块的区域方向）已经被定义 靠近主要的走滑断层 运动学模型 这些轮换已经提出，他们需要 对刚性块体尺寸的了解， 旋转的时空分布。 然而，现有数据不允许在 各种型号。 这个项目将研究古地磁学 确定了邻近拉斯维加斯谷切变的旋转 米德湖断层系统Lake Mead Fault System 岩石屈服稳定 主要方向，并显示大旋转。 密集采样 将限制块的大小及其分布 关于故障。 结果应有助于解决 垂直轴旋转的竞争运动学模型， 允许开发物理模型， 地壳形变的基本过程。