Mesozoic-Cenozoic Tectonic Evolution of the Mojave Desert, California

加利福尼亚州莫哈韦沙漠的中生代-新生代构造演化

• 批准号: 9418834
• 负责人: Roy Dokka
• 金额: $ 25.74万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418834&HistoricalAwards=false
• 关键词: Mesozoic; Cenozoic; Tectonic; Evolution; Mojave

9418834 Dokka The Mojave block previously considered to be a relatively intact terrane has been shown to be the product of Sevier-aged thrusting followed by Cenozoic extensions and strike-slip faulting. Most of the major tectonic elements responsible for late Mesozoic and Cenozoic activity have been identified, however critical unstudied processes involved in the evolution of the Trans Mojave- Sierran shear zone and the Eastern California shear zone remain. The project will define the limits of these features to understand the geometry, kinematics and timing of the associated strain. Results will allow construction of a model to palinspastically restore the Mojave Desert region, accounting for all mountain range scale translations and vertical axis rotations. The model will be useful in reconciling the response of the Southern California borderland to the plate motions between the Pacific and North American plates.

9418834 Dokka，莫哈韦地块，以前被认为是一个相对完整的地体，已被证明是塞维尔时代逆冲作用的产物，随后是新生代伸展和走滑断层作用的产物。大多数负责晚中生代和新生代活动的主要构造要素已经确定，但涉及横贯莫哈韦-西尔兰剪切带和东加州剪切带演化的关键未研究过程仍然存在。该项目将定义这些特征的限制，以了解相关应变的几何、运动学和时序。结果将允许建造一个模型，以复古的方式恢复莫哈韦沙漠地区，考虑到所有山脉尺度的平移和垂直轴的旋转。该模型将有助于协调南加州边界地区对太平洋和北美板块之间的板块运动的响应。