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COLLABORATIVE RESEARCH: Interactions in Time and Space of Thermal and Mechanical Processes During Orogeny, Old Woman Mountains Area, SE California

合作研究：造山运动期间热力和机械过程在时间和空间上的相互作用，加利福尼亚州东南部老妇山区

基本信息

批准号：
8904320
负责人：
Calvin Miller
金额：
$ 17.87万
依托单位：
Vanderbilt University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1989
资助国家：
美国
起止时间：
1989-07-15 至 1992-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8904320&HistoricalAwards=false
关键词：
COLLABORATIVE RESEARCH Interactions Time Space

项目摘要

Southeastern California preserves a record of 2 billion years of tectonic history that occurred along the continental margin of the United States. Previous work on this consortium project has provided considerable information about Precambrian structural evolution, Mesozoic compression and Cenozoic exten- sional events in the Old Woman Mountains. This renewal will build on this information to address Mesozoic orogenic processes in continental crust, particularly on the typically obscure early stages of orogeny. The Mesozoic upper crust in this area was first tectonically buried to depths ranging from near zero to more than 20 kilometers, then exhumed rapidly at the end of the Mesozoic, and subsequently preserved largely intact through the mid-Tertiary extension that strongly overprinted adjacent regions. Work will focus on developing prograde thermochrono- metry for the region, the thermal and kinematic history of ductile shear zones, on refinement of thermobarometry and its application to rapidly evolving orogen, the linkage between pluton emplacement and tectonism and attempting to characterize the lower continental crust through high-pressure xenoliths. Results will be integrated in an attempt to discover in some detail the interactions of thermal and mechanical processes active in continental margin dynamics.

加州东南部保留了20亿沿着大陆的构造历史美国的边缘。以前在这个联合体上的工作项目提供了大量关于前寒武纪的信息构造演化、中生代挤压和新生代伸展老女人山的故事此次更新将在此基础上研究中生代造山过程在大陆地壳，特别是在典型的模糊的早期的阶段。该地区中生代上地壳为第一次构造埋深范围从接近零到超过20公里，然后在最后迅速挖掘出来，中生代，并随后保存基本完整，通过第三纪中期的延伸，强烈地叠加在邻近的地区工作将集中在开发热时计- 该地区的热历史和运动学历史，韧性剪切带，温压法的改进及其应用于快速演化的造山带，岩体侵位和构造作用，并试图描述通过高压捕虏体进入下陆壳结果将被整合，试图发现在一些详细说明了热和机械过程的相互作用在大陆边缘动力学方面很活跃。