COLLABORATIVE RESEARCH: Nature of the Middle Crust during Orogenesis- Thermal, Mechanical, and Geodynamic Properties Inferred from Proterozoic Rocks of the Southwestern U.S

合作研究：造山作用期间中地壳的性质——从美国西南部元古界岩石推断的热、机械和地球动力学特性

• 批准号: 9507984
• 负责人: Michael Williams
• 金额: $ 7.85万
• 依托单位: University of Massachusetts Amherst
• 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: 1995-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9507984&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Nature; Middle; Crust

Thermal and mechanical processes during deformation of the middle crust affect the style of tectonic interactions observed at the earth s surface, however not elough is known about the middle crust to allow predictive models. This project will use the extensively exposed middle crustal rocks of the southwest United States to study the mutual interaction of plutonism, deformation and metamorphism at middle crustal levels to attempt to determine its control on the strength and behavior of the continental lithosphere during orogeny. Work will focus on testing the idea that the middle crust is heterogeneous but crudely rheologically layered and that various depths have characteristic Ptt loops. Results will help clarify middle crustal deformation dynamics for the Proterozoic of the Southwest, which should provide elements of general model for middle crustal deformation.

中地壳变形过程中的热过程和力学过程影响着地球表面观测到的构造相互作用的类型，然而对中地壳的了解还不够，无法建立预测模型。 该项目将利用美国西南部大面积出露的中地壳岩石，研究中地壳层面的深成岩、变形和变质作用的相互作用，试图确定其在造山运动期间对大陆岩石圈强度和行为的控制。 工作将集中在测试的想法，即中地壳是异质的，但粗糙的流变分层，不同的深度有特点的铂环。 研究结果将有助于阐明西南地区元古代中地壳变形动力学，为中地壳变形的一般模式提供依据。