Collaborative Research: Testing the Degree of Correspondence between Surface Tectonic Features and Upper Mantle Structure and Composition by Study of Volcanic-Hosted Xenoliths

合作研究：通过火山包体研究检验地表构造特征与上地幔结构和成分的对应程度

• 批准号: 0087125
• 负责人: Mihai Ducea
• 金额: $ 12.5万
• 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: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0087125&HistoricalAwards=false
• 关键词: Collaborative; Research; Testing; Degree; Correspondence

Saleeby 0087347Ducea 0087125An important concern in the study of a currently active tectonic system is the role of inherited features. This project will explore the relationships between the structure and composition of the upper mantle and major surface tectonic features in the southwest Cordillera, that may be inherent from the shallow segment of the Laramide slab having been emplaced beneath the Mojave Desert region, thus strengthening against the modern plate juncture system. To the north, the intact batholithic segment in the Sierra Nevada retained its high-density keel which was susceptible to delamination and foundering into the mantle as rifting and transform tectonic propagated into the region. Results should help explain the dramatically different response of the Sierra Nevada and the Mojave desert to onset of the modern tectonic system.

Saleeby 0087347Ducea 0087125研究当前活动构造体系的一个重要问题是继承特征的作用。 本项目将探讨上地幔的结构和组成与西南科迪勒拉山脉主要地表构造特征之间的关系，这些特征可能是莫哈韦沙漠地区之下的Laramide板块浅段所固有的，从而加强了现代板块接合系统。 在北部，内华达州山脉完整的岩基部分保留了高密度的龙骨，当裂谷和转换构造传播到该地区时，龙骨容易分层并沉入地幔。 研究结果应该有助于解释内华达州和莫哈韦沙漠对现代构造系统的发生所做出的截然不同的反应。