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 0087125AN在研究当前活跃的构造系统的重要问题是遗传特征的作用。 该项目将探讨西南山脉的上地幔的结构和组成与主要的表面构造特征之间的关系，这可能是从laramide板的浅层段中固有的，而laramide板的浅层部分则位于莫哈韦沙漠地区以下，从而增强了现代板连接系统的增强。 在北部，内华达州塞拉山脉的完整石器时代片段保留了其高密度龙骨，该龙骨容易受到分层的影响，并在裂谷和转化到该地区的构造和转化时，将其建立在地幔中。 结果应有助于解释内华达山脉和莫哈韦沙漠对现代构造系统发作的截然不同的反应。