COLLABORATIVE RESEARCH: Massive Crustal Reorganization in an Extensional Orogen: A Three-Dimensional Perspective from the Colorado River Extensional Corridor

9628380米勒陆壳对伸展的反应是复杂的和不完全理解的，就像岩浆作用所起的作用一样。该项目将研究科罗拉多河延伸走廊的Eldorado山区对延伸的反应，那里暴露出强烈的深度梯度。在北部，伸展主要由脆性特征提供，而在南部，大规模的正断层将更深层次的岩石带到地表。在地质年代学、地球化学和古地磁研究的支持下，对深成岩体和构造特征进行填图和结构分析，将确定厚地壳段的应变组成和三维划分。这些结果将对地壳伸展机制、大陆地壳如何被伸展改造以及岩浆作用在地体伸展中的作用等几个基本问题提供重要的见解。

9628380 Miller The response of the continental crust to extension is complex and incompletely understood, as is the role that magmatisms plays. This project will examine the response to extension in the Eldorado Mountain area of the Colorado River extensional Corridor where a strong depth gradient is exposed. to the north, extension is accommodated by primarily brittle features while to the south, large-scale normal faults bring deeper-level rocks to the surface. Mapping and structural analysis of the plutons and structural features, supported by geochronologic geochemical and paleomagnetic studies, will establish the composition and three-dimensional partitioning of strain in the thick crustal section. Results should provide important insights into several fundamental problems including mechanism of crustal extension, how continental crust is modified by extension and the role of magmatism in extending terranes.