COLLABORATIVE RESEARCH: Studies of Large-Magnitude Intra- continental Extensional Strain, Death Valley Region, California

死亡谷的大规模陆内伸展 加州地区已被模拟使用前拉伸 前第三纪逆冲断层和古生代地层等标志， 图形趋势。 该模型表明， 该地区是容纳批发分离的上部15公里 大陆地壳沿着一个离散的，西倾的 宽度小于10公里的正断层。 在接下来的150公里中， 地壳深部均衡上升，填补了这一空白 在分隔块之间。 体积小断层 从挂壁块中依次转移条子 分离的长条和明显的停止主要延伸 随悬壁向西迁移。 This project will use 构造制图、古地磁学和热年代学 来严格测试这个模型。 结果很重要 美国西南部的地质构造以及 大规模的大陆扩张

Large-magnitude intracontinental extension in the Death Valley region of California has been modeled by using pre-extensional markers such as pre-Tertiary thrust faults and Paleozoic strati- graphic trends. The model indicates that extension across the region was accommodated by wholesale separation of the upper 15 km of the continental crust along a discrete, west-dipping zone of normal faults less than 10 km in width. During the ensuing 150km of pull apart, deep crust rose isostatically and filled the void left between the separating blocks. Volumetrically minor fault slivers were sequentially transferred from the hanging wall block to the detached slivers and apparent cessation of major extension migrated westward with the hanging wall. This project will use structural mapping, paleomagnetism and thermochronology of the slivers to rigorously test this model. Results are of importance to south-western U.S. tectonics and to the general process of large-scale continental extension.