Truncation of Antler and Sonoma Orogenic Belts: Tectonic Significance of Prebatholithic Structural Breaks, Eastern Sierra Nevada, California

加州东部的内华达山脉基底可能隐藏着截断旧构造走向的主要左旋或右旋断层。在岩基中有几个变质岩垂坠，从锶同位素数据推断，这些变质岩垂坠延伸到几个底石器内断裂。该项目将对这些岩石进行检查，以确定它们的结构、地层学和U-Pb年代学，以测试是否存在与岩基中同位素变化相吻合的结构断裂。研究结果将对中生代美国西南部重建中的主要问题产生影响。

The Sierra Nevada batholith in eastern California may conceal major sinistral or dextral faults that truncate older structural trends. Within the batholith are several pendants of metamorphic rocks that extend across several intrabatholithic breaks inferred from strontium isotopic data. This project will examine these rocks to determine their structure, stratigraphy and U-Pb geochronology in order to test whether there are structural breaks that coincide with the isotopic changes in the batholith. Results will bear on major problems in the reconstruction of the southwestern United States during the Mesozoic.