COLLABORATIVE RESEARCH: Pluton Emplacement in Relation to Jurassic Volcanic Arc Evolution and Orogenesis in the Northern Sierra Terrane, California

加利福尼亚北部的塞拉地体包含了形成于北美太平洋边缘的侏罗纪火山-深成组合的大量暴露物。它提供了对构造事件的时间进行严格限制的可能性，这些构造事件包括与弧的形成及其随后的发展和最终破坏有关的弧岩浆作用、变质作用和变形。这项工作包括使用化石年代和广泛的放射性年代测定，这些年代来自深成岩组合的各个阶段。当与其他数据相结合时，为研究区建立的详细的构造和岩浆事件年表将允许与塞拉山脉其他中中生代地体进行严格的比较，并将有助于评估区域构造模式。

The northern Sierra terrane of California contains extensive exposures of a Jurassic volcano-plutonic assemblage that formed on the Pacific margin of north American. If offers the possibility of placing tight limits on the timing of tectonic events including arc magmatism, metamorphism and deformation associated with building of the arc and its subsequent development and final destruction. The work involves using fossil ages and extensive radiometric age determinations from various phases of the plutonic assemblage. When integrated with other data, the detailed chronology of structural and magmatic events established for the study area will allow rigorous comparison with other mid-Mesozoic terranes in the Sierra and will help evaluate regional tectonic models.