COLLABORATIVE RESEARCH: Arc Construction, Deformation, and Metamorphism in the Foothills Terrane, Sierra Nevada

大陆在其边缘的生长是一个重要的过程，包含了各种尚不清楚的机制。尽管研究得很充分，但关于加利福尼亚内华达山脉的构造演化，仍然存在一些主要的未解决的问题，这些问题导致了弧形物质和各种地形向北美大陆的聚集。先前的工作概述了该地区中生代活动方面的一些替代方案，包括变质作用和火成岩侵入的原因和时间。该项目是对Foothills Terrane中部变形和变质作用的协作、综合研究，这是一个包含许多贯穿断层的关键区域，这些断层分离了显著不同的岩石组合。研究结果有望解决对丘陵地体南北构造的不同结论，并为该构造背景下弧的构造和变形提供综合模型的基础。

The growth of continents at their margins is an important process encompassing a variety of poorly understood mechanisms. Although well-studied, there remain major unresolved questions about the tectonic evolution of the Sierra Nevada in California that resulted in accretion of arc material and various terranes to the North American continent. Prior work has outlined a number of alternatives for aspects of the Mesozoic activity in this area including the cause and timing of metamorphism and igneous intrusion. This project is a collaborative, integrated study of deformation and metamorphism in the central part the Foothills Terrane, a key are containing a number of through-going faults separating significantly different assemblages of rock. Results are expected to resolve differences in conclusions drawn for the Foothills Terrane to the north and south and to provide the basis for an integrated model for the construction and deformation of arcs in this tectonic setting.