Structural and Metamorphic Evolution of the Chocolate Mountains, Thrust, Southeasternmost California

小行星9316916 晚寒武纪-早第三纪时期的巧克力山逆冲断层是加州东南部一个主要的、广泛的断层带的一部分，该断层带将前寒武纪至中生代的片麻岩置于白垩纪高压/低温片岩之上。 运输方向是向东北方向，这已被用来帮助重建大部分的西南科迪勒拉在白垩纪时期。 最近的研究表明，这个主要断层带的几个部分，包括巧克力山脉。逆冲断层可能已经被重新激活，因此它们可能代表折返作用，而不是俯冲和埋藏构造作用。 本项目将通过详细的构造和变质岩石学野外工作来解决这一争议。 这些结果将使有意义的板块重建中生代第三纪西南科迪勒拉，并将在其他主要造山带类似的构造环境的影响。

9316916 Jacobson The Late Cretaceous-early Tertiary aged Chocolate Mountains thrust is part of a major, extensive fault zone in SE California that places Precambrian to Mesozoic gneisses over Cretaceous high pressure/low temperature schists. The transport direction is toward the NE and this has been used to help reconstruct a large part of the SW Cordillera during Cretaceous times. Recent work has shown that several sections of this major fault zone, including the Chocolate Mts. thrust, may have been reactivated and that they therefore may represent exhumation rather than subduction and burial tectonism. This project will resolve the controversy by detailed field work with structural and metamorphic petrology. The results will allow meaningful plate reconstructions for the Mesozoic to Tertiary in the SW Cordillera, and will have implications for similar tectonic settings in other major orogenic belts.