COLLABORATIVE RESEARCH: Magnitude, Timing, and Paleo- geographic Significance of Mesozoic Compression and Cenozoic Extension in Central Mojave Desert, CA

该项目是对南加州莫哈韦沙漠地区的多学科合作构造调查，将由犹他大学（EAR89-16838）、堪萨斯大学（EAR89-16802）和北卡罗来纳大学（EAR89-17291）的工作人员进行。这项研究将评估在克罗内塞山发现的晚侏罗世褶皱冲断带的连续性，该褶皱冲断带可能继续向西南延伸，并将确定该构造带上可能有多少白垩纪和更年轻的叠印。研究了莫哈韦中部第三系伸展的幅度和空间分布。这项工作将集中于莫哈韦西部前第三纪岩石的野外测图、地质年代学和变质岩石学，以及莫哈韦中部中第三纪同构造矿床的测图、地质年代学和盆地分析。结果将有助于北美西南部的区域构造综合，以及控制大陆边缘造山带构造演化和地壳大规模叠加伸展的过程的表征。

This project is a collaborative multidisciplinary tectonic investigation of the Mojave Desert region of southern California that will be conducted by workers at the University of Utah (EAR89-16838, The University of Kansas (EAR89-16802) and the University of North Carolina (EAR89-17291). The study will assess the continuity of a late Jurassic fold-thrust belt found in the Cronese Hills that may continue to the southwest and will determine how much Cretaceous and younger overprint there may be on this tectonic belt. The magnitude and spatial distribution of Tertiary extension in the Central Mojave will be studied. The work will focus on field mapping, geochronology and metamorphic petrology of pre-Tertiary rocks in the western Mojave and mapping, geochronology and basin analysis of mid-Tertiary syntectonic deposits in the central Mojave. Results will contribute to regional tectonic syntheses of southwestern North America and to characterization of processses governing the tectonic evolution of continental-margin orogens and the large- scale superimposed extension of the crust.