COLLABORATIVE RESEARCH: Magnitude, Timing, and Paleo- geographic Significance of Mesozoic Compression and Cenozoic Extension in the 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斯山脉中发现的晚侏罗世褶皱冲断带的连续性，并将确定该构造带上可能存在多少白垩纪及更年轻的叠置。将研究中央莫哈韦第三系伸展的强度和空间分布。这项工作将集中在莫哈韦西部前第三系岩石的野外测绘、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绘、年代学和盆地分析。这些结果将有助于北美西南部的区域构造综合，并有助于描述大陆边缘造山带的构造演化过程和地壳的大规模叠加伸展。

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.