Acquisition of a Sensitive Magnetic Susceptibility/Anisotropy System for Investigating Red Bed Inclination Shallowing

这笔拨款为里海伊大学古磁学实验室获得敏感磁化率/各向异性系统的费用提供部分支持。里海大学的磁化率/各向异性系统的增加将允许PI （Kodama）和他的研究生对磁化率和磁化率的各向异性（AMS）进行敏感测量。这些数据对于红层中赤铁矿携带的化学残余磁化（CRM）的倾斜度识别和校正技术的发展具有重要意义。对天然红层样品和实验室生产的质谱的详细AMS测量将与剩余物各向异性测量结合使用，以确定AMS与剩余物各向异性之间的经验和测试理论关系。这些结果将用于了解在中亚的第三纪和白垩纪红层中观测到的异常浅斜的原因。AMS测量对于最近在温哥华开始的纳奈莫组沉积物的研究也很重要。这些岩石中异常浅的倾斜被用来支持下不列颠哥伦比亚省关于北美西部边缘主要地壳运动的假说。＊＊＊

9807099 Kodama This grant provides partial support for the cost of acquiring a sensitive magnetic susceptibility/anisotropy system for the paleomagnetics laboratory at Lehigh University. The addition of the susceptibility/anisotropy system at Lehigh University will allow sensitive measurements of magnetic susceptibility and anisotropy of magnetic susceptibility (AMS) by the PI (Kodama) and his graduate students. These data will be important for developing a technique to identify and correct inclination shallowing of chemical remanent magnetizations (CRM) carried by hematite in red beds. Detailed AMS measurements of natural red bed samples and CRMs produced in the laboratory will be used in conjunction with remanence anisotropy measurements to determine empirical and test theoretical relationships between AMS and remanence anisotropy. The results will be used to understand the cause of anomalously shallow inclinations observed in Tertiary and Cretaceous red beds from central Asia. AMS measurements will also be important to a study initiated recently of the Nanaimo Group sediments in Vancouver. The anomalously shallow inclinations in these rocks have been used to provide support for the Baja British Columbia hypothesis of major terrane motions along the western margin of North America. ***