Acquisition of a Superconducting Rock Magnetometer and a Field Free Room

9810773迪尔这笔赠款用于支付购买超导岩石磁强计的部分费用，并为密歇根理工大学的古磁学实验室提供无磁场空间。SRM将取代目前存在问题的旋转磁力仪，无法可靠地测量弱磁化样品。无磁场空间将优化SRM的性能，同时避免在样品存储和转移过程中获得实验室诱导的粘性磁化。在MTU增加一台SRM将能够快速分析弱磁化沉积物以及更强磁化的火成岩。目前将受益于SRM的一些项目包括：(1)研究火山灰的磁性，以协助进行火山灰对比和大气分馏；(2)从捷克共和国摩拉维亚喀斯特的洞穴沉积物中重建上更新世和全新世古环境；(3)调查夏威夷基拉韦厄火山南侧Hilina断层系统的运动速度。获得SRM后可能开展的未来项目包括：(1)调查犹他州西南部二叠纪和三叠纪岩石之间不整合的时间，(2)调查自上次冰川以来的区域气候变化，这些变化源于基韦诺半岛湖芯的磁性，以及(3)根据苏必利尔湖沉积物的长期变化和对比，对基韦诺海流进行历史研究。***

9810773 Diehl This grant provides partial support of the costs of acquiring a superconducting rock magnetometer (SRM) and field-free room for the paleomagnetics laboratory at Michigan Technological University (MTU). The SRM will replace their present spinner magnetometer that is besieged with problems and cannot be used to reliably measure weakly magnetized samples. The field free room will optimize the performance of the SRM while eliminating the acquisition of laboratory-induced viscous magnetization during storage and transfer of the samples. The addition of a SRM at MTU will allow rapid analyses of weakly magnetized sediments as well as more strongly magnetized igneous rocks. Some of the current projects that will benefit from the acquisition of the SRM include: (1) studies of the magnetic properties of volcanic ash as an aid in tephra correlation and as indicators of atmospheric fractionation, (2) the reconstruction of upper Pleistocene and Holocene paleoenvironments from cave sediments in the Moravian Karst, Czech Republic and, (3) investigations into the rates of movement along the Hilina Fault System on south flank of Kilauea Volcano, Hawaii. Future projects that will be made possible with the acquisition of the SRM include the following: (1) an investigation into the timing of the unconformity that separates Permian rocks from Triassic rocks in southwestern Utah, (2) investigations into regional climate changes since the last glaciation derived from magnetic properties of lake cores from the Keweenaw Peninsula, and (3) historical studies of the Keweenaw current based on secular variation and correlation of Lake Superior sediments. ***