Magnetic Susceptibility Variations in Cave Sediments from the Moravian Karst, Czech Republic: A Record of Environmental Change

97-05718 Diehl 来自海洋、湖泊和风吹（黄土）沉积物的铁的矿物磁性的变化已被证明反映了地球轨道、气候和人类活动的变化。 洞穴沉积物几乎没有注意到这些环境磁学研究，在许多情况下，这些沉积物包含了丰富的历史早期man. The捷克地质调查局和密歇根理工大学一直在研究摩拉维亚喀斯特洞穴沉积物在过去几年重建更新世/全新世古气候记录，这些沉积物沉积。 这项拟议的研究 专注于发现可能导致两个洞穴沉积物序列中磁化率和其他百万磁性参数变化的环境和/或人为过程的性质。 第一个序列来自洪水沉积物 Spiralka洞穴的磁化率变化记录在本节的上半部分，似乎跟踪10年平均冬季温度异常，这些温度异常是从布拉格-克莱门特的直接温度测量（过去200年）中确定的。 天文台 第二个序列由来自库尔纳洞穴入口相的黄土沉积物组成，库尔纳洞穴是一个研究得很好的考古遗址。 初步工作表明，磁化率高值可能是由冷间隔期成壤源物质侵蚀增加而不是暖间隔期原位成壤增强所控制的 的间隔 这项工作也有重要的意义，捆绑的洞穴地层学中欧（及其记录的人）在全球冰量的变化，因为库尔纳洞穴是典型的地方在中欧洞穴存款。 ***

97-05718 Diehl Variations in mineral magnetic properties of iron from marine, lake, and wind blown (loess) deposits have been shown to reflect changes in Earth's orbit, climate, and human activity. Cave sediments have gone almost unnoticed in these environmental magnetic studies and, in many instances, these sediments contain a rich history of early man. The Czech Geological Survey and Michigan Technological University have been studying the cave deposits of the Moravian Karst over the last several years to reconstruct the Pleistocene/Holocene paleoclimate record in which these sediments were deposited. This proposed research concentrates on discovering the nature of environmental and/or anthropogenic processes that may be causing variations in magnetic susceptibility and other mileral magnetic parameters in two sequences of cave sediments. The first sequence is from the floodwater deposits of Spiralka Cave where the magnetic susceptibility variations recorded in the upper part of this section appear to track the 10-year averaged winter temperature anomalies determined from direct temperature measurements (over the last 200 years) at the Prague-Klementinum Observatory. The second sequence consists of loess deposits from the entrance facies of Kulna Cave, a well-studied archeological site. Preliminary work indicates magnetic susceptibility highs are perhaps controlled by increased erosion of a pedogenic source material during cold intervals rather than by in-situ pedogenic enhancement during warm intervals. This work also has important implications for tying the cave stratigraphy of Central Europe (and its record of man) to changes in the global ice volume as Kulna Cave is the type locality for cave deposits in Central Europe. ***