MRI: Acquisition of a Multi-Sensor Core Logger, Pycnometer, C:N Analyzer, and Freeze Dryer for use in Lake and Paleoclimate Studies at Middlebury College

0922940 munroe主要研究仪器（MRI）拨款将用于购买设备，用于米德尔伯里学院地质学系的古湖泊学和古气候研究，这是一所本科院校。购买的具体设备包括碳/氮（CN）分析仪、体积计、冷冻干燥机和取心系统。CN分析仪将用于测量湖泊沉积物样品中陆源和水生有机质的相对贡献，并确定土壤中有机质的组成和分解程度。体积计将用于对囊状沉积物样品进行精确的体积密度测定。冷冻干燥机将用于制备样品进行碳/氮分析，使用其他现有设备进行生物硅和矿物磷分析，并用于干燥样品以稳定存档。这些仪器将支持地质学系三名教员的研究和研究培训计划，包括基于湖相和海洋沉积档案中记录的代用物研究晚第四纪古气候，以及研究气候控制对土壤发育的影响。

0922940MunroeFunds from this Major Research Instrumentation (MRI) grant will support the acquisition of equipment to for use in paleolimnology and paleoclimate studies in the Geology Department at Middlebury College, an undergraduate institution. Specific equipment to be acquired will include a Carbon/Nitrogen (CN) analyzer, a pycnometer, a freeze-dryer, and a coring system. The CN analyzer will be used to gauge the relative contribution of terrestrial and aquatic organic matter in lacustrine sediment samples, and to determine the makeup and extent of decomposition of organic matter in soils. The pycnometer will be used to make accurate bulk density determinations for vesicular sediment samples. The freeze-dryer will be used to prepare samples for carbon/nitrogen analysis, for biogenic silica and mineral phosphorous analysis using other currently available equipment, and for drying samples for stable archiving. The instruments will support the research and research training programs of three faculty members in the Department of Geology including studies of late Quaternary paleoclimate based on proxies recorded in lacustine and marine sedimentary archives and studies of climatic controls on soil development.