Acquisition of an ICP - MS for the Large Lakes Observatory

9601577布朗这笔赠款提供136,000美元，作为购买电感耦合等离子体质谱仪(电感耦合等离子质谱仪)的部分费用，用于明尼苏达大学德卢斯分校大湖区观测站的湖泊学和古气候学研究中的痕量元素和同位素比率分析。具体研究将集中在人类活动对苏必利尔湖沉积物中重金属(特别是铅和铜)分布及其成岩再动员的影响，以及氧化还原敏感金属、介形虫测试中的痕量金属比值(即镁/钙、锶/钙)的研究，以及作为气候和物源变化指标的东非裂谷湖沉积物岩屑中的铅和锶同位素变化。该仪器将为环境样品的痕量元素分析提供新的区域能力，并将使从事湖沼学和地球化学研究的本科生和研究生受益。***

9601577 Brown This grant provides $136,000 as partial support of the costs of acquiring an inductively coupled plasma mass spectrometer (ICP-MS) for trace elemental and isotopic ratio analyses for studies in limnology and paleoclimatology at the University of Minnesota - Duluth, Large Lakes Observatory. Specific research will focus on anthropogenic influences on heavy metal (particularly Pb and Cu) distributions and their subsequent diagenetic remobilization in sediments of Lake Superior and studies of redox sensitive metals, trace metal ratios (i.e. Mg/Ca, Sr/Ca) in ostracode tests and the Pb and Sr isotopic variations found in lithic fragments from East African Rift Lake sediments as proxies of climatic and provenance changes over time. This instrument will provide a new regional capability for trace elemental analyses of environmental samples and will benefit undergraduate and graduate students conducting limnological and geochemical research. ***