Acquisition of an ICP - MS for the Large Lakes Observatory

小行星9601577 这笔赠款提供了136 000美元，作为明尼苏达大学-杜卢斯大湖观测站购置电感耦合等离子体质谱仪（ICP-MS）的部分费用，用于湖沼学和古气候学研究的微量元素和同位素比率分析。 具体研究将侧重于人类活动对重金属的影响苏必利尔湖上级沉积物中Pb和Cu的分布及其随后的成岩再活化作用以及氧化还原敏感金属、痕量金属比值的研究（即Mg/Ca，Sr/Ca）在介形虫试验中，东非裂谷湖沉积物岩屑中发现的Pb和Sr同位素变化作为气候和来源会随着时间而改变 这一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. ***