Collaborative Proposal: Incorporation and Preservation of Magnesium in Planktonic Foraminifera: Implications for Mg-Paleothermometry and Calcite Solubility

该项目将研究浮游有孔虫中方解石的溶解度、水温、镁/钙和氧同位素比率之间的关系。来自大西洋和太平洋6个深度断面的单个样本将被分析地球化学变量和大小归一化质量，集中在岩芯顶部，但包括与上一次冰盛期样本的一些比较。还将考察不同的清洗技术对地球化学的影响，并将在利用电子探针、同步辐射X射线衍射和X射线吸收光谱鉴定镁元素的矿物学方面进行探索性工作。

This project will examine the relationships between calcite solubility, water temperature, Mg/Ca and oxygen isotopic ratios in planktic foraminifera. Individual specimens from 6 depth transects in the Atlantic and Pacific Oceans will be analyzed for geochemical variables and for size-normalized mass, concentrating on core tops but including some comparison with samples from the last glacial maximum. The effect of different cleaning techniques upon geochemistry will also be examined, and exploratory work witll be done on the use of electron microprobe, synchrotron X-ray diffraction and X-ray absorption spectroscopy to identify the mineralogy of Mg incorporation.