Geochemical Studies of Ocean Basin Evolution

私家侦探对同位素进行了重要的研究， EPR（9o30'N，13p30'-15oN），MAR（36oN）， 戈尔达岭、总统杰克逊海山、S.大西洋热 现场跟踪。 他现在希望继续这一努力， 太平洋和大西洋玄武岩中微量元素丰度 目的是确定源成分的特征， 两个山脊系统中的岩浆过程， 不同的传播速度。 此外，他将分析零年龄 和EPR地区的一些较老的玄武岩，以评估 引起岩浆地球化学时间变化的过程 沿着EPR演化。 当前的一个重要推动力 项目是确定铀，钍和铅的丰度 来自EPR、FAMOUS和一些大洋岛屿地区的大洋玄武岩。 的 目的是研究地幔柱的U/Pb和Th/U比值 相对于耗尽的N-MORB储层。 这个项目的最终目标 项目是量化地幔源的地球化学模型 （羽流、枯竭的储层）和影响地壳的过程 在大洋中脊形成。

The P.I. has carried out significant research on isotope and trace element geochemistry of EPR (9o30'N, 13p30'-15oN), MAR(36oN), the Gorda Ridge, President Jackson Seamounts, & S. Atlantic hot spot tracks. He now wishes to continue this effort and analyze trace element abundances in basalts from both Pacific and Atlantic oceans with the objective of characterizing source compositions and magmatic processes in the two ridge systems that have very different spreading rates. Additionally, he will analyze zero age and somewhat older basalts from the EPR area in order to evaluate the processes which cause temporal geochemical variations in magma evolution along the EPR. An important thrust of the present project is the determination of the U, Th and Pb abundances of oceanic basalts from EPR, FAMOUS, and some ocean island areas. The purpose is to characterize U/Pb and Th/U ratios of mantle plumes vs. the depleted N-MORB reservoir. The ultimate goal of this project is to quantify geochemical models of mantle sources (plumes, depleted reservoirs) and the processes which affect crust formation at mid-oceanic ridges.