Sampling Basalts in the Quebrada-Discovery-Gofar Transform Fault System: Testing Models of Mantle Flow and Melt Transport

0527152 Forsyth摘要PI将研究和量化Quebrada/Discovery/Gofar断裂带系统快速扩展EPR下方的地幔流、熔体产生、熔体路径和地幔异质性。他们将通过测绘、取样变换内扩张中心和邻近的洋中脊扩张中心以及巡航后分析玄武岩的主要和微量元素以及Sr、Nd、Pb和Th同位素组成来实现这一目标。地球化学结果将与熔融模型预测和该地区观测到的地球物理学进行比较。这项研究将在一个连贯的地球物理/地球动力学框架内提供一套完整的地球化学数据，从而能够解决洋中脊下地幔和熔体动力学的若干基本问题，该奖项将资助一名年轻研究员和两名研究生的工作。计划中的海上本科生项目是另一个创新的更广泛的教育影响。

0527152ForsythAbstractThe PIs will study and quantify mantle flow, melt production, melt path and mantle heterogeneity beneath the fast spreading EPR at the Quebrada/Discovery/Gofar fracture zone system. They will accomplish this by mapping, sampling intra-transform spreading centers and adjacent mid-ocean ridge spreading centers and post cruise analysis of the basalts for major and trace element, and Sr, Nd, Pb and Th isotopic composition.. The geochemical results will be compared to melting model predictions and the observed geophysics of the region. The study will provide a complete geochemical data set within a coherent geophysical/geodynamics framework that will allow addressing several fundamental questions of mantle and melt dynamics beneath mid-ocean ridges.The award will fund the work of a young investigator and two graduate students. A planned undergraduate student program at sea is another innovative broader educational impact.