Hotspot Volcanism and the Role of the Oceanic Lithospheric Mantle - An Integrated Geochemical Case Study

PIs正在研究西印度洋的大科摩罗岛，以测试浅层岩石圈地幔对海洋岛屿火山作用的重要性。pi表明，盾构熔岩的同位素变化反映了地幔柱与岩石圈的相互作用。pi将通过分析He和Os同位素来扩展他们的研究，并通过对地幔源捕虏体的地球化学和同位素研究，直接表征大科摩罗岩石圈地幔的同位素组成。他们将把这项研究扩展到科摩罗群岛的古老岛屿。

9725681 Goldstein The PIs are studying the Grande Comore Island, in the western Indian ocean, to test the importance of shallow level lithospheric mantle contributions to oceanic island volcanism. The PIs have shown that the isotopic variations of the shield building lavas reflect plume-lithosphere interactions. The PIs will extend their study by analyzing He and Os isotopes and directly characterize the isotopic composition of the lithospheric mantle beneath the Grande Comore, through a geochemical and isotopic study of mantle derived xenoliths. They will extend the study to the older islands of the Comores Archipelago.