Geochemical and Tectonic Studies of Accretionary Magmas and Associated Massive Sulfide Deposits: Galapagos Rift and Juan de Fuca Ridge

这一建议是岩石样品研究的继续 来自加拉帕戈斯和轴向海山热液区。 他们 我希望能整合岩石学和地球化学的研究， 玻璃、热液蚀变熔岩和矿化样品 通过挖泥船、ALVIN和Pisces IV进行回收，具有精细规模的油田 研究，包括海束，深拖摄影，磁和 电阻率测量 PI将作为项目 协调员，将在工作的所有阶段进行合作， 将对样本进行许多地球化学分析。 同位素研究将由共同研究者进行。 的 PI还将参加ALVIN潜水到南胡安 德富卡，如果它是由NOAA资助。 希望这些数据 来自一个死亡的热液系统（加拉帕戈斯）和一个非常年轻的 一个（轴向海山）将进一步限制模型 由PI开发，矿床与 热液系统是由来自小的，高的 在地下2公里深处的分馏岩浆体 海底

This proposal is a continuation of studies of rock samples from the Galapagos and Axial Seamount hydrothermal areas. They wish to integrate petrologic and geochemical studies of fresh glasses, hydrothermally altered lavas and mineralized samples recovered by dredge, ALVIN and Pisces IV with fine scale field studies including Sea Beam, deep-tow photography, magnetic and resistivity measurements. The PI will act as project coordinator, will collaborate on all phases of the work, and will perform many of the geochemical analyses on the samples. Isotopic studies will be carried out by co-investigators. The PI will also participate on an ALVIN dive to the Southern Juan de Fuca if it is funded by NOAA. It is hoped that the data from a dead hydrothermal system (Galapagos) and a very young one (Axial Seamount) will further constrain the models developed by the PI that the ore deposits are associated with hydrothermal systems that are driven by heat from small, highly fractionated magma bodies at depths of 2 km beneath the seafloor.