Geochemical and Tectonic Accretionary Processes along the Eastern Galapagos Rift and Juan De Fuca Ridge

提供的资金用于继续对东加拉帕戈斯裂谷和胡安德富卡岭南部进行地球化学和构造调查，包括：轴向火山、胡安德富卡岭的裂隙和万斯段以及万斯海山链。将完成对1988年AII/Alvin邮轮期间从加拉帕戈斯群岛取回的样本的研究。Pi还将参加1990年沿南部JDF山脊的实地方案。这些调查的结果与现有的地球物理和地质数据相结合，将为建立沿这些海脊段及其相关海山发生的构造岩浆和热液过程的综合模型奠定基础。这些研究包括熔岩类型及其地貌；大洋中游玄武岩的化学变异性以及岩浆混合、晶体分馏和地壳同化作用；轴向火山和海山熔岩的化学特征和大岩浆室过程。

Funds are provided to continue geochemical and tectonic investigations of the eastern Galapagos Rift and southern Juande Fuca Ridge including: Axial volcano, the Cleft and Vance segments of the Juan de Fuca Ridge (JDF) and the Vance seamount chain. Studies on samples from the Galapagos recovered during a 1988 AII/ALVIN cruise will be completed. PI will also participate in a 1990 field program along the southern JDF Ridge. The results of these investigations, integrated with available geophysical and geological data, will provide the basis for comprehensive models of the tectonomagmatic and hydrothermal processes that occur along these ridge segment sand their associated seamounts. These studies include the lava types and their marphology; chemical variability of Mid Ocean Ride Basalts and the role of magma mixing, crystal fractionation and crustal assimitation; chemical characteristic of axial volcano and seamount lavas and magna chamber processes.