Detailed Petrologic Studies of the Galapagos 95.5'W Propagating Rift System

该合同的目的是对通过疏浚和深潜救生船ALVIN从加拉帕戈斯西经95.5度采集的岩石进行详细的岩石学研究。扩展裂谷区，包括正常裂谷区、断裂区和过渡区。调查员还将进行一个大气压的实验，以确定洋中脊玄武岩的岩石相界对玄武岩成分的依赖性。所有岩石学数据将与所获取数据的正在进行的构造和地球物理解释相结合，以产生裂谷传播的综合岩石学和构造模型。该研究将有助于理解岩石圈板块的断裂破坏和断裂扩展，扩展断裂区岩浆的生成和演化，以及东太平洋海岭地区的地壳演化。该项目将在1887财政年度获得65 000美元的18个月支助。

The purpose of this award is to carry out a detailed petrologic study of the rocks collected by dredging and by DSRV ALVIN from the Galapagos 95.5 degrees W. propagating rift areas, which include the normal rift, the failed rift, and the transition area. The investigator will also perform 1-atmosphere experiments to determine the dependence of the petrologic phase boundaries of the mid-ocean ridge basalt to the composition of the basalts. All the petrologic data will be combined with the ongoing tectonic and geophysical interpretations of the acquired data to produce an integrated petrologic and tectonic model of rift propagation. The study will contribute to the understanding of rift failure and rift propagation in a lithospheric plate, generation and evolution of magma in a propagating rift area, and the crustal evolution of the East Pacific Ridge area. The project will be supported at $65,000 for 18 months in FY87.