Hydrothermal Fluid Inclusions in Rocks Dredged from Mid- Ocean Spreading Centers

本项目的目的是研究大洋岩石中热液成因的高温脉中的流体包裹体。将使用标准的加热/冷冻技术对从大西洋中部海脊和西太平洋挖回的样品进行检查和分类。数据将被用来推断古代热液系统内的温度、流体成分和压力。这些结果将与岩相学和矿物化学分析相结合，确定从原始火成岩阶段到变质/交代和热液脉状的样品历史。该项目是独一无二的，因为流体包裹体技术提供了一种对次地壳海洋系统中的深部热液进行“采样”的方法。根据这一奖项进行的研究将在本科院校进行。

The objective of this project is to investigate fluid inclusions in high temperature veins of hydrothermal origin in oceanic rocks. Samples recovered by dredging from the mid- Atlantic Ridge and the western Pacific will be examined and classified using standard heating/freezing techniques. Data will be used to infer the temperatures, fluid compositions, and the pressures within the ancient hydrothermal systems. These results will be combined with petrography and mineral chemical analysis to determine the sample histories from the primary igneous stage through metamorphism/metasomatism and hydrothermal veining. The project is unique because the fluid inclusion technique provides a method of "sampling" deep hydrothermal fluids in sub-crustal oceanic systems. The research to be performed under this award will be done in an undergraduate institution.