Quantitative Logging of Alteration and Veins in Drillcore from Hole 504B

该项目寻求支持，以量化和编码在大洋钻探方案504b孔的岩心材料和记录中观察到的构造、火成岩和变质/蚀变特征的测量结果。在海底深度刚刚超过2公里的504b是洋壳中最深的钻孔，也是唯一一个采样枕状玄武岩/席状岩脉过渡的钻孔。这口井已经通过六(6)个钻井柱和钻井柱成功地钻深了。PI在最近的140号腿上开始了详细描述结构和岩石学特征的任务。他的初步工作表明，矿脉丰度和次生矿物等特征可能存在显著的趋势和/或周期。PI现在希望通过检查和描述前五(5)个钻井腿中的核心材料来扩展这项工作。这项研究的目的是提供这一重要的大洋地壳参考剖面的标准和更详细的描述记录，并确定井下存在的构造和岩石学特征的总体趋势和旋回。这些信息反过来将为洋壳的形成过程以及洋壳的二次热液改造过程提供洞察。

This project seeks support to quantify and codify measurements of structural, igneous, and metamorphic/alteration features observed in core materials and logs of Ocean Drilling Program Hole 504B. At just over 2 kilometers sub-seafloor depth, 504B is the deepest borehole in ocean crust, and the only one that samples the pillow basalt/sheeted dike transition. This borehole has been successfully deepened through six (6) DSDP and ODP legs. PI began the task of detailed description of structural and petrologic features on the most recent, Leg 140. His initial work shows that significant trends and/or cycles in such features as vein abundance and secondary minerals may exist. PI now wishes to extend this work through examination and description of core materials from the previous five (5) drilling legs. The goals of this research are to provide a standard and more detailed descriptive log of this important ocean crustal reference section, and to determine what overall trends and cycles in structural and petrologic features exist down hole. This information, in turn, will provide insights to processes of ocean crust formation, as well as processes of secondary hydrothermal alteration of ocean crust.