Quantitative Petrography and Mineralogy of Seafloor Basalts and Gabbros

本项目旨在研究Juan ridge （10-12 N）、Mid Atlantic ridge （45 N、36 N和23-26 N）、Mid cayman RIse和西南印度洋ridge的中洋脊玄武岩和空间相关辉长岩的模态相位比例、晶体尺寸分布和主微量元素组成。这是一项基线研究，此前从未在区域范围内进行过尝试。目标是将模型比例、晶体尺寸分布、主要和微量元素组成与扩散速率、脊分割、冷却历史和其他因素联系起来。这项工作代表了将岩石学特征（如模态相比例、晶体尺寸等）与海洋脊峰区域尺度上的岩石学过程联系起来的主要努力。这是岩石学中最重要的一项费时的基础工作。多年来，布莱恩博士一直是海底玄武岩研究领域的领军人物。迈耶博士是一位年轻的助理，他非常善于将现代技术应用于岩石学问题。这项工作将导致关于海洋脊顶岩浆过程的重要已知知识。

This is a project to carry out a study of modal phase proportions, crystal size distribution, and major and trace element compositions of mid-ocean ridge basalts and spatially associated gabbros from the Juan Ridge (10-12 N), and the Mid- Atlantic Ridge (45 N, 36 N, and 23-26 N), and Mid-Cayman RIse and Southwest Indian Ridge. This is a baseline study not before attempted on a regional scale. The objectives are to relate model proportions, crystal size distributions, major and trace element compositions to spreading rate, ridge segmentation, cooling history, and other factors. %%% This work represents a major effort to relate petrographic signature as seen in modal phase proportions, crystal size, etc. to petrological processes on a regional scale at ocean ridge crests. This is a time consuming, basic effort in petrology of first order importance. Dr. Bryan has been a leader in the study of ocean floor basalts for many years. Dr. Meyer is a young associate who is very adapt at applying modern techniques to petrologic problems. This work should lead to important knew knowledge regarding magmatic processes at ocean ridge crests.