Platinum Group Elements in Layered Intrusions and Submarine Glasses

这一建议包括三个部分：(1)将测量海底玄武岩中硫化物颗粒和共存玻璃(=淬火液体)之间的选定元素的分布，以评估矿物熔体的分配效应；(2)Os同位素数据将被用来评估两个含PGE的超镁铁质侵入体侵位后开放系统行为的程度--这项研究将评估热液作用在PGE重新分布中的重要性；(3)将对一个含PGE的岩体进行详细的岩石学和矿物学研究，以确定为什么PGE矿物学在该岩体内发生系统变化。

This proposal involves a three-part investigation of the behavior of platinum group elements (PGE's) in magmatic and hydrothermal environments: (1) the distribution of selected elements will be measured between sulfide globules and coexisting glass (=quenched liquid) in submarine basalts to evaluate mineral- melt partitioning effects; (2) Os isotopic data will be used to evaluate the extent of open-system behavior following emplacement of two PGE-bearing ultramafic intrusions - this study will assess the importance of hydrothermal processes in redistributing PGE's; (3) Detailed petrographic and mineralogic studies will be carried out on one PGE-bearing body to determine why PGE mineralogy varies systematically within this body.