Experimental Studies of the Interrelationship Between High-Al and High-Mg Subduction-related Basalts

该提案要求资助一项高压实验研究计划，旨在评估在大多数岛弧环境中发现的大量高铝玄武岩（HAB）和罕见的高镁玄武岩（HMB）之间是否存在似是而非的岩石成因联系。在这个提议中，描述了一个双管齐下的实验方法，这将为HAB和HMB之间的关系（如果有的话）提供重要的新见解。从这些实验中需要回答的重要问题是，在HMB的熔化区间内，HAB熔体是否与橄榄石（+/-其他相）共存。这项研究将增加我们对重要岛弧（如日本、阿留申群岛等）火山形成的认识。

This proposal requests funding to support a high-pressure experimental research program designed to evaluate whether a plausible petrogenenetic link exists between the voluminous high- alumina basalts (HAB) and the rare high-magnesia basalts (HMB) found in most island arc settings. In this proposal, a two- pronged experimental approach is described that will provide important new insight into the relationship (if any) between HAB and HMB. The important question to be answered from these experiments is whether HAB melt coexists with olivine (+/- other phases) anywhere within the melting interval of the HMB. The study will increase our understanding of the formation of the important island arc (e.g. Japan, Aleutians, etc.) volcanics.