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

这项提议要求资金支持一项高压实验研究计划，该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)和稀有高镁玄武岩(HMB)之间是否存在可信的成岩联系。在这项提案中，描述了一种双管齐下的实验方法，这将为研究HAB和HMB之间的关系(如果有的话)提供重要的新见解。这些实验要回答的重要问题是，在HMB的熔融间隔内，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)形成的了解。火山学。

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.