The Effects of Variable Peridotite Mode and Compositional Fertility on the Stoichiometry of Near-solidus Mantle Melting Reactions

可变橄榄岩模式和成分肥度对近固相线地幔熔融反应化学计量的影响

• 批准号: 9506045
• 负责人: A. Dana Johnston
• 金额: $ 14.09万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506045&HistoricalAwards=false
• 关键词: Effects; Variable; Peridotite; Mode; Compositional

9506045 Johnston This project involves a three-year experimental research program on the near-solidus melting behavior of a range of peridotites, varying both the compositional fertility of their constituent minerals and the modal abundances of these minerals. A specific focus will be determining the stoichiometry of the solidus reaction for different peridotites and the manner in which the stoichiometry of the melting reaction changes at super-solidus temperatures. The study will involve various combinations of pure mineral separates from natural peridotite xenoliths, with several mixtures intentionally enriched in spinel and/or clinopyroxene to enhance the signal imparted by these phases on the melting process. the near-solidus melting behavior of these mixtures will then be investigated using the diamond aggregate experimental technique.

9506045约翰斯顿该项目涉及一个为期三年的实验研究计划，对一系列橄榄岩的近固相线熔融行为，改变其组成矿物的组成肥力和这些矿物的模态丰度。 一个具体的重点将是确定不同的橄榄岩的固相线反应的化学计量和熔融反应的化学计量在超固相线温度的变化方式。 这项研究将涉及从天然橄榄岩捕虏体中分离出的纯矿物的各种组合，以及有意富集尖晶石和/或单斜辉石的几种混合物，以增强这些相对熔融过程的信号。 然后将使用金刚石聚集体实验技术研究这些混合物的近固相线熔化行为。