The Compositional Effects of Metamorphism on Subducted Oceanic Lithosphere

变质作用对俯冲大洋岩石圈的成分影响

• 批准号: 9018996
• 负责人: Virginia Sisson
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018996&HistoricalAwards=false
• 关键词: Compositional; Effects; Metamorphism; Subducted; Oceanic

The principal investigators will attempt to determine controls of element mobility as a function of metamorphic grade by studying boron partitioning between minerals, mass balance whole-rock trace element compositions, zoning of trace elements in minerals, and correlations between trace element compositions of progressive metamorphic suites. Work will involve the identity of minerals that contain boron, and certain other trace elements, as well as whole-rock characterizations for additional fluid- mobile elements. Results will be applied to subduction zone metamorphism and the evolution of arc magmas. This research will help geologists understand important chemical processes deep within the earth.

主要研究人员将尝试通过研究矿物之间的硼分配、全岩微量元素组成的质量平衡、矿物中微量元素的分区以及渐进变质岩套的微量元素组成之间的相关性，来确定元素迁移率与变质等级的函数关系。 。 工作将涉及含有硼和某些其他微量元素的矿物的识别，以及其他流体流动元素的全岩表征。结果将应用于俯冲带变质作用和弧岩浆的演化。 这项研究将帮助地质学家了解地球深处的重要化学过程。