Mantle Peridotites from the Ocean Basins: Petrology and Geochemistry

大洋盆地幔橄榄岩：岩石学和地球化学

• 批准号: 8901587
• 负责人: Enrico Bonatti
• 金额: $ 17.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1993-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8901587&HistoricalAwards=false
• 关键词: Mantle; Peridotites; Ocean; Basins; Petrology

The principal objective of this project is to define regional variations of upper mantle composition in the Atlantic and explain them in terms of P-T conditions of equilibration, partial melting and initial heterogeneity. The research program involves both whole rock analyses using emission plasma spectrometry, XRF, and neutron activation as well as mineral analyses using electron and ion probe analyses for major and trace elements. The analytical work on peridotite samples recently acquired from the north Atlantic will refine correlations of geoid height and crustal depth with North Atlantic peridotite chemistry. %%% Understanding of upper mantle geochemical variations is fundamental to a complete understanding of petrogenesis of the midocean ridge basalts which are derived from the peridotites. The PI is recognized as a leader in the study of oceanic peridotite geochemistry, and this project will be a valuable contribution to our understanding of the chemical variation in the source rocks from which oceanic crust is derived.

该项目的主要目标是确定 大西洋上地幔成分的区域变化 用平衡的P-T条件来解释 部分熔融和初始异质性。研究计划 包括使用发射等离子体的整个岩石分析 光谱法、XRF和中子活化以及矿物 使用电子和离子探针分析， 微量元素 橄榄岩样品的分析工作 最近从北大西洋获得的将提炼 大地水准面高度和地壳深度与北 大西洋橄榄岩化学 %%% 对上地幔地球化学变化的认识， 对岩石成因的完整理解的基础 由橄榄岩衍生而来的密西期脊玄武岩。 PI被公认为海洋研究的领导者 橄榄岩地球化学，这个项目将是一个有价值的 有助于我们理解 洋壳形成的源岩。