Igneous and High Temperature Hydrothermal Alteration Mineralogies in Drill-Recovered Peridotite from the Galicia Margin, Iberian Peninsula

伊比利亚半岛加利西亚边缘钻采橄榄岩的火成岩和高温热液蚀变矿物学

• 批准号: 8711075
• 负责人: Karen Kimball
• 金额: $ 10万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-11-01 至 1991-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711075&HistoricalAwards=false
• 关键词: Igneous; Temperature; Hydrothermal; Alteration; Mineralogies

This is a proposal to study the primary mineralogy and composition of an upper mantle peridotite and its subsequent alteration. The peridotite samples are obtained from a 39.5 meter section of drill core obtained during ODP Leg 103 at the Galicia Margin. The study will involve petrographic and microprobe analyses of approximately 50 thin sections cut from various parts of the core, focusing on the central and least altered peridotite, in order to characterize the alteration mineralogies and textures, and to determine relict igneous minerals. Sr isotopic analyses will be performed in an attempt to determine the age of implacement and to further characterize the alteration history of the core. Some attempt will be made to incorporate these data into a coherent tectonic picture by estimating the P- T of the alteration assemblages. Studies such as this are of fundamental importance to understanding the tectonic and thermal evolution of the oceanic crust and upper mantle, and its penetration and alteration by circulating fluids.

这是一个研究原生矿物学的建议， 上地幔橄榄岩的成分及其后续 变更。橄榄岩样品是从39.5米的 在加利西亚ODP第103航次期间获得的岩心剖面 裕度这项研究将涉及岩相学和微探针 从不同部位切下的约50个薄片的分析 核心，专注于中央和最少改变 橄榄岩，以表征蚀变矿物学 和纹理，并确定残余火成岩矿物。Sr 将进行同位素分析， 时代的不和谐，并进一步表征改变 核心的历史 我们会尝试把 这些数据通过估算P- 蚀变组合的T。 像这样的研究 对于理解地球的构造和热 大洋地壳和上地幔的演化， 通过循环流体的渗透和改变。