Mass Spectormetric Studies of U-Th Series Isotopes in MORBs and Young Seamount Basalts

MORB 和年轻海山玄武岩中 U-Th 系列同位素的质谱研究

• 批准号: 9204223
• 负责人: Alan Zindler
• 金额: $ 31.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-01 至 1994-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204223&HistoricalAwards=false
• 关键词: Mass; Spectormetric; Studies; Th; Series

The P.I.'s will continue the projects involving SIMS measurement of U-Th isotopes of oceanic basalts. They have selected two ridge segments, one from EPR and th other from MAR, with very different spreading rates for their study. Whereas the EPR segment is free of any hot spot or plume contamination, the MAR segment chosen has been effected by the Azores plume. The purpose of the proposed research is to evaluate the effects of the melting process (melt generation, magma transit times, fractional crystallization effects) and source characteristics using U-Th disequilibrium as a tool.

私家侦探的将继续涉及西姆斯的项目 大洋玄武岩U-Th同位素测量 他们有 选择两个脊段，一个来自EPR，另一个来自MAR， 有着不同的扩散率 而 EPR段没有任何热点或羽流污染，MAR 所选的部分受到亚速尔群岛羽流的影响。 目的 这项研究的目的是评估融化的影响， 过程（熔体生成，岩浆运输时间， 结晶效应）和源区特征 不平衡是一种工具。