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Collaborative Proposal: Re-Assessing Hotspot Models in the Pacific Basin with High Resolution 40Ar/39Ar Dating of Volcanic Activity in the Line Islands & Louisville Seamount Tr

Collaborative Proposal: Re-Assessing Hotspot Models in the Pacific Basin with High Resolution 40Ar/39Ar Dating of Volcanic Activity in the Line Islands & Louisville Seamount Tr
合作提案：利用莱恩群岛火山活动高分辨率 40Ar/39Ar 测年重新评估太平洋盆地热点模型
批准号：
0350991
负责人：
Anthony Koppers
金额：
$0.0万
依托单位：
University of California-San Diego Scripps Inst of Oceanography
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2004
资助国家：
美国
项目状态：
已结题
起止时间：
2004-08-01 至 2007-07-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0350991&HistoricalAwards=false
关键词：
CollaborativeProposalReAssessingHotspot

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中文摘要
翻译
【摘要】要对固定热点模型进行全盆地范围的检验，需要精确的辐射年龄，而现在只有通过改进蚀变海底玄武岩的Ar40/Ar39定年才能实现。通过重新确定现有样本的年代，研究人员将生成最先进的Ar40/Ar39年龄数据库。该项目将重新确定Line群岛和Louisville海山30-100 MA年龄范围内的37个海山的年代，并测量Hf-Sr-Nd-Pb同位素和主要/微量元素丰度，以确定这些玄武岩的地幔来源和火山活动阶段。这些数据将用于评估固定和移动热点模型。
英文摘要
ABSTRACTTo do a basin-wide test of the fixed hotspot model requires accurate and precise radiometric ages that only now have become possible through improvement in Ar40/Ar39 dating of altered submarine basalts. By re-dating existing samples the investigators will generate a state-of-the-art Ar40/Ar39 age database. This project will re-date 37 seamounts that fall within the 30-100 MA age range in the Line Islands and the Louisville seamounts incremental heating Ar40/Ar39 dating, and measure Hf-Sr-Nd-Pb isotopes and major/trace element abundances to characterize these basalts in terms of mantle source and stage of volcanic activity. These data will be used to assess the fixed and moving hotspot models.
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