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Collaborative Research: 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 Research: Re-Assessing Hotspot Models in the Pacific Basin With High Resolution 40Ar/39Ar Dating of Volcanic Activity in the Line Islands & Louisville Seamount Tr
合作研究:利用莱恩群岛火山活动的高分辨率 40Ar/39Ar 测年重新评估太平洋盆地的热点模型
批准号:
0351412
负责人:
Robert Duncan
金额:
$6.25万
依托单位:
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

项目摘要

项目成果

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中文摘要
翻译
要对固定热点模型进行全盆地范围的测试,需要准确和精确的放射性年龄,只有通过改进蚀变海底玄武岩的Ar 40/Ar 39定年,才有可能实现。 通过重新测定现有样本的年龄,研究者将生成最先进的Ar 40/Ar 39年龄数据库。 该项目将对莱恩群岛30-100万年年龄范围内的37座海山和路易斯维尔海山的增量加热Ar 40/Ar 39测年进行重新定年,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
To 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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REU Site: Summer Intensive Research Experiences in Neuroscience (SIREN)
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  • 财政年份:
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  • 批准年份:
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  • 负责人:
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  • 依托单位:
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