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Geochronological and Geochemical Studies of Recently Dredged Basalt from the Ninetyeast Ridge: Testing the Hotspot Model

Geochronological and Geochemical Studies of Recently Dredged Basalt from the Ninetyeast Ridge: Testing the Hotspot Model
最近从九十东岭挖出的玄武岩的年代学和地球化学研究：测试热点模型
批准号：
0825147
负责人：
Frederick Frey
金额：
$42.24万
依托单位：
Massachusetts Institute of Technology
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2008
资助国家：
美国
项目状态：
已结题
起止时间：
2008-09-01 至 2012-08-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0825147&HistoricalAwards=false
关键词：
GeochronologicalGeochemicalStudiesRecentlyDredged

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中文摘要
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英文摘要
The tectonic origins of the Ninetyeast Ridge (NER) will be investigated from geochrnonological/isotopic (Ar/Ar) measurements and from geochemical (Sr, Nd, Hf, and Pb isotopes) analyses of basalt samples collected from 7 DSDP and ODP drill sites, and from 23 dredged samples collected from NER in 2007. These analyses will address the origins of hotspots as the NER and if they are sourced beneath the ridge in the deep mantle or more shallow in the mid-upper mantle or sublithosphere. The data generated from this project will help advance geodynamical models of hotspots.Broader impacts: The broader impacts were viewed as limited in scope but will provide educational benefit and training for undergraduate and graduate students, and a JOI-sponsored middle school teacher.
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Collaborative Research: Geophysical, Geochemical and Geochronological Site Survey of the Ninetyeast Ridge - Testing Hotspot Hypotheses
Defining and Understanding Geochemical Heterogeneity in the Hawaiian Plume: Spatial and Temporal Geochemical Variations in Loa-trend Volcanoes
The Geochemical Characteristics of the Hawaiian Plume: Constraints From Studies of Lavas Forming the Koolau and Kahoolawe Shields
Upgrading of the Neutron Activation Analysis Facility: A Laboratory in the Massachusetts Institute of Technology Center for Geochemical Analysis
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