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Collaborative Research: Assessing Hotspot Fixity in the Pacific Basin

Collaborative Research: Assessing Hotspot Fixity in the Pacific Basin
合作研究：评估太平洋盆地的热点固定性
批准号：
0002875
负责人：
Robert Duncan
金额：
$11.55万
依托单位：
Oregon State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2001
资助国家：
美国
项目状态：
已结题
起止时间：
2001-01-15 至 2003-12-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002875&HistoricalAwards=false
关键词：
CollaborativeResearchAssessingHotspotFixity

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中文摘要
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英文摘要
This study will conduct a survey along the Easter/Salas-y-Gomex/ Nazca (ESN) trail tobetter characterize and constrain movement of the hotspot over the last 25 to 30 Ma. The survey will involve geochronologic, geochemical, and geophysical study of seamounts and volcanic ridges. Multibeam bathymetric data and backscatter imagery will be used to define topography and structural features at selected localities and identify targets for dredging. Dredged samples will be dated using 40Ar-39Ar technique and their petrological, chemical and Nd-Pb-Sr isotopic chracteristics will be determined. The new data will be combined with re-analyses of existing samples to test Nazca-hotspot motion and mantle flow models and compare them to Pacific-hotspot models.
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