Collaborative Research: Tracing Paleoceanographic Sources of Fe to the Central Pacific Ocean
Collaborative Research: Tracing Paleoceanographic Sources of Fe to the Central Pacific Ocean
批准号:
0136855
负责人:
Richard Murray
金额:
$10.9万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2002
资助国家:
美国
项目状态:
已结题
起止时间:
2002-06-01 至 2006-12-31
中文摘要
摘要:本提案要求支持进行一项全面的化学和同位素调查(常量、微量和稀土元素以及锶、钕和铅同位素),以检验这样一种假设,即进入赤道中部太平洋表层水域的颗粒态铁的来源是通过向东流动的赤道暗流(EUC)的巴布亚新几内亚地区。此外,这项研究还将评估在北纬40度和南纬5-20度的情况下,风吹物质作为颗粒铁的来源是否比来自PNG的铁更重要。这项研究将通过冰川-间冰期旋回检查来自EUC来源的铁在岩心下部的变化,并检查这些变化是否与沉积物中记录的出口产量的变化有关。
英文摘要
Summary: This proposal request support for a comprehensive chemical and isotopic survey (major, trace, and rare earth elements along with Sr, Nd and Pb isotopes) to test the hypothesis that the source of particulate Fe to central equatorial Pacific surface waters is the Papua New Guinea region via the eastward flowing Equatorial Undercurrent (EUC). In addition the study will assess whether wind blown material is more important as a source of particulate Fe at 4oN and 5-2oS than is PNG-derived Fe. The study will examine downcore variations in the EUC-sourced Fe through glacial-interglacial cycles, and examine whether changes can be correlated with changes of export production recorded in the sediments.
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