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tarium and Phosphorus Cycling in Marine Sediments: Mineral Phase Transformations and Burial in the S.E. Pacific

tarium and Phosphorus Cycling in Marine Sediments: Mineral Phase Transformations and Burial in the S.E. Pacific
海洋沉积物中钍和磷的循环：东南部矿物相变和埋藏
批准号：
9617929
负责人：
James McManus
金额：
$24.78万
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：
1997
资助国家：
美国
项目状态：
已结题
起止时间：
1997-01-01 至 1999-12-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617929&HistoricalAwards=false
关键词：
tariumPhosphorusCyclingMarineSediments

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中文摘要
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英文摘要
9617929 McManus This project will examine the effects of early diagenesis upon two elements (Ba and P) often used as tracers for past ocean production. The PIs hypothesize that Ba preservation is related to the degree of oxygen penetration into the sediment, and propose to use a redox sensitive element such as U as an independent tracer of sediment oxidation state. P preservation is hypothesized to be dependent upon both sediment oxidation and the presence of Fe oxides. The PIs will collect solid and fluid phases in sediment cores from the southeast Pacific and Chile continental margin spanning a wide range of oxidation states and sediment types. Species to be analyzed include Ba, P, U, Cd, SO4, C1, F, Mn, Fe, PO4, NH4, NO3 and O2.
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Collaborative Research: Investigation of paired uranium and chromium isotope behavior during authigenic metal uptake into continental margin sediments
Expedition Objective Research (IODP Expedition 340): Diagenesis in tephra-rich marine sediments and the impact of reactive iron on enhanced carbon burial
Expedition Objective Research (IODP Expedition 340): Diagenesis in tephra-rich marine sediments and the impact of reactive iron on enhanced carbon burial
  • 批准号：
    1259326
  • 项目类别：
    Standard Grant
  • 资助金额：
    $15.0万
  • 财政年份：
    2013
  • 负责人：
    James McManus
  • 依托单位：
    Oregon State University
Expedition Objective Research (IODP Expedition 340): Diagenesis in tephra-rich marine sediments and the impact of reactive iron on enhanced carbon burial
  • 批准号：
    1360077
  • 项目类别：
    Standard Grant
  • 资助金额：
    $15.0万
  • 财政年份：
    2013
  • 负责人：
    James McManus
  • 依托单位：
    University of Akron
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