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Precise U-Pb Dating of Plinian-Eruption Ashfalls for the Purpose of Time-Scale Calibration and Biostratigraphic Correlation

Precise U-Pb Dating of Plinian-Eruption Ashfalls for the Purpose of Time-Scale Calibration and Biostratigraphic Correlation
普林尼式火山喷发灰烬的精确 U-Pb 测年,用于时间尺度校准和生物地层相关性
批准号:
9219941
负责人:
Robert Tucker
金额:
$5.2万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1993
资助国家:
美国
项目状态:
已结题
起止时间:
1993-07-01 至 1996-12-31

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英文摘要
PI will perform U-Pb (uranium-lead) dating of single-crystals and small multigrain fractions of phenocrystic zircon from well- characterized K-bentonites (ancient volcanic ash beds) in the Ordovician and Silurian stratotypes of Sweden, Britain and the central United States for the purpose of precise time-scale calibration and biostratigraphic correlation. The proposed research will produce an internally consistent and accurate absolute chronology of the Middle Ordovician through Upper Silurian stratotypes of Britain,and permit direct comparison of coeval but different fauna in North America, Scandinavia and the United Kingdom.
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Collaborative Research: Neoproterozoic Vergence in the East African Orogen: A Structural and Geochronologic Analysis of the Polydeformed Itremo Group, Central Madagascar
  • 批准号:
    0207856
  • 项目类别:
    Standard Grant
  • 资助金额:
    $12.97万
  • 财政年份:
    2002
  • 负责人:
    Robert Tucker
  • 依托单位:
Collaborative Research: Investigation of a Proposed Suture Between East and West Gondwana -- An Integrated Field, Geochronologic, and Remote-Sensing Analysis in East Madagascar
  • 批准号:
    0125957
  • 项目类别:
    Standard Grant
  • 资助金额:
    $3.99万
  • 财政年份:
    2002
  • 负责人:
    Robert Tucker
  • 依托单位:
COLLABORATIVE RESEARCH: Integrated Analysis of the Neoproterozoic Vindhychal Basin, India
  • 批准号:
    0087459
  • 项目类别:
    Standard Grant
  • 资助金额:
    $2.73万
  • 财政年份:
    2001
  • 负责人:
    Robert Tucker
  • 依托单位:
Neoproterozoic Crust Formation and Terrane Suturing in the East African Orogen: Geological, Geochemical, and Geochronological Investigations in Madagascar
  • 批准号:
    9814373
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $18.0万
  • 财政年份:
    1999
  • 负责人:
    Robert Tucker
  • 依托单位:
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  • 批准号:
    JCZRYB202501278
  • 项目类别:
    省市级项目
  • 资助金额:
    --
  • 批准年份:
    2025
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成型PB-生物炭吸附水体中铊的尺寸限域效应及选择性去除机制
  • 批准号:
    2025JJ50254
  • 项目类别:
    省市级项目
  • 资助金额:
    --
  • 批准年份:
    2025
  • 负责人:
    余江芳
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