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Spatial and Temporal Variations in Mid-Ocean Ridge Basalt Geochemistry Along and Across the East Pacific Rise Crest, 9-10N

Spatial and Temporal Variations in Mid-Ocean Ridge Basalt Geochemistry Along and Across the East Pacific Rise Crest, 9-10N
北纬 9-10 度沿东太平洋海隆顶的大洋中脊玄武岩地球化学的时空变化
批准号：
0137325
负责人：
Kenneth Sims
金额：
$15.74万
依托单位：
Woods Hole Oceanographic Institution
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：
2002-03-15 至 2006-08-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0137325&HistoricalAwards=false
关键词：
SpatialTemporalVariationsMidOcean

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英文摘要
The PIs will measure Uranium series isotopes (230Th/238U, 226Ra/230Th, 231Pa/235U) in order to place constraints on the eruption ages of axial and off-axis lava flows in the 9-10N area of the East Pacific Rise (EPR), which has been well mapped and intensively studied with Alvin for the last decade. These U-series dates, together with new data on Sr, Nd, Pb, and Hf isotopes will be used to evaluate the petrogenesis of the samples and to evaluate the extent of near off-axis vs. axial additions to the ocean crust in this area, which seismic studies indicate should be an important process (off0axis thickening of lawer 2A). The samples will be "selected" by a "randomizing" process in order to determine theproportion of the crust that is added off-axis.
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Collaborative Research: Understanding the Processes and Timescales of Basalt Petrogenesis and Oceanic Crustal Construction at Slow-Spreading Mid-Ocean Ridges
  • 批准号：
    2317704
  • 项目类别：
    Standard Grant
  • 资助金额：
    $32.58万
  • 财政年份：
    2023
  • 负责人：
    Kenneth Sims
  • 依托单位：
    University of Wyoming
Collaborative Research: Volatile sources, eruption triggers, and magma ascent rates for mafic alkaline magmas at Nyiragongo and Nyamulagira volcanoes, DR Congo, East African Rift
  • 批准号：
    2043067
  • 项目类别：
    Standard Grant
  • 资助金额：
    $16.98万
  • 财政年份：
    2021
  • 负责人：
    Kenneth Sims
  • 依托单位：
    University of Wyoming
Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion
  • 批准号：
    1644020
  • 项目类别：
    Standard Grant
  • 资助金额：
    $7.08万
  • 财政年份：
    2017
  • 负责人：
    Kenneth Sims
  • 依托单位：
    University of Wyoming
Fe isotopes as a key to understanding fluid-rock processes during hydration of oceanic crust
  • 批准号：
    1634669
  • 项目类别：
    Standard Grant
  • 资助金额：
    $38.85万
  • 财政年份：
    2016
  • 负责人：
    Kenneth Sims
  • 依托单位：
    University of Wyoming
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