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Quantification of Upper Crustal Alteration and Ridge Flank Hydrothermal Fluxes

Quantification of Upper Crustal Alteration and Ridge Flank Hydrothermal Fluxes
上地壳蚀变和脊翼热液通量的量化
批准号：
9633353
负责人：
Jeffrey Alt
金额：
$18.37万
依托单位：
Regents of the University of Michigan - Ann Arbor
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1996
资助国家：
美国
项目状态：
已结题
起止时间：
1996-12-01 至 2000-07-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633353&HistoricalAwards=false
关键词：
QuantificationUpperCrustalAlterationRidge

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英文摘要
9633353 Alt Circulation of sea water through the ocean crust has a major effect on the chemistry of the oceans. This is fairly well understood at mid-ocean ridges because the composition of the exiting fluids is known. However, off-axis venting has a larger effect on ocean chemistry but the venting is widespread and has not yet been sampled. Our only knowledge of the effect of off-axis circulation on seawater is from rocks that have been recovered by drilling. The PIs will measure the composition of minerals from drill hole and determine their abundance to estimate how much water has circulated through the crust and how it changed the crust.
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Organic Carbon in Altered Submarine Basalts: Tracing the Subsurface Biosphere and Role in the Global Carbon Cycle
Collaborative Research: Stable isotope tracers of the subsurface biosphere and its geochemical effects in oceanic ridge flank basement
The Role of Serpentinites in Subduction Recycling of Sulfur and Organic Carbon
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