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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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中文摘要
翻译
小行星9633353 海水在洋壳中的循环对海洋的化学性质有重大影响。在大洋中脊，这一点是相当清楚的，因为流出流体的成分是已知的。然而，离轴排气对海洋化学有较大影响，但排气很普遍，尚未取样。关于离轴环流对海水的影响，我们唯一的了解是来自于通过钻井回收的岩石。PI将测量钻孔中的矿物成分，并确定其丰度，以估计有多少水在地壳中循环，以及它如何改变地壳。
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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Serpentinization processes in the subsurface of a seafloor ultramafic-hosted hydrothermal system
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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