Experimental investigation of the redox conditions at which carbonate minerals and melts transform to graphite or diamond in Earths mantle
地幔中碳酸盐矿物和熔体转变为石墨或金刚石的氧化还原条件的实验研究
基本信息
- 批准号:164294283
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2010
- 资助国家:德国
- 起止时间:2009-12-31 至 2010-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The redox state of the Earth’s interior will influence the speciation of volatile elements both in the mantle and in mantle-derived magmas. Carbon is one of the principal elements to be affected in this way because under reducing conditions it forms graphite or diamond, and under oxidising conditions carbonate (or CO2-bearing) minerals and melts. In a series of high pressure and temperature experiments we will study the redox conditions under which this oxidation process occurs, thus mapping out the stability fields of carbon-bearing species in the mantle. We will study this oxidation process both in peridotitic and eclogitic bulk compositions. Several studies have indicated that the mantle may become more reduced with depth. This means that the oxidation of elemental carbon (graphite or diamond) may occur in up welling rocks where the oxidised product is a carbonate bearing magma. We will focus on this “redox melting” process, which may mark the onset of melting in the mantle and control the melt fraction at which melting commences. Similarly we will study the reduction of carbonate minerals with increasing depth in subduction zones, and particularly within subducted oceanic crust, which may have a direct influence over the residence time of carbon in the mantle.
地球内部的氧化还原状态将影响地幔和幔源岩浆中挥发性元素的形态。碳是以这种方式受到影响的主要元素之一,因为在还原条件下它形成石墨或金刚石,在氧化条件下形成碳酸盐(或含CO2)矿物和熔体。在一系列的高温高压实验中,我们将研究这种氧化过程发生的氧化还原条件,从而绘制出地幔中含碳物种的稳定场。我们将在橄榄岩和榴辉岩的整体组成中研究这种氧化过程。一些研究表明,地幔可能会随着深度的增加而减少。这意味着元素碳(石墨或金刚石)的氧化可能发生在上涌岩石中,氧化产物是含碳酸盐的岩浆。我们将集中在这个“氧化还原熔融”的过程中,这可能标志着在地幔熔融的开始,并控制熔融开始的熔融分数。同样,我们将研究碳酸盐矿物在俯冲带中随着深度增加而减少,特别是在俯冲洋壳内,这可能对碳在地幔中的停留时间产生直接影响。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr. Daniel J. Frost其他文献
Professor Dr. Daniel J. Frost的其他文献
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{{ truncateString('Professor Dr. Daniel J. Frost', 18)}}的其他基金
Identifying the mechanism for the early oxidation of the Earths interior
确定地球内部早期氧化的机制
- 批准号:
277057085 - 财政年份:2015
- 资助金额:
-- - 项目类别:
Priority Programmes
The phase relations of mafic rocks within the Earths mantle and geobarometers for eclogite and pyroxenite rocks to conditions of the Earths transition zone.
地幔内镁铁质岩石的相关系以及榴辉岩和辉石岩岩石的地质气压计与地球过渡带条件的关系。
- 批准号:
264531645 - 财政年份:2014
- 资助金额:
-- - 项目类别:
Research Grants
Systematics of the post-spinel tranisition in Fe-bearing compositions
含铁组合物中尖晶石后转变的系统学
- 批准号:
24942365 - 财政年份:2006
- 资助金额:
-- - 项目类别:
Priority Programmes
Stability and structures of hydrous minerals in the transition zone of the Martian mantle
火星地幔过渡带含水矿物的稳定性和结构
- 批准号:
18243496 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Priority Programmes
Experimental determination of mantle rheology
地幔流变学的实验测定
- 批准号:
5412547 - 财政年份:2004
- 资助金额:
-- - 项目类别:
Research Grants
Melting of peridotite at lower mantle conditions
下地幔条件下橄榄岩的熔化
- 批准号:
5343244 - 财政年份:2001
- 资助金额:
-- - 项目类别:
Priority Programmes
Fluid permeability and speciation in subduction zones
俯冲带的流体渗透率和形态
- 批准号:
539187065 - 财政年份:
- 资助金额:
-- - 项目类别:
Research Grants
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