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fluids in the mantle
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  相似匹配句对
     Study of magnetorheological fluids
     磁流变液的特性研究
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     Magnetorheological Fluids and Its Applications
     磁流变液及其应用
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     Molecular Thermodynamics of Fluids
     流体分子热力学
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     FLUIDS IN THE SEDIMENTARY BASIN
     沉积盆地中的流体
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     Advances in Electrorheological Fluids
     电流变液体的研究进展
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  fluids in the mantle
His earlier research focused on fluids in the mantle and lithosphere, primarily at convergent boundaries.
      


This paper gives a reviw on the major results from the recent research on the petrology and geochemistry of mantle rock in China, with key discusion on the important role of mantle fluid in the mantle process, especially on the ore-forming process of mantle fluid, the regional geochemical charecteristics of mantle beneath the continent in eastern part of China and its dynamic significance.

本文概述了近年来我国在地幔岩石学和地球化学研究中取得的主要结果。重点讨论了地幔流体在地幔过程中的重要作用,特别是地幔流体成矿作用,我国东部陆下地幔化学的区域性特征及其动力学意义。

The Earth differentiates more and more strongly during its degassing, the main forms of the Earth degassing are volcanic/magmatic processes. There are a lot of fluids presented in the mantle rocks, which mainly in the form of fluid inclusion. Almost all minerals formed in the mantle conditions contain fluid inclusions. Such fluid is mainly consisted of CO 2,CH 4,H 2O, H 2, and N 2 etc. Kimberlite magma is generated during the reaction process between the mantle rocks...

The Earth differentiates more and more strongly during its degassing, the main forms of the Earth degassing are volcanic/magmatic processes. There are a lot of fluids presented in the mantle rocks, which mainly in the form of fluid inclusion. Almost all minerals formed in the mantle conditions contain fluid inclusions. Such fluid is mainly consisted of CO 2,CH 4,H 2O, H 2, and N 2 etc. Kimberlite magma is generated during the reaction process between the mantle rocks and the mantle fluids. Both the mantle fluids and the melts generated by partial melting of the mantle rocks are greatly enriched in incompatible elements, when such fluids and melts react with the depleted mantle, the incompatible elements and LREE will be concentrated in the depleted mantle locally. CO 2 in the shallow part of the Earth can be transported into the Earth′s deep part during plate subduction and participates in the Earth′s carbon circulation. Some CO 2 from the hot spot magma are originated from such re circulating carbon, otherwise, CO 2 from MORB is originated mainly from the primary Earth. The CH 4+H 2O fluid in the mantle, which is infiltrated into the crust matter and the later is transported into the mantle during subduction, makes the carbonated eclogite to be reduced and form diamond bearing eclo ̄gite and water rich fluid, and finally induces partial melting of the mantle rocks. The generated melt may come to the Earth surface by means of volcanic eruption.

地幔流体的形成、聚集和渗透是引起地幔交代作用的主要营力。地幔交代作用发育的强弱决定着所生成岩浆的碱性程度。地幔流体和部分熔融体高度富集不相容元素,它们与亏损地幔的相互作用可以使后者发生LREE和不相容元素的局部富集。通过板块俯冲作用使地球表层的CO2进入地幔,参加地球的碳循环。热点岩浆来源的CO2中含有部分循环的CO2,而大洋中脊玄武岩中的CO2主要是原始地球的CO2。携带CH4和H2O的流体渗透至被俯冲带带入地幔的物质,使碳酸盐化的榴辉岩还原而形成含金刚石的榴辉岩和富水流体,并诱发局部熔融,所形成的熔体以火山喷发的形式上升到地表。地幔岩石中含有大量的流体,它们主要以流体包裹体的形式存在于地幔矿物中。几乎在所有的上地幔环境下形成的矿物中均找到了流体包裹体。包裹体内流体的成分主要是CO2,CH4,H2O及少量H2,N2等。

Laser Raman Microprobe has been used to detect composition of fluid inclusions in olivine phenocrysts in limburgite from Harqin area, eastern Inner-Mongolia. The results show that the fluid inclusions are mainly composed of CO 2, CO, H 2O, N 2 , H 2S, SO 2, hydrocarbons and anionic complex group to a less content,. It is considered that the fluid inclusions trapped in the early-crystallized olivine phenocryst from a slightly evolved mantle-derived magma in a relatively close system...

Laser Raman Microprobe has been used to detect composition of fluid inclusions in olivine phenocrysts in limburgite from Harqin area, eastern Inner-Mongolia. The results show that the fluid inclusions are mainly composed of CO 2, CO, H 2O, N 2 , H 2S, SO 2, hydrocarbons and anionic complex group to a less content,. It is considered that the fluid inclusions trapped in the early-crystallized olivine phenocryst from a slightly evolved mantle-derived magma in a relatively close system may reflect compositions of fluid in the mantle source. Thus by comparison with fluid compositions of peridotite xenoliths from Damaping area of Hannuoba, Hebei province, we suggest that the fluid composition in the mantle beneath north China craton remains stable from the Late Mesozoic to the Cenozoic. Tectonically, both of them are all formed in the lithosphere extensional environment perhaps resulted from upwelling of the asthenosphere.

利用激光拉曼光谱测定了内蒙古东部喀喇沁地区玻基橄辉岩橄榄石斑晶中的原生流体包裹体的成分 ,发现其主要由 CO2 、CO、H2 O、N2 、H2 S、SO2 、芳香族碳氢化合物及少量络阴离子团组成。本文认为 ,此火山岩的橄榄石斑晶中捕获的流体包裹体在一定程度上反映了地幔流体的成分。通过与河北汉诺坝大麻坪地幔岩石捕虏体中的流体成分进行对比 ,认为华北克拉通中、新生代地幔流体成分变化不大 ,它们均形成于软流圈 (层 )上涌、岩石圈伸展的构造背景下。

 
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