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hydrothermal convection
相关语句
  热液对流
    Mechanism of Hydrothermal Convection and Alteration-Mineralization Zoning in Yinshan Cu-Pb-Zn Deposit,Jiangxi
    江西银山铜铅锌矿床热液对流与蚀变矿化分带机制
短句来源
    DISCUSSION ON THE MINERALIZATION SYSTEM RELATED TO HYDROTHERMAL CONVECTION
    浅析热液对流成矿系统
短句来源
    And it is indicated that the hydrothermal fluids sedimentated to form ore minerals in different stages and formed different ore deposit types because of the long term hydrothermal convection, tectonic pulsation and the changing of physicochemical condition.
    在长期的热液对流循环中 ,随着构造脉动和物理化学条件的改变 ,沉淀出不同阶段的矿石 ,并在不同的构造部位和围岩中形成不同类型的矿床。
短句来源
    Ore-forming substance often is of many different sources in hydrothermal convection mineralization, which determine the complicated evolution route and mingling mechanism of S, O, C and Pb isotopes.
    热液对流成矿过程还是导致成矿物质的多来源性及不同来源物质混合的重要原因,并决定了硫、氧、碳、铅等稳定同位素演化路径和混合机制的复杂性。
短句来源
    The coupling of ore-formation/ hydrocarbon-formation is a phenomenon of convection-circulation of in the hydrothermal system. Oil accumulation in the hydrothermal convection system has universal significance, which is the basis for oil prospecting in the submarine area of hotwater activity or hotuabnomality.
    成矿/成烃耦合是成矿热液对流循环的一种现象,对流循环系统成油机制可能具有普遍的意义,是在海底热液活动区或热异常区寻找油气藏的依据。
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  “hydrothermal convection”译为未确定词的双语例句
    A hydrothermal convection model according to the geohydrologic condition of the Central Hunan Basin is established.
    根据湘中盆地的水文地质特征,建立了热-重力驱动型的流体运移模型;
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  hydrothermal convection
Here, we deduce that heat from these magma chambers drove hydrothermal convection systems causing widespread demagnetization, especially in the subedifice complexes, but also locally within the edifices themselves.
      
These observations, combined with results of a recent heat budget analysis of the lake, have led to the development of hydrothermal convection model for the upper portion of the vent.
      
An early, small-scale hydrothermal circulation system was initiated by the OUG prior to the large-scale hydrothermal convection established by the later Layered Cuillins Complex (LCC).
      
Hydrothermal convection initiated by emplacement of the gabbro-syenite complex of Abu Khruq into the Egyptian basement 89 Ma ago systematically altered the trace element and isotopic compositions of the syenites.
      
Alkali olivine basalts from Skye were simultaneously contact metamorphosed by Tertiary gabbro and granite intrusions and altered by the hydrothermal convection system that the plutons induced.
      
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Erze karst-type gold deposit of Muli, Sichuan, discovered in the western margin of Sichuan-Yunnan metallogenic belt, is tectonically located in the transitional belt between Songpan-Gauze fold system and Yangtze paraplateform.The deposit occurs in the Upper Permian marine carbonate formation. The occurence of orebodies is strictly restricted within the Palaeokarst. The orebodies,which have complex morphology and sharp boundaries with enclosing rocks, are generally in sack-like, with rising and falling roof...

Erze karst-type gold deposit of Muli, Sichuan, discovered in the western margin of Sichuan-Yunnan metallogenic belt, is tectonically located in the transitional belt between Songpan-Gauze fold system and Yangtze paraplateform.The deposit occurs in the Upper Permian marine carbonate formation. The occurence of orebodies is strictly restricted within the Palaeokarst. The orebodies,which have complex morphology and sharp boundaries with enclosing rocks, are generally in sack-like, with rising and falling roof as well as bottom commonly developing "fibrous roots". Siderite is the dominant ore mineral, of which about 90percent of an orebody is composed, with minor quartz and pyrite. Native gold,and, secondly, electrum occur in the siderite bodies unevenly.It shows that the origin of the deposit is associated with a meteoric hydrothermal convection system. Two successive stages of ore-forming process are distinguished: the early one followed by the middle-late one. Temperatures range between 156 and 210℃, and depth is less than 1 km. It is suggested that the carbonate formation is the source bed.The solution is charaterized by alkli, weak in reduction, poor in sulfur, and medium salinity. It is interpreted that during the mineralization the tectonic environment is relatively stable, both gentle uplift and ground water convection are the necessary conditions for the karst development which created the best room for migrating solution and ore deposition; after the gold-siderite ore formation deposit formed. It was strongly suffered from weathering, leading to the widespread development of secondary oxide and the further enrichment of gold.It is a rather unusual and very important gold-deposit type, found only in our country so far. Obviously, it is necessary to study it more in detail.

四川本里耳泽金-菱铁矿建造矿床,赋存于上二叠统海相碳酸盐岩层中,矿化受古岩溶的严格控制,组成矿石的基本矿物为菱铁矿,金不均匀地分布于菱铁矿矿体内。成矿溶液来自加热的循环地下水。成矿过程分为早阶段和中-晚阶段。成矿温度为156-210℃,成矿深度小于1km。成矿物质主要来自地层。成矿热液呈碱性和弱还原性,贫硫,含中等盐度.矿床形成时的地质构造环境较稳定。这是我国仅见的一种特殊金矿类型。

On the basis of the systematic and thoroughgoing studies by the predecessors on the metallogenetic geological background and geochemical characteristics of the polymetallic ore deposits of tin, tungstern, copper, silver and gold in eastern Guangdong area, this paper emphatically goes further into the regional mineralization characteristics, the enrichment process of ore forming metal elements and the migration and sedimentation mechanism of ore forming material in the background of the magmatism of Mesozoic...

On the basis of the systematic and thoroughgoing studies by the predecessors on the metallogenetic geological background and geochemical characteristics of the polymetallic ore deposits of tin, tungstern, copper, silver and gold in eastern Guangdong area, this paper emphatically goes further into the regional mineralization characteristics, the enrichment process of ore forming metal elements and the migration and sedimentation mechanism of ore forming material in the background of the magmatism of Mesozoic granitic volcanic intrusive complexes. It is concluded that the enrichment process of ore forming metal elements went through four stages: metataxis of crustal rocks, magmatic differentiation, fluid melt fractionation and water/rock reaction. And it is indicated that the hydrothermal fluids sedimentated to form ore minerals in different stages and formed different ore deposit types because of the long term hydrothermal convection, tectonic pulsation and the changing of physicochemical condition.

在前人大量系统和深入的成矿地质背景和成矿地质地球化学研究的基础上 ,根据粤东地区锡、钨、铜、银、金多金属矿床 (点 )区域成矿作用特征 ,着重探讨了在中生代花岗质火山 -侵入杂岩岩浆作用的背景下 ,成矿元素的富集过程及成矿物质的迁移、沉淀机制。研究认为 ,成矿物质的富集经历了地壳岩石的选择性部分熔融、花岗质岩浆分异、流体 -熔体分馏和流体与流经岩石相互反应 (水 -岩作用 ) 4个阶段。由于作为热源的岩浆熔体的存在及不同成因断裂裂隙构造的产生 ,富含成矿元素的岩浆热液流体上升 ,并与深循环的大气降水热液混合 ,形成热液对流体系。在长期的热液对流循环中 ,随着构造脉动和物理化学条件的改变 ,沉淀出不同阶段的矿石 ,并在不同的构造部位和围岩中形成不同类型的矿床。

The reality and possibility of the formation of CO 2 rich and Au bearing fluids by mantle derived magmatic degassing are discussed. Combining with relevant materials, the research indicates that CO 2 rich and Au bearing magma may be formed by mantle melting and metasomatism, volatile Au associated with CO 2 may be degassed from the mantle derived magma and be mixed with or be absorbed by meteoric water, the mantle derived magmatic degassing may contribute large quantities of Au and CO ...

The reality and possibility of the formation of CO 2 rich and Au bearing fluids by mantle derived magmatic degassing are discussed. Combining with relevant materials, the research indicates that CO 2 rich and Au bearing magma may be formed by mantle melting and metasomatism, volatile Au associated with CO 2 may be degassed from the mantle derived magma and be mixed with or be absorbed by meteoric water, the mantle derived magmatic degassing may contribute large quantities of Au and CO 2 to hydrothermal systems that are responsible for the formation of Au deposits. The Au in the volcanic rocks in CO 2 gas fields in Shengli oil fields in Eastern China may be taken as a good example for the mechanism . Recently, some mantle derived CO 2 gas wells have been found in the Shengli oilfield. The Au content in volcanic rocks in Shengli oilfield has been analyzed. There are significant differences in Au content of the volcanic rocks between CO 2 gas fields and non CO 2 gas fields: the Au content in volcanic rocks in CO 2 gas fields ranges from 0.0031× 10 -6 to 2.15× 10 -6 (the average is 0.327×10 -6 ) , whereas the Au content in volcanic rocks in non CO 2 gas fields ranges from 0.0000×10 -6 to 0.0055×10 -6 (average is 0.0025×10 -6 ).The research also indicates that the mantle derived magmatic degassing may contribute greatly to hydrothermal convection system that was driven by a steady going deep heat source, enriched with volatile Au and associated CO 2 degassed from the magma,and mixed with meteoric water.

综合国内外研究资料并结合笔者的研究成果 ,评述了幔源岩浆去气形成富二氧化碳含金流体的可能性和现实性。笔者认为 ,在地幔熔融和富集交代过程中可以形成富金和二氧化碳的岩浆 ,进一步在岩浆去气过程中金可以气相形式随二氧化碳排出 ,而一个由深部稳定热源驱动、富含幔源岩浆去气带入的二氧化碳和金并与地壳浅部流体混合的热液环流系统是形成重要金矿化的必要条件。

 
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