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mantle fluid metasomatism
相关语句
  地幔流体交代作用
     THE CHARACTERISTICS OF THE MANTLE FLUID METASOMATISM OF THE ALKALI-RICH PORPHYRIES AND ITS XENOLITHS IN WESTERN YUNNAN
     滇西富碱斑岩及其中包体岩石的地幔流体交代作用特征
短句来源
     The silicon-rich mineralizing fluid process is a continuation of mineralization led by the mantle fluid metasomatism in crust.
     因此,富硅成矿流体作用实质上是地幔流体交代作用在地壳内成矿作用中的延续。
短句来源
  “mantle fluid metasomatism”译为未确定词的双语例句
     The mineral crystalline age(116.0 Ma) of the mantle fluid metasomatism and the age(51.2 Ma) of the silicon-rich mineralizing fluid suggest that the mantle fluid had been active through the whole processe of the alkalic magma diagenism and associated mineralization.
     据此,从地幔流体交代矿物的结晶年龄(116.0 Ma)到富硅成矿流体年龄(51.2 Ma),揭示地幔流体作用贯穿于富碱岩浆成岩成矿的全过程。
短句来源
     The mineralizing process of the silicon-rich fluids is essentially a continuation of the mantle fluid metasomatism during mineralizing processes in the crust.
     这种富硅成矿流体作用实质上是地幔流体作用在地壳中成矿作用的延续。
短句来源
  相似匹配句对
     THE MANTLE FLUID AND METALLOGENY
     地幔流体与成矿作用
短句来源
     COMPOSITION OF MANTLE FLUID
     地幔流体组成
短句来源
     ④fluid;
     4流体;
短句来源
     Mantle eyes
     海湾扇贝外套眼由短柄与外套膜边缘相连,是由一个皮下眼囊构成。
短句来源
     ON FLUID AND MINERALIZATION
     论流体与成矿作用
短句来源
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Upper-mantle amphiboles from China are commonly characterized by high Al(>2.0) and distinguished from one another in TiO_2 and Cr_2O_3. They are divided into two types (pargasite and kaersutite). The pargasite may be saparated into four subtypes: Cr-Ti-poor (Cr_2O_3=0.15%, TiO_2= 0.07%), Cr-rich (2.18%), Ti-rich(3.14%) and Cr-Ti-rich(Cr_2O_3=2.59%, TiO_2=3.16%). Three subtypes of pargasite(Cr-rich, Ti-rich and Cr-Ti-rich) are distributed over the main continent of China and kaersutite occurs in west Taiwan....

Upper-mantle amphiboles from China are commonly characterized by high Al(>2.0) and distinguished from one another in TiO_2 and Cr_2O_3. They are divided into two types (pargasite and kaersutite). The pargasite may be saparated into four subtypes: Cr-Ti-poor (Cr_2O_3=0.15%, TiO_2= 0.07%), Cr-rich (2.18%), Ti-rich(3.14%) and Cr-Ti-rich(Cr_2O_3=2.59%, TiO_2=3.16%). Three subtypes of pargasite(Cr-rich, Ti-rich and Cr-Ti-rich) are distributed over the main continent of China and kaersutite occurs in west Taiwan. They are all derived from various mantle peridotites, pyroxenites and their host Cenozoic basaltic rocks. Only the Cr-Ti-poor pargasite found in high-pressure metamorphic rocks in northern Jiangsu and southern Shandong. It is suggested that all the upper-mantle amphiboles from China have their own genetic characteristics directly or indirectly related with mantle fluid metasomatism regardless of their occurrences.

我国土地幔成因角闪石以高铝(一般>2.0)为特征,以TiO_2、Cr_2O_3含量差异相区别,划分为韭闪石和钛角闪石两大类。韭闪石又有四种不同的成因类型:贫铬、钛型(Cr_2O_3=0.15%,TiO_2=0.07%),富铬型(Cr_2O_3=2.18%),富钛型(TiO_2=3.14%)和富铬、钛型(Cr_2O_3=2.59%,TiO_2=3.16%)。除贫铬、钛型韭闪石发现于苏北-胶南高压变质岩石中外,其它三种韭闪石(产于大陆区)和钛角闪石(产于台湾西部)均来自各种地幔橄榄岩、辉石岩及新生代玄武岩中。不管它们的产出方式如何(填隙、嵌晶、巨晶和包裹体子矿物),都直接或间接与地幔流体的交代作用有关,但各具成因之特点。

Research on heat state and structure of lithosphere is important to better understand continent breakup, metamorphism and reactive tectonics mechanism. Based on geochemistry, structural geology and comprehensive analysis on kimberlite and lamprophyre in Zhenyuan area and the Late Proterozoic strata in northeastern Guizhou and western Hunan Provinces, heat state of lithosphere in southeastern margin of the Yangtze massif in the Upper Palaeozoic has been discussed in this paper. The kimberlite and lamprophyre...

Research on heat state and structure of lithosphere is important to better understand continent breakup, metamorphism and reactive tectonics mechanism. Based on geochemistry, structural geology and comprehensive analysis on kimberlite and lamprophyre in Zhenyuan area and the Late Proterozoic strata in northeastern Guizhou and western Hunan Provinces, heat state of lithosphere in southeastern margin of the Yangtze massif in the Upper Palaeozoic has been discussed in this paper. The kimberlite and lamprophyre in Zhenyuan area are still of high heat production of radioactive elements, respectively 2.83 mWm-3 and 8.09 mWm-3, as imply that there is a high heat production of radioactive elements derived from the earth mantle. It is estimated that kimberlite and lamprophyre are probable derived from the depth from 208 to 244 km at temperature 1 547 1 403℃, which might be attached to asthenosphere, i.e., radioactive elements of mantle source area (HHPRM type mantle source, Fig.1) have a high heat production. On the other hand, heat production of radioactive elements in the Late Proterozoic strata in northeastern Guizhou and western Hunan Provinces is 1.54 mWm-3. The relative cold paleo mantle plume that might be formed by after image of continental subduction during Grenville orogeny from 1200 to 950 Ma. HHPRM type mantle source may be closed related to melting of the relative cold paleo mantle plume by the CO H2O rich of mantle fluid metasomatism that may extract K、U and Th from the lower crust and mantle. At least, three main evolutional processes can be recognized as followings: Firstly, the magma source of kimberlite and lamprophyre in southeastern margin of the Yangtze massif may be derived from the Archaeozoic Proterozoic strata. It is suggested 2 410 Ma by U Pb ages of apatite in the Zhenyuan area and from 2 610 to 1 900 Ma by Pb Pb isochronous ages of zircon in the Dahongshan area, Hubei Province. Zircon and apatite belong to mantle capture type, and their ages may indicate the magma source of kimberlite and lamprophyre. Secondly, that K Ar ages of Ti phlogopite in the Zhenyuan kimberlite and lamprophyre are from 654 to 536 Ma, which may be time limits of mantle fluid metasomatism. The CO H2O rich mantle fluid metasomatism may extract K、U and Th from the lower crust and mantle, resulting in HHPRM type mantle source in asthenosphere in the earth mantle. Finally, when the studied area was transformed into a type of syncollsion rift basin in the Lower Palaeozoic, the CO H2O rich mantle fluid with high heat production of radioactive elements was intruded in the Zhenyuan area from 503 to 497 Ma and this event of tectonic magma ended in the Zhenyuan area from 442.67 to 435.54 Ma.

岩石圈热结构和热状态的研究对于大陆裂解、变质作用及活化构造形成机制等大陆动力学问题的研究十分重要。通过地球化学、构造地质学和综合分析,以贵州省镇远地区金伯利岩-钾镁煌斑岩和黔东—湘西一带的晚元古代地层为例,研究了扬子地块东南缘早古生代岩石圈热结构与热状态。提出高放射性元素产热率的HHPRM型地幔源区,进一步讨论HHPRM型地幔源区形成与演化的大陆动力学机制。认为古富集地幔(HHPRM型地幔源区)是镇远一带的早古生代钾镁煌斑岩-金伯利岩的岩浆源区,镇远地区金伯利岩-钾镁煌斑岩岩浆源区深度(H)在208~244km,形成温度在1547~1403℃间,该温度和深度范围属软流层,具有形成金刚石矿床的地质条件。建议在贵州—湖南—广西三省交界区的金伯利岩和钾镁煌斑岩岩群中应进一步开展金刚石矿床研究与勘查工作。

In this paper, four typical alkali-rich porphyry type deposits are studied by means of lead,silicon,hydrogen,oxygen,sulphur,carbon,helium and argon isotope from rockbodies and ore-veins in deposits, and the following conclusions could be obtained. The initial lead and most lead source of alkali-rich magma and silicon-rich mineralizing fluid were derived from mantle, yet it is inevitably that mantle lead mixed with some lead from crust or strata; The alkali-rich magma derived from a source in enriched mantle...

In this paper, four typical alkali-rich porphyry type deposits are studied by means of lead,silicon,hydrogen,oxygen,sulphur,carbon,helium and argon isotope from rockbodies and ore-veins in deposits, and the following conclusions could be obtained. The initial lead and most lead source of alkali-rich magma and silicon-rich mineralizing fluid were derived from mantle, yet it is inevitably that mantle lead mixed with some lead from crust or strata; The alkali-rich magma derived from a source in enriched mantle to be formed by mantle metasomatism is characterized by high positive number of silicon isotope composition experienced intense dynamic fractionation. But the silicon-rich mineralizing fluid, which has the nature of primary mantle, is characterized by low negative number of silicon isotope composition without dynamic fractionation. To sum up, we beliere that the mineralization was completed by silicon-rich ore-fluid auto-metasomatism to country rocks (including alkali-rich porphyry and stratum rock), and by mixing with crust rock to varying extent, during crystallization of alkali-rich magma. The silicon-rich mineralizing fluid process is a continuation of mineralization led by the mantle fluid metasomatism in crust.

选取马厂箐铜钼金矿、金厂箐金矿、北衙铅金矿和姚安铅银金矿四个典型的富碱斑岩型多金属矿床,对岩体和矿脉的铅、硅、氢、氧、硫、碳及氦、氩同位素分析。结果表明,富碱岩浆和富硅成矿流体的最初和主要铅源均来自地幔,但混染了部分地壳或地层铅;富碱岩浆起源于地幔交代作用形成的富集地幔源区,而富硅成矿流体则具有原始地幔流体性质,前者的硅同位素组成表现为经历强烈动力分馏的高正值;后者则为几乎未经动力分馏的低负值。综合研究表明,该类矿床的成矿作用是在富碱岩浆的成岩过程中,伴随富硅成矿流体对岩体和地层围岩的(自)交代蚀变作用,并与岩石一定程度混染而实现的。因此,富硅成矿流体作用实质上是地幔流体交代作用在地壳内成矿作用中的延续。

 
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