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钛成矿作用
相关语句
  titanium mineralization
     Titanium Mineralization in Sulu Ultrahigh-Pressure Eclogites: Mineralization at the Convergent Boundary between North China Plate and Yangtze Plate
     苏鲁超高压榴辉岩中的钛成矿作用:大陆板块汇聚边界的成矿作用
短句来源
     Titanium mineralization in Sulu UHP eclogites is dominated by rutile-type deposit, where rutile occurs mainly as inclusions in metamorphic minerals, intergranular crystals or veinlets.
     苏鲁超高压榴辉岩中的钛成矿作用以金红石型钛矿床为主,其中金红石以变质矿物中的包裹体、晶间颗粒或脉状形式出现。
短句来源
     In combining mineralogy, petrology and geochemistry, it is suggested that titanium mineralization at the convergent boundary between North China plate and Yangtze plate took place in four stages: primary titanium enrichment in protolithes of eclogites, titanium mineralization during subduction of continental materials, titanium mineralization during exhumation of subducted materials, and rutile mineralization in fluid-rich environments.
     综合矿物学、岩石学、地球化学等研究,我们提出大陆板块汇聚边界的钛成矿作用应该经历了原岩的初始富集、陆壳物质俯冲过程中钛的成矿作用、俯冲板块折返过程中钛的成矿作用和流体阶段的金红石成矿作用四个主要成矿阶段。
短句来源
  相似匹配句对
     Titanium Mineralization in Sulu Ultrahigh-Pressure Eclogites: Mineralization at the Convergent Boundary between North China Plate and Yangtze Plate
     苏鲁超高压榴辉岩中的成矿作用:大陆板块汇聚边界的成矿作用
短句来源
     Oxygenation of titanium and titanium alloy on the anode
     合金阳极氧化
短句来源
     Titanium in Cast Iron
     铸铁中的
短句来源
     ON THE DIVERSITY OF MINEROGENETIC PROCESSES OF THE YANSHANIAN PERIOD
     燕山期成矿作用的多样性
短句来源
     Metallogeny in Relation to Supercontinent
     超大陆旋回和成矿作用
短句来源
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Rutile is a common Ti-bearing accessory mineral in eclogites. In the 100-2000m borehole samples of the Chinese Continental Scientific Drilling Project, rutile appears more or less in rutile eclogite, phengite eclogite and kyanite eclogite. It is mainly included in major metamorphic minerals, or as intergranular grains between them. When eclogite suffered amphibolite-facies retrograde metamorphism, rutile was often retrograded to produce sphene aureole. Apart from the major components, trace elements such as...

Rutile is a common Ti-bearing accessory mineral in eclogites. In the 100-2000m borehole samples of the Chinese Continental Scientific Drilling Project, rutile appears more or less in rutile eclogite, phengite eclogite and kyanite eclogite. It is mainly included in major metamorphic minerals, or as intergranular grains between them. When eclogite suffered amphibolite-facies retrograde metamorphism, rutile was often retrograded to produce sphene aureole. Apart from the major components, trace elements such as Nb, Cr and Zr are measured by electron microprobe with specific operating conditions. Rutiles contain on average 147ppm Nb with the maximum 670ppm, while the average Cr content is 614ppm with the maximum value of 3630ppm. Overall, low Nb concentrations in rutile (<1000ppm) indicate a mafic source-rock for the eclogites. Additionally, three types of eclogites are also distinguishable on the basis of their Nb, Cr concentrations. Rutiles from the rutile eclogites display low Cr (<500ppm) and variable Nb contents (0-670ppm), and those from the phengite eclogites are characterized by moderate Cr (500-1200ppm) and also variable Nb (0-480ppm). Rutiles from kyanite eclogites are diagnostic, being highly enriched in Cr (2000-3630ppm) but very poor in Nb (<140ppm). Although Zr is very low in rutile, most of Zr contents range between 150 and 240ppm with an average of 200ppm. The highest Zr contents of each samples is used to estimate formation temperature of rutiles, based on a new Zr-in-rutile geothermometer proposed by Zack et al. (2004) , which vary from 690℃ to 787℃. The study shows that trace-element geochemistry can serve as a potential tool for provenance of eclogites and for estimation of temperature of associated Ti mineralization.

金红石是榴辉岩中的主要含钛副矿物。中国大陆科学钻探工程主孔100-2000m岩心样品中,金红石榴辉岩、多硅白云母榴辉岩和蓝晶石榴辉岩中都程度不等地含有金红石。金红石既可以与其它矿物一起包裹在主要变质矿物中,也可以呈粒间矿物,但在榴辉岩经受角闪岩相退变质作用过程中,金红石亦会退变为榍石。本文利用电子探针除了分析了金红石的主要元素外,还仔细测量了Nb、Cr、Zr含量。结果显示,Nb平均含量为147ppm,最高含量为670ppm,Cr的平均含量为614ppm,最高含量为3630ppm,低Nb特征(<1000ppm)显示榴辉岩原岩为镁铁质岩石;此外,三类榴辉岩也具有不同的金红石Nb、Cr地球化学特征,即金红石榴辉岩中的金红石表现为低Cr(<500ppm)、Nb变化大(0-670ppm)的特征,多硅白云母榴辉岩中的金红石以中等Cr含量(500-1200ppm)、Nb变化较大(0-480ppm)为特征,而蓝晶石榴辉岩中的金红石显著富Cr(2000-3630ppm),而Nb则非常贫乏(<140ppm)。在总共289个金红石Zr含量数据中,大部分Zr含量分布在150-240ppm之间,均值约为200ppm;利用Zacketa...

金红石是榴辉岩中的主要含钛副矿物。中国大陆科学钻探工程主孔100-2000m岩心样品中,金红石榴辉岩、多硅白云母榴辉岩和蓝晶石榴辉岩中都程度不等地含有金红石。金红石既可以与其它矿物一起包裹在主要变质矿物中,也可以呈粒间矿物,但在榴辉岩经受角闪岩相退变质作用过程中,金红石亦会退变为榍石。本文利用电子探针除了分析了金红石的主要元素外,还仔细测量了Nb、Cr、Zr含量。结果显示,Nb平均含量为147ppm,最高含量为670ppm,Cr的平均含量为614ppm,最高含量为3630ppm,低Nb特征(<1000ppm)显示榴辉岩原岩为镁铁质岩石;此外,三类榴辉岩也具有不同的金红石Nb、Cr地球化学特征,即金红石榴辉岩中的金红石表现为低Cr(<500ppm)、Nb变化大(0-670ppm)的特征,多硅白云母榴辉岩中的金红石以中等Cr含量(500-1200ppm)、Nb变化较大(0-480ppm)为特征,而蓝晶石榴辉岩中的金红石显著富Cr(2000-3630ppm),而Nb则非常贫乏(<140ppm)。在总共289个金红石Zr含量数据中,大部分Zr含量分布在150-240ppm之间,均值约为200ppm;利用Zacketal.(2004)提出的金红石温度计,计算得到金红石的形成温度介于690℃和7870℃之间。研究结果表明,金红石的微量元素分析是研究榴辉岩原岩特征及其钛成矿作用的实用方法之一。

Eclogite-type titanium mineralization is one of important source of titanium. Titanium mineralization in Sulu UHP eclogites is dominated by rutile-type deposit, where rutile occurs mainly as inclusions in metamorphic minerals, intergranular crystals or veinlets. Ti-rich garnet is the primary phase of exsolution of rutile inclusions. Petrochemical characterization indicates that rutile mineralization is favorably related to Ti-high eclogites, which originated from Ti-rich basic rocks. Study using infrared microtechnique...

Eclogite-type titanium mineralization is one of important source of titanium. Titanium mineralization in Sulu UHP eclogites is dominated by rutile-type deposit, where rutile occurs mainly as inclusions in metamorphic minerals, intergranular crystals or veinlets. Ti-rich garnet is the primary phase of exsolution of rutile inclusions. Petrochemical characterization indicates that rutile mineralization is favorably related to Ti-high eclogites, which originated from Ti-rich basic rocks. Study using infrared microtechnique reveals three types of fluid inclusions in rutile: Ⅰ-type aqueous inclusions, Ⅱ-type CO_2-H_2O inclusions and Ⅲ-type CH_4 inclusions. Primary and pseudosecondary type Ⅰ inclusions, as well as Ⅱ-type fluid inclusions, having a range of pressure between 0.6 and 1.3 GPa, were trapped during the amphibolite-facies retrogression stageof eclogites, suggesting that fluids related to rutile mineralization originated from water released during retrograded metamorphism of eclogites. Sulu UHP eclogites are products of collision between South and North blocks. Subduction-exhumationof volumetrically continental materials gave rise to formation of diverse UHP metamorphic rocks, and simultaneously titanium mineralization with rutile as principle ore mineral. In combining mineralogy, petrology and geochemistry, it is suggested that titanium mineralization at the convergent boundary between North China plate and Yangtze plate took place in four stages: primary titanium enrichment in protolithes of eclogites, titanium mineralization during subduction of continental materials, titanium mineralization during exhumation of subducted materials, and rutile mineralization in fluid-rich environments.

榴辉岩型钛矿床是重要的钛矿床类型之一。苏鲁超高压榴辉岩中的钛成矿作用以金红石型钛矿床为主,其中金红石以变质矿物中的包裹体、晶间颗粒或脉状形式出现。富钛石榴子石是金红石包裹体出溶的初始矿物。岩石地球化学研究表明,有利于金红石成矿的榴辉岩为高钛榴辉岩,其源岩为富钛基性岩。利用红外显微镜对金红石进行的流体包裹体研究表明,金红石中主要存在三类流体包裹体,即型H2O溶液包裹体、型CO2-H2O包裹体和型CH4包裹体,其中I型原生和假次生流体包裹体和型流体包裹体反映出的压力范围为0.6~1.3GPa,与榴辉岩角闪岩相退变质作用的压力相当,说明与这类金红石形成有关的变质流体源于榴辉岩退变质作用所释放的水。苏鲁地区超高压榴辉岩是华南—华北板块碰撞的结果,巨量陆壳物质俯冲—折返形成了多样式的高压—超高压岩石,与此同时也发生了以金红石为主要矿石矿物的钛成矿作用。综合矿物学、岩石学、地球化学等研究,我们提出大陆板块汇聚边界的钛成矿作用应该经历了原岩的初始富集、陆壳物质俯冲过程中钛的成矿作用、俯冲板块折返过程中钛的成矿作用和流体阶段的金红石成矿作用四个主要成矿阶段。

 
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