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岩石     
相关语句
  rock
    Random Media Solid-head Coupled Mathematics Model and Numerical Tests on Hot Cracking of Rock
    随机介质固热耦合数学模型与岩石热破裂数值实验
短句来源
    Study on the Rheological Constitutive Model of Rock and Its Intelligent Identification
    岩石流变的本构模型及其智能辨识研究
短句来源
    A Study of the Percolation Mechanisms with Rock Deformation and the Application for Low Permeability Gas Reservoir
    低渗气藏岩石变形渗流机理及应用研究
短句来源
    Study on Rheological Mechanical Properties of Rock and Its Engineering Applications
    岩石流变力学特性的研究及其工程应用
短句来源
    Experimental Studies and Modeling of Mechanical Properties of a Porous Rock
    多孔岩石力学性质实验研究与模拟
短句来源
更多       
  rocks
    Research on Post-failure Mechanical Properties of Brittle-plastic Rocks by OOFEM Coupled with IEM
    脆塑性岩石破坏后区力学特性的面向对象有限元与无界元耦合模拟研究
短句来源
    THE RAPID CHEMICAL ANALYSIS OF ROCKS
    岩石快速全分析
短句来源
    K-Ar ISOCHRON AGES OF PRECAMBRIAN ROCKS IN NORTHERN AND NORTHEASTERN CHINA
    我国华北及东北地区前寒武纪岩石K-Ar等时年龄
短句来源
    CATALYTICALLY COLORIMETRIC DETERMINATION OF CHLORINE IN ROCKS
    岩石中氯的催化比色测定
短句来源
    THE EFFECT OF STRESS PATH ON BRITTLENESS AND DUCTILITY OF ROCKS
    应力途径对岩石脆性—延性变化的影响
短句来源
更多       
  of rock
    Random Media Solid-head Coupled Mathematics Model and Numerical Tests on Hot Cracking of Rock
    随机介质固热耦合数学模型与岩石热破裂数值实验
短句来源
    Study on the Rheological Constitutive Model of Rock and Its Intelligent Identification
    岩石流变的本构模型及其智能辨识研究
短句来源
    Study on Rheological Mechanical Properties of Rock and Its Engineering Applications
    岩石流变力学特性的研究及其工程应用
短句来源
    A Study of Rock Physics and Drillstring Whirling
    岩石物理性质和钻柱涡动机理研究
短句来源
    A EXPERIMENTAL STUDY ON LOCALIZATION OF DEFORMATION OF ROCK
    岩石变形局部化的实验研究
短句来源
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  rock samples
    A STUDY FOR THE DETERMINATION OF TRACE ELEMENTS IN ROCK SAMPLES BY X-RAY FLUORESCENCE SPECTROMETRY
    岩石样品中某些微量元素的X射线荧光光谱测定
短句来源
    SIMULTANEOUS AND PRECISE DETERMINATION OF 40 TRACE ELEMENTS IN ROCK SAMPLES USING ICP-MS
    用ICP-MS准确测定岩石样品中的40余种微量元素
短句来源
    THE METHOD OF PROBABILITY STATISTICS OF ELEMENT POINT ANOMALIES ABOUT ROCK SAMPLES
    岩石样品元素点异常概率统计方法
短句来源
    DETERMINATION OF CHLORINE IN ROCK SAMPLES BY GASIFICATION ION CHROMATOGRAPHY
    气化-离子色谱法测定岩石中的氯
短句来源
    Chemical procedures for Re and Os separation include: Carius tube is used to digest rock samples, Os is separated by CCl4 solvent extraction and purified with micro-distillation method, and Re is separated through anion exchange chromatography.
    岩石样品的Re和Os化学分离采用Carius管溶样法,结合CCl4萃取以及微蒸馏的方法分离纯化Os,利用阴离子交换树脂的方法分离纯化Re。
短句来源
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  rock
Nests under a rock wall (7.69%) and a fallen tree (7.69%) were also found.
      
Detailed rock magnetic results show that the magnetic minerals of the sediments were dominated by ferrimagnetic minerals such as magnetite, and a small contribution of hematite and maghematite also existed.
      
The rock series is mainly calc-alk series with high potassium.
      
The South Tianshan Basin and East Tarim Basin were siliceous rock-limestone-mudstone basins.
      
In addition, the characteristics of petrochemical parameters, trace element contents and rare earth element distributions of different rock types of the granitoids in different geotectonic units are also sufficiently discussed.
      
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  rocks
Snow Cocks also favor roosting in areas with low vegetation, sparse grass, short grass, large rocks and close to houses.
      
The Zhongpu Group is distributed in the Shihuigou area and composed of medium-basic volcanic rocks and volcanic clastic rocks interspersed with cherts, limestones, slates, and metamorphic sandstones.
      
The geochemistry of chert from the Zhongpu Group reveals that all cherts coexisting with island-arc volcanic rocks formed in a continental margin basin environment.
      
The geochemical characteristics of intermediate-basic igneous rocks indicate that they belong to a tholeiite suite.
      
Elemental and Sm-Nd isotopic geochemistry on detrital sedimentary rocks in the Ganzi-Songpan block and Longmen Mountains
      
更多          
  of rock
It is usually difficult to determine the actual safety factors of rock masses in an ordinary two-dimensional stability analysis if the safety factors of the different cross sections in the rock mass vary significantly.
      
In the present paper, a connection is established between the parameters of a nonuniform anisotropic load and the permeability tensor of rock.
      
A study is made of the one-dimensional unsteady transport of heavy particles of rock by a flow of flushing fluid in a bore hole.
      
The release of excess silica as a result of clastogenic mica destruction may be a source of rock silification.
      
The isotopic shift is caused by postsedimentary alterations at temperatures up to 200°C under the influence of a moderate influx of metamorphogenic solutions and relative geochemical insulation of rock formations from each other.
      
更多          
  rock samples
This paper analyzes the quantitative grain fluorescence (QGF) and quantitative grain fluorescence on extract (QGF-E) properties of 101 rock samples by using quantitative grain fluorescence techniques.
      
The model was tested for the case of tangential stresses when studying the polyacrylamide-aluminium acetate solutions and for the normal stresses, when studying the strain of the rock samples saturated with oil.
      
Experimental investigation of countercurrent capillary imbibition (CCI) in natural rock samples at various temperatures
      
The developed method has been successfully applied to the determination of cerium in high purity rare-earth oxides, soil, natural water, plant tissue, human hair, and rock samples.
      
The K-Ar and Rb-Sr signatures of whole-rock samples of terrigenous-clayey Riphean rocks from the Yudoma-Maya Trough were studied.
      
更多          
  其他


Various kinds of acid igneous rocks are found around the Kushan, to theeast of Foochow, Fukien. One earlier variety of the granites, provisionally termedas Kushan Granite, is coarser-grained, often flesh-colored, and biotite-bearing,similar in character to the most frequently seen and widely distributed graniteof whole Fukien; the other, the Kueichi Granite, often intruding into the firstnamed, is colored by different shades of grey, mostly, fine-grained, and mia-rolitie, containing minor amount of hornblende...

Various kinds of acid igneous rocks are found around the Kushan, to theeast of Foochow, Fukien. One earlier variety of the granites, provisionally termedas Kushan Granite, is coarser-grained, often flesh-colored, and biotite-bearing,similar in character to the most frequently seen and widely distributed graniteof whole Fukien; the other, the Kueichi Granite, often intruding into the firstnamed, is colored by different shades of grey, mostly, fine-grained, and mia-rolitie, containing minor amount of hornblende instead of biotite, yet sometimesvarying its texture to felsitic, porphyritic, or even to micro-graphic. In thecourse of weathering, the soils thus formed from these two granites, as well astheir corresponding surface vegetations are also evidently dissimilar. That the Kueichi granite was really intruding into the Kushan is evidencedby its ramifying apophyses in the latter, its broad marginal phase, its miaro- litie cavities elongated and lined parallel to the intrusive contact and the"sericitization front", so to show a convex curvature facing the Kushan Graniteside along their mutual contact. The prevalent strike of the contact of the granites conicides with thefracture and joint systems of the Kushan Granite, one set of which is N65°E,being also parallel to one of the major vertical joints of the Kueichi. This isprobably due to the prolonged fracturing during the formation of Pacificfolding zones of the Chekiang and Fukien coast, rendering the KueichiGranite intruding along the said fracture system yet itself subjected to the samemechanical stress. Rocks correlated to these two granites are found elsewhere in Fukien. Theymay also be comparable to the two granites of Sihwashan, S. Kiangsi, foundby C. S. Mo and his colleagues. The repeated intrusions of the Post-Jurassicgranites may allow to consider the possibility of repeated formations of theirgenetically related ores. The lead-zinc deposits of Yuntai and Lungyai areprobably related to the igneous activity of the Kueichi Granite.

经初步瞭解,福建鼓山分布着两种后侏罗纪花岗岩。这从岩石地面分布上的接触情况与显微镜下观察的岩石中组成成分的接触情况两方面得到证实的。从二者产生状态看来,彼此生成时间甚为接近,而同属於太平洋运动产物,分属早晚期活动。再根据前人各种地质文件,推论出福建各地普遍存在着相当於这两种侵入的花岗岩类岩石。因此,联系到福建后侏罗纪金属矿成矿作用的多次性可能。这在江西西华山已有发现。此后从多次性来研究后侏罗纪的炎成矿床的成矿作用,成为必要了。

A Geochemical field method for the determination of traces of molybdenum

本文叙述了测定土壤中微量钼的地球化学野外方法。土壤样品用硫酸及硝酸混合液浸溶,以代替碳酸盐-硝酸盐溶融的方法。讨论了有机物质、铜及其他各种干扰及测定时的条件,从而简化了分析手续,直接在浸提液中用硫氰化钾法测定钼。整个操作系在试管中进行,一个三人小组每日可进行约150个测定。与实验室方法比较的结果,证明此法在地球化学探矿工作中是适用的。此法测定钼含量的范围为1至40ppm,对分析步骤稍作更动,可使测定范围增加至400ppm,如果需要尚可增至4000ppm。尚未试验本法是否适用於测定岩石中的微量钼。

~~

本工作的主要目的是利用华北、中南和西南部分地区各地质年代岩石的天然剩余磁性资料来研究古地极位置,从而提供解决中苏太平洋区域成矿带地质构造问题的一些古地磁资料.我们用无定向磁力仪测定了175块岩石标本的天然剩余磁化强度.这些标本分别属于泥盆纪、石炭纪、二迭纪、三迭纪和侏罗纪五个地质年代.测定的结果是:泥盆纪的地极位置在北大西洋;石炭纪的地极位置比较散乱,这可能跟标本的天然剩余磁性较弱和测量仪器精密度较低有关;二迭纪和三迭纪的地极位置都在北太平洋;侏罗纪的地极位置在印度洋.这些结果跟其他学者分别按照欧美地区岩石天然剩余磁性所获得的结果并不一致.原因何在?目前还不能确定,有待进一步的研究.但若把中国地质矿藏情况进行检查,在这些年代里的古气候都更接近于赤道这一现象,使我们相信本工作的结果更与实际相符合.

 
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