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rock unit     
相关语句
  岩石地层单位
     Accordingly,the structural rockstratigraphic unit and tectonic rock unit have been divided.
     据此划分了构造岩石地层单位和构造岩石单位。
短句来源
  岩体单元
     Given the water head continuance in the connecting section of fracture unit and rock unit,and the discharge is allowed discontinous,the three-dimension fracture leakage comprehensivemodel has been established in this paper, and the corresponding finite progression calculation pattern has been described as well.
     假设裂隙单元与岩体单元交界面上水头连续,而允许流量不连续,建立了三维裂隙岩体渗流混合模型,给出了相应的有限元计算格式。
短句来源
  岩石单位
     (2) The design plan of diamond concentration is submitted by comparing the pressure of rock unit area forcing by diamond with crack strength of rock;
     b、提出了通过比较金刚石施加给岩石单位面积的压力与岩石抗压强度来设计金刚石浓度;
短句来源
     Accordingly,the structural rockstratigraphic unit and tectonic rock unit have been divided.
     据此划分了构造岩石地层单位和构造岩石单位
短句来源
  岩石单元
     The Luobusa ophiolite exist in the eastern segment of Yalu Zangbu(Yarlung Zangbo) suture zone, whose rock units are complete and which has many characteristics in itself, such as the major rock unit is mantle peridotite and the crust rock is complicated;
     罗布莎蛇绿岩地处雅鲁藏布江蛇绿岩带的东段。 该蛇绿岩岩石单元出露齐全,又有其自身的特点,如:以地幔橄榄岩为主,地幔橄榄岩构造变形强烈;
短句来源
     The strata in the adjacent area of Su-Zhe-Wan (the provinces of Jiangsu, Zhejang, and Anhui ) area dated from Changxing period of the late Permian are taken as a rock unit , which , from southeast to northwest of the study area, are successively divided into peri-beach tide-flat fades, shallow water carbonate platform facies , platform - front carbonate depression fades and peri-platform margin siliceous rock facies.
     本文以苏浙皖毗邻地区晚二叠世长兴期地层为岩石单元,该单元从研究区东南向西北依次划分为近滩潮坪相、浅水碳酸盐台地相、台前碳酸盐凹陷相及近台边缘硅质岩盆地相。
短句来源
     With the remote sensing techniques as the means and regional geological mapping as the target and from the angle of the1∶250000remote sensing geological mapping,this paper proposes and deals with the theoretical basis for the establishment of the image unit method,image rock unit method and unit section method and their technical requirements and application principles,thus initiating a new way for accelerating the pace of regional geological mapping.
     以遥感技术为手段,以区域地质填图为目标,从1∶25万遥感地质填图方法角度,提出和论述了影像单元法、影像岩石单元法和单元剖面法建立的立论基础、技术要求和应用原则,为加快区域地质填图步伐开辟了新途径。
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      rock unit
    The nature of the gravity induced stress field in a stratified rock mass depends on the elastic properties of each rock unit and how these properties vary with depth.
          
    A critical analysis of such 3D analyses together with the results of mechanical tests could improve predictions of short- and long-term behavior of a rock unit.
          
    For any specific rock unit in a discontinuous rock mass, the determination of structural domain boundaries is important because geologic and hydrologic properties vary from one domain to another.
          
    The corresponding Hoek and Brown failure envelopes have been drawn and failure equations have been suggested for stability analysis of dam foundation, slope stability and diversion tunnels for each rock unit.
          
    Data obtained indicate that the best water regime and a high diversity of plant species are characteristic of a massive limestone rock unit; whereas worse water regimes characterize densely jointed and thinly bedded limestones.
          
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    Baima mafic unit is one of the main bases of V-Ti-magnetite resources in the Panzhihua-Xichang region. It mainly consists of olivine gabbro of stratiform structure. Lithological and petrochemical features of this rock are similar to those of other V-Ti-magnetite rocks available in the same region and also similar to those of late Permian basalt, Mt. Emei basalt, which widely spreads ihroughout this region. All of these varieties belong to products of crystallization of subalkaline basaltic magma via plutonic...

    Baima mafic unit is one of the main bases of V-Ti-magnetite resources in the Panzhihua-Xichang region. It mainly consists of olivine gabbro of stratiform structure. Lithological and petrochemical features of this rock are similar to those of other V-Ti-magnetite rocks available in the same region and also similar to those of late Permian basalt, Mt. Emei basalt, which widely spreads ihroughout this region. All of these varieties belong to products of crystallization of subalkaline basaltic magma via plutonic differentiation. The magma tnvolved is rich in Fe, Ti and poor in Si, Mg. Four ore-bearing beds consisted of ultramafic varieties occur in the lower part of the Baima rock unit. The composition and texture of ores are quite different from those of wall rocks. Ore minerals present in granulitic assemblage, filling up the interstitials of rock-forming minerals and show strong corrosion, which saggests an origin of late magmatic crystallization. The forming temperature is supposed to be in the range of 600 to 630℃. Either ore-beds or wall rocks possess no strong differentiati on from bottom upward. The ratio of Fe & Mg-oxides to oxides of the total rock shows a good linear relastionship, which indicates that the enrichment of Ti & Fe-oxides inheritated the petrochemical characteristics of the primary magma. Ore mineral enrichment took place during liquid magma stage and crystallized after the main rock forming minerals had formed. Therefore, the origin of V-Ti-magnetitc ore could not be the result of a simple crystallization differentiation, but of magmatic differentiation and liquation taken place in magma, when Mg-Fe(Ti)-oxides consisted 40% of the total rock oxides. In the liquated magma Mg and Fe consist 60—70%. The ratio of Mg and Fe silicates to the Ti-magnetite is about 1:1. The favourite condition for liquation and crystallization must have occured at the central part of the rock body. That is why the thickness and quality of ore beds in Baima ore field are better than in. Qingangping ore field, which happend to be at the flank of the rock unit.

    白马岩体以橄榄辉长岩为主,具层状构造,为富铁钛、贫硅镁的深源分异形成的弱碱性玄武岩浆的结晶产物,岩性与本区广泛分布的晚二叠纪峨眉山玄武岩相似。含矿层以铁质超基性岩为主,呈条带状赋存于岩体下部形成四个含矿带,矿石组成及结构与围岩有明显区别,金属矿物都呈粒状集合体充填于主要造岩矿物之间,并具强烈熔蚀现象,表明其晚岩浆结晶成因。形成温度在600—630℃之间。

    The Archean Taihua high-grade metamorphic belt aloeg the W-S margin of the north China craton can be divided into two rock units,(1) Quartzo-Feldspathic gneisses (tonalitic gneisses) containing biotite and plagioclase, quartz with or without potash feldspar and honblend. Chemically, they have high Na/K rations (average 3.22) similar to tonalites. These rocks often constitute domes.(2) Supracrustal rocks including meta-volcanics (granulite, amphibolite and komatiitic gneiss) and metasediments (sillimanite-garnet...

    The Archean Taihua high-grade metamorphic belt aloeg the W-S margin of the north China craton can be divided into two rock units,(1) Quartzo-Feldspathic gneisses (tonalitic gneisses) containing biotite and plagioclase, quartz with or without potash feldspar and honblend. Chemically, they have high Na/K rations (average 3.22) similar to tonalites. These rocks often constitute domes.(2) Supracrustal rocks including meta-volcanics (granulite, amphibolite and komatiitic gneiss) and metasediments (sillimanite-garnet gneiss, graphite gneiss, marble and quartzite) which constitute khondalite.From field, petrographic and geochemical date, the quartzo-feldspathic gneisses are interpreted as plutonic tonalites, Meta-volcanics are of the tholeiitic origin. Without doubt, khondalite is a series of sediments and its sedimentary environment was an epicontinental platform or shelf. Available results suggest a shallow water and stable tectonic setting for the Taihua high-grade metamorphic belt. Clearly, it is different from Archean greenstone belt, for example, the Dengfeng greenstone belt located adjacent to it on the north.

    位于华北地块西南缘的太古代太华高级变质带,是由长英质片麻岩和上壳岩两套经受多期变质作用的高度变质杂岩所组成。空间上位于该带下部,呈穹窿状产出的长英质片麻岩具太古代英云闪长岩特征。上壳岩套上部的富铝片麻岩以及与其伴生的大理岩、石英岩是一套类似孔兹岩系的陆架或陆缘台地型变质沉积建造,而其下的变质基性岩的原岩属拉斑玄武岩。根据建造特征,结合地球化学分析,推测太华高级变质带中的上壳岩套是在已存英云闪长质地壳、经沉降而造成的浅水稳定条件下形成的。这显然与北部拉张条件下形成登封绿岩带的环境不同。也有别于显生宙之后发生附冲作用的环境。

    Based on applying the techniques of structural analysis to rocks involved in the so-called "Yingtaoyuan Formation" near Anshan city, Liaoning province, structural sequence and thus the tectonic style of this formation have been discerned and clarified. Rocks belonging to the "Yingtaoyuan Formation" have undergone at least three phases of deformation during Proterzoic time. The first phase of deformation produced folds ranging in size from intrafolial to regional scale and generally exhibiting tightly appressed...

    Based on applying the techniques of structural analysis to rocks involved in the so-called "Yingtaoyuan Formation" near Anshan city, Liaoning province, structural sequence and thus the tectonic style of this formation have been discerned and clarified. Rocks belonging to the "Yingtaoyuan Formation" have undergone at least three phases of deformation during Proterzoic time. The first phase of deformation produced folds ranging in size from intrafolial to regional scale and generally exhibiting tightly appressed to isoclinal forms of nearly N-S trend. F1 folds have a best development and exercise the major control on the disposition of rock units within entire area. S1, a newly formed planar element which is an axial plane to F1 folds, is defined by the preferred orientation of platy minerals such as,mica and chlorite in pelitic rocks and by parallel banding in ore-bearing quartzite. It shows transposition relationship with preexisting So, the origional bedding of rocks. Linear structures including boudins, mullions and Si/So intersections are found in various rock types. Mullions are always occurred in the hinge protions of folds (particularly in antiform) and this may be taken as an indication to identify folds in thick-bedded and even massive rocks. Structures by which the second phase deformation was denoted are S2, F2 and L2. S2 is a set of typical crenulation cleavage that overprinted on an anisotropic background of rocks which already contained earlier structures S0, S1 and F1 etc.. It is an axial plane to F2 folds, a series of folds of mainly mesoscopic in size except those distributed in the Yanqianshan domain. Fine wrinkles, the surface expression of S2/S1 intersections, labelled L2, are widely distributed on S1 (≈S0) surface within pelitic rocks and run parallel to axial trends of folds nearby. Third phase deformation is marked by the spasmodically developed kink-bands. All of these indicate a general evolution tendency of decrease in both metamorphic temperature and plasticity of rocks during this tectonic cycle. On the basis of considering the geometrical homogeneity of the S1 fabric, 9 domains were divided throughout the area occupied by this formation. Data obtained from field survey have been plotted on equal-area stereogram (lower hemisphere) for each domain. Preferred orientation and trend determination of the ambiguous fabric patterns are determined by means of computer treatment using the eigenvalue method. By comparing the structural sequence and tectonic style in the "Yingtaoyuan Formation" to those in the underlying granulite association of the Archean Anshan Group, it is obvious that a great difference exists between these two rock units and that it is improper to regard the "Yingtaoyuan Formation" as one unit of the Archean Anshan Group as was proposed previously by many geologists. However, there is a great resemblance between this formation and the overlying Liaohe Group (Upper Proterozoic) in two aspects, i.e. the structural sequence and the metamorphic facies, so it is reasonable to correlate the time of this formation to Ferrian of Early Proterozoic.

    本文区分了“樱桃园组”岩石在元古主构造旋回的三幕变形,详细描述了各幕SFL组合和按区段进行了投影。主变形幕D_1的构造最发育,F_1控制着本区的岩性分布。构造序列及样式变化显示由高塑性向脆性的变形格式。本组与下伏的太古鞍山群变粒岩在构造序列、样式和变质相上都有显著差异,过去许多地质学家把二者混划为一个单位,统名“鞍山群”,属太古宙。但本组与上覆的辽河群(上元古)的构造样式和变质相却相似,故其时代相当于早元古Ferrian期。

     
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