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碎屑组分     
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  detrital composition
     Detrital Composition and their Tectonic Significance of the Mesozoic Sandstones at the Southern Margin of the Eastern Qinling and Dabie Orogenic Belt
     东秦岭——大别造山带南侧中生代砂岩碎屑组分及其构造意义
短句来源
     Through analysis on the tectonic significance of the detrital composition of Mesozoic sandstone,the authors discuss the coupling between basin and mountain and the tectonic evolution during Mesozoic in the eastern Qinling and Dabie orogenic belt.
     通过分析中生代砂岩碎屑组分的构造意义,探讨了东秦岭大别造山带中生代的构造演化及其盆山耦合关系。
短句来源
     The results and the creations in the paper are as follows:Based on the outcrop character, lithology character of exploitation well, the regional disconformity interface, the standard character of detrital composition in sandstone and the regional geotectonic background analysis, it is proved that the direction of source is coming from the north of the studied area, and points out the difference of source between the east and the west for the first time.
     依据露头区基岩特征、探井基岩岩性特征、区域性不整合面、砂岩碎屑组分标型特征、区域大地构造背景分析,证实研究区物源方向主要来此北部,首次提出了东西部物源差异。
短句来源
     Detrital composition and provenance tectonic attributes of Jurassic sandstones, south Hefei basin
     合肥盆地南部侏罗系砂岩碎屑组分及其物源构造属性
短句来源
     CHANGES OF DETRITAL COMPOSITION OF THE PALEOGENE SANDSTONES IN SOUTH JINXIAN SAG OF JIZHONG BASIN AND ITS SEQUENCE SIGNIFICANCE
     冀中坳陷晋南洼陷古近系砂岩碎屑组分变化及其层序意义
短句来源
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  clastic components
     Clastic Components in Core 1787 from the East Pacific Ocean and Their Paleooceanic Significance
     东太平洋1787站柱芯碎屑组分的分布及其古海洋学意义
短句来源
     The assemblages of clastic components and sedimentary environment of the Core 1787 from the East Pacific Ocean
     东太平洋1787柱碎屑组分组合与沉积环境
短句来源
     The influence reservoir factors in this area are mainly terrigenous clastic components, sedimentary facies and diagensis.
     影响本区储层储集性能的主要因素是物源碎屑组分,其次是沉积相带、成岩作用。
短句来源
     The formation of authigenic clay minoral is related to clastic components of clastic rocks.
     自生粘土矿物的形成与碎屑岩的碎屑组分有着密切的关系;
短句来源
  fragment component
     Methods Using the three parameters of heavy mineral assemblage of detrital rock,coarse fragment component and mineralogic maturity,the basin sedimentary boundaries will be foun and studied.
     方法从大量的地质资料入手,利用碎屑重矿物组合、粗碎屑组分和矿物成熟度3种参数确定古盆地边界。
短句来源
     Results This article gives a detailed research of the characteristics of the heavy mineral assemblage of detrital rock,coarse fragment component,mineralogic maturity and the appearance of their changes according to different transport distance,the basin Sedimentary boundaries are exploringly restored.
     结果确定了碎屑岩的碎屑重矿物组合、粗碎屑组分和矿物成熟度的特征及其随着搬运距离的不同而变化的规律,探索性地恢复了古盆地的沉积边界。
短句来源
  chipping component
     Research has indicated that the advantaged sedimentary facies, sand structure granularity and chipping component are the important factors affected the physical property of the reservoir;
     认为有利的沉积相带、砂岩结构粒度、碎屑组分是影响储集体物性的重要因素;
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  detrital composition
Detrital composition of Ordovician sandstones from the Rügen boreholes: implications for the evolution of the Tornquist Ocean
      
Framework detrital composition is siliciclastic and cemented by calcite and/or aragonite.
      
The detrital composition is homogeneous quartzarenite, but the grain-size distribution and thus the initial texture of the sandstones is variable.
      
  clastic components
The ores are rich in organic matter and the difference in organic content between the banded ores and the massive ores is mainly owing to the difference in the clastic components they contain rather than to the subsequent processes of reworking.
      
  fragment component
The composition interface of a fragment component consists of all used generic nonterminals.
      
The composition interface of a fragment component consists of all used extensible nonterminals.
      
The igneous rock fragment component had an elemental composition similar to feldspar when analyzed under the electron microscope.
      
  其他


In Maling oilfield and its vicinity,the process of pore evolution in Yan-10sandstones of Jurassic during diagenesis is discussed in this paper.The mainconclusion proposed are as follows:1)The pore evolution is in fact a process of gradual substitution of secondarypores for the primary ones;2)The decrease of porosity in quartz arenites is mainly due to the precipitationof authigenic minerals in the sandstone pores during diagenesis;while the de-crease of porosity in arenites with more flexible component is mainly...

In Maling oilfield and its vicinity,the process of pore evolution in Yan-10sandstones of Jurassic during diagenesis is discussed in this paper.The mainconclusion proposed are as follows:1)The pore evolution is in fact a process of gradual substitution of secondarypores for the primary ones;2)The decrease of porosity in quartz arenites is mainly due to the precipitationof authigenic minerals in the sandstone pores during diagenesis;while the de-crease of porosity in arenites with more flexible component is mainly caused by compaction during diagenesis;3)The secondary solution pore mainly developed after its diagenetic stage bydissolution and kaolinization in arenite which is abundant in feldspar.This pro-cess is likely to be related to the decarboxylation of organic matter in interbeddedcoal seams and carbonaceous shales by thermalizatin;4)The clastic constituents of sandstone controlled by source materal distinctlyaffect the development of pores.Therefore,the primary and secondary pores insandstones favourable can be predicted on the basis of finding out the sourcematerial of sediments;5)Diagenesis obviously affects on the texture and the uniformity of pores insandstones.

本文论述了鄂尔多斯盆地南部的主力油层(侏罗纪延安统延_(10)砂层组)在成岩过程中的孔隙演化史。作者认为:1.成岩作用改造砂层(岩)的过程,也是改造砂层(岩)中孔隙的过程,砂层(岩)中孔隙的演化史是原生孔隙不断消失和次生孔隙不断形成和消失的过程。2.石英砂屑岩(Quartz arenite)的孔隙度降低,主要是成岩期自生矿物在砂岩孔隙中的沉淀作用造成的;含柔性碎屑组分多的砂屑岩,其孔隙度的降低主要是成岩期的压实作用造成的。3.砂岩中碎屑矿物和自生矿物在成岩期的溶解作用,能产生可观的次生溶孔。本区延(?)砂层组中的次生溶孔主要发育在富含长石的砂屑岩中。此外,还有受力破碎产生的裂隙孔和某些砂岩组分脱水产生的收缩孔等次生孔隙。4.延_(10)砂层组中的次生溶孔,形成于沉积物已固结成岩的阶段。紧邻延(?)砂层组之上的煤系地层和其下的三叠纪延长统泥质岩中有机质,在埋藏成岩热演化过程中所产生的二氧化碳,使地层水的 PH 值降低成为酸性水,这些水进入砂岩中,使其中的长石被溶蚀和高岭土化,从而产生了次生溶孔。5.受沉积物源控制的砂岩碎屑组分,对砂岩原生粒间孔隙的保存和次生孔隙的发育有明显的控制作用。可...

本文论述了鄂尔多斯盆地南部的主力油层(侏罗纪延安统延_(10)砂层组)在成岩过程中的孔隙演化史。作者认为:1.成岩作用改造砂层(岩)的过程,也是改造砂层(岩)中孔隙的过程,砂层(岩)中孔隙的演化史是原生孔隙不断消失和次生孔隙不断形成和消失的过程。2.石英砂屑岩(Quartz arenite)的孔隙度降低,主要是成岩期自生矿物在砂岩孔隙中的沉淀作用造成的;含柔性碎屑组分多的砂屑岩,其孔隙度的降低主要是成岩期的压实作用造成的。3.砂岩中碎屑矿物和自生矿物在成岩期的溶解作用,能产生可观的次生溶孔。本区延(?)砂层组中的次生溶孔主要发育在富含长石的砂屑岩中。此外,还有受力破碎产生的裂隙孔和某些砂岩组分脱水产生的收缩孔等次生孔隙。4.延_(10)砂层组中的次生溶孔,形成于沉积物已固结成岩的阶段。紧邻延(?)砂层组之上的煤系地层和其下的三叠纪延长统泥质岩中有机质,在埋藏成岩热演化过程中所产生的二氧化碳,使地层水的 PH 值降低成为酸性水,这些水进入砂岩中,使其中的长石被溶蚀和高岭土化,从而产生了次生溶孔。5.受沉积物源控制的砂岩碎屑组分,对砂岩原生粒间孔隙的保存和次生孔隙的发育有明显的控制作用。可以在查明沉积物源的基础上,预测砂岩原生孔隙和次生孔隙的有利分布区.6.本区延_(10)砂层组的某些孔?

Carbonic of North-Chaoxian of Anhui provlnce is dominantly compesed of marine carbonate rock. Here by means of facles analysis of section, the authors discuss in detail the characters of these rock types,theis pslmary sedimentary environment, and their development of the environment.The Tinglin formation and the Gaolishan formation of sarly Easly carbonic constitute a complete regresslve sequence. The Jinglin formstion is a series of bioclastic micrite in which the biologic association contained indicates an...

Carbonic of North-Chaoxian of Anhui provlnce is dominantly compesed of marine carbonate rock. Here by means of facles analysis of section, the authors discuss in detail the characters of these rock types,theis pslmary sedimentary environment, and their development of the environment.The Tinglin formation and the Gaolishan formation of sarly Easly carbonic constitute a complete regresslve sequence. The Jinglin formstion is a series of bioclastic micrite in which the biologic association contained indicates an open sea environment with normal saltness,Therefore its sedimentary environment is supposed to be open sea platform, The Gael shan formation consists of terrigenous elastic shale and fins quarts sandstons which is the product of offshore sand bar environment with effect of tide.The lower sequence of the late Early carbonie Hezhon formation consists of calcareous shale and bioclastic miefite. The biologie assemblage contained is characteried by open sea with normal saltness conssqueatly its sedimentary environment is known as open sea platform with occational change of sealevel.The upper sequence is a series of terrigenous clastic or bioclastic micrite. The sealevel of the primary sedimentary basin frequently changed, consequently thes ediment exposed to leaching of fresh water and carst occured, which is equivalent to "loferite cycle"diseribed by A.G. Fisher.The sedimentary environment of Late Carbonic Hvanlong formation and Chvangshan formation dereloped upwards from open sea platform, throvgh high-energs shallow, to offshore swamp.

安徽巢湖北部地区的石炭系,为一套主要以海相碳酸盐沉积为主的地层。本文以相剖面分析方法,对其岩石类型特征、形成环境及演化进行了详细的研究。 早石炭世早期的金陵组和高骊山组属一完正的海退序列。金陵组为一套泥晶生物碎屑灰岩,其生物组合为正常盐度广海型,属开阔海台地环境;高骊山组为一套陆源碎屑组分的页岩和细粒石英砂岩。其石英砂岩属潮汐作用的滨外砂坝环境。 早石炭世晚期的和州组,下部岩石组合为钙质页岩——泥晶生物碎屑灰岩,其生物组合为正常盐度的广海型。其沉积环境为开阔海台地,但海平面时有升降;上部岩石组合为含陆源碎屑或生物碎屑的泥晶灰岩,由于沉积时海平面频繁升降而使沉积物数次露出水面,因遭受淡水淋滤而出现岩溶。相当于A·G·费希尔所称的“洛费尔”旋回。 晚石炭世的黄龙组和船山组则属开阔海台地向上变浅为高能浅滩环境,以至滨海沼泽环境。

The Yuanjiancun deposit is characterized by low grade metamorphism,well exposed stratigraphic section,and simple tectonics.It therefore offers an ideal locality in studying formation environment and metamorphic processes of Precambrian banded iron ores.Developed in shallow water basin of eugeosyncline, the Yuanjiancun formation some 1200 m thick comprises three sedimentation-ore formation cycles,each of which begins with coarse to medium-grained clastic rocks(quartz sandstone or arkose),passing through fine-grained...

The Yuanjiancun deposit is characterized by low grade metamorphism,well exposed stratigraphic section,and simple tectonics.It therefore offers an ideal locality in studying formation environment and metamorphic processes of Precambrian banded iron ores.Developed in shallow water basin of eugeosyncline, the Yuanjiancun formation some 1200 m thick comprises three sedimentation-ore formation cycles,each of which begins with coarse to medium-grained clastic rocks(quartz sandstone or arkose),passing through fine-grained siltstone and pelitic rocks,and grades into pure colloidal chemical deposits represented by thin-bedded ferruginous quartzites. The iron mineral facies present in the ore district are diverse.From the bottom of each cycle upwards,there generally occur in succession pyrite,siderite iron silicates(composed of Fe-chlorite,minnesotaite and stilpnomelane), magnetite and hematite.These iron mineral facies are products of sedimentation, diagenesis and metamorphism of very low grade.The spatial distribution of iron mineral facies in stratigraphic section shows that the sedimentation-ore formation environment had an increasing oxygen fugacity in the course of each cycle. The main factors controlling the types of iron mineral facies and the valence state of iron are considered to be the proportion of pelitic-arenaceous components to colloidal chemical materials during deposition as well as the relative amount of organic substance they contain.The existence of abundant organic materials results in the formation of a reducing environment and the facies dominated by ferrous minerals,whereas lack of organic materials leads to the development of oxidizing media and the formatiom of ferric or ferric-ferrous mineral facies.

山西省吕梁山地区早元古宙袁家村铁矿以变质程度浅、地层剖面完整和地质构造简单为特征。厚约1200m 的袁家村组含铁岩系可以分成三个段,它们分别代表了三个沉积-成矿旋回。其中每一个旋回都是以粗碎屑岩开始,经过粉砂岩和泥质岩逐渐过渡为较纯的胶体化学沉积物即硅质岩。矿区出现的铁矿物相沿剖面自下而上依次为黄铁矿、菱铁矿、铁硅酸盐(包括铁绿泥石、铁滑石和黑硬绿泥石)、磁铁矿和赤铁矿。这些铁矿物相是沉积阶段、成岩阶段至初级变质阶段的产物。它们在地层剖面上的空间分布,反映各旋回铁矿物相的形成环境,在时间上自早至晚,空间上自下而上,其氧逸度逐渐增高。控制铁矿物相类型和其中铁价态形式的主要因素,是沉积时泥砂质碎屑组分和铁硅质胶体化学组分的性质和相对比例,以及其中有机质的存在与否及其多寡。

 
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