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sedimentary environment
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  沉积环境
     Study of Sedimentary Environment of Jiangbei Conglomerate
     江北砾岩沉积环境研究
短句来源
     GRAIN-SIZE DISTRIBUTION CHARACTERISTICS AND THE SEDIMENTARY ENVIRONMENT OF LOWER TERTIARY "T" BEDS FROM A CERTAIN AREA
     某地下第三系T层粒度分布特征及沉积环境
短句来源
     ON THE TYPES OF IRONSTONE AND SEDIMENTARY ENVIRONMENT IN NORTHWESTERN HEBEI
     冀西北铁岩类型与沉积环境
短句来源
     ROLE OF BORON IN STUDYING ANCIENT SEDIMENTARY ENVIRONMENT
     硼在研究古沉积环境中的作用
短句来源
     THE EARLIER LATE TRIASSIC SEQUENCE AND ITS SEDIMENTARY ENVIRONMENT IN WESTERN SICHUAN BASIN
     四川盆地西部晚三叠世早期地层及其沉积环境
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  “sedimentary environment”译为未确定词的双语例句
     Holocene ostracoda and sedimentary environment implication in The core NG93-1 from the Great Wall Bay, Antarctica
     Holocene ostracoda and sedimentary environment implication in The core NG93-1 from the Great Wall Bay, Antarctica
短句来源
     CaCO_3 and Sedimentary Environment of Loess Strata
     黄土地层中的CaCO_3与环境
短句来源
     The sedimentary environment of E271 site is stable, the sedimentation rate of the E272(0-44.5) is 1.02cm/ka, the sedimentation time is 43.6ka.
     E272 站沉积速率比较稳定,整个柱状样长为 44.5cm,平均沉积速率为 1.02cm/ka,沉积时间为 43.6ka。
短句来源
     However, some elements(e. g. Au, Ag, As, Sb, Sr, Ba) were differentiated by sedimentary environment.
     Au、Ag、As、Sb、Sr、Ba等存在一定的分异。
短句来源
     The average(La/Yb)N ratio is 1.85 and the average(La/Ce)N ratio is 1.08.A comparison with the geochemical characteristics of siliceous rock in the known tectonic setting indicates that the sedimentary environment of the siliceous rock in the Jinshajiang suture zone is epicontinental sea basin.
     (La/Yb)N平均值为1.85,(La/Ce)N平均值为1.08,与已知大地构造背景的硅质岩地球化学特征对比,表明其形成环境为陆间洋盆环境。
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  相似匹配句对
     environment;
     环境;
短句来源
     SEDIMENTARY ENVIRONMENT OF COASTAL LAGOONS
     泻湖沉积环境——山东半岛为例
短句来源
     The Environment
     环境
短句来源
     SEDIMENTARY ENVIRONMENT OF XIAMEN BAY
     厦门湾的沉积环境
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  sedimentary environment
in North Bohemia (the Oh?e Rift zone) showed that anomalous volcanic bodies and features can be effectively identified within sedimentary environment.
      
In fact, due to relatively high organic matter content, and reduced water exchange, the Rogoznica Lake has almost permanent anoxic conditions below the depth of 12?m, where sediment can be considered an anoxic-sulphidic sedimentary environment.
      
The intrinsic criteria are satisfactorily met, but the extrinsic requirement of a sedimentary environment is not met.
      
The ambient noise observed on LFASE decreases by up to 12 dB in the upper 100 m of the seafloor in a sedimentary environment.
      
Relations between magmatic rock fragments and sedimentary environment (including manganese nodules) of the Romanche Zone (Atlantic) are discussed.
      
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The original conception of the Sinian stratigraphy and correlation of southern China should be revised on account of the following geological informations: (1) The unconformable relation below the Nantou Sandstone, which commonly occurs within the axial parts of the Kiangnan geanticline, and which was taken to represent the lower boundary of the traditional Sinian system, changes into conformable contact on the southern limb of the Kiangnan geanticline; (2) The absolute ages of the granites unconformably overlain...

The original conception of the Sinian stratigraphy and correlation of southern China should be revised on account of the following geological informations: (1) The unconformable relation below the Nantou Sandstone, which commonly occurs within the axial parts of the Kiangnan geanticline, and which was taken to represent the lower boundary of the traditional Sinian system, changes into conformable contact on the southern limb of the Kiangnan geanticline; (2) The absolute ages of the granites unconformably overlain by the Nantou Sandstone have been determined to be around 700—800 million years, which are just about corresponding to the age of the middle-upper part of the key Sinian section of the Jihshien area in North China. The present writers give new considerations about the Sinian stratigraphy and correlation of southern China according to the following principles and reasons: (1) In the areas, where Caledonian geosyncline inherited from the Hsuehfeng geosyncline, the Nantou Sandstone formation is generally conformable with the underlying low-graded metamorphosed sediments, and in such areas, the overlying sediments are closely related in characters with the underlying strata, and here the total thickness of these formations now considered to be Sinian in age, is usually much greater. On the other hand, in those areas, where the younger sedimentary basin was superimposed upon the folded Hsuehfeng geosynclinal sediments, as occurring within the axial parts of the Kiangnan geanticline, the Nantou Sandstone then lies unconformably upon the more intensely metamorphosed sediments, and there the Sinian system is generally incomplete in section. (2) Although the tradi tional Sinian system of the South China geosynclinal regeion possesses the characters of geosynclinal sediments, it attains a total thickness of only 1000—3000 meters, which appears to be rather insufficient when compared with the vast thickness of some 10,000 meters of the Sinian system in the Yenshan subsidence zone of northern China. (3) The absolute age of the Jiulinshan granodiorite is dertermined to be 837 millions years, which is just corresponding to the age of the middle-upper part of the Sinian system in North China, while the age of the lower limit of the Sinian of northern China is generally accepted to be 1200—1400 millions years. From the above-stated reasons, the present writers are inclined to take the unconformity surface below the upper Banchi Group, (which represents the Tung-an movement), as the lower boundary of the Sinian system of southern China. Thus, the upper Banchi Group is now considered to be the lower part of the Sinian, and the traditional Sinian system of southern China is now taken to represent the upper Sinian. The Hsuehfeng movement of the Kiangnan geanticline marks the boundary between the lower and the upper Sinian. Based upon the above-mentioned scheme of the Sinian subdivisions, some historical developments of the region can be brought out: (1) The formational sequences of the lower Sinian of the South China Caledonian geosynclinal region are chiefly eugeosynclinal and partly miogeosynclinal in nature, but the formational sequences on the southern limb of the Kiangnan geanticline are slightly different in nature from that of the northern limb. Judging from the characters of sediments, the sedimentary environment on the southern limb was rather active while that on the northern limb was relatively stable. During the earlier period of the Sinian time in the Hsuehfeng-Caledonian geosynclinal region, a marginal belt on the north of the embryo Kiangnan geanticline and an inner (mobile) belt on the south can already be distinguished. (2) As a consequence of the Tung-an movement, the embyro form of the Kiangnan geanticline was formed. (3) In western Hunan, the Tungan movement was intense and it diminished in intensity eastward, and in southern Anhui it was represented by epeirogenic movement. However, the subsequent development displays the phenomenon to the contrary. The lower Sinian in southern Anhui and western Chekiang is represented by the typical eugeosynclinal formations, while in northwestern Kiangsi and western Hunan it is represented by either miogeosynclinal or eugeosynclinal formations. Such differences in intensities in earth movements along the regional structural line in a geosynclinal system show the unbalanced development of the Caledonian geosynclinal region in South China.

本文通过接触关系、厚度分析,结合绝对年龄资料,考虑地层剖面发育与构造关系,运用继承与上迭原则,认为继承构造部位剖面最完整这一理由,对江南地背斜带震旦纪地层提出了新的划分方案。新方案中的下震旦统包括上板溪羣及与其相当的上双桥山羣、瀝口羣、松木坞羣等浅变质岩系,以东安运动形成的不整合面作为震旦系与前震旦系的分界;旧称震旦系则归入上震旦统。上、下震旦统之间为雪峰运动形成的不整合面分开。在对上述地层的建造一构造分析的基础上,初步提出华南加里东地槽区江南地背斜带已经出现了南侧比较活动,北侧相对稳定的不对称性。另一方面构造发展在沿走向上也表现了不均一性,东安运动在江南地背斜带的西段表现明显,而到了东段就逐渐消失。

The dinoflagellates and acritarchs dealt with in the present paper were obtainedfrom the bore-hole samples of the Lower Tertiary Naudou Formation in the BoseBasin of Guangxi.A total of 11 genera and 25 species are described and illustrated,including 1 new genus,4 new species,1 new variety and 2 new combinations as listedbelow: Bosea granulata gen.et sp.nov.,B.granorugosa sp.nov.,Saeptodinium tian-dongensis sp.nov.,Granodiscus caperatus sp.nov.,Pediastrum simlex Meyen var.deltoidea var.now.,Bosea (al.Palaeostomocystis)...

The dinoflagellates and acritarchs dealt with in the present paper were obtainedfrom the bore-hole samples of the Lower Tertiary Naudou Formation in the BoseBasin of Guangxi.A total of 11 genera and 25 species are described and illustrated,including 1 new genus,4 new species,1 new variety and 2 new combinations as listedbelow: Bosea granulata gen.et sp.nov.,B.granorugosa sp.nov.,Saeptodinium tian-dongensis sp.nov.,Granodiscus caperatus sp.nov.,Pediastrum simlex Meyen var.deltoidea var.now.,Bosea (al.Palaeostomocystis) laevigata (Jiabo,1978) n.comb.andB.(al.Rugosphaera) operculata (Jiabo,1978) n.comb.The algal fossils of the Nau-dou Formation may be divided into 4 cbaracteristic assemblages in ascending order:1) Bosea-Leiosphaeridia-Granodiscus assemblage,2) Rugosphaera-Granodiscus asse-mblage,3) Granodiscus-Leiosphaeridia-Bosea assemblage,and 4) Pediastrum-Leio-sphaeridia-Granodiscus assemblage.The Naudou Formation may be assigned to LateEocene—Oligocene,mainly Oligocene in age,and its sedimentary environment repre-sents probably the freshwater lacustrine facies.The diagnosis of the new genus Bosea is briefly given below:Tract presumably belonging to dinoflagellate cysts,circular to ovoidal in outline,without apical and antapical horns,with a large “pylome”,which is often situatedat the largest width of tract and represents probably the epitractal archaeopyle.Oper-culum attached or lost.Cingulum,sulcus and reflected tabulation absent.Hypotractlarger than epitract.Surface smooth or granular,rugose,usually lacking in spine-likeprocesses.

本文初步研究了百色盆地那读组的沟鞭藻和疑源类,描述了11属25种,其中1新属、4新种、1新变种和2新组合种。根据藻类化石特征,自下而上划分了4个组合。较详细地讨论了其沉积环境(淡水湖相沉积),并认为它所代表的地质时代为早第三纪中晚期,即始新世晚期至渐新世,可能以渐新世为主。

By using of the accumulative curves of log probability of the particle size analysis, the authors have investigated more than 300 thin sections of the Paleogenic Funing Group and Taizhou Formation in Kiangsu Province, and Changhe Formation in Chekiang Province. It has been found that this method is fairly effective to discriminate the sedimentary environment of ancient sandstone bodies, though it should be verified by other statistical methods of grain size analysis, such as plots of textural paramenters,...

By using of the accumulative curves of log probability of the particle size analysis, the authors have investigated more than 300 thin sections of the Paleogenic Funing Group and Taizhou Formation in Kiangsu Province, and Changhe Formation in Chekiang Province. It has been found that this method is fairly effective to discriminate the sedimentary environment of ancient sandstone bodies, though it should be verified by other statistical methods of grain size analysis, such as plots of textural paramenters, C. M. Patterns, as well as by the studies of well log, mineralogy, paleontology and geochemistry, in order to promote the accuracy of interpretation. It is shown from the various plotted graphs that the curves of fluvial sands are dominantly the type curves of two fragments (members), and may be inferred as representing that of deltaic distributary system. Yet there are also curves of three fragments, which may indicate the deposits of torrential rivers. Beach sands have the characteristics of the presence of two saltant components and the absence of suspend component. The constituents of river mouth bar sands and shoreline sands of distributary debouchs are transitional between that of fluvial sands and beach sands. The deposits of levees and crevasse fans consist predominantly of suspend component. It is interesting to note that this method of grain size analysis can, in certain extent, be adopted to interpret the environment of carbonate sands.

本文用薄片粒度的概率累积曲线分析方法,在与其他相指标相互配合的情况下,试从苏、浙、皖老第三系300多个样品的分析探讨古代河床砂、河口坝砂、天然堤与决口扇砂以及浅滩砂粒度分布的基本特征。并注意到这种粒度分析方法,在一定的条件下,也适用于碳酸盐砂的环境解释。

 
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