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海退
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  marine regression
    The δ13C value of marine organic carbon in the Changxing Stage in southern China is 3‰o to 7‰ lighter that of modern marine depositional organic matter, this was principally due to the high concentration of CO2 in ocean and atmosphere brought about by global marine regression and vocanic activities during the Changxing Stage.
    长兴期中国南方海相沉积有机质δ~(13)C_(org)相对于现代海相沉积有机质δ~(13)C_(org)偏轻3‰~7‰,造成这一现象的主要原因可能是晚二叠世全球大范围的海退和火山活动所引起的大气及海水中CO_2含量的升高。
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    In order to determine a mapping method for sequence stratigraphy lithofacies and paleogeography,the mapping test for sequence stratigraphy lithofacies and paleogeography of the Late Permian reef in Sichuan Basin was carried out. Eight maps of sequence stratigraphy lithofacies-paleogeography were given,on the basis of the isotime surface of each sequence at lower point of marine regression and high point of marine transgression in the Late Permian reef in Sichuan Basin.
    为了探索层序地层岩相古地理编图方法 ,对四川盆地晚二叠世生物礁层序地层岩相古地理进行了编图试验 ,以四川盆地晚二叠世生物礁各层序地层的海退低点及海侵高点作为相对等时面编制了 8幅层序地层岩相古地理图。
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  “海退”译为未确定词的双语例句
    FORCED REGRESSION AND FORCED REGRESSIVE WEDGE SYSTEM TRACT:REVISION ON TRADITIONAL EXXON MODEL OF SEQUENCE STRATIGRAPHY
    强迫型海退及强迫型海退楔体系域——对传统Exxon层序地层学模式的修正
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    SEDIMENTATION AND GEOLOGIC SIGNIFICANCE OF FORCED REGRESSION
    强制海退沉积作用及其地质意义
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    Research on Causality of Guizhou Ziyun Movement and the Regression of Late Devonian South China Plate
    贵州紫云运动与泥盆纪末华南板块海退事件的因果关系研究
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    The origin of coal seams is related to fluviation and lagoon and tidal flat
    整个晚古生代煤系表现为一海退过程,煤层的形成与泻湖、潮坪及河流作用有关。
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    Besides, trace element Al is a good sign for transgression-regression cycle.
    此外,微量元素Al的变化也是海侵海退旋回的良好标志。
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  marine regression
The fraction of Fe-sulphides increases and becomes the dominant minerals determining the magnetic characteristics in grey-black organic-rich clay horizons, indicating an anoxic, sulphate-reducing swamp environment resulting from a marine regression.
      
During climate cooling and associated marine regression, permafrost aggradation takes place due to the low temperatures and the direct exposure of the shelf to the atmosphere.
      
Additional analysis using subsets of the data or recoding periods of anoxic water as periods of reduced habitable area (in addition to marine regression) also failed to show a significant association.
      
The decrease in S, and the increase in siderite-Fe, can be attributed to decreasing marine influence, as a result of the marine regression at the Pliocene-Pleistocene transition.
      
The second phase of the model, marine regression, can only explain the colonization of the region by the ancestor; the subsequent evolution and speciation at a smaller scale remain to be explained.
      
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The Haicheng earthquake (Feb. 4, 1975, M=7.3) has caused the extensive liquefaction of sand in the Lower Liaohe River region, which expressed itself as ejected water and sandflows, sundken lands and sandy holes on ground surface, ground drumlings, landslides and ground fissures.According to the degree of ejection and ground failure the liquefied region may be classified into three areas different in hazard, i. e. intensive( I ), moderate(Ⅱ) and weak (IE). The liquefied region in the Lower Liaohe River has been...

The Haicheng earthquake (Feb. 4, 1975, M=7.3) has caused the extensive liquefaction of sand in the Lower Liaohe River region, which expressed itself as ejected water and sandflows, sundken lands and sandy holes on ground surface, ground drumlings, landslides and ground fissures.According to the degree of ejection and ground failure the liquefied region may be classified into three areas different in hazard, i. e. intensive( I ), moderate(Ⅱ) and weak (IE). The liquefied region in the Lower Liaohe River has been a regression area in Holocene period, covered by a layer of clayey soil with a thickness of 2-5m. This layer is thinner in the intensive hazard area with a higher aquifer head, but thicker in the weak hazard area with a lower head.The monograin structure of ejected sands shows the loosening nature of liquefied sandy layer. In the intensive hazard area the sand grains ejected are found to be coarser. According to the present analysis of sand grains it is concluded that the roundness of grains is of less importance in determining whether a sandy soil can be readily liquefied or not.

海城地震引起下辽河平原大面积砂土液化,液化震害有喷水冒砂、陷落砂坑、地滑移等等。液化区是全新世海退之地,震害严重区地表粘性土层薄,承压水头高;震害轻微区地表粘性土层厚,承压水头低。喷砂颗粒的单粒结构表明液化砂层具有松散的特点,砂颗粒的滚圆度在液化难易上不起主要作用。

The Upper Permian System Longtan coal measure in the Changguang coal deposit is a complete sedimentary cycle, consisting of a regressive and a transgressive series.C seam was deposited in the initial period of transgression. It is a kind of in-situ bark liptobiolites containing a large quantities of marine animal fossils of different phylum.Based on the investigation of sedimentary features of the coal measure, efforts were concentrated on the lithological characteristics of the coal seam, immediate roof and...

The Upper Permian System Longtan coal measure in the Changguang coal deposit is a complete sedimentary cycle, consisting of a regressive and a transgressive series.C seam was deposited in the initial period of transgression. It is a kind of in-situ bark liptobiolites containing a large quantities of marine animal fossils of different phylum.Based on the investigation of sedimentary features of the coal measure, efforts were concentrated on the lithological characteristics of the coal seam, immediate roof and floor, and their paleontological and petrographical characteristics. The author puts forward the view that the coal is of marine origin and holds that C seam in the Changguang coal deposit was formed in a very shallow sea environment near the land strand line (intertidal zone).

长广煤田上二迭统龙潭含煤岩系是由海退系列和海进系列组成的一个完整沉积旋回。C煤层沉积处在海进的初期,它为富含多门类海相动物化石的原地树皮残植煤。作者在含煤岩系沉积特征研究的基础上,着重研究了煤层及其直接顶底板的岩性、古生物和岩相特征,提出了海相成煤的认识,即长广煤田C煤层是在陆表海滨线(潮间带)附近的极浅海水的环境中形成的。

During the Early Triassic Period, this area was located on the northern margin of Jiangnan old Land, as a carbonate platform in Jiangsu Chekiang Anhui epeiric sea on the Lower Yangtze Platform. The lower Qinglong group was developed quite cmpletely here, and may be divided into three formations: Yinkeng formation Helong shan formation and Biandanshan formation.According to the variety of carbonate rocks, their sedimentary features and fossil assemblages, it is shown that Qinglong limestone of this area belongs...

During the Early Triassic Period, this area was located on the northern margin of Jiangnan old Land, as a carbonate platform in Jiangsu Chekiang Anhui epeiric sea on the Lower Yangtze Platform. The lower Qinglong group was developed quite cmpletely here, and may be divided into three formations: Yinkeng formation Helong shan formation and Biandanshan formation.According to the variety of carbonate rocks, their sedimentary features and fossil assemblages, it is shown that Qinglong limestone of this area belongs to a system of coast-tidal flat and lagoon with some barriers. And we can subdivide it into eight subfacies. Through the study of vertical sequence and sedimentary patterns, the carbonate depositional cycle has been considered as a more ideal regressive one.On combined analysis of the data from field and laboratory, the authors have recognized that inclosed in the oncolite dolomitic sparite limestone ane dolomitic limestone on the intertidal bank are prospective reservoirs. Therefore, it is an important topic to research in to this kind of facies belts and their extension.

牛头山青龙灰岩是在温暖、浅水、以潮汐作用为主的碳酸盐台地上发育的中——低能沉积物,属有障壁的海岸——潮坪泻湖体系。依据其岩石类型、沉积特征及所含古生物,进一步可分出三个组合八个亚相。通过垂向相序及沉积模式的研究,表明它是一个海退的碳酸盐沉积旋回(序列)。结合区域性分析,广泛分布于苏、浙、皖三省的中下三迭统青龙灰岩具有自生、自储、自盖的成油组合,有良好的含油气远景。

 
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