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permian period
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  二叠纪
     Based on the above, the paper also elaborates systematically the evolution of δ13C and δ18O in the Permian marine carbonate rocks and its relation with sea level change and establishes the evolution curves of the carbon and oxygen isotopes in the Permian period.
     在此基础上系统阐述了整个二叠纪海相碳酸盐岩的δ13C和δ18O的演化与海平面升降的关系,第一次系统建立了二叠纪古海洋碳酸盐岩的碳、氧同位素演化曲线。
短句来源
     In the Carboniferous to Permian period,geothermal gradient increased,and could be up to 3~3.2℃/100 m.
     石炭—二叠纪古地温略有上升,地温梯度可能达到3~3.2℃/100m;
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     The whole rock Rb-Sr and single-grain Cr dating of correlated lithesome in Bingdaban DSZ infer that the end of early period mid-deep ductile shear deformation is about 302Ma, and then the second mid-shallow brittle-ductile shear strain probably lasts to the end of Permian period, brittle deformation superimposes on top of it.
     冰达坂剪切带内相关岩体全岩Rb-Sr和单颗粒锆石测年得出,早期中深部韧性剪切变形结束的时间约为302Ma左右,紧接着中期中浅部脆-韧性剪切变形可能持续到了二叠纪末期,之后为脆性变形叠加。
短句来源
     After the study of the distribution law of S, Fe, As, Cd, Hg, Pb, Se,Sb, Tl and Zn in coal seams of the Longtan Group of the Permian Period in Guizhou Province, multivariable analysis was used in the study of correlations among these elements in the coal seams. From the correlations among these elements and the elemental geochemistry of these elements, we got some useful information about the possible modes of occurrence of these elements in coal seams of the Longtan Group in Guizhou.
     在对贵州省二叠纪龙潭组煤层中 S、Fe、As、Cd、Hg、Pb、Se、Sb、Tl和 Zn分布规律进行讨论的基础上 ,作者运用多元分析方法研究了这些潜在毒害元素的相关关系 ,并结合元素地球化学知识给出了这些元素在煤中赋存状态的信息。
短句来源
     In the Late Carboniferous and Permian Period, the location of Ordos Basin was at around 20°N with widespread limnogenic deposits,being important source rocks of Coal-oil and coal-gas.
     晚石炭世-二叠纪,盆地处于北纬20°左右地区,广泛发育的湖沼相沉积地层是煤成油、气的主要源岩层;
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  二迭纪
     Permian Period
     二迭纪
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     From Devonian of Palaeozoic to early Mesozoic,there were 11 orders of Ptmdosperma found from the Cathaysian ancient land,amongthem,the Gigantopteris and GlossOpteris were fully developed at Permian Period,andwere supposed relative with Angiosperm.
     自泥盆纪以来,在华夏各古陆出现了11群的种子碳,组成了古生代的华夏植物区系,它们当中的大羽羊齿类Gigantopterides及舌羊齿类Glos-sopterides到了二迭纪达到了全盛的时期。
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  “permian period”译为未确定词的双语例句
     enrichment of Cu、Zn、Hg、Sb during the Permian period;
     二叠系富集Cu、Zn、Hg、Sb;
短句来源
     Analysis on peat's reserves in later permian period of Guizhou
     贵州省晚二叠世泥炭储量分析
短句来源
     The sequential extraction tests were carried out using 32 coals sampled from Longtan Group of Permian Period in Guizhou Province. Eight coal samples gathered from the same area were divided into 10 density fractions between <1.4 and >2.8×10 3? kg·[JX-9]m -3 by separation in heavy liquid mixture.
     对采自贵州省二叠系龙潭组煤层的 32个煤样进行了连续化学浸取实验研究 ,并利用重液分离方法 ,将另外 8个采自同一地区的煤样按密度从 1.4至 2 .8× 10 3kg m3分成 10个密度段。
短句来源
     Based on the study of the features of both the quartz photoaxis fabric and the two-dimensional finite strain of the sandstone of Permian period in different tectonic province of Liu Qiao mining by useing the method of micro-analysis,this paper concluds that the direction of stress field in the area is about SE116° and is accompanied by clockwise rotation, which tallies with the regional tectonic analysis.
     据刘桥井田不同构造块段二叠系砂岩石英光轴组构特征及二维有限应变特征的研究,通过微观分析,得出本区应力场方向为SE116°左右,并伴有顺时针旋转,其结论与区域构造分析相吻合。
短句来源
     Significance of study on features of micro-fabric of sandstone of Permian period in Liuqiao Mine
     刘桥井田二叠系砂岩显微组构特征及其研究意义
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  permian period
The deposition of the salt is thought to have occurred during the Permian period (225-280?million years ago).
      
The youngest (Permian) period of magma generation contains the intrusion of the S-type Granatspitz Central Gneiss at 271?±?4?Ma and the extrusion of the rhyolitic Sch?nbachwald gneiss protolith at 279?±?9?Ma.
      
The mobility of 10 potentially toxic trace elements (PTTE), As, Cd, Cr, Cu, Hg, Ni, Pb, Se, Tl, and Zn from 32 coals of the Longtan Group formed in Permian Period in Guizhou Province, China was investigated using sequential extraction procedures.
      
The most significant mass extinction occurred 250 million years ago at the end of the Permian period.
      
Pangea was together during the Permian Period, approximately 250 million years ago, when the sea was present in Delaware Basin.
      
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By the geology-thermal evolution, the prospect of coal-formed gas resource in the southern part of North China basin is primarily discussed in this paper. After the formation of coal-series of Carboniferous and Permian Period. the basin was undergone by the strong Yenshan movement and the coal-formed gas had been seriously destroyed. According to the calculation, about 70% of the coal-formed gas has escaped. only 30% is preserved. But the guantity of effect resource is still large, the prospect is hopeful....

By the geology-thermal evolution, the prospect of coal-formed gas resource in the southern part of North China basin is primarily discussed in this paper. After the formation of coal-series of Carboniferous and Permian Period. the basin was undergone by the strong Yenshan movement and the coal-formed gas had been seriously destroyed. According to the calculation, about 70% of the coal-formed gas has escaped. only 30% is preserved. But the guantity of effect resource is still large, the prospect is hopeful.

本文从地质—热演化角度,对南华北盆地煤成气资源前景进行了初步探讨。在盆地中,石炭、二叠纪煤系形成后,曾经历了强烈的燕山运动,使生成的气遭到严重破坏。经估算约70%被逸失,约30%被保存。筛分后的有效资源量仍很可观,前景美好。

The division, feature, age and related problems of Palaeozoic plants in N. Xinjiang are given in this paper, as a supplement to the Late Palaeozoic plants recorded in the "Palaeontological Atlas of Xinjiang".The Late Palaeozoic plants in N. Xinjiang may be divided into six floras and ten plant assemblages. Ⅰ, Zosterophyllum Flora (L. Devonian) : 1, Zosterophyllum—Junggaria Assemblage (Gedinnian) ; No Siegenian—Emsian assemblage has been found so far. Ⅱ, Protolepidodendron Flora (M. Devonian): 2, Protolepidodendron—Psilophyton...

The division, feature, age and related problems of Palaeozoic plants in N. Xinjiang are given in this paper, as a supplement to the Late Palaeozoic plants recorded in the "Palaeontological Atlas of Xinjiang".The Late Palaeozoic plants in N. Xinjiang may be divided into six floras and ten plant assemblages. Ⅰ, Zosterophyllum Flora (L. Devonian) : 1, Zosterophyllum—Junggaria Assemblage (Gedinnian) ; No Siegenian—Emsian assemblage has been found so far. Ⅱ, Protolepidodendron Flora (M. Devonian): 2, Protolepidodendron—Psilophyton Assemblage (Eifelian) ; 3, Protolepidodendron—Lepidosigillaria Assèmblage (Givetian). Ⅲ, Leptophloeum Flora (U. Devonian): 4, Sublepidodendron—Colpodexylon Assemblage (Frasnian in N. Junggar) ; 5, Leptophloeum—Sublepidodendron Assemblage (Famennian in N. Junggar; U. Devonian in S. Junggar and Tianshan). Ⅳ, "Lepidodendropsis Flora" (L. Carboniferous): The Tournaisian aspect is not clearly shown as only some Lepidodendropsis, Sublepidodendron and pith casts of articulatae have been found; 6, Lepidodendron—Lepidodendropsis Assemblage (Visean and Namurian E). Ⅴ Angaropteridium Flora (U. Carboniferous—L. Permian): 7, Angaropteridium—Mesocalamites Assemblage (The basal part of U. Carboniferous, corresponding to Namurian H+ R); The Namurian G—Stephanian assemblage 's aspect is not clearly shown, although Calamites is plenty and Noeggerathiopsis occurs quite frequently; 8, Noeggerathiopsis—Walchia Assemblage (L. Permian in Tianshan) ; 9, Angaropteridium—Zamiopteris Assemblage (L. Permian in Junggar). Ⅵ, "Callipteris Flora" (U. Permian) : 10, Callipteris—Comia Assemblage (U. Permian).The Zosterophyllum Flora ranging from the Pridolian to Emsian is widespread over Eurasia and Australia. The Zosterophyllum—Junggaria Assemblage in N. Xinjiang corresponds in age to the Gedinnian of Europe. The later assemblage of the Zosterophyllum Flora has not been found yet, owing to the broad marine transgression in the Siegenian—Emsian.The Protolepidodendron Flora, Leptophloeum Flora and "Lepidodendropsis Flora" reflect three developmental stages of the primitive, advanced and perfected Lycophytes. The latest flora is more widespread in the world, while the first and second ones may be compared with the Eifelian—Givetian and Frasnian—Famennian floras dominated by the Lycopsida in the East and Central Asia, Australia and some places of N. America.In the Angara province, the Angaropteridium Flora and "Callipteris Flora" are of heterogenic character derived from the "Lepidodendropsis Flora" and the Early Permian flora of the Cathaysian—Euramerian provinces. Both these floras are common in the Angaraland, and it is difficult to compare them directly with contemporaneous floras in other provinces.The palaeogeographic and palaeoclimatic changes in Late Palaeozoic directly influenced the floral distribution. Because of the separation of the Ural—Sinomongolian Sea in the Late Carboniferous Epoch, the Angara and Cathaysian—Euramerian provinces started to develop parallelly under different palaeoecological conditions. Following the gradual closure of the sea area and the gradual union of the southern and the northern land in the Permian Period, there was an increasing tendency to produce floras of mixed characteristios. With rapid continental enlargement in Late Permian, the floristic distributive area of the Angara province extended toward the southwest and overlapped that of the Early Permian Cathaysian province.

此文介绍了新疆北部晚古生代植物群的划分、特征,从而讨论其地质时代及植物群的时、空分布规律等问题。

Repeated subduction of SN ocean crust under the North China continental crust and encroachment of sea water, and frequent rise and fall of the continental crust and alternate emergence of land and sea that created a swampy environment from early Paleozoic to late Permian contributed to the formation of conditions favo- urable for coalification. The difference of the magnitude of uplifting and subsi- dence between the southern and northern parts of North China and the ultimate downsinking of its central...

Repeated subduction of SN ocean crust under the North China continental crust and encroachment of sea water, and frequent rise and fall of the continental crust and alternate emergence of land and sea that created a swampy environment from early Paleozoic to late Permian contributed to the formation of conditions favo- urable for coalification. The difference of the magnitude of uplifting and subsi- dence between the southern and northern parts of North China and the ultimate downsinking of its central part laid the foundation of a depositional center in C- entral North China during the middle and early Triassic. It is pointed out that while they had undergone different process of develop- ment, the geologic structures of middle and lower Triassic owed their character to events occurring during the Carboniferous and Permian periods. The coal gas of Carboniferous and Permian periods was closely related to the Triassic B- asin because the katogenic metamorphism of coal beds was largely completed by theend of Triassic. But, subsequent tectonic episodes occurring in the Triassic Bssin brought about many changes in its geologic features. All these must be taken into account in the study and exploration for coal gas. It is believedthat the most promising area for coal gas exploration is in the south of the Longhai railway where the thickness of coal measure approaches 1,000 meters.

华北地区从早古生代时期至晚二迭世末期,经受几次南北向洋壳对华北陆壳的俯冲消减以及海水侵入,陆壳抬升与沉降频繁,海陆交替频繁,多次出现沼泽环境,给成煤造成有利条件。华北的南部及北部抬升与沉降的幅度不完全一致,但最终是南北部隆起,中部下沉,因此,华北中部是中下三迭统的沉积中心。中、下三迭统与石炭二迭系在发育史上既有不同点,又有明显的继承性。石炭二迭系煤成气之所以与大型三迭系盆地有密切相关,是因为煤层之一次深成变质主要完成于三迭纪末,但三迭系盆地在燕山期及喜山期又遭到了许多新的构造运动的影响,产生了许多新特点,已不是原来的盆地面貌,对煤成气进行勘探与研究中,对所有构造运动的影响均应加以考虑。在华北地区一般认为找气最有希望的地区是陇海线以南的南华北,该区煤系地层(太原组-上石盒子组)发育,厚度近千米,煤层累厚10-50米,成气物质雄厚,而北华北煤系地层(本溪组-山西组)厚度不足300米,煤层累厚5~25米,成气物质基础不如南华北煤系地层。

 
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