- 更多网络例句与白垩相关的网络例句 [注：此内容来源于网络，仅供参考]
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The phenocrysts include ordinary augite and plagioclase and make up 35%-40% of the rock. The diabase has same 40Ar/39Ar platform and isochron age of 96-101 Ma within error limit, showing a formation age of the Albian-Cenomanian.
辉绿玢岩40Ar/39Ar同位素定年结果表明，其等时线年龄与坪年龄在误差范围内较为接近，该辉绿玢岩的形成时代介于96～101 Ma，即形成于早白垩世晚期-晚白垩世早期的Albian-Cenomanian阶。
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According to the principle of strontium isotope stratigraphy, we attempt to determine the age of the boundaries for Campanian/Santonian and Maastrichtian/Campanian by 87Sr/86Sr ratios for Gamba section in southern Tibet.
在与国际上同期海相地层锶同位素演化曲线对比的基础上，研究了晚白垩世海相碳酸盐锶同位素组成与主要地质事件的关系；在将本研究锶同位素数据融入到全球中新代海水锶同位素曲线的基础上，综合作出了中新生代海平面变化和锶同位素对照曲线，讨论了全球风化速率，造山事件，气候，海平面变化以及灾变性事件对中新生代海水锶同位素的控制作用；根据锶同位素地层学原理，本研究尝试将碳酸盐锶同位素组成用于海相地层定年上，利用已有的全球海水87Sr/86Sr值-年龄数据库和测试的藏南晚白垩海相碳酸盐的87Sr/86Sr值，确定了岗巴剖面Campanian/Santonian和Maastrichtian/Campanian阶界线，标定了广泛分布于白垩纪的厚壳蛤化石的年龄；本研究还将这些方法推广到了塔里木盆地井下奥陶纪地层的年龄标定，确定了中/上，中/下奥陶统界线，从锶同位素角度获得了古岩溶作用证据，显示锶同位素地层学在解决海相地层对比，年龄确定及在岩溶型油气储层研究中的潜在价值和良好应用前景。
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Soil in the Champagne region is either chalky or a clay-chalk mixture.
香槟区的土壤为白垩土或陶土和白垩土混合两种。
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Four potential exploration targets are: Drape and extruding anticline traps in the source rock drainage area in Chonta Formation in central-western basin; Traction and extruding anticline traps in the source rock drainage area in Pucara Group in central-southern basin; Pucara Group carbonate traps in central basin; Upper Cretaceous lithologic traps and Upper Paleozoic structural-stratigraphy traps in the northern and eastern exploratory area.
有潜力的勘探领域包括中西部白垩系Chonta组烃源岩供油区域的披覆和挤压背斜圈闭，中部和南部侏罗系Pucara群烃源岩供油区域的牵引背斜圈闭和挤压背斜圈闭，中部的Pucara群碳酸盐岩圈闭，北部和东部成熟探区上白垩统岩性圈闭和上古生界构造-地层圈闭。
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Basal synthem is the Taishan mountain group in archaean, is mainly the gneiss; The paleozoic synthem besides the regional lost stratas: Upper Ordovician, Silurian-Devonian and Lower Carboniferous, other stratas have the distribution, divides into Cambro-ordovician and Permo-Carboniferous two structure subgroups. Cambro-ordovician is a set of carbonate construction, Permo-Carboniferous system is a set contains the coal clastic rock deposition; In the mesozoic synthem lost Upper Triassic and Upper Crataceous ,growth Middle-Lower Triassic and Middle-Lower Jurassic and Lower Crataceous three structure subgroups, main growth varicolored land facies clastic rock, discovered rich fossil data such as cryptogam ,Ostracoda and Chareae and so on.
基底构造层指太古界泰山群，主要为片麻岩；古生界构造层除区域性缺失的上奥陶统、志留-泥盆系和下石炭统外，其余地层均有分布，分为冷武-奥陶系和石炭-二叠系两个构造亚层，冷武-奥陶系为一套碳酸盐建造，石炭-二叠系为一套含煤碎屑岩沉积；中生界构造层缺失上三叠统和上白垩统，发育下-中三叠统、下-中侏罗统和上侏罗-下白垩统三个构造亚层，为杂色陆相碎屑岩，发现丰富的孢粉、介形类、轮藻等化石；新生界古近系岩性以砂泥岩互层为主，含薄层油页岩，新近系-第四系为一套河流相沉积。
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Ma (early epoch of early Cretaceous) mafic dikes from south and north Jiangxi province, respectively, are available to comparative geological and geochemical discuss reveal that they are related to curst extension event and distinguish between rock series and trace element and isotopic characteristics of mafic dikes from south and north Jiangxi.
对赣南大吉山地区和赣北地区早白垩世基性岩脉的地质地球化学特征进行了系统的研究，表明它们可能代表中国东南部早白垩世初存在一次重要的岩石圈伸展和地壳拉张事件。
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Dawsonite of Mesozoic strata in Northeast China and adjacent area distribute in Lower Cretaceous strata from Hailaer basin,Tamtsag basin, Erlian basin, Kailu basin and Fuxin basin, and Upper part of Lower Cretaceous and Lower part of Upper Cretaceous from southern Songliao basin.
东北及邻区中生代地层中的片钠铝石分布于海拉尔盆地、塔木察格盆地、二连盆地、开鲁盆地和阜新盆地的早白垩世地层及松辽盆地南部的早白垩世晚期-晚白垩世早期地层中。
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These tests show that: 1. suction decreases with the increase of the water saturation in the chalk; 2. stress variants proposed are available for describing the stress state of the unsaturated chalk; 3. preconsolidation pressure increases with suction, while the effects of suction on the compressibility coefficients λ and κ are not evident; 4. as usual unsaturated soils, the permeability to oil of chalk increases with the suction; 5. yield strength of the chalk behaves with volumetric strain hardening; 6. cohesive behaviour of the chalk is related to the stress level, and relation between time-dependent deformation and logt is linear; 7. cohesion of the chalk decreases with the increase of the suction, while the elastic stiffness and the cohesion coefficient increase; 8. strength and elastic modulus increase with the strain rate, while the strain at the peak strength decreases with the increase of the strain rate.
试验结果表明，白垩中的虹吸力随水饱和度的降低而提高；吸力、水饱和度和强度的变化过程均与时间有关；可用由理论分析得到的应力状态变量描述非饱和白垩的平衡状态；前期固结压力随吸力增加而提高，而压缩指数λ与κ则同吸力无关；应力大于前期固结压力时，粘性变形与时间的对数关系曲线呈线性关系，其大小和增长速率均随吸力减小而增大，可视为白垩弹性刚度降低和粘性系数增大的结果；前期固结压力和变形模量随着应变速率的提高而提高，压缩指数κ和λ则随应变速率的提高而减小；应变速率较低时，粘性和吸力对前期固结压力及压缩指数的影响较小；白垩中油的渗透性随着吸力增加而提高；白垩在屈服阶段具有明显的体积应变硬化特性。
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The second group are the mixtures of Jurassic coal-formed oils and Cretaceous-derived oils. The carbon isotope, n-alkanes and isoprenoids compositions of these oils are similar to core extracts from Jurassic coal measures. However, sterane and terpane compositions of these oils show affinity to Cretaceous source rocks. It is deduced that coal-formed oils dissolved the biomarker-rich Cretaceous bitumen of relatively low thermal maturity, and overprinting occurs during oil migration.
第二类原油具有侏罗系煤系烃源岩与白垩系湖相泥质烃源岩混源的特点，这类原油的碳同位素组成、正构烷烃分布特征和姥植比等均表现出煤成油的特征，但甾、萜烷烃类化合物组成与白垩系烃源岩接近，推测是由于侏罗系煤成油在向上运移成藏过程中，受到成熟度相对较低、生物标志物相对丰富的白垩系烃源岩的浸析作用所致。
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The results are shown as below.1 Tectono-thermal evolution: The history of the Songliao basin is divides into four stages, high-temperature doming and extension, high-temperature rifting, low-temperature depression, and low-temperature shrinkage. Numerical simulation of mechanical process shows that the basin appeared in the early- to late- Jurassic as a result of rapid low-angle subduction of the Pacific plate towards the northwest, of movement of the Siberian block towards the southeast, of many other influences such as internal thermal stress in the mantle, gravitational force, stress of phase transition, etc. Both the Pacific plate and the Siberian block slowed down in the early Cretaceous, and almost stopped in the middle Cretaceous with the rapid decrease of abnormal heat in the mantle below.
盆地构造热演化力源机制数值模拟研究表明：早、中侏罗世至晚侏罗世晚期，盆地演化主要是太平洋块体向北西方向以低角度快速俯冲和西伯利亚块体向东南俯冲共同作用的结果，同时也与地幔内部热力、重力、相变力以及地球自转及公转速度变化效应和上覆块体绝对运动的作用有关；早白垩世早期至早白垩世中期，来自东部太平洋块体俯冲作用的减弱，而这一时期影响盆地演化的主要力源是地幔内部热力、重力、相变力以及地球自转及公转速度变化效应和来自西伯利亚块体俯冲作用；进入早白垩世晚期至晚白垩世早期，由于双重俯冲带中西侧俯冲作用带基本停止活动，而本区地幔热能的快速衰减则控制盆地的构造热演化；晚白垩世晚期以后，太平洋块体活动加强和地幔热运动是影响盆地演化的主要动力。
- 更多网络解释与白垩相关的网络解释 [注：此内容来源于网络，仅供参考]
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prepared chalk：研细白垩 沉降白垩 精制粉笔
ketal 酮缩醇 缩酮 | prepared chalk 研细白垩 沉降白垩 精制粉笔 | warsong 军歌
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chalkstone：白垩
chalk 白垩 | chalkstone 白垩 | chalky soil 白垩土
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Chalky：白垩质的
chalky porosity 白垩状孔隙 | chalky 白垩质的 | challenge 挑战;提出异议
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chalky soil：白垩质土壤
chalk 白垩 | chalky soil 白垩质土壤 | chamaephytes 地上芽植物
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chalky clay：白垩质粘土
chalkstone 白垩 | chalky clay 白垩质粘土 | chalky porosity 白垩状孔隙
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graphotype：白垩板,白垩凸版
图解静力学 graphostatics | 白垩板,白垩凸版 graphotype | 抓泥机 grapple
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chalklike：似白垩的, 似粉笔的
chalkiness | 白垩, 白垩质, 白色 | chalklike | 似白垩的, 似粉笔的 | chalkogenide | 硫属化物
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Creta：白垩漂白土
cresylite | 甲苯炸药, 甲酚盐 | creta | 白垩漂白土 | cretaceous | 白垩的, 白垩纪的 白垩纪, 白垩系
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chalk plant：白垩植物(石膏植物)
chalk pit || 白垩矿场 | chalk plant || 白垩植物(石膏植物) | chalk powder || 白垩粉 碳酸钙
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chalkpit：白垩矿场
chalkoverlaypaper 白垩纸 | chalkpit 白垩矿场 | chalkpowder 白垩粉