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射线衍射分析测试方法对鸡西盆地张新地区浅成岩侵入后上下盘砂岩储层中的粘土矿物进行分析,粘土矿物具有3种组合形式：①伊蒙混层＋伊利石＋绿泥石±高岭石±绿蒙混层组合;②伊利石＋绿泥石±伊蒙混层组合;③伊蒙混层＋高岭石＋伊利石＋绿泥石组合。上盘围岩伊利石平均相对含量随远离辉绿玢岩体的距离增大而减少,伊蒙混层、高岭石、绿泥石平均相对含量增大;下盘围岩伊利石、高岭石、绿泥石平均相对含量随远离辉绿玢岩体的距离增大而增加,伊蒙混层平均相对含量减少。伊利石和高岭石相对含量的增加与其对孔隙度的影响效果相反;伊利石和绿泥石相对含量的增加对渗透率的影响效果相反。 相似文献
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蒙脱石+伊/蒙混层+伊利石等粘土矿物混合物相X射线定量分析方法—模拟定量法 总被引：3，自引：0，他引：3
本文提出粘土矿物(特别是含伊/蒙不规则混层粘土矿物)混合物相的X射线定量分析方法——模拟定量法。着重解决在蒙脱石-不规则伊/蒙混层粘土矿物-伊利石组合中,伊/蒙混层粘土矿物的定量分析计算。模拟定量法是对以前的各种粘土矿物X射线定量分析方法的补充。用纯净的蒙脱石、伊利石、高岭石、绿泥石及各种伊/蒙混层比的伊/蒙混层粘土矿物,配制了各种不同组合的粘土矿物混合样品,制成定向薄膜片,进行了X射线分析,讨论了各种组合的粘土矿物混合物相X射线衍射图谱的特征,并在此基础上提出了粘土混合物相定量分析的方法。 相似文献
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应用差热分析，Ｘ衍射分析，透射电镜等测试手段，结合野外沉积环境，地球化学分析，对安徽两淮煤田石炭二叠系粘土矿物进行了系统的研究，主要粘土矿物有伊利石及其混层矿物，高岭石，绿泥石等，可划分为５种组合类型，即伊利石一伊／蒙混层一绿泥石组合，伊利石一伊／蒙混层组合，伊利石一伊／蒙混层一高岭石组合，高岭石一伊／蒙混层一伊利石组合的高岭石组合。不同的组合类型代表着一定的沉积环境和盆地水介质条件。其结构同其它 相似文献
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利用X射线衍射等分析方法,对贵州威宁麻窝山岩溶盆地沉积物中粘土矿物进行研究,获得了粘土矿物的组成、相对含量、结晶度指数、化学指数以及相对含量比值等方面的信息,探讨该盆地的沉积环境演化特征。研究表明,粘土矿物以伊/蒙混层矿物(30%~75%)和绿泥石(10%~45%)为主,高岭石(5%~20%)和伊利石(10%)次之,基本不含蒙脱石。伊/蒙混层矿物和绿泥石含量呈负相关性。高岭石含量在剖面底部较稳定,在484cm上部出现较大的波动。伊利石结晶度和化学指数与伊/蒙混层矿物含量具有较好的正相关性,且在第Ⅰ阶段相对于其它指标较敏感,出现波动。通过综合对比分析,将研究区剖面划分为4个阶段,其是3个冷暖干湿的大循环和若干个小循环气候环境的物质记录。 相似文献
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在柴达木盆地阿尔金斜坡第三系地层中,砂岩中碳酸盐重结晶强烈、压实程度弱、石英自生加大较弱、早期碳酸盐胶结物发育。碳酸盐主要为无机成因,少量与生物气有关,其含量受盐度的影响。泥岩中粘土矿物以伊利石、绿泥石和伊蒙混层为主,缺少蒙脱石和高岭石,随埋深增加,伊利石相对含量变化无规律可循,绿泥石相对含量减少,推测伊利石主要为陆源成因。 相似文献
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在柴达木盆地阿尔金斜坡第三系地层中,砂岩中碳酸盐重结晶强烈、压实程度弱、石英自生加大较弱、早期碳酸盐胶结物发育。碳酸盐主要为无机成因,少量与生物气有关,其含量受盐度的影响。泥岩中粘土矿物以伊利石、绿泥石和伊蒙混层为主,缺少蒙脱石和高岭石,随埋深增加,伊利石相对含量变化无规律可循,绿泥石相对含量减少,推测伊利石主要为陆源成因。 相似文献
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根据岩石薄片、Ｘ衍射和扫描电镜分析资料,本文研究了巴州坳陷下白垩统—中侏罗统粘土矿物特征,发现粘土矿物分为伊利石、伊／蒙混层和绿泥石三种类型。粘土矿物的类型和含量随深度而变化,形成了伊／蒙混层带、混层迅速转化带和伊利石带。粘土矿物的转化和自生粘土矿物的形成是沉积地层非常重要的成岩变化。 相似文献
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海南岛周边海域表层沉积物中粘土矿物组合及其气候环境意义 总被引：1，自引：0，他引：1
X射线衍射分析结果显示,海南岛周边海域表层沉积物中粘土矿物主要由伊-蒙混层矿物、伊利石、高岭石和绿泥石等组成,其含量分别为34.2%,27.3%,21.1%和17.4%。采用人工判别分区和Q型聚类分析分区相结合的方法,将研究区按粘土矿物的相对含量和分布水深,划分出3个粘土矿物组合区,各分区的矿物组合特点显示它们的赋存现状受控于各种粘土矿物本身的粒度、形态特征、水动力条件和水深等因素。在南海海域首次鉴别出有较高含量的伊-蒙混层矿物存在,根据前人对伊-蒙混层矿物、伊利石和高岭石所指示气候条件的研究结果和本研究区内这些表层粘土矿物的含量、组合特征,判断海南岛及周边区域1 500 a以来一直处于比较温湿的气候环境。 相似文献
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探讨了渤中坳陷石臼陀凸起东段CO2来源及CO2充注对储层粘土矿物的影响.研究表明,CO2中δ13C组成较重,R/Ra值较大,CO2为幔源成因;控盆的深大断裂是CO2的主要运移通道;CO2热流体晚期充注对砂岩储集层粘土矿物产生了明显的影响:CO2热流体侵位后形成的热波动效应加快了储集层中伊蒙混层粘土的演化,含CO2储集层中伊蒙混层中蒙脱石含量要比同深度的泥岩低15％ ～30％;CO2热流体晚期侵入加剧了长石的溶蚀作用,长石溶蚀促进了自生高岭石的大量形成;CO2热流体侵位后形成的偏酸性环境抑制伊利石生长,促进了其他粘土矿物向高岭石转化;含CO2储集层以少见的高自生高岭石、低伊利石为特征,这对储层物性改善起到了决定性的影响. 相似文献
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Guboglo M. N. 《GeoJournal》1980,4(1):53-58
International unity is becoming ever stronger in this country owing to an increasing similarity in the development of the cultural environment. This comprises the provision of all the country's republics with a sufficient number of schools, theatres, and other institutions and cultural information media in accordance with the needs of the population. An important part is played by the rise in ‘the general educational level, as well as the level of professional qualifications and skills. Among all the Soviet nations and nationalities, this rise being more rapid among formerly backward peoples. Prominent among the factors of internationalization is the progressive development of the nationalities’ cultural resources, while professional culture is being increasingly brought within the reach of the masses.The implementation of the nationalities policy promotes the all-round development of all Soviet nations and nationalities, their drawing together, the upsurge of the individual capabilities of every Soviet citizen. 相似文献
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Deviation of the major axis of the inertia ellipsoid of the Moon from the direction toward the Earth
B. P. Kondratyev 《Astronomy Reports》2017,61(8):709-714
It is known from observations that the center of mass of the Moon does not coincide with the geometric center of its figure, and the line connecting these two centers is not aligned with the direction toward the center of the Earth, instead deviating toward the Southeast. This stationary deviation of the axis of the inertia ellipsoid of the Moon to the South of the direction toward the Earth is analyzed. A system of five linear differential equations describing the physical libration of the Moon in latitude is considered, and these equations are derived using a new vector method taking into account perturbations from the Earth and partly from the Sun. The characteristic equation of this system is obtained, and all five oscillation frequencies are found. Special attention is paid to the fifth (zero) frequency, for which the solution of the latitude libration equations are stationary and represents a previously unknown additional motion of the rotational axis of theMoon in a cone with a small opening angle. In contrast to the astronomical precession of the Earth, the rotation of the angular-velocity vector is in the positive direction (counter-clockwise), with the period T 3 = 27.32 days. On this basis, this phenomenon has been named “quasi-precession.” This quasi-precession leads to a stationary inclination of the major axis of the inertia ellipsoid of theMoon to the South (for an observer on Earth), making it possible to explain one component of the observed deviation of the center of mass of the Moon from the direction toward the Earth. The opening angle of the quasiprecession cone is approximately 0.834″. 相似文献
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Chronological analyses of correlations between certain global repeating events (mass extinctions of marine organisms, meteorite impacts, and flashes in the frequency of geomagnetic reversals) during the Phanerozoic Eon and the motion of the solar system in the Galaxy are presented for five rotationally symmetrical models for the regular Galactic gravitational field. Thirteen of sixteen mass-extinction events can be described by a repetition interval of 183±3 million years. This is in agreement with the anomalistic period (interval between two subsequent passages of the Sun through the apocenter of its Galactic orbit) in the model of Allen and Martos. The positions of the minima and maxima in Gaussian functions approximating the frequency distribution for geomagnetic reversals also agree with the times of passage of the Sun through the apocenter and pericenter, respectively, of its Galactic orbit in this model. The maximum in the distribution of the deviations of the dates of mass extinctions from the nearest dates of impacts of large, crater-forming bodies is close to zero, providing evidence that many such events are correlated. As a rule, extinctions follow impact events. The impacts of large bodies have occurred most often when the solar system passes through the Galactic plane, while mass extinctions occur more often at some distance from the Galactic plane (about 40 pc). As a rule, intervals of increases in the frequency of geomagnetic reversals coincide with dates of impacts of large bodies. At the same time, these intervals do not show a clear correlation with the dates of mass extinctions. The intensity of mass extinctions, like the energy released by impacts, is consistently higher in periods when the Sun is moving from the apocenter toward the pericenter of its orbit, than when it is moving from the pericenter toward the apocenter. Thus, there is evidence for a variety of relationships between repeating global events in the Phanerozoic and the motion of the Sun in the Galaxy. Long-period variations in the frequency of geomagnetic reversals are correlated with the orbital motion of the Sun, and increases in the frequency of geomagnetic reversals are correlated with impacts. Mass extinctions are correlated with the impacts of large bodies, whose motions may have been perturbed by clouds of interstellar material concentrated toward the Galactic plane and by the shock front associated with the Perseus spiral arm, through which the solar system passes. The velocity of the Sun relative to the spiral pattern is estimated. 相似文献
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摩擦桩基桩土间极限摩阻力取值问题探讨 总被引：1，自引：0，他引：1
通过对广珠东线高速公路横沥大桥的试桩及土体的工程地质条件分析,总结出影响摩擦桩基桩土间极限摩阻力取值的一般问题以及解决问题的方法和措施。 相似文献
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位于华北和扬子两板块碰撞带中的苏鲁榴辉岩形成的温压条件不但是超高压，而且是高温。榴辉岩的PTt轨迹表明其为陆-陆磁撞俯冲带的产物。榴辉岩的区域性围岩花岗质片麻岩为新元古代同碰撞期花岗岩，榴辉岩及其他直接围岩皆呈包体存在于其中，并见新元古代花岗岩呈脉状侵入榴辉岩包体中。区域性围岩新元古代花岗岩的锆石中发现有柯石英、绿辉石等包裹体，表明新元古代花岗岩的组成物质也经受过超高压变质作用，且榴辉岩与围岩新元古代花岗岩的锆石U-Pb体系同位素年龄基本相同。但新元古代花岗岩所记录的变质作用和变形作用期次（或阶段）却少于榴辉岩。椐上述可得如下推断：超高压榴辉岩与新元古代花岗岩岩浆是同时在碰撞带底部（俯冲板块前部）形成的；榴辉岩的第一折返阶段是由新元古代花岗岩岩浆携带上升的，其第二折返阶段是和新元古代花岗岩一起由逆冲及区域性隆起而上升，遭受剥蚀。 相似文献
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某高速公路下伏煤矿采空区稳定性分析 总被引：10，自引：0，他引：10
在论述某高速公路下伏砦脖煤矿采空区地质、采矿和工程地质特征的基础上, 进行了稳定性数值模拟分析, 定性与定量地分析与评价了该煤矿采空区的地表变形特征及稳定性。研究结果表明: 该煤矿采空区的变形尚未完成, 对拟建的高速公路将产生很大的危害, 必须采取相应的工程治理措施。 相似文献
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The structure of the eastern Pyrenees consists mainly of south-directed thrusts involving basement and cover rocks. An antiformal stack developed by the piling up of basement thrust sheets which outcrop in the Axial zone. These structures account for a thin-skinned thrust model rather than a vertical fault model in which the Axial zone would be essentially autochthonous, and the North-Pyrenean fault the axial plane of a fan thrust system. New data from the Eastern Pyrenees and the thin-skinned model suggest that(1) the structure east of the Pedraforca nappe is similar to that of the Central Pyrenees; (2) the cover rocks of the South-Pyrenean units and of the Axial zone-after restoration—built up a northwards-thickening prism consistent with the existence of a unique Pyrenean sedimentary basin during Mesozoic time; (3) the Axial zone is only a complex antiformal stack developed as a part of South-Pyrenean system related to the Paleogene thrusting-tectonics. The Axial zone palaeogeographic area had no special meaning during Mesozoic time. 相似文献
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Michel Westphal Mikhail L. Bazhenov Jean Paul Lauer Diamar M. Pechersky Jean-Claude Sibuet 《Tectonophysics》1986,123(1-4)
We first re-examined the apparent polar wander curves for stable Eurasia and Africa since the Triassic. These curves were then combined together with curves of North and South America according to the kinematics of the Atlantic ocean and a synthetic polar wander curve was given. Then, most of the paleomagnetic results from the Tethys mobile belt, from the Atlantic to the Pamirs, were analysed.Several groups of plates, microplates and blocks can be seen. First, relatively stable regions like Maghreb and Sicily, which have not moved much. Then we have a group formed by Iberia, Sardinia, Italy and, to a lesser extent, Corsica and the Western and Central Alps. For these blocks, movements are anticlockwise rotations chiefly driven by the anticlockwise rotation of Africa, but they are sometimes stronger.To the east, a major change takes place. The north of the Aegean Sea and the Ionian zone are clockwise rotated and these rotations are recent: Oligocene-Miocene for the first part, Pliocene to the present for the second part.A major problem arises in Turkey, Caucasus and Iran. Paleomagnetic results indicate a position far to the south of Eurasia, and, at the same time, geological evidence is in favour of a position close to Eurasia. We discuss these discrepancies. 相似文献