共查询到20条相似文献，搜索用时 62 毫秒
1.
冀东高级变质岩石的流体包裹体研究 总被引：5，自引：5，他引：5
冀东高级变质的石榴石斜长片麻岩、含或不含石榴石的角闪二辉斜长片麻岩、紫苏花岗岩、斜长角门岩等岩石中的流体包裹体主要有４类，按形成的先后顺序依次为：（１）Ｈ２Ｏ和ＣＯ２两液相包裹体，ＣＯ２的部分均一温度是－１２℃，密度１．０４ｇ／ｃｍ３，Ｈ２Ｏ含量２１％～３９％（ｍｏｌｅ％），ＣＯ２含量５０％～７１％（ｍｏｌｅ％）；（２）ＣＯ２液相包裹体，冰点温度－５６℃～－６１℃，均一温度－７．４℃～－３５．１℃，ＣＯ２密度约为１．０５ｇ／ｃｍ３，ＣＯ２含量８２．１％～９８．４％（ｍｏｌｅ％），还有少量的ＣＨ４、Ｎ２和Ｈ２等组分；（３）Ｈ２Ｏ和ＣＯ２多相包裹体，ＣＯ２的部分均一温度７℃～２８℃，ＣＯ２密度为０．６４～０．９３ｇ／ｃｍ３，气相组分以ＣＯ２、ＣＨ４和ＣＯ为主，液相成分主要是Ｈ２Ｏ和ＣＯ２；（４）多世代盐水溶液包裹体，冰点温度－０．５℃～－２０℃，盐度０．８７％～２２．８％（ｗｔ％），盐水密度０．７～１．０５ｇ／ｃｍ３，均一温度在１５０℃～２００℃和约３００℃，存在两个峰值。不同世代的流体包裹体记录了等密度降温的Ｐ－Ｔ路径。包裹体反映的变质作用早期降温过程流体的Ｈ２Ｏ／Ｈ２Ｏ＋ＣＯ２（ｍｏｌｅ）比值降低，晚期升高 相似文献
2.
西天山阿希金矿流体包裹体研究 总被引：37，自引：0，他引：37
西天山阿希金矿含金石英脉仙流体包裹体粒度细小,形态多样,以单一液相为主。化学成分上属Ｋ＾＋（Ｎａ＾＋）－ＳＯ４＾２－（Ｃｌ＾－）型,其中阳离子成分以Ｋ＾＋为主,Ｎａ＾＋次之;阴离子成分以ＳＯ４＾２－为主,Ｃｌ＾－次之;气相成分以Ｈ２Ｏ、ＣＯ为主,富含Ｏ２、Ｎ２等气候,还原性气体（Ｈ２、ＣＨ４、ＣＯ等）含量亦较高。成矿作用发生于浅成（３００￣９００ｍ）、低温（１２０￣１８０℃）和较封闭的还原环境。成 相似文献
3.
4.
胜利油田火山岩中的流体包裹体成分及其意义 总被引：34，自引：3，他引：34
以激光拉曼探针分析了胜利油田火山岩中的流体包裹体成分。结果表明，各包裹体流体中的主要成分是二氧化碳，此外，还有Ｈ２Ｏ，Ｎ２，Ｈ２，ＣＨ４，Ｈ２Ｓ等组分。含二氧化碳气藏区的新生代火山岩的流体包裹体中含有较多的ＣＯ２，一般在６０％以上；而不含二氧化碳气藏区的火山岩的流体包裹体中含ＣＯ２较少，多在６０％以下。 相似文献
5.
中国东南沿海地区地幔岩包体中流体及熔体包裹体研究 总被引：10，自引：1，他引：10
浙江新昌和福建明溪地区新生代玄武岩中地幔岩包体矿物中的ＣＯ２包裹体和含ＣＯ２硅酸盐岩浆包裹体的研究表明，它们捕获于温度１２０７℃～１２６７℃和压力８１５～１１４７ｍｐａ条件下，约相当于３０～５０ｋｍ深的上幔环境；ＣＯ２包裹体流体成分是以ＣＯ２为主，有ＣＨ４、ＣＯ、Ｈ２Ｓ、Ｈ２Ｏ、Ｎ２、和Ｈ２等次要组分，代表地幔流体成分。含ＣＯ２硅酸盐岩浆包裹体均一后成分不同于寄主玄武岩，它富ＳｉＯ２、Ａｌ２Ｏ３、ＭｇＯ和Ｋ２Ｏ，贫ＦｅＯ和ＣａＯ，反映了未分异原始玄武岩浆的成分，它们可能是研究地区的地幔软流圈－岩石圈界面抬升，压力降低在地幔流体作用下发生的部分熔融作用的产物． 相似文献
6.
河台韧性剪切带金矿床成矿物理化学条件研究及熔融包裹体的发现 总被引：7，自引：0，他引：7
河台韧性切带金矿床产于震旦系－志留为质岩系深大断裂糜棱岩带中,本研究首次在矿床含矿石英脉及糜棱岩中发现熔融包裹体,流体－熔融包裹体及有机包裹体。不同类型包裹体均一温度,有机包裹体为１６０℃,成矿流体属Ｋ＾＋－Ｃａ＾２＋－Ｍｇ＾２＋－Ｎａ＾＋－ＳＯ４＾２－ＨＣＯ＾２－４－ＨＣＯ３＾－４－Ｃｌ＾－体系,具中偏碱性,微量气体特征：Ｈ２Ｏ〉ＣＯ２〉ＣＨ４〉（或〈）Ｈ２〉ＣＯ〉Ｃ２Ｈ２〉Ｃ２Ｈ６〉Ｏ２〉ＨＪ 相似文献
7.
新疆哈图金矿成矿流体地球化学 总被引：35，自引：3，他引：32
新疆哈图金矿床赋存在石炭系基性火山岩－火山碎屑岩中,矿体受古火山口断裂系控制。矿脉内流体包裹体较为丰富,主要为气液相ＮａＣｌ－Ｈ２Ｏ包裹体和少量的ＮａＣｌ－ＣＯ２－Ｈ２Ｏ包裹体。成矿热液中富含ＣＯ２、Ｎ２、Ｎａ＋、Ｋ＋、Ｃｌ－和ＳＯ２－４,而所含的成矿元素以Ａｕ－Ａｓ－Ａｇ－Ｓｂ组合为特征。成矿热液为低盐度流体,主成矿阶段的盐度为４．１ｗｔ％～６．３ｗｔ％ＮａＣｌ,密度为０．８８～０．８０ｇ／ｃｍ３,ｆＯ２为１０－３５～１０－３１Ｐａ,Ｅｈ为０．６０～０．８０ｅＶ,为还原环境。金沉淀成矿的最佳温度为２３０～２６０℃。哈图金矿成矿热液不是典型的岩浆热液,而是受到了古大气水混入的火山晚期热液。流体不混溶、水－岩反应及古大气水的混入是造成本区金沉淀成矿的主要因素。 相似文献
8.
小秦岭金矿流体包裹体挥发组分与金的矿化 总被引：3，自引：1，他引：3
小秦岭石英脉型金矿矿物包裹体中挥发组分以Ｈ２Ｏ和ＣＯ２为主，还有少量的ＣＨ４、ＣＯ、Ｈ２、Ｈ２Ｓ等。富金矿石中包裹体的ＣＯ２＞３０ｍｏｌ％．ＣＯ２／Ｈ２Ｏ＞０．４，而贫金矿石中包裹体的ＣＯ２＜２０ｍｏｌ％，ＣＯ２／Ｈ２Ｏ＜０．２。前者包裹体的气体成分中含有较多的ＣＨ４、ＣＯ和Ｈ２等还原性气体．表明这种金矿的成矿流体以富含ＣＯ２为特征，ＣＯ２含量的变化对金的富集起着重要作用．因此金矿石中矿物包裹体的ＣＯ２含量或ＣＯ２／Ｈ２Ｏ比值可以作为深部预测的主要判据之一，并应用于小秦岭金矿山已取得良好的效果。 相似文献
9.
10.
大别山双河和碧溪岭超高压变质岩流体包裹体研究 总被引：9，自引：2，他引：7
对大别山双河和碧溪岭含柯石英榴岩和硬玉石英岩进行了详细的流体包裹体研究。根据流体包裹体的成分和盐度的不同,可以划分出至少五种类型不同的气液包裹体;（１）Ｎ２包裹体;（３）高盐度流体包裹体;（３）ＣＯ２包裹体;（４）ＣＯ２－Ｈ２Ｏ包裹体;（５）低盐度流体包裹体。本仅见于含柯石英榴辉岩,而高盐度流体包裹体则几乎存在于所有的榴辉岩和硬玉石英岩中。ＣＯ２包裹体沿榴辉岩中微剪切带分布,或存在于强变形的硬玉石 相似文献
11.
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
12.
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
13.
14.
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
15.
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
16.
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
17.
18.
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
19.
The Importance of the Precipitation and the Susceptibility of the Slopes for the Triggering of Landslides Along the Roads 总被引：3，自引：1，他引：2
Clemente Irigaray Francisco Lamas Rachid El Hamdouni Tomás Fernández José Chacón 《Natural Hazards》2000,21(1):65-81
In order to characterise the influence of the heavyrains on the observed landslides during the 1996–1997hydrological cycle, rainfall records for the last 100years are analysed from 104 stations in easternAndalusia. Regarding the amounts of rain recordedbetween October 1996 and March 1997 in the 104stations studied, 31 presented new all-time records;15 presented values that were 80–100% of thepre-1995 record; 49 stations, 80–50%; and 9stations, < 50%. A map has been devised of thesusceptibility of the materials through which thesouth-eastern Andalusian road network crosses,together with an inventory of the damage caused byinstability phenomena on banks and cuttings of theroad network during the winter of 1996–1997. Therelationships between the rainfall during the studyperiod, the damage caused to the road network and thesusceptibility of the materials affected are analysed.The results indicate that there is a clearcorrespondence between the rainfall recorded and thesusceptibility of the materials with the inventorieddamage. It is concluded that the widespread seriousdamage caused in early 1997 to the roads andsurrounding areas in the Alpujarra region and thecoast of the Province of Granada was mainly caused bythe extraordinarily heavy rains. However, considerablyless damage was observed where the susceptibility ofthe terrain is low, thus highlighting the extremeusefulness of terrain-susceptibility maps for riskprevention and territorial planning. 相似文献
20.
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