Photometric and spectroscopic study of the Shakhbazian compact galaxy groups ShCG 254, ShCG 257, ShCG 351, and ShCG 371

Results of a detailed spectroscopic and photometric study of the four Shakhbazian compact galaxy groups ShCG 254, ShCG 257, ShCG 351, and ShCG 371 are reported. The redishifts of the member galaxies and radial velocity dispersions in these groups have been determined. The R surface brightness distributions of the member galaxies have been studied. The morphological types of the galaxies have been determined based on the profiles of the surface brightness, μ, as functions of the semimajor axis α^1/4 or α. Some members of the groups are in the process of interacting. Curves of isophotal twisting and the Fourier parameter α₄ have been plotted. The physical parameters of the groups (radial velocity dispersions, virial radii and masses, luminosities, mass-to-luminosity ratios, and crossing times) have also been derived. Original Russian Text ? H.M. Tovmassian, H. Tiersch, V.O. Chavushyan, G.H. Tovmassian, S.I. Neizvestnyĭ J.P. Torres-Papaqui, G.M. Rudnitskii. 2006, published in Astronomicheskiĭ Zhurnal, 2006, Vol. 83, No. 11, pp. 963–975.     

论金属矿床的带状分布

1907年J.E斯柏尔(spurr.J.E)首先提出关于金属矿床的带状分布问题,经W.H.艾孟斯(Emmons W.H),系统研究,并提出十六个分带,即自岩体向外,依次为:1.无矿带;2.锡带;3.钨带;4.铋和铝带;5.砷带;6.金带;7.铜带(黄铜矿脉);8.铜带(黝铜矿);9.锌及部分铅和铜带;10.铅带;11.银带;12.无矿带;13.金和银带(碲化物);14.锑带;15.汞带;16.无矿带。以后很多学者讨论了关于金属矿床的带状分布,并对其成因提出了各种不同的假说,然而迄今对金属矿床带状分布的形成机理还不很清楚。     

饱水砂砾石冻结时之孔隙水压力

回 顾 国内外研究表明(S.Taber,1930;G.Beskow,1935;H.A.1955;1957;作者,1965等),在水流可以排除的条件下,饱水砂砾石等粗粒土冻结后的含水量比冻前反而减少。许多学者(A.E.Wissa andR.T.Martin,1968;N.R.Morgens-tern and C.B.Smith,1973;W.D.     

B.B.Broms教授新著《地基基础工程学》问世——“看图学地基基础”

最近,国际著名土力学家、原国际土力学及基础工程学会会长Bengt B. Broms教授在网上发表了一部著作,其书名为《Foundation Engineering》,中文可译作《地基基础工程学》。该书共分阶段4章,章名如下: 1.地基基础工程的各类问题;2.土力学;3.岩土工程现场勘察;4.地基承载力;5.地基基础沉降;6.地基基础设计中应考虑的因素;7.扩展基脚设计;8.弹性地基上的特殊基脚和梁;9.筏形基础;10.侧向土压力;11.挡土结构物;12.桩基础——单桩;13.单桩——动力分析;14.桩基础——群桩。 该书的最大特色是全书内容均用图表示,而且只用图表示,基本不用文字;每…     

IR photometry and a model of a dust shell in V2108 Ophiuchi

We present the results of JHKLM photometry of the oxygen Mira variable V2108 Oph acquired in 2000–2004. The period of brightness variations is refined (570 ± 3 days), and light and color curves in the near-IR are presented. The mean fluxes, color temperatures, and sizes for two blackbodies representing the combined radiation of the star and dust shell at minimum and maximum brightness are estimated. Additional IRAS data were used to compute a model with a spherically symmetric dust shell of silicate grains; the best-fit model has a radius for its inner boundary of 2.4 × 10¹⁴ cm, a dust temperature at this boundary of 1150 K, an optical depth of the shell at 0.55 μm of 16.8, and implies a distance to the star of 980 pc. We estimate the mass-loss rate for V2108 Oph to be 1.2 × 10⁻⁵ M _⊙/yr. Original Russian Text ? M.B. Bogdanov, O.G. Taranova, V.I. Shenavrin, 2006, published in Astronomicheskiĭ Zhurnal, 2006, Vol. 83, No. 5, pp. 437–442.     

劈理现象的观察与讨论

劈理现象的研究从D.沙尔普开始,已有百余年的历史。关于劈理形象的描述、分类与成因方面的一些基本看法,在本世纪初期及更早一些时候就提出来了(Sorby H. C. 1856; Becker G. 1904; LeithC. K. 1905; Becke F. 1913)。以后,仍有不少构造地质工作者继续不断地进行劈理的研究,提出一些补充资料和分类与成因的看法(如Sander B. 1930; Closs E. 1947; Hoeppener R. 1955; de Sitter L.U. 1956; Knill J. K. 1960; Gonzalez-Bonorino F. 1960; Turner F. J. & Weiss L. E. 1963)。     

识别冲击变质作用的岩石学和矿物学标志

自80年代初新突变学说兴起以来,陨击坑及冲击变质作用研究,已成为国际地学界的重大课题之一.本文归纳了国内外的大量资料,对岩矿识别标志进行简介和评述.主要涉及标志有:1.陨石碎块;2.玻陨石和微玻陨石;3.击变者和熔石玻璃;4.击变矿物;5.击变玻璃;6.冲击变形组构;7.冲击变质石英的光学常数变化;8.冲击微页理:9.冲击变质石英的结构变化和变形;10.陨击角砾岩;11.震裂锥;12.瞬变岩.     

会讯

一九八五年将召开全国岩矿测试会议,内容如下: 1.化学分析; 2.电化学分析; 3.单矿物分析; 4.物相分析; 5.气相色谱和离子色谱分析; 6.原子吸收和原子荧光分析; 7.X—荧光光谱分析;     

西藏萨嘎地区布朵淡色花岗岩岩石化学、年代学研究及构造意义

西藏萨嘎地区布朵淡色花岗岩位于喜马拉雅造山带中,属北喜马拉雅造山带的花岗岩。本次研究的萨嘎布朵淡色花岗岩,具高SiO₂（72. 26% ~ 73. 05%）、富Al₂O₃（14. 61% ~ 14. 98%）、高K₂O（3. 65% ~ 4. 09%）和Na₂O（3. 47% ~ 3. 76%）、低P₂O₅（0. 09% ~ 0. 12%）的特征,K₂O／Na₂O = 1. 00 ~ 1. 08、A／CNK = 1. 18 ~ 1. 24,属高钾、过铝质钙碱性S型花岗岩。岩石微量元素变化较大,∑REE = 98. 87 × 10^-6 ~ 124. 51 × 10^-6、LREE／HREE = 11. 24 ~ 16. 12、Rb = 187 × 10^-6 ~ 234 × 10^-6、Sr = 311 × 10^-6 ~ 409 × 10^-6、LaN／YbN = 19. 96 ~ 40. 28、δEu = 0. 89 ~ 0. 99。 布朵淡色花岗岩结晶时间为16. 15 Ma,与区域上的其他的北喜马拉雅淡色花岗岩结晶时间一致,均是形成于陆陆碰撞造山后的伸展背景,代表印度—欧亚大陆后碰撞期的产物,对喜马拉雅造山带的研究有一定的指导意义。     

东昆仑断裂带西大滩段全新世古地震研究*

对东昆仑断裂带西大滩段进行了断错地貌填图和古地震探槽揭露,共揭露出6次古地震事件,它们的年龄分别为10302±651aB.P. , 8650±500aB.P. , 7160±506aB.P. , 2830±170aB.P. , 1985±121aB.P.和1540±92aB.P. ;古地震重复间隔分别为1652±820a,1490±711a,4330±534a,845±209a和445±152a。研究发现,西大滩段全新世古地震活动具有丛集现象和重复间隔时间的分段性,第1丛集期在10300~7100aB.P.期间,平均重复间隔1571±543a,第2丛集期在2800~1500aB.P.期间,重复间隔400~800a左右,平均重复间隔645±129a,两个丛集期间隔4300a。西大滩段全新世地震活动规律对昆仑山地区未来地震危险性评估具有重要意义。     

新疆地区13000年来的气候序列初探

本文根据新疆地区全新世地层的年代标尺,黄土、湖泊和河流沉积物记录的环境变迁信息,以及古土壤和炭化层等所反映的古气候变化做了综合分析,对新疆地区13000年来的气候序列初步概括为:13000—10000aB.P.冷湿转凉干;10000—8000aB.P.,温干;8000—7000aB.P.,温湿;7000—6000aB.P.,暖干;6000—4000aB.P.,温湿;4000—3000aB.P.,温干;3000—2000a.B P.,凉湿;2000aB.P.至今,温干(1500aB.P.左右有凉湿的波动),与现代气候类似。     

东昆仑断裂带库赛湖段晚第四纪古地震研究*

对东昆仑断裂带库赛湖段进行了断错地貌填图和古地震探槽揭露研究。除2001年昆仑山口西8.1级地震外,共揭露出9次古地震事件,它们的年龄分别为31900±1923aB.P. , 27990±1681aB.P. , 23635±1427aB.P. , 20345±1225aB.P. , 16865±1018aB.P. , 12935±774aB.P. , 9730±592aB.P. , 6955±425aB.P.和3100±201aB.P.;古地震重复间隔分别为3910±2554a,4355±2205a,3290±1881a,3480±1593a,3930±1279a,3205±975a,2775±728a,3855±470a和3100±201a。研究结果表明,库赛湖段晚第四纪古地震活动具有准周期性,其平均重复间隔为3544±416a。发生在距今3100年前的倒数第1次古地震事件的离逝时间与重复间隔非常接近,这意味着2001年11月14日发生在库赛湖段的8.1级大地震为该断裂地震活动在准周期上的再现。高的滑动速率和长周期复发间隔表明库赛湖段活动习性以重复发生大地震为特征。     

图版说明

1.Ammodiscus glabratus Cushman et Jarvis×50 (43页)1a.侧视;1b.口视;登记号:XJF 355;库孜贡苏中上古新统齐姆根组.2.A.sp.×50,侧视;登记号:XJF 353;康苏上白垩统库克拜组.3.Reophax excentricus Cushman ×50(43页)侧视;登记号:XJF 103;库孜贡苏渐新统巴什布拉克组.4、5.R.Woodbinensis Tappan ×70 (44页)4.侧视;登记号:XJF 314。5a.侧视;5b.口视:登记号:XJF 315。乌鲁克恰特上白垩统库克拜组.     

美国西部Owens湖地球化学记录及其古气候意义

美国加州中部Owens湖的稳定同位素、稀酸可溶相锂元素浓度及其它地球化学指标揭示本区0.155MaB.P.～62500aB.P.间的气候变化。在0.155～0.140MaB.P.,0.122～0.114MaB.P.,91000～83000aB.P.和72000～62500aB.P.期间,气候冷湿,对应于深海氧同位素(MIS)6,5d,5b和4阶段。这些期间内湖泊开放,^δ18 O和^δ13 C无协变性,Li和有机碳浓度很低。在0.140～0.122MaB.P.,0.114MaB.P.～91000aB.P.和83000～72000aB.P.期间,气候干热,对应于MIS5e,5c和5a阶段。湖泊在这些期间内封闭,^δ18 O和^δ13 C有很好的协变性,封闭湖^δ18 O的变化代表了湖水体积的变化。来自湖中自生镁硅酸盐的锂元素浓度的变化反映了盐度和温度的变化。Owens湖的记录与DevilsHole洞穴流石记录和格陵兰冰芯记录有很好的对比,进一步证实了终结期Ⅱ在海相记录中的年龄滞后。本文讨论了冰期与间冰期之间,美国西部和中国黄土地区气候模式的差异及其互动机制。     

A pre-outburst of the classical symbiotic star BF Cyg in 1987–1989

We analyze previously unpublished spectrophotometric data for the classical symbiotic star BF Cyg obtained in 1982–1989. These data show that BF Cyg already started a new period of activity in 1987–1989, earlier believed to correspond to quiescence. An optical spectrum taken on September 29, 1987 displays several features characteristic of activity in classical symbiotic stars. During the same time interval, excess near-UV radiation was detected, possibly from the accretion disk, and evidence for Rayleigh scattering of the hot component’s radiation on atomic hydrogen was detected in the far-UV, at phases previously believed not to be characteristic of this effect. This latter finding may testify to an enhanced (compared to 1979–1986) rate of mass loss from the cool component of BF Cyg. We discuss the interrelation between an increased mass-loss rate of the cool component and the hot component’s activity in the context of classical symbiotic stars. Original Russian Text ￠ A.A. Tatarnikova, E.A. Kolotilov, A.M. Tatarnikov, 2008, published in Astronomicheskiĭ Zhurnal, 2008, Vol. 85, No. 2, pp. 151–162.     

关于我国南方海相二迭—三迭系的界线问题和接触关系

二迭一三迭系的界线问题和接触关系,近十几年来引起了许多地质及古生物学者的注意,(如Kummel,B.1972;Kummel,B.及C.Teichert,1970;Logan,A.及L.V.Hills,1973;Nakazawa等,1970,1975;Newell,N.D.1973,1978;Stepanov,D.L.等,1969,赵金科等,1978;陈楚震,1978;廖卓庭,1979;范嘉松等,1980.)其原因有二:1.长期认为二迭系和三迭系之间有间断,是一次重要的构造运动;但由于过渡生物群的发现,需要重新探讨传统的地质观点.2.目前界线层型的建立是地层学中的主要课题,地层连续是界线层型的必要条件,所以寻找连续地层剖面成为地层学家们十分关心的问题.     

Simulations of motions of images of extragalactic sources due to weak gravitational microlensing

A statistical study of motions of images of distant extragalactic sources, such as quasars on the celestial sphere, due to the action of weak gravitational microlensing is presented. It was assumed that the parallax of the lens was 10 milliarcseconds (mas), the mass of the lens was 1 M _⊙, and the proper motion was μ = 30 mas. The initial point for the motion of the lens (a star in our Galaxy) was taken to be the boundary of a region with a radius of ϑ = 100 mas and its center coincident with the distant source. The simulations for each trajectory were carried out in steps, with the time step being 0.1 year. The number of sources “launched” over the computational period was 5000. The appearance of the trajectories for the source images is presented; 57% of the total number of sources that participated in the simulations showed motions of 0.7–1.0 mas. Original Russian Text ? T.A. Kalinina, M.S. Pshirkov, 2006, published in Astronomicheskiĭ Zhurnal, 2006, Vol. 83, No. 6, pp. 483–488.     

Carboniferous Mixed Terrigenous Clastic, Carbonate and Sulphate Sediments in the Bachu Area, Xinjiang

The Carboniferous system in the Xiaohaizi area, Bachu County, Xinjiang Uygur Autonomous Region, composed of typical mixed terrigenous clastic, carbonate and sulphate sediments, was mainly deposited in the tidal flat and lagoon environments. The mixed sediments occur as the following eleven types: 1. limestone intercalated with siltstone; 2. interbeds of shale and limestone; 3. gypsolyte interbedded with limestone; 4. gypsolyte intercalated with siltstone; 5. gypsolyte interbedded with shale; 6. gypsolyte intercalated with siltstone, limestone and dolomite; 7. siltstone interbedded with gypsolyte and limestone; 8. terrigenous detritus scattered in carbonate matrix; 9. carbonate as cement in clastic rocks; 10. mixed sediments of carbonate and terrigenous mud; 11. mixed sediments of carbonate grains with terrigenous sand. Based on the analysis of the dynamic mechanism of mixed sediments, it is believed that these types of mixed sediments in the study area were controlled by climate, sea level change and so     

东秦岭钼矿Re-Os同位素年龄及其成矿动力学背景

东秦岭钼矿带位于华北克拉通南缘 ,集中分布于陕西省的金堆城地区、河南省栾川县南泥湖 -三道庄 -上房沟、嵩县雷门沟地区。钼矿床类型主要为斑岩型、斑岩 -矽卡岩型 ,少量热液碳酸盐岩脉型。采用电感耦合等离子体质谱仪法对南泥湖钼矿田、雷门沟钼矿床等 4个矿床 8件辉钼矿进行了 Re-Os同位素年龄测定 ,获得南泥湖矿床的辉钼矿 Re- Os模式年龄为 14 1.8± 2 .1Ma;三道庄矿床的辉钼矿 Re- Os模式年龄为 14 4 .5± 2 .2～ 14 5 .0± 2 .2 Ma,平均为 14 5 .0± 2 .2 Ma;上房沟矿床的辉钼矿 Re- Os模式年龄为 14 3.8± 2 .1～ 14 5 .8± 2 .1Ma,平均为 14 4 .8± 2 .1Ma;6件样品的等时线年龄为 14 1.5±7.8Ma(2σ) ;雷门沟钼矿床的 2件辉钼矿样品的 Re- Os模式年龄为 131.6± 2 .0～ 133.1± 1.9Ma,平均为 132 .4± 2 .0 Ma。结合前人资料 ,认为东秦岭钼矿的形成时代局限于 2 2 1.5± 0 .3～ 132 .4± 2 .0 Ma之间 ,主要出现在 2 2 1.5± 0 .3Ma左右和 14 4 .8± 2 .1～ 132 .4± 2 .0 Ma时限之间 ,其对应的地球动力学背景分别为华北克拉通与扬子克拉通的碰撞造山后陆内造山和伸展过程、中国东部构造体制大转换时期     

第21届国际地质学会后年在哥本哈根召开

第21码国际地叽学会将龄1洲J年8月州呼麦首都哥本哈根米行。大会将分$Il时渝一F列阴题: 1.地球化学旋沮; 2.应川地球化学和地球物理的地贾桔粱; 3.第四记前的艳对年龄划定; 4.第四记芬唇及古气候; 6.白奎一第三祝孙界; 6.第四记前徽休古生物; 7.奥陶耗地解411对士匕 8.前寒大纪晚期和寒示饼己地居; 9.前寒无祝地居对士匕 10.海洋地熨; 11.石f山地置中的区域和洛造洲跳; 12.区域古地理; 13.转石区,火成岩及变贾羚; 14.花询料一片麻岩阅题; 16.灿金1矿床成因口乃题; 16.矿床成因; 17.悼品岩矿物和成因; 18.地壳榷造及岩石变形; 19.加里东造…