中国的异珊瑚

从６０年代开始，我国学者陆续发表了异珊瑚的研究成果，建立１３个属，描述１６０余种，所发现属种数量已大大超过国外学者所描述范围，并且在异珊瑚分类，骨骼微细构造及隔壁演变规律研究等方面都取得长足的进展，特别是发现具３个隔壁的异珊瑚，对异珊瑚的隔壁发育方式及各属间隔壁变异关系有了清楚地揭示，在分类方面可将异珊瑚分为具内沟和不具内沟的两个系列，异珊瑚在我国产出时代为泥盆纪早期至石炭纪晚期，我国的异珊瑚绝大     

异珊瑚隔壁的变异及其分类

自发现具有３个隔壁的异珊瑚新类型之后，对异珊瑚各属之间的隔壁变异关系有了清楚的揭示。按照后生隔壁发育的方式，可分为具内沟的异珊瑚，即由３个隔壁的Ｔｒｉｐｈｙｌｌｉａ，５个隔壁的Ｐｅｎｔａｐｈｙｌｌｉａ，直至多隔壁的Ｆｏｓｓａｐｈｙｌｌｉａ系列和不具内沟的异珊瑚系列，即由４个隔壁的Ｑｕａｄｒａｔｉｐｈｙｌｌｉａ，６个隔壁的Ｈｅｘａｐｈｙｌｌｉｕ，直至多隔壁的Ｈｅｔｅｒｏｐｈｙｌｌｉａ。此外，还可出现具有轴管结构的Ｃｒｅｐｉｄｏｐｈｙｌｌｉｄａｅ及具有特殊外壁结构的Ｌｏｎｇｌｉｎｏｐｈｙｌｌｉｉｄａｅ。对已发现的异珊瑚１９个属作了系统的分类，并将异珊瑚置于珊瑚纲内的一个亚纲，同皱纹珊瑚亚纲相并列的分类单位。     

异珊瑚隔壁的变异及其分类

自发现具有３个隔壁的异珊瑚新类型之后，对异珊瑚各属之间的隔壁变异关系有了清楚的揭示。按照后生隔壁发育的方式，可分为具内沟的异珊瑚，即由３个隔壁的Ｔｒｉｐｈｙｌｌｉａ，５个隔壁的Ｐｅｎｔａｐｈｙｌｌｉａ，直至多隔壁的Ｆｏｓｓａｐｈｙｌｌｉａ系列和不具内沟的异珊瑚系列，即由４个隔壁的Ｑｕａｄｒａｔｉｐｈｙｌｌｉａ，６个隔壁的Ｈｅｘａｐｈｙｌｌｉａ，直至多隔壁的Ｈ。此外，还可出现具有轴管结构的Ｃｒｅｐｉ     

异珊瑚隔壁的排布系列

异珊瑚原始隔壁数目、后生隔壁的增生部位和方式以及隔壁的排布系列的研究，是探讨异珊瑚的起源、演化和分类的基本前提。通过对3隔壁的Triphyllia和4隔壁的Quadratphyllia二属的研究，结合生物体对称的原则，提出异珊瑚原始隔壁为2条，并认为异珊瑚的后生隔壁发育在原始隔壁所分隔的左右两侧部体腔内缘部位，长隔壁呈树枝状拓布或者末端达中心向某一方面扭曲连接形成轴管构造。依据后生隔壁在体腔内的繁生能力、增殖数量、发生部位、排布方式、分化程度、隔壁始端在外壁中的埋植类型和末端在中心部位的连接类型等方面的不同，异珊瑚隔壁增生大致可划分为7个布系列。     

晚石炭世及早二叠世部分常见复体四射珊瑚骨骼微细构造及其分类意义

本文通过对晚石炭世及早二叠世几种常见复体四射珊瑚的骨骼,尤其是隔壁的电镜研究、划分出了4种重要的隔壁微细构造类型,并指出了这些微细构造类型的地层分布规律及其在分类中的意义。     

贵州独山星朗地区早石炭世异珊瑚

描述贵州独山星朗早石炭大塘期异珊瑚新属１个，新种１８个。本区异珊瑚类不仅有对环境专属性较强的一些异珊瑚新属种，还有对环境专属性较小的一些广布性属种。它们与贵州威宁，广西隆林的异珊瑚化石相比，普遍外壁厚，隔壁显著加厚及横板密集，说明这些异珊瑚是在水动力条件较强的开阔台地生活。     

贵州独山星朗地区早石炭世异珊瑚

描述贵州独山星朗早石发世大塘期异珊瑚新属１个，新种１８个。本区异珊瑚类不仅有对环境专属性较强的一些异珊瑚新属种。还方对环境专属性较小的一些广布性属种。它们与贵州威宁、广西隆林的异珊瑚化二相比．普遍外壁厚，隔壁显著加厚及横板密集，说明这些异珊瑚是在水动力条件较强的开阔台地生活。     

异珊瑚目的地史分布与化石组合

异珊瑚化石始发现于早泥盆世 ,早石炭世为鼎盛时期 ,至早二叠世末全部绝灭。本研究将异珊瑚划分为 4个化石组合 ,并对异珊瑚的起源、分布及迁移规律及生态环境等进行了讨论。化石组合由老至新分别为 :早泥盆世 Tetraphyllia组合 ;晚泥盆世 Oligophylloides-H eterophyllia组合 ;早石炭世 Pentaphyllia-H exaphyllia-Radiciphyllia 组合 ;早二叠世 Dichophyllia-H eterophyllia-H exaphylloides组合。并指出异珊瑚属于热带—亚热带至暖温带的生物类群 ,起源中心可能为中国华南板块     

四川江油马角坝早石炭世异珊瑚

近年来,异珊瑚类在我国广大地区的早石炭世地层中陆续地被发现并日益为人们所重视。如贾慧贞、许寿永（1977）、俞违章等（1973）、范影年（1978）、王增吉（1980）等都有报道。他们对异珊瑚的研究,在地层划分和对比中都起着一定的作用。当前的材料,系笔者1980年采于四川江油马角坝附近总长沟群上部的紫红色泥质灰岩中。     

安徽、湖南早石炭世早期床板珊瑚组合及其地层意义

我国早石炭世早期床板珊瑚丰富,分布广泛,层位稳定,是划分早石炭世早期地层的主要化石之一。安徽、湖南是早石炭世早期床板珊瑚的主要产地之一,早在本世纪三十年代,就有一些古生物学者对此作过报道,但标本不多,资料比较零星。解放以来,特别是从六十年代以后,床板珊瑚的研究取得了较大进展,成绩显著,其中对皖、湘二省的研究有林宝玉、贾慧贞等,他们分别描述了湖南早石炭世床板珊瑚的一些新的属种。林宝玉(1962)还对早石炭世床板珊瑚做了如下分带(组合):即孟公坳段为Cleistopora hunanen-sis-Gorskyites multispinus组合:石橙子段为Syringopora hyperbolo-tabulata～Syri-ngopora lipoensis组合,这一组合带的建立,为我国早石炭世地层对比,提供了新的依据。近年来,笔者在安徽、湖南早石炭世早期(岩关期)地层中收集了一些珊瑚资料,并     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861