山东省石炭—二叠—三叠纪岩石地层清理意见

重新厘定的山东省石炭－二叠－三叠纪岩石地层分为二个群、七个组、五个正式段。下部的含煤岩系为月门沟群，时代为晚石炭世－早二叠世，包括本溪组、太原组和山西组，本溪组底部的铁铝岩系为湖田段；中部一套杂色地层，以黄绿、灰绿、紫色砂、页岩为主，基本不含煤层，为石盒子组，时代为早二叠世－晚二叠世，分为黑山段、万山段、奎山段和孝妇河段；上部一套基本不含植物化石的红色地层，主要以砂岩为主，夹泥岩，为石千峰群，分为孙家沟组和刘家沟组，时代为三叠纪。     

藏北申扎地区上二叠统木纠错组的建立及皱纹珊瑚组合

在申扎县城东南木纠错南东岸附近发现一套巨厚的以白云岩、白云质灰岩为主组成的岩系,厚达2348m。该岩系整合覆于下二叠统下拉组之上,并于其底部发现中国南方晚二叠世早期珊瑚动物群中的重要分子WaagenophyllumindicumcrassiseptatumWu和LiangshanophyllumstreptoseptatumWang两种,与其共生的还有Lobatophyllumzakan-genseWu和WaagenophyllummegacolumetumWu,它们共同组成一个晚二叠世早期特有的皱纹珊瑚动物组合,命名为Waagenophyllum-Liangshanophyllum-Lobatophyllum组合。将含有这一珊瑚化石组合的以白云岩、白云质灰岩为主的岩系另建立新组———木纠错组,该组在层位上相当于中国南方上二叠统的吴家坪组。     

川东大巴山南缘晚二叠世地层划分

根据实测剖面和收集的地质资料,按区内晚二叠世的岩性组合、古生物化石组合特征,对晚二叠世地层提出一个划分方案     

长江源各拉丹冬一带发现Gallowayinella■类动物群

在1∶25万赤布张错幅区域地质调查中,于原划下二叠统开心岭石灰岩组中发现晚二叠世长头期Gallowayinella类动物群化石,表明该区二叠纪地层非属早二叠世,而似应与青海省南部晚二叠世鸟丽群对比。     

长江源各拉丹冬一带发现Gallowayinella (虫廷)类动物群

在1:25万赤布张错幅区域地质调查中,于原划下二叠统开心岭石灰岩组中发现晚二叠世长头期Gallowayinella 类动物群化石,表明该区二叠纪地层非属早二叠世,而似应与青海省南部晚二叠世鸟丽群对比.     

长江源各拉丹冬一带发现Gallowayinella Ting类动物群

在1：25万赤布张错幅区域地质调查中，于原划下二叠统开心岭石灰岩组中发现晚二叠世长头期Gallowayinella Ting类动物群化石，表明该区二叠纪地层非属早二叠世，而似应与青海省南部晚二叠世鸟丽群对比。     

江苏、安徽南部晚二叠世早期的海侵

江苏、安徽南部地区(图)晚二叠世早期地层,过去统称为龙潭组。其层位及对比,前人曾经有过系统总结。近年来,笔者通过对江苏、安徽南部地区晚二叠世早期地层剖面观察和两省地质局区域地质调查队的有关资料分析和对比,认为本区晚二叠世早期沉积可划分为东、西两个沉积区,其间有一呈     

江西安福一些晚二叠世早期菊石

本文报道的晚二叠世早期菊石,计有6种、3属,其中包含有4新种、1新属。文中对江西乐平煤系的新近认识,作了简要介绍,并认为晚二叠世早期的沉积地层,唯以江西乐平煤系的沉积发育最全,地层厚度最大,以及其中菊石的谱系演化序列最完整,它不仅为华南绝无仅有,就是在世界其它地区也不曾见及。重新启用江西乐平煤系为晚二叠世早期地层的代表剖面,有助于华南和华南与国际地层对比的研究。     

小兴安岭东南部晚二叠世地层新认识

黄本宏将小兴安岭东南部晚二叠世地层划分为早期的三角山组和晚期的红山组。笔者认为它们属异地同时沉积,时代为晚二叠世。三角山组命名较晚,建议取消,保留红山组名,代表本区晚二叠世陆相碎屑沉积,而原三角山组上段的火山碎屑沉积仍归五道岭组。此外,在红山组中首次发现了数层煤线,这为在本区寻找晚二叠世可采煤层提供了线索。      

贵州紫云晒瓦晚二叠世深水相地层

通过对晒瓦晚二叠世岩石地层和生物地层的初步研究 ,认为晒瓦晚二叠世地层属于深水相沉积 ,可划分成4段 ;并根据双壳类、腕足类延限和发育特征 ,分别建立了一个双壳类化石带 (Claraia primitiva- H unanopecten exi-lis组合带 )和二个腕足类化石带 (N eochonetes substrophomenoides- Orthothetina ruber组合带 ,Acosarina dorsisulca-ta- Crurithyris speciosa组合带 ) ;在对牙形石、双壳类和腕足类等典型化石的综合研究基础上 ,首次划分出吴家坪阶和长兴阶 ,改变了以往本区晚二叠世年代地层未细分的状况 ,提高了划分对比精度。     

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.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

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).     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

STRUCTURAL GEOLOGY

正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with