第九届全国有机地球化学学术会议总结

受第九届全国有机地球化学学术会议主席团的委托，对这次会议作简要总结。认为自第八届学术会议以来，我国有机地球化学研究在大油气田地球化学、特别是成藏地球化学研究、混源油定量研究、模拟实验等方面，取得了新的进展，指出在第十届全国有机地球化学学术会议召开之前的两年时间内应切实解决的几个难点问题。     

煤中微量元素的环境地球化学

煤中微量元素的环境地球化学冯新斌洪业汤（中国科学院地球化学研究所，贵阳５５０００２）关键词煤微量元素环境地球化学对煤中微量元素的研究不仅能提供成煤环境的信息，而且具有重要的环境意义，因为燃煤过程已成为生态环境中潜在毒害元素（如Ａｓ、Ｂｅ、Ｃｄ、Ｃｏ、...     

四川冕宁稀土矿床脉石脉物的微量及稀土元素地球化学特征

包裹体地球化学研究表明，四川冕宁稀土矿床中存在着岩浆成因的萤石、重晶石和方解石，它们的微量元素地球化学特征与热液成因对应矿物有明显差别：岩浆成因重晶石相对富集亲石元素，贫亲硫元素；无论是岩浆成因重晶石，还是萤石均明显富集挥发分。稀土元素地球化学研究显示，不同成因萤石、重晶石在稀土元素总量、ＬＲＥＥ／ＨＲＥＥ、（Ｌａ／Ｙｂ）Ｎ、δＥｕ及δＣｅ等一系列稀土元素地球化学参数上都存在明显的差异。该项研究还     

地球化学省的概念,特征及其与成矿省的关系

地球化学省是一种范围较大的原生异常，面积可达几千至几万ｋｍ＾２。地球化学省可以看作是地壳的一个块段，在该块段内元素的含量和地壳元素的平均值有显著不同，它反映了地壳原始分异及演化过程中所造成的化学组分的巨大差异。本文根据国内外大量实例，概述了地球化学省的概念、特征，及其与在矿省的关系、圈定方法和研究意义。     

地球化学省的概念、特征及其与成矿省的关系

地球化学省是一种范围较大的原生异常，面积可达几乎至几万ｋｍ￣２。地球化学省可以看作是地壳的一个块段，在该块段内元素的含量和地壳元大的平均值有显著不同，它反映了地壳原始分异及演化过程中所造成的化学组分的巨大差异。本文根据国内外大量实例，概述了地球化学省的概念、特征，及其与成矿省的关系、圈定方法和研究意义。     

第九届全国有机地球化学学术会议总结

受第九届全国有机地球化学学术会议主席团的委托,对这次会议作简要总结.认为自第八届学术会议以来,我国有机地球化学研究在大油气田地球化学、特别是成藏地球化学研究、混源油定量研究、模拟实验等方面,取得了新的进展,指出在第十届全国有机地球化学学术会议召开之前的两年时间内应切实解决的几个难点问题.     

地洼构造地球化学研究进展及发展趋向

近年来,地洼理论在构造地球化学研究方面取得了较大的进展:编制出了中国大地构造地球化学分区简图和中国东部锡元素的构造地球化学分区略图;从多个角度探讨了地洼区的化学地球动力学问题;深化了断裂构造地球化学研究;推进了断裂构造地球化学测量与找矿的应用工作;查明了石碌矿田的一些褶皱构造地球化学问题:划分出面型、线型、点型三种成矿构造地球化学类型;阐明了一些基性岩类和花岗岩受的构造地球化学特征;进行了实验构造地球化学的研究;论述了超大型锡矿床具有配置齐全、发育完整、有机联系的一套成矿构造组合,以及矿床物质组分极其庞杂的特性。     

GC－IRMS技术在地球化学中的应用现状与前景

ＧＣ－ＩＲＭＳ技术在地球化学中的应用现状与前景熊永强，耿安松（中国科学院广州地球化学研究所．广州５１０６４０）关键词色谱－同位素质谱，地球化学，单体稳定碳同位素有机质的碳同位素组成特征含有丰富的母质来源和沉积环境等信息，一直是有机地球化学的重要研究领...     

论有机质与金属成矿和勘查

有机质与金属成矿是一个处于初级研究阶段的地球化学领域。本文对其研究历史进行了回顾，指出了有机质在金属成矿中的主要作用以及有机烃气测量在金属矿产勘查中的初步应用成果。认为该领域的深入研究，可促进成矿作用、成矿过程、成矿规律、气体运移规律和成矿预测的全面认识，对有机地球化学和无机地球化学、固体地球化学与气体地球化学、勘查地球化学与矿床学等不同学科之间的连接和相互渗透将起重要的纽带作用。     

锗、银、金大型超大型矿床的有机地球化学研究

锗、银、金大型超大型矿床的有机地球化学研究庄汉平（中国科学院地球化学研究所，贵阳５５０００２）关键词有机质—金属相互作用褐煤型超大型锗矿床黑色页岩型银钒矿床卡林型金矿床有机地球化学有机质—金属相互作用是有关超大型矿床基础理论研究的重要内容之一。在以往...     

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).     

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.)