吉林海沟金矿床成矿流体的地球化学特征

海沟金矿床石英中含丰富的三相ＣＯ２－ＮａＣｌ－Ｈ２Ｏ和两相富ＣＯ２包裹体，并与两相的ＮａＣｌ－Ｈ２Ｏ包裹体共生。成矿流体富含ＣＯ２，并有２种类型和来源：高盐度富ＣＯ２的ＮａＣｌ－Ｈ２Ｏ溶液，来源于浆热液；低盐度ＮａＣｌ－Ｈ２Ｏ溶液，来自古大气降水。成矿最佳温度为２２０－３００℃，流体静压力为４－２０ＭＰａ，矿化深度为１－３ｋｍ，流体盐度为２－７ω（ＮａＣｌ）／１０＾－２，总密度为０．６４４ｇ／ｃｍ     

花岗岩－KBF＿4－Na＿2MoO＿4体系的实验结果

花岗岩－ＫＢＦ＿４－Ｎａ＿２ＭｏＯ＿４体系的实验结果朱永峰（北京大学地质学系，１００８７１）常压下花岗岩－ＫＢＦ＿４－Ｎａ＿２ＭｏＯ＿４体系在１２５０℃条件下呈均匀熔体状态，成矿元素Ｍｏ及其它元素（如Ｆ，Ｃｌ，Ｈ＿２Ｏ及变网离子Ｃａ，Ｎａ，Ｋ，Ｍｇ等...     

粤西河台金矿床的流体包裹体及成矿流体

河台金矿床存在三种类型流体包裹体：低盐度（约１．５￣６ｗｔ％ＮａＣｌ）Ｈ２Ｏ－ＣＯ２包裹体、中等盐度（约６￣１４ｗｔ％ＮａＣｌ）水溶液包裹体、富ＣＯ２包裹体。它们的均一化温度范围在１３０℃至３１０℃之间，捕获时的围压大约为５０￣１７０ＭＰａ。初始的成矿流体是一个低盐度的以Ｈ２Ｏ－ＮａＣｌ－ＣＯ２为主的化学体系，主要源于大气水与变质建造水的混合。在演化过程中，成矿热液流体发生了ＣＯ２发泡和气液两相不     

大别山榴辉岩的包裹体研究

本文对大别山榴辉岩流体包裹体进行了研究。包裹体成分以ＮａＣｌ－Ｈ２Ｏ、Ｈ２Ｏ、ＮａＣｌ－ＣＯ２－Ｈ２Ｏ为主，是在退变质的角闪岩相和绿片岩相条件下捕获的。从变质高峰期至退变质晚期，包裹体成分演化由氧化向还原转化。熔融包裹体的发现，说明榴辉岩在形成过程中伴随局部深熔作用。通过流体包裹体研究，对大别山榴辉岩抬升过程ｐ－Ｔ－ｔ轨迹进行了探讨，认为是一等温降压过程。     

单扫描极谱法测定饮料和食盐中的碘

本文提出以ＫＭｎＯ４－ＮａＣｌＯ作氧化剂,将碘化物氧化成碘酸盐,然后Ｎａ２ＳＯ３还原过量氧化剂,在硼砂缓冲介质中,于－１．２６Ｖ测定ＩＯ＾－３产生的吸附波。此体系灵敏,稳定,重现性好,线性宽,有很好的实用性。本法用于饮料和食盐中痕量碘的测定,结果满意。     

岩浆—流体过渡和阿尔泰三号伟晶岩脉之成因

本文对新疆阿尔泰可可托海的三号伟晶岩形成的物理化学条件、特别是流体－熔融包裹体进行研究，证明岩浆的确可以分出热液，对于三号伟晶岩脉来说，这种热液组分主要是ＮａＣｌ－ＣＯ２－Ｈ２Ｏ流体。     

桐柏-大别地区中温热液金矿床成矿流体性质与沉淀机理

通过对桐柏－大别地区１０个中温热液金矿床（点）的流体包裹体研究，确定成矿流体属于低盐度（６ｗｔ％ＮａＣｌ），富ＣＯ２（１０ｍｏｌ％）的ＮａＣｌ－ＣＯ２－Ｈ２Ｏ体系。这种以演化的大气降水为主的流体在４～１０ｋｍ深度范围内，由于压力由静岩压力状态的向静水压力状态的空而发生的复杂三阶段不混溶过程中沉淀，在该过程的中晚期出现金矿化。压力状态的突变是柏桐－大别造山带在中生代碰撞造山晚期，由挤压体制向伸展体制     

吉林小西南岔金铜矿床流体包裹体及成矿作用研究

该矿床流体包裹体丰富，为２相气液、１相液体、少数含子晶多相和含液态ＣＯ＿２三相包裹体。包裹体液相中富Ｎａ￣＋、Ｃｌ￣－和ＳＯ，气相中Ｈ＿２Ｏ占优势，ＣＯ＿２次之。属ＮａＣｌ－Ｈ＿２Ｏ体系。包裹体同位素分析表明，成矿流体为岩浆水和大气降水的混合流体。在温度高于３６０～４００℃的中性—弱酸性热流体中，Ａｕ和Ｃｕ的络合物呈迁移状态，在温度低的弱酸—酸性的较还原环境下，围岩产生广泛的石英－绢云母化，导致Ａｕ、Ｃｕ络合物分解，沉淀出大量Ａｕ和Ｃｕ。     

热水溶液地球化学

概述了热水溶液地球化学的主要研究内容和近年来在实验和理论研究方面的进展，包括高温高压下水的热力学性质、状态方程式、介电常数、电导率和电离平衡；ＮａＣｌ－ＣＯ２－Ｈ２Ｏ体系及其边界体系（ＮａＣｌ－Ｈ２Ｏ和ＣＯ２－Ｈ２Ｏ）的相关系、热力学性质和状态方程式，特别是利用人工流体包裹体技术和分子动力学模拟取得的新成果；高温高压电解质稀水溶液的电导测定；以ＨＫＦ模型为基础，热水溶液中不同物种的标准偏摩尔热力学性质和高温高压有关物理化学参数的估算；热水溶液中的物种形成（热液流体中的矿物溶解度测定、电势测量和谱学研究）；水和热水溶液结构的红外和拉曼谱学研究；水和热水溶液的传输性质（粘度和导热系数）。     

内蒙古乌拉山金矿成矿流体来源,性质和演化

乌拉山金矿成矿流体为中－中高 温，中高压力，盐度中等偏低，低密度，弱酸性－弱碱性和还原环境的ＣＯ２－ＮａＣｌ－Ｈ２Ｏ体系。韧－脆性剪切变质变形作用和岩浆活动控制着流体发育过程，成矿作用的演化从早期→晚期，从西段→东段具有规律性变化，大气降水在其演化过程中起了重要作用。     

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