正向运动韧性剪切带形成机理及成矿条件初探

正向运动韧性剪切带形成机理及成矿条件初探何直凯（中国科学院地球化学研究所，贵阳５５０００２）关键词正向运动韧性剪切带，形成机理，构造模式，成矿条件自８０年代以来，发现某些金矿与韧性剪切带在时、空、成因等的密切联系，近年来对其研究有了突破性进展。到目前...     

当代地球化学研究的某些新进展（Ⅰ）

当代地球化学研究的某些新进展（Ⅰ）魏春生（中国科学院地球化学研究所，贵阳５５０００２）关键词矿床地球化学，流体地球化学１矿床地球化学有关成矿理论研究的新突破（１）变质热液金矿床成矿理论的确立与完善：７０年代后，世界范围内又掀起了新的“淘金热”，到８０...     

新疆北部与邻区超大型矿床成矿背景条件对比研究及前景评估

“新疆北部与邻区超大型矿床成矿背景条件对比研究及前景评估”是“八五”国家重点科技攻关项目８５９０２（新疆“三○五”项目）的专题研究成果,主要由中国科学院广州地球化学研究所、中国科学院地球化学研究和陕西省地矿局区域地质调查队完成。该成果应用了近代地球...     

冀西北东坪金矿床的成矿期次及成矿阶段研究

冀西北东坪金矿床的成矿期次及成矿阶段研究莫测辉（华南农业大学资源环境学院，广州５１０６４２）王秀璋程景平梁华英（中国科学院广州地球化学研究所，广州５１０６４０）关键词金矿床石英脉型蚀变岩型成矿期次成矿阶段“石英脉型”与“蚀变岩型”是中温（中深）热液脉...     

冀西北东坪金矿床成矿流体的来源研究

冀西北东坪金矿床成矿流体的来源研究＊莫测辉王秀璋程景平梁华英（华南农业大学资源环境学院，广州５１０６４２）（中国科学院广州地球化学研究所，广州５１０６４０）关键词金矿床成矿流体来源岩浆热液大气降水热液侵入岩体中的金矿床乃至岩体接触带或附近地层中的金矿...     

黔东南锦屏金矿成矿模式的模拟实验

利用中国科学院地球化学研究所矿床地球化学国家重点实验室的实验设备对黔东南锦屏金矿进行了成矿模式的模拟实验。通过剪切实验,变形、破裂实验,成矿物质活化、迁移实验,成矿模式模拟实验和多次应力实验,获得了成矿物质以碎粒流和塑性流动的方式顺层及穿层充填并在褶曲核部富集的结果,多次应力实验使成矿物质叠加富集。实验结果初步证实了锦屏石英脉金矿的成矿模式,为该区构造控制金矿提供了重要的实验资料,也为今后研究该区金矿的成矿规律和找矿提供了有益的信息。     

《中国改造型金矿床地球化学》简介

《中国改造型金矿床地球化学》简介《中国改造型金矿床地球化学》由中国科学院广州地质新技术研究所（原中国科学院地球化学研究所广州分部）王秀璋、程景平、白正华、梁华英及中国科学院贵阳地球化学研究所张宝贵、樊文苓共同撰写，科学出版社１９９２年６月出版发行。该...     

金山金矿构造控矿特征及其模拟实验

在前人工作的基础上,研究金山金矿构造控制产出部位,控制金山金矿蚀变糜棱岩金矿和石英脉金矿体及矿石类型,控制金山金矿微量元素、稀土元素、同位素及流体包裹体等地球化学特征;运用中国科学院地球化学研究所矿床地球化学国家重点实验室中的构造地球化学(构造成矿)高温高压实验条件进行构造控矿模拟实验,模拟高温高压条件下,岩石、矿石的变形实验,构造控制成矿物质活化、迁移聚集以及构造控制金山金矿载金矿物成矿元素变化的模拟实验和多期多次构造应力作用下成矿物质活化、迁移模拟实验。实验结果表明:构造活动的热动力作用下,不仅使岩石、矿石产生韧性剪切变形和脆性变形,并可看出韧性变形在前,脆性变形在后,并叠加在韧性变形之上,构造作用能使成矿物质活化、迁移并聚集在襁皱虚脱部位,层间破碎带及裂隙交汇部位;多期多次构造应力实验不仅使变形、破裂加剧,并使成矿物质叠加富集。实验结果与金山金矿成矿十分近似,这不仅为研究金山金矿成矿和分布规律提供实验资料和依据,也为矿区进一步找矿提供有益信息。     

滇东北麒麟厂锌铅矿床成矿金属来源、成矿流体特征和成矿机理研究

滇东北麒麟厂锌铅矿床成矿金属来源、成矿流体特征和成矿机理研究＠周朝宪￥中国科学院地球化学研究所铅锌矿,物质来源,成矿流体,成矿机理滇东北麒麟厂锌铅矿床成矿金属来源、成矿流体特征和成矿机理研究周朝宪（中国科学院地球化学研究所,贵阳５５０００２）收稿日期：１９...     

哀牢山金矿带金成矿制约机制探讨

哀牢山金矿带金成矿制约机制探讨＠毕献武￥中国科学院地球化学研究所哀牢山金矿,金成矿,制约机制哀牢山金矿带金成矿制约机制探讨毕献武（中国科学院地球化学研究所,贵阳５５０００２）关键词哀牢山金矿金成矿制约机制哀牢山金矿带是我国西南“三江”构造成矿带的重要组成...     

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