张家口万全寺银矿的成矿作用与深部找矿

万全寺银矿是张宣幔枝构造东缘盖层中的一个中型银矿床,现主要开采Ⅴ号、Ⅱ号矿脉。本文以幔枝构造理论为指导,通过对矿床地质背景、矿田构造特征、成矿物质来源、矿脉规模垂向变化、矿床成因等方面的研究,笔者认为万全寺银矿深部仍有很大的找矿潜力。另外,往深部金品位明显增高,具有从浅部银矿往深部逐渐变为银金矿、甚至金银矿的趋势。深部地质找矿应该引起高度重视。     

河南银洞岭银矿床原生地球化学异常特征及找矿模型

银洞岭银矿床是近年来在我国重要的桐柏围山城金银多金属成矿带上,新发现的一处大型矿床,与著名的破山大型银矿和银洞坡大型金矿毗邻.文章通过对银洞岭银矿床地质、地球化学异常及其元素轴向分带规律的综合研究,建立了该矿床的地质-地球化学找矿标志及其找矿模型,以期为矿床外围及深部找矿评价提供地球化学依据.     

内蒙古察右前旗李清地矿区铅锌银矿床探采新进展及成矿规律北大核心CSCD

近年来,内蒙古察右前旗李清地铅锌银矿床在采矿和深部探矿中取得了一系列新进展,矿床的资源储量规模进一步扩大,对矿体的空间分布特征及矿床成因的研究有了新的认识。本文在以往勘查和研究的基础上,对近几年在该矿床探采过程中的新发现进行系统研究,以矿田构造理论为指导探讨了矿床成因和找矿潜力。研究认为,该矿床矿体受复式背斜构造及其配套的北东和北西向断裂构造控制,矿床形成与深部隐伏岩体侵入关系密切,矿床成因为斑岩-热液型矿床,推断成矿时代为晚侏罗世-早白垩世。认为目前发现和开采的李清地铅锌银矿床为铅锌银钼斑岩-热液成矿系统的上部,外围和深部找矿潜力很大,尤其是深部勘查前景良好。     

皇城山银矿床地球化学特征及预测评价

皇城山银矿床是近年勘查评价出的一处中型低温银矿床.矿床赋存于中生代早白垩世火山岩、次火山岩内,矿体产于北东向花岗斑岩脉中,且严格受火山构造控制.矿区普查阶段比较系统地开展了万分之一岩石测量和原生晕找盲矿专题研究.通过对皇城山银矿地球化学特征研究,建立找矿评价标志,进而对矿带未知地段进行分析对比,做出深部远景评价,取得较好的地质找矿效果.     

青海东昆仑那更康切尔银矿地质特征及找矿远景浅析

青海省那更康切尔银矿是近年来在青海东昆仑成矿带首次发现的独立中低温构造热液型银矿床,运用地、物、化综合手段评价,发现了3条银矿化带、7条银矿体。通过对那更康切尔银矿地质特征、控矿因素及找矿标志进行综合分析和研究,认为该矿床具大型银矿的成矿潜力,以指导区内该类矿床找矿方向。     

中国银矿床成矿系列与成矿谱系初探

中国银矿资源丰富,矿床类型多样,找矿潜力巨大。文章运用成矿系列的理论和方法,对中国银矿床进行了成矿系列和成矿谱系的初步研究,并将其初步划分为38个银矿床成矿系列(组),59个亚系列。结合区域地质构造演化与各成矿系列的演化关系归结出中国银矿床成矿谱系。研究表明,中国银矿床成矿系列结构及演化具有时空不均衡性、银矿床类型演化渐趋多样化、矿石建造类型演化渐趋复杂化等特点,文章指出了成矿系列和成矿谱系研究对全国银矿理论研究和找矿实践的指导意义,并结合银矿床成矿系列和成矿谱系特点分析了银矿床今后找矿的具体方向。     

黔西北猫猫厂-榨子厂铅锌矿区地质特征及找矿方向

猫猫厂铅锌矿系黔西北铅锌银矿集区主要矿床之一，产于NW向与NE向构造交切复合部位，赋矿地层主要为石炭系白云岩、白云质灰岩。通过对矿床地质特征的总结及与邻区典型矿床类比分析，认为深部找矿潜力大，应加大找矿力度。     

兰坪八宝山铜银矿床地质特征

白秧坪—富隆厂多金属成矿区北部是一个成矿十分有利地区。八宝山铜银矿床的发现对扩大成矿区找矿远景具有重要意义，文章在分析矿床地质特征的基础上，初步总结了矿床的成因类型，探讨了矿区的找矿远景。     

湖南盈洞铜-银矿床地质特征及找矿方法探讨

盈洞铜-银矿是上世纪80年代中期发现并开发的一个小而富的矿床,现仍具备较大的矿产资源量和开采价值,通过对该矿床地质特征及成矿规律的分析,以及对该区找矿勘查历史的回顾,认为在勘查过程中,必须要将地表找矿与深部验证相结合,充分发挥其老窿的探矿作用,找矿才能取得突破的效果.     

湖南盈洞铜-银矿床地质特征及找矿方法探讨

盈洞铜-银矿是上世纪80年代中期发现并开发的一个小而富的矿床，现仍具备较大的矿产资源量和开采价值，通过对该矿床地质特征及成矿规律的分析，以及对该区找矿勘查历史的回顾，认为在勘查过程中，必须要将地表找矿与深部验证相结合，充分发挥其老窿的探矿作用，找矿才能取得突破的效果。     

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.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of