青海祁漫塔格地区岩石地球化学特征对三叠纪 多金属矿床找矿的指示

《找矿突破战略行动纲要（2011~2020年）》指出,加强基础地质调查与研究和以油气、铁、铜、铅、锌等为重点加强能源矿产勘查是找矿突破战略行动的重要任务。青海祁漫塔格地区位于东昆仑成矿带,是我国首批国家级整装勘查区之一,也是我国西部Fe、Cu、Pb-Zn矿产最重要和最有找矿潜力的地区之一。近年来,随着找矿突破战略行动的实施,该地区找矿工作取得了一系列重要的成果,但是在多金属矿床找矿方面一直没有取得较大的突破。区内多金属矿床主要与三叠纪花岗质岩石有关,其成矿作用的复杂性和多样性在国内外都十分罕见（丰成友等,2012;赵一鸣等,2013）。然而,到目前为止,对于该地区成矿规律的研究仍然较薄弱,严重制约了进一步的找矿工作。因此,查明成矿规律,寻找新矿产地、推进找矿突破,刻不容缓。本文在区内多金属矿床与三叠纪花岗质岩石存在密切成因联系的基础上,从岩石地球化学特征出发,提出了初步的找矿建议。     

新疆地质矿产勘查回顾与展望

随着地勘投入的不断增加,"十一五",尤其是新疆"358"项目启动以来,新疆地质矿产勘查取得了有史以来最为突出的成果.煤炭、铁矿、钠硝石及重要有色金属矿产成果尤为突出,水文地质勘查取得了新成果,基础地质勘查程度大幅提高,科学研究及高新技术应用推动了找矿突破进程."十二五"是实现新疆"358"目标任务的关键时期,在"十一五"成果基础上,继续按"358"总体部署,强化重要成矿带及远景区的基础地质及调查评价工作,加强找矿突破关键问题的科技攻关及高新技术方法的应用,加大重要矿集区整装勘查力度,努力实现地质找矿新突破.     

新疆地质矿产勘查2011年主要成果和进展

2011年,新疆地质勘查在全国地质找矿突破战略行动指导下,紧紧围绕自治区产业发展,加强基础地质调查,突出重要矿带、矿集区和矿床评价,加大新技术新方法推广应用,以煤、铁、镍、钼等矿产为重点的找矿取得重大进展,实现了新疆地质勘查"十二五"良好开局.本文概略综述了新疆2011年地质矿产勘查在煤矿、铁矿、有色金属、贵金属、区域地质、物化遥、水文地质等方面取得的重要进展和新成果,提出2012年全疆地质勘查工作设想和建议.     

1∶50 000矿产地质图编制与数据库建设要求

1∶50 000固体矿产地质调查是保障国家能源资源安全的长期的基础性、公益性、战略性地质工作,是矿产勘查的重要基础和先导性工作,是国家地质调查与地球系统科学研究程度的重要指标,目的是摸清国家矿产资源家底、实现重大找矿突破或新发现、引导和拉动后续矿产勘查,在服务国家重大战略、社会发展和生态文明建设中发挥着重要的作用。2019年中国地质调查局正式印发《固体矿产地质调查技术要求(1∶50 000)》(DD2019-02),创建了以成矿作用类型为主线、以成矿要素为对象、以预研究为基础、以矿产地质专项填图为核心、按成矿作用类型填(编)建造构造图的新方式和基于矿床模型综合地质信息预测方法的矿产资源潜力评价技术体系,建立了地质潜力、技术经济可行性和环境影响“三位一体”综合评价工作体系,为固体矿产地质调查及其成果表达指明方向,为支撑固体矿产勘查提供技术保障。其中1∶50 000矿产地质图是固体矿产地质调查核心成果图件,在此结合技术要求简要阐述1∶50 000矿产地质图编制与数据库建设要求。     

甘肃省地矿局“十一五”期间地质调查与找矿成果综述

综述了甘肃省地矿局＂十一五＂时期,在基础地质调查、固体矿产勘查中取得的重要进展,认为＂十一五＂时期是地质找矿和地勘行业改革发展的黄金期。地质勘查规模逐年增长,基础地质调查工作程度进一步提高,地质找矿成果显著。文章还就＂十二五＂基础地质调查与找矿工作提出规划建议,对矿产勘查工作具有指导意义。     

中国地质调查局大宗急缺矿产和战略性新兴产业矿产调查工程整装勘查区基础地质调查与潜力评价工程进展

正为全力支撑和服务找矿突破战略行动,中国地质调查局紧密围绕国家重大需求,部署实施了大宗急缺矿产和战略性新兴产业矿产调查工程、整装勘查区基础地质调查与潜力评价工程,取得一批重大找矿成果,为国家能源资源安全保障和战略性新兴产业发展提供了重要基础支撑。一、大宗急缺矿产和战略性新兴产业矿产调查工程     

中国矿产资源战略性勘查进展(2013—2014年)

矿产资源战略性勘查是中国地质调查局组织实施的地质矿产调查评价专项中的一项重要任务,紧紧围绕找矿突破战略行动,突出重点矿种和重点地区,开展矿产远景调查、油气资源调查、战略性矿产调查评价、老矿山深部及外围找矿等工作。2013—2014年共实施矿产资源战略性勘查项目900余项,取得一批重要发现和进展,促进和拉动了商业性地质勘查,形成了一批重大找矿成果。     

新形势下发展地质调查事业的新思路

在2008年全国地质调查工作会议工作报告中,汪民同志指出：发展地质调查事业要有新思路。 一是矿产勘查要有新机制。要发挥公益性地质调查工作的基础先行作用,统一部署重点成矿区带的地质勘查,形成以政府投入为引导、社会投资为主体,风险自担、收益自享,多渠道投入地质找矿的矿产勘查新机制。     

吉林省地质矿产勘查开发局“十一五”地质找矿重要进展及“十二五”总体工作部署

对吉林省地质矿产勘查开发局＂十一五＂地质找矿工作进行了系统总结。基础地质调查工作程度进一步提高,矿产资源远景调查工作长足发展,地质找矿工作取得重大突破,水工环工作取得重要成果。实现了以地质工作为中心,以地质勘查拉动全局经济发展的战略,推动了地勘主导产业的稳步发展。对全局＂十二五＂地质找矿工作进行科学部署。开展基础性、公益性地质调查评价,以找大型—超大型贵金属有色金属矿床为目标,采用地质、物探、化探、遥感等技术相结合的有效方法开展综合找矿评价。加强面上的异常查证和矿点检查,进一步的筛选靶区,寻找新的矿产地,对有望取得突破的矿产地,加强普查,分国家整装勘查、省内整装勘查、重点勘查3个层次进行矿产资源评价,从整体上推进吉林省地质找矿工作的进程。     

世界有色金属矿产勘查的进展及走势分析

近年来世界有色金属勘查进展最大的矿种是铜、金,次为铅锌银、镍钴,钨、钼、锑找矿进展不大。美洲找矿成果最为显著,次为澳大利亚、西南太平洋和东南亚地区。勘查地球化学的偏提取技术寻找隐伏矿作用显著。这些找矿进展主要启示有：加强基础地质工作,正确选择靶区,选择合理勘查方法是找矿取得成果的前提和关键。攻深找盲是寻找超大型矿床和富矿的重要途径。增加投入,治理好勘查投资环境,吸引外资进行矿产勘查是快速取得勘查成果的重要措施。未来勘查走势是铜、镍走低,金前景不明朗,铅锌、银稳中有升,钨、锑将逐步回升     

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