变化环境下澜沧江-湄公河流域干旱趋势

为提升变化环境下澜沧江-湄公河(简称澜湄)流经国对干旱的抵御能力,亟需对流域未来干旱趋势进行科学研判。本研究选取了CMIP6的5个GCM模式,使用3种共享社会经济路径-典型浓度路径组合情景下的驱动数据,采用分布式水文模型CREST-Snow,预估了2020—2050年澜湄径流演变和气象、水文干旱发展趋势,量化了澜沧江梯级水库调度对未来径流的调节作用。结果表明：2020—2050年,澜湄流域整体呈湿润趋势,但极端干湿事件发生频率增加,其中2020—2029年干旱频发,2030—2050年更偏湿润,老挝、泰国2020—2050年干旱发生的频率和强度比流域内其他国家更高;澜沧江梯级水库可有效提升下游干季径流量,增幅从上游(99%)至下游(68%)递减,在缓解湄公河干季旱情方面具有重要作用。未来有待进一步加强澜湄水资源合作,优化水库调度方式,促进澜湄流经国水旱灾害防治。     

中加基岩地质填图与三维地质建模合作交流经验与启示

区域地质填图工作向三维地质调查和建模发展是各国地质调查机构关心的热点,为此中国地质调查局与加拿大萨斯喀彻温省地质调查局开展了为期3年的三维地质调查技术交流合作。基于加拿大萨省北部前寒武纪地区的实地填图工作和三维地质建模技术交流,详细介绍了加方从项目部署、资料收集、野外工作、成果表达等进行基岩地质填图的工作方法和在此基础上开展三维地质建模的技术要点。萨省地质调查局以问题和需求为导向开展填图工作,在人员安排、数据管理和软件平台建设方面充分考虑地质填图-三维建模的连贯性,注重信息公开共享以服务社会,相关经验值得学习借鉴。     

中国-上海合作组织地学合作研究中心简介

正"中国-上海合作组织地学合作研究中心"是经外交部倡议,原国土部批准,于2014年10月依托中国地质调查局西安地质调查中心正式挂牌成立。它是与国内相关地学机构相联合,面向上海合作组织及丝路沿线国家开展地学多领域合作的国际科技研究中心;是上合组织框架下的三个国际合作中心之一。主要职责:围绕国际地学研究前沿,凝聚国内外地学领域一流科学家,立足中亚、西亚和中东欧重大基础地质、资源、能源和环境等科技问题,开展跨境重要成矿     

中国-上海合作组织地学合作研究中心简介

正"中国-上海合作组织地学合作研究中心"是经外交部倡议,原国土部批准,于2014年10月依托中国地质调查局西安地质调查中心正式挂牌成立。它是与国内相关地学机构相联合,面向上海合作组织及丝路沿线国家开展地学多领域合作的国际科技研究中心;是上合组织框架下的三个国际合作中心之一。主要职责:围绕国际地学研究前沿,凝聚国内外地学领域一流科学家,立足中亚、西亚和中东欧重大基础地质、资源、能源和环境等科技问题,开展跨境重要成矿     

市地勘局与中国地质图书馆签署文献资源共建共享协议

（段海明）9月13日,市地勘局与中国地质图书馆签订文献资源共建共享协议。市地勘局局长魏连伟、中国地质图书馆馆长顾哓华分别讲话并代表双方在协议上签字,开展文献资源共建、服务合作。合作将大力提升地学丈献信息资源保障水平,有效促进地质科研进步,为落实国土资源部找矿新机制和地质找矿战略突破行动目标提供坚强保障。     

关于“一带一路”地学合作若干问题的思考

自我国政府提出"一带一路"建设倡议以来,引起了广大地质工作者的高度重视。本文从"一带一路"地区地质条件、资源禀赋特征,以及我国与"一带一路"沿线国家地学合作前期基础,提出了创新地学领域合作机制、地学合作填图、合作开展能源和重要矿产资源现状利用调查和资源潜力评价、共建地质矿产资源信息系统、创新地学人才培养机制等合作构想,以期推进地球科学创新发展,实现"一带一路"能源及重要矿产资源开发利用合作共赢,共享人类社会文明成果。     

国家地学文献信息资源有效利用的思考

通过简要介绍国内外文献信息资源共建共享服务体系及现状,对比分析了中国地质调查局直属单位地学文献资源状况及中国地质图书馆文献资源现状及利用情况.在此基础上有针对性地提出了中国地质图书馆开展地学文献信息资源共建共享工作的初步思路.     

中国地质调查国际合作平台简介

<正>中国地质调查局自2003年以来,把对外国际合作作为服务全球地球科学研究、国际产能合作、建设世界一流新型地质调查局的重要抓手,利用双边合作项目协议、人员交流与国际培训、矿业合作平台(中国国际矿业大会、中国东盟矿业合作论坛等)和区域/专业业务合作研究平台等,与全球50多个国家广泛开展地球科学和地质勘查领域的国际交流与合作。国际合作的广度和深度不断拓展,促进了国际地学的发展和广大发展中国家地质调查能力的提高,也极大地     

中国-上海合作组织地学合作研究中心简介

正"中国-上海合作组织地学合作研究中心"是经外交部倡议,原国土部批准,于2014年10月依托中国地质调查局西安地质调查中心正式挂牌成立。它是与国内相关地学机构相联合,面向上海合作组织及丝路沿线国家开展地学多领域合作的国际科技研究中心;是上合组织框架下的三个国际合作中心之一。     

地球科学大数据的管理与共享：以英国地质调查局为例

大数据驱动的研究范式正在引起地学领域的革命,而海量大数据的有效管理和共享是数据高效利用的前提。英国地质调查局作为最早成立的国家地质调查局,拥有海量的地学数据资源,通过近年来对数字化工作的全面推进,在数据的开放共享方面走在了世界各国的最前沿。文章对英国地质调查局的数据资源管理和数据共享方式进行了分析调研,详细介绍了他们的一站式管理平台——开放地学的主体组成,以及他们与同行合作建设的数据库。开放地学全面汇总了地调局内的数据资源,并通过一系列数据共享将所有数据集有机链接,通过数据和模型的巧妙结合,在满足用户数据需求的同时,对数据的应用进行了全方位的拓展,是地球系统科学研究框架下地球科学数字化工作的良好典范。     

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

正~~     

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