共查询到20条相似文献，搜索用时 515 毫秒
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文章介绍了黑宝山-木耳气盆地的经济地理秦件，地质环境背景，阐述了盆地的主要环境地质问题。第一环境地质问题即自然环境中存在的与地质有关的各种问题，它是由内动力地质作用和外动力地质作用引起的；区内主要有冻土。第二环境地质问题即由于人类各种工程、经济活动而引起昀与地质环境有关的问题；如水土流失、矿井塌陷、地表水、地下水及土壤污染等。论述了各环境地质问题产生的地区，分析了各主要问题的特征，形成条件及危害。 相似文献
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四川省历时7年建立了四川省重要地质钻孔数据库，该数据库由图表数据库和属性数据库两部分组成。其中图表数据库涵盖67086个地质钻孔的基本信息，以“三图一表”的形式进行表达，属性数据库包含8537个地质钻孔，包括钻孔工程信息、钻孔地质信息、样品测试数据等相关数据项。钻孔数据已在全国重要地质钻孔数据库服务平台、四川省重要地质钻孔数据库服务平台、四川省重要地质钻孔数据库展示平台上集成与展示。在该数据库建设成果的基础上，通过数据结构分析及可视化处理功能，实现了对成果的统计分析，并对城市规划与地下空间开发、重大工程选址、安全生产与应急救援等应用场景进行了模拟，在应用场景模拟中，通过数据清洗与挖掘、三维地质建模、地质三维分析等功能，实现了地质数据的二次开发利用，提高了四川省地质资料数字化、信息化水平，增强了地质数据的社会显示度。 相似文献
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实现文本中地质信息的结构化抽取、语义解析、可视化表达和知识图谱构建，将为地质大数据的深度挖掘与利用提供有力的数据基础和技术支撑。无论是采用传统统计模型还是深度学习模型，地质信息语义解析均需要已标注的语料库的支持。特别是，地质信息的文本描述具有领域性特征，无法通过通用自然语言语料迁移实现。因此，不同层次的地质信息标注语料库的构建成为地质语义信息解析的关键和基础。文章在分析中文文本中地质语义信息描述语言特点的基础上，从地质实体的时空和属性描述特征出发，清晰表达地质实体的各种语义关系，制定了中文文本的地质语义信息标注体系和标注规范，自主研发了“交互式地质语义信息标注工具”，解决了传统人工标注存在错误率高、重复工作量大等缺点，以矿产资源的中文研究文献和报告为数据源，构建了大规模地质语义信息标注语料库，较为有效地解决了当前相关标准和规模化标准数据匮乏的问题。 相似文献
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本文扼要论述了地质环境质量损益经济评价的基本思路，主要指标以及中，小型水利水电工程地质环境质量损益经济评价模型；并根据中，小型水利水电工程实施可能产生的环境地质问题，阐述了中，小型水利水电工程地质环境质量损益评价结果，探讨了中，小型水利水电工程合理开发利用地质环境及防治地质灾害的对策。 相似文献
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我们在满怀信心地跨人“十一五”之际，新年1月28日，新华社授权播发了《国务院关于加强地质工作的决定》。《决定》全面分析了我国地质工作面临的新形势，明确了新时期地质工作的地位作用、总体要求、主要任务以及加强地质工作的主要措施。这是国务院加强地质工作的重大决策，是我国地质工作历史进程中具有里程碑意义的大事，这表明我国第二轮地质找矿工作的春天已经到来了!我们一定要认真分析地质工作形势，深刻领会《决定》精神，以全新的姿态，抓住机遇，迎接挑战。 相似文献
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构造地质成因分析，在油气田开发中具有十分重要的作用。文章从国内外研究现状入手，在文献调研基础上详细对
比了油气田开发中构造地质成因分析的优缺点。总结了构造地质成因分析研究内容：（1） 通过构造演化历史分析和地应力
场等研究，确定断裂体系构造地质成因。（2） 井震结合开展精细的构造解释，分析构造地质成因。（3） 对构造地质成因研
究方法进行探索和改进。（4） 综合动静态资料，开展储层地质成因分析。（5） 与沉积相研究和成岩作用研究等紧密结合。
（6） 加强地质成因分析成果应用，为油气田开发提供基础。（7） 裂缝表征和建模。（8） 微构造地质成因分析。油气田开发
中构造地质成因分析的方法主要包括：基础地质研究、野外露头观察描述、岩心观察和描述、镜下薄片观察、物理模拟、
各种测井解释、地震解释、各种分析测试统计、地质建模、动态监测和生产动态分析方法等。结合研究实践，对每一种方
法的优缺点进行分析。在此基础上，指出了油气田开发中构造地质成因分析存在的8方面主要问题和发展趋势。 相似文献
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针对目前地质勘查中刻槽取样工作存在的问题，从地质大调查的需要出发，研制了便携式地质刻槽取样机，介绍了其主要技术指标、基本结构、工作原理及野外生产试验简况。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
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. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
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. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
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. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
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). 相似文献
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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 相似文献
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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), 相似文献
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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- 相似文献
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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- 相似文献
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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.) 相似文献