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Characteristics and genesis of groundwater salinization in coastal areas of the Lower Reaches of Oujiang Basin

Journal of Groundwater Science and engineering 2024年第2期12卷 190-204页

作者： Mei-hui Zhang Shi-yang Zhou Dan-dan liu Ying Zhang Yu-xi Zhang Xi Chen Hui-wei wang Bei Li Wei Kang Bing Yi Wan-peng Shi institute of Hydrogeology and environmental geology Chinese Academy of Geological SciencesShijiazhuang 050061China Fujian Provincial Key Laboratory of Water Cycling and Eco–geological Processes Xiamen 361021FujianChina China University of Geosciences(beijing) Beijing 100083China Changsha Center of Natural Resources Comprehensive Survey China Geological SurveyChangsha 410600China Hydrogeological environmental geological Survey Center of China geological Survey Tianjin 071501China China University of Geosciences Wuhan 430074China

The coastal areas of the lower reaches of Oujiang River Basin are rich in groundwater ***,the unsustainable exploitation and utilization of groundwater have led to significant changes in the groundwater *** the characteristics and genesis of groundwater salinization is crucial for preventing its deterioration and ensuring sustainable *** this study,a comprehensive approach combining the ion ratio method,mineral saturation index method and multivariate statistical analysis was employed to investigate the hydrochemical characteristics and main controlling factors in the study *** findings reveal that:(1)Groundwater samples in study area exhibit a neutral to slightly alkaline *** predominant chemical types of unconfined water are HCO_(3)-Ca·Na,HCO_(3)·Cl-Na·Ca and HCO_(3)·SO_(4)-Ca·Na,while confined water mainly exhibits Cl·HCO_(3)-Na and Cl-Na types.(2)Salinity coefficients indicate an increase in salinity from unconfined to confined ***,Na^(+)and Cl^(–)concentrations show an increasing trend from mountainous to coastal areas in unconfined water,while confined water displays variability in TDS,Na^(+)and Cl^(–)concentrations.(3)Groundwater salinity is mainly influenced by water-rock interactions,including the dissolution of halite and gypsum,cation exchange,and seawater intrusion ***,human activities and carbonate dissolution contribute to salinity in unconfined *** intrusion is identified as the primary factor leading to higher salinity in confined water compared to unconfined water,with increasing cation exchange and seawater interaction observed from unconfined to confined water.

关键词： Hydrochemical Multivariate statistical analysis Seawater intrusion

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西藏邦铺钼(铜)多金属矿床隐爆角砾岩型矿体的发现及找矿意义

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矿床地质 2024年第5期43卷 1081-1094页

作者：王晓青刘敏长安大学地球科学与资源学院陕西西安710054 山西省地质勘查局214地质队有限公司山西运城044000 中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037

邦铺矿床为冈底斯成矿带东段一个大型斑岩-矽卡岩Mo(Cu)多金属矿床,笔者首次在矿区东部发现了隐爆角砾岩型Pb-Zn-Cu矿体,从而进一步深化完善了邦铺斑岩成矿系统。通过详细的钻孔地质编录和岩相学研究发现,角砾岩筒在垂向上和横向上具有... 详细信息

邦铺矿床为冈底斯成矿带东段一个大型斑岩-矽卡岩Mo(Cu)多金属矿床,笔者首次在矿区东部发现了隐爆角砾岩型Pb-Zn-Cu矿体,从而进一步深化完善了邦铺斑岩成矿系统。通过详细的钻孔地质编录和岩相学研究发现,角砾岩筒在垂向上和横向上具有明显的分带性:从浅部到深部,从角砾岩筒中心到边部,依次为爆破相-震碎相-震裂相-裂隙相。角砾岩型Pb-Zn-Cu矿体主要赋存于角砾岩筒的裂隙相和震裂相中,少数赋存于震碎相和爆破相中。方铅矿和闪锌矿呈脉状、网脉状、条带状产于裂隙相的裂隙中和震裂相胶结物中。根据隐爆角砾岩中石英二长斑岩角砾LA-ICP-MS锆石U-Pb年龄((14.51±0.12)Ma)将隐爆角砾岩的形成年龄限定在~14 Ma,该年龄与斑岩矿体成矿年龄((14.67±0.54)Ma~(14.11±0.31)Ma)及矽卡岩矿体成矿年龄((13.93±0.87)Ma)相一致,统一的形成年龄说明隐爆角砾岩应为斑岩成矿系统的一部分。根据斑岩成矿系统中各类型矿体的分布规律,结合冈底期成矿带碰撞造山背景下后碰撞阶段斑岩成矿系统多中心复合成矿的特征,推测邦铺矿区东部很可能还存在另一个同期的斑岩型矿化中心。

关键词：隐爆角砾岩石英二长斑岩斑岩-矽卡岩矿床邦铺Mo(Cu)多金属矿床

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Planning and construction of Xiong’an New Area(city of over 5 million people):Contributions of China’s geologists and urban geology

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China geology 2024年第3期7卷 382-408页

作者： Bo Han Zhen Ma Liang-jun Lin Hong-wei liu Yi-hang Gao Yu-bo Xia Hai-tao Li Xu Guo Feng Ma Yu-shan wang Ya-long Zhou Hong-qiang Li Tianjin Center China Geological Survey(North China Center of Geoscience Innovation)Ministry of Natural ResourcesTianjin 300170China Xiong’an Urban geological Research Center China Geological SurveyMinistry of Natural ResourcesTianjin 300170China Tianjin Key Laboratory of Coast geological Processes and environmental Safety Tianjin 300170China China institute of Geo-environment Monitoring Beijing 100081China institute of Hydrogeology and environmental geology Chinese Academy of Geological SciencesShijiazhuang 050061China Center for Hydrogeology and environmental geology China Geological SurveyMinistry of Natural ResourcesBaoding 071051China institute of Geophysical&Geochemical Exploration Chinese Academy of Geological SciencesLangfang 065000China chinese academy of geological sciences Beijing 10037China

China established Xiong’an New Area in Hebei Province in 2017,which is planned to accommodate about 5 million people,aiming to relieve beijing City of the functions non-essential to its role as China’s capital and to expedite the coordinated development of the beijing-Tianjin-Hebei *** 2017 to 2021,the China geological Survey(CGS)took the lead in multi-factor urban geological surveys involving space,resources,environments,and disasters according to the general requirements of“global vision,international standards,distinctive chinese features,and future-oriented goals”in Xiong’an New Area,identifying the engineering geologic conditions and geologic environmental challenges of this *** achievements also include a 3D engineering geological structure model for the whole area,along with“one city proper and five clusters”,insights into the ecology and the background endowment of natural resources like land,geothermal resources,groundwater,and wetland of the area before engineering construction,a comprehensive monitoring network of resources and environments in the area,and the“Transparent Xiong’an”geological information platform that is open,shared,dynamically updated,and three-dimensionally ***’s geologists and urban geology have played a significant role in the urban planning and construction of Xiong’an New Area,providing whole-process geological solutions for urban planning,construction,operation and *** future urban construction of Xiong’an New Area will necessitate the theoretical and technical support of earth system science(ESS)from various aspects,and the purpose is to enhance the resilience of the new type of city and to provide support for the green,low-carbon,and sustainable development of this area.

关键词： Low Carbon New City Planning and construction Land Geothermal resources Groundwater Wetland Underground space Geologic disasters site stability Natural resource Ecosystem geological safety Transparent Xiong’an Resilient city Xiong’an New Area

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Distribution characteristics and oil mobility thresholds in lacustrine shale reservoir:Insights from N_(2)adsorption experiments on samples prior to and following hydrocarbon extraction

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Petroleum Science 2022年第2期19卷 486-497页

作者： Long-Hui Bai Bo liu Yi-Jing Du Bo-Yang wang Shan-si Tian liu wang Zhi-Qiang Xue Accumulation and Development of Unconventional Oil and Gas State Key Laboratory Cultivation BaseNortheast Petroleum UniversityDaqingHeilongjiang 163318China Hubei Key Laboratory of Petroleum Geochemistry and environment Yangtze UniversityWuhanHubei 430100China Research institute of Petroleum Exploration&Development Beijing100083China No.1 institute of geological and Mineral Resources Survey of Henan LuoyangHenan 471000China

The pore structure and oil content of shales have an important influence on the oil mobility and *** this study,the lacustrine shale samples from the Qingshankou Formation(Q1)of Songliao Basin were ***,pyrolysis,XRD and nitrogen adsorption were performed on the original and extracted shale *** the influence of mineral composition and organic matter(OM)on the development of nano-scale pore,the oil phase states and mobility were *** Q1 shale samples can be sub-divided into three types according to the isotherm *** A samples are characterized by high kerogen content,with oil mainly existing in the free phase *** B samples are characterized by medium kerogen content,oil mainly exists in the absorbed phase *** C samples are characterized by low kerogen content,with trace oil found in the absorbed phase ***-scale organic pores are well developed in the Q1 *** is primarily found in the pore spaces with diameters less than 10 nm,this being the pore size threshold for mobile shale *** TOC>2.0 wt%and EOM>1.0 wt%,Q1 Formation shale oil mobility is high,resulting in prospective drilling targets.

关键词： Shale oil mobility Oil phase state Extraction Nitrogen adsorption

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Addressing severe slope failure hazards along sichuan-Tibet Highway in Southwestern China

Addressing severe slope failure hazards along Sichuan-Tibet ...

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中国科学院地质与地球物理研究所2003学术年会

作者： Shang Yanjun~1,Yue Zhongqi~2,Yang Zhifa~1,wang Yangchun~3,and liu Da’an~1 1.institute of geology and Geophysics,chinese academy of sciences,beijing 100029,China, 2.Department of Civil engineering,The University of Hong Kong,Hong Kong,China 3.institute of Mountain Hazards and environment,chinese academy of sciences & Water Conservancy Ministry,Chengdu 610041,China

This paper presents the results of recent field investigations on the geological hazards along the sichuan-Tibet Highway in Southwestern *** was found that one section of the highway has been facing severe problems in slope *** is the section between Linzhi and Basu and it has been the most dangerous part of the highway system to road users over the last fifty years. Based on the examination of structural geology,Quaternary geology,stratigraphy and petrography,this paper presents the classification,distribution and hazard levels of the slope failures along the highway section. The failures usually occurred in slopes comprising Quaternary glacial deposits,fluvio-lacustrine deposits and residual *** can be classified as landslides, mud-rock flows,grain flows on slopes and rock *** are caused by four main factors:a) intense active tectonic movements,b) on-going alpine canyon relief,c) heavy precipitation and d) irrational human *** paper further discusses the engineering measures adopted by the relevant organizations over the past fifty *** on the investigations,the paper summarizes some useful recommendations to effectively address and mitigate the severe slope failure hazard problem for safe operation of the highway and future railway systems.

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陡倾结构金属矿山岩移规律的模型试验研究

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岩土力学 2024年第5期45卷 1412-1422页

作者：刘秀敏范凯王月王文中陈从新中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071 中国科学院大学北京100049 武钢资源集团金山店矿业有限公司湖北黄石435116

陡倾地质结构金属矿床大部分形成于构造断裂带,崩落法开采会产生显著的岩层移动现象。以湖北黄石的金山店铁矿典型地质剖面为基础,构建地质结构模型。通过缩尺物理模型试验,研究陡倾地质结构对崩落法采矿岩层移动的影响规律。研究结果表... 详细信息

陡倾地质结构金属矿床大部分形成于构造断裂带,崩落法开采会产生显著的岩层移动现象。以湖北黄石的金山店铁矿典型地质剖面为基础,构建地质结构模型。通过缩尺物理模型试验,研究陡倾地质结构对崩落法采矿岩层移动的影响规律。研究结果表明,受陡倾地质结构的影响,采空区岩层移动可分为缓慢增长、快速增长与地表塌陷破坏3个阶段,其中上盘岩移范围远大于下盘,上盘以倾倒变形破坏为主,下盘以剪切滑移破坏为主;采空区顶板岩层一方面不断崩落填充采空区控制岩移,另一方面形成冒落拱,以拱脚抵制上下盘陡倾岩层朝向采空区移动;当顶板崩落至地表后冒落拱的支撑作用消失,近采空区的上盘岩层发生倾倒折断塌陷,下盘岩层发生剪切滑移塌陷。

关键词：金属矿山开采模型试验陡倾地质结构岩层移动冒落拱

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地震多发区资源环境承载力评价——以泸定地震为例

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Journal of Resources and Ecology 2024年第1期15卷 161-172页

作者：刘佳卓王卷乐李凯中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室北京100101 中国科学院大学北京101408 江苏省地理信息资源开发与利用协同创新中心南京210023

地震是全球面临的主要自然灾害威胁之一,每年直接造成数十亿美元的经济损失和大量人员伤亡。研究地震多发区的环境和资源承载能力,是区域抗震救灾和灾后重建的迫切需要。本研究以中国四川省甘孜藏族自治州(简称甘孜州)为研究对象,重点研... 详细信息

地震是全球面临的主要自然灾害威胁之一,每年直接造成数十亿美元的经济损失和大量人员伤亡。研究地震多发区的环境和资源承载能力,是区域抗震救灾和灾后重建的迫切需要。本研究以中国四川省甘孜藏族自治州(简称甘孜州)为研究对象,重点研究2022年甘孜州泸定6.8级地震的影响,建立了地震多发区资源环境承载力评价体系。研究从生态、社会经济、地质等方面选取23个指标,采用层次分析法确定各指标的权重,采用与理想解相似的排序偏好加权法,计算了各县市区资源环境承载力的相对排序。在此基础上,对甘孜州灾后重建战略进行了评价和分析。结果表明,各行政区域的资源环境承载力存在区域差异:受社会经济和生态地质环境的共同影响,甘孜州东南部的资源承载力普遍高于西北部。本研究为地震多发区提供了承载力评估数据和支撑方法。

关键词：地震灾害泸定地震资源环境承载力指标体系甘孜藏族自治州

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40Ar/39Ar Age and geological significance of Lamprophyres in Pishan on the SW Margin of the Tarim Terrane,NW China

40Ar/39Ar Age and Geological Significance of Lamprophyres in...

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中国科学院地质与地球物理研究所2003学术年会

作者： HE Huaiyu,GUO Zhengfu,wang Songshan,HAO Jie,liu Qiang institute of geology and Geophysics,chinese academy of sciences,P.O.Box 9825, beijing 100029,China and Ariel BOVen Laboratory of Geochronology,Vrije Universiteit Brussel,Pleinlaan 2, 1050 Brussels,Belgium

The dike swarm of lamprophyres at Pishan on the SW margin of the Tarim terrane is composed of ultra-potassic lamprophyres mat have intruded into the Proterozoic hornblende ***/Ar dating data suggest that the isochron ages for phlogopite and whole rock separates of the lamprophyres are 231.7±0.3 Ma and 228.5±0.3 Ma, *** data indicate that the dikes were derived from a subduction-related or metasomatized mantle. During the Middle-Late Triassic the western Kunlun area entered the post-orogeny period,and thus the occurrence of the dike swarm in the study area may have been controlled by underplating.

关键词： Tarim western Kunlun Triassic lamprophyre Ar-Ar age

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祁连造山带中生代古地磁新结果及其地质意义

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地球物理学报 2024年第7期67卷 2744-2760页

作者：谭金生王彬段亮孟庆任刘萍西北大学地质学系大陆动力学国家重点实验室西安710069 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029

祁连造山带位于青藏高原北部,保存了古特提斯洋和新特提斯洋关闭过程的远程构造响应记录.为了确定祁连造山带多期次构造响应事件的变形特征,本文在南祁连构造带天峻县中三叠世及北祁连构造带祁连县早白垩世地层中进行了详细的古地磁学... 详细信息

祁连造山带位于青藏高原北部,保存了古特提斯洋和新特提斯洋关闭过程的远程构造响应记录.为了确定祁连造山带多期次构造响应事件的变形特征,本文在南祁连构造带天峻县中三叠世及北祁连构造带祁连县早白垩世地层中进行了详细的古地磁学及岩石磁学研究.实验结果显示,三叠纪样品分离出了稳定的高温特征剩磁并在样品水平下通过了倒转检验,白垩纪样品分离出的高温特征剩磁通过了褶皱检验.代表了岩石形成时的原生磁化,相对应的古地磁极为:(T2:82.3°N, 223.6°E,A95=4.8°;K1:65.9°N, 188.3°E,A95=6.2°).对比同时代阿拉善、华北古地磁数据表明:中三叠世之后,天峻地区相对于阿拉善参考极发生了20.2±6.8°的顺时针旋转.早白垩世之后,祁连地区相对于华北参考极没有发生明显的块体旋转(0.3±8.6°).结合前人的研究成果,我们认为晚侏罗世-早白垩世拉萨/欧亚碰撞的远程效应造成祁连造山带东西两侧发生差异性构造缩短活动(西段以逆冲推覆构造缩短为主,东段以走滑活动为主),从而造成祁连整体发生顺时针旋转.早白垩世之后,祁连西段阿尔金断裂附近及东段西宁—兰州盆地发生区域性构造旋转,祁连主体以NE向构造缩短为主.

关键词：中生代构造旋转祁连造山带古地磁学

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围压和裂隙倾角对花岗岩力学行为的影响研究

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岩土工程学报 2024年第3期46卷 578-586页

作者：王春萍刘建锋刘健王璐薛福军核工业北京地质研究院北京100029 国家原子能机构高放废物地质处置创新中心北京100029 四川大学水利水电学院四川成都610065 西华大学建筑与土木工程学院四川成都610039

含裂隙围岩的力学行为对高放废物地质处置库的长期稳定和安全至关重要。为研究围压和裂隙倾角对花岗岩围岩力学行为的影响,以完整花岗岩和含不同倾角贯通单裂隙的花岗岩为研究对象,开展了单轴压缩和三轴压缩试验研究。结果表明:0~10 MP... 详细信息

含裂隙围岩的力学行为对高放废物地质处置库的长期稳定和安全至关重要。为研究围压和裂隙倾角对花岗岩围岩力学行为的影响,以完整花岗岩和含不同倾角贯通单裂隙的花岗岩为研究对象,开展了单轴压缩和三轴压缩试验研究。结果表明:0~10 MPa围压范围内,倾角30°和60°裂隙花岗岩分别发生了穿裂隙面破坏和沿裂隙面滑移破坏;随围压升高,倾角45°裂隙花岗岩由复合破坏转变为穿裂隙面破坏,后又在10 MPa围压条件下再次转变为倾斜“Z”字型裂纹的复合破坏。围压的存在制约了预制裂隙面的劣化作用。三轴压缩条件下低倾角裂隙花岗岩的抗压强度及变形发展曲线与完整花岗岩的结果相近,试样峰值破坏时的轴向应变在围压0,2,5,10MPa条件下分别约为0.38%,0.49%,0.59%和0.75%。沿裂隙面滑移破坏试样的抗压强度以及峰值破坏时的轴向应变均显著低于穿裂隙面破坏试样的相关结果,且其抗压强度与试验前后裂隙面的分形维数差值符合幂函数增长关系。

关键词：北山花岗岩裂隙三轴压缩破坏形式高放废物地质处置

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