检索结果-南通市图书馆

chinese Science Bulletin 2003年第22期48卷 2500-2506页

作者： wan yusheng1,2,{1., chinese academy of geological sciences, beijing 100037, china 2. beijing SHRIMP Laboratory, beijing 100037, china Correspondence should be addressed to wan yusheng (e-mail: wanyusheng@***) institute of {1. Chinese Academy of Geological Sciences Beijing China beijing SHRIMP Laboratory Beijing China

The Mesoproterozoic Changcheng System is widely distributed in the North china Craton. Determining its time of deposition and sources is important to understand the Precambrian crustal evolution of the North china Craton. This paper suggests age distribution patterns for detrital zircons from clastic sediments of the Changcheng System in the Ming Tombs area, beijing. Samples of feldspar-bearing sandstone (CHc-2) and pure sandstone (CHc-9) were collected from the Changzhougou Formation, which constitutes the basal part of the Changcheng System. Detrital zircons show an age range from 2.35 to 2.60 Ga. However, sample CHc-9 in the upper Changzhougou Formation also contains some zircons with ages of 1.9-1.8 Ga and 2.3-2.1.Ga. The age patterns lead to the following conclusions: (1. Most of the detrital material came from a source area composed predominantly of ~2.5 Ga continental crust of the North china Craton; (2) 1.9-1.8 Ga reflects the age record of Palaeoproterozoic continent-continent collisional event in the North china Craton; and (3) the oldest age for deposition of the Changcheng System is 1.8 Ga.

关键词：锆石原岩中国北部地区地壳演变

世界典型高温地热田回灌经验及对谷露热田回灌井部署的启示

在线全文

学校读者我要写书评

暂无评论

世界核地质科学 2024年第4期41卷 745-755页

作者：张松郑冉郝伟林胡先才万汉平胡志华高洪雷张健吴儒杰唐伟军核工业北京地质研究院北京100029 中核集团地热勘查技术研究中心北京100029 西藏自治区土地矿权交易和资源储量评审中心西藏拉萨850011

地热尾水回灌是地热田开发过程中必不可少的环节,对热田开发具有重要意义。对世界上不同类型高温地热田回灌策略进行系统梳理,发现不同类型地热田常采取不同的回灌策略:气相为主的气液两相地热田常进行内场回灌;液相为主的气液两相地热... 详细信息

地热尾水回灌是地热田开发过程中必不可少的环节,对热田开发具有重要意义。对世界上不同类型高温地热田回灌策略进行系统梳理,发现不同类型地热田常采取不同的回灌策略:气相为主的气液两相地热田常进行内场回灌;液相为主的气液两相地热田和水热型地热田常采用内场回灌与外场回灌相结合的方式。重点分析与谷露地热田相似的美国Brady Hot Spring地热田、Beowawe地热田和中国羊易地热田三个水热型高温地热田在生产过程中的回灌情况,对上述地热田在回灌过程中的回灌距离、回灌深度及回灌后对热田生产的影响进行总结。上述地热田多采用同构造回灌的方式进行回灌;一般无特定的回灌距离,常采用内场回灌与外场回灌相结合的方式进行;回灌目的层常选择渗透性好的断裂构造;回灌深度以大于500 m的深层回灌为主。这些热田在回灌过程中,为了达到良好效果,需要平衡生产区的压力下降和热突破之间的关系。结合谷露地热田实际地质情况,认为谷露地热田应该采取同构造回灌,且采用内场回灌与外场回灌相结合的深层回灌方式。初步在热田生产区1.km以外的位置选择3片回灌区域。其中回灌1.是主要回灌区域,位于热田生产区的北侧约1.1.5 km范围内。为了防止发生热突破,需要在回灌井实施过程中,进行回灌试验,尽早确定回灌井与生产区之间的水力联系。

关键词：西藏高温地热田回灌经验谷露地热田回灌井

维普期刊数据库博看期刊

在线全文

学校读者我要写书评

暂无评论

西藏谷露地热田地热地质特征

地球科学 2023年第3期48卷 1014-1029页

作者：高洪雷胡志华万汉平郝伟林张松梁晓核工业北京地质研究院北京100029 中国地质大学地球科学与资源学院北京100083

西藏谷露地热田于2020年成功揭露到1.9.2℃的高温地热资源,研究谷露地热田地热地质特征,对西藏地热资源勘查开发和揭示高温地热系统成因机理都具有重要的科学与指导意义.本文以构造地质调查为基础,结合最新物探、钻探、水文资料,通过解... 详细信息

西藏谷露地热田于2020年成功揭露到1.9.2℃的高温地热资源,研究谷露地热田地热地质特征,对西藏地热资源勘查开发和揭示高温地热系统成因机理都具有重要的科学与指导意义.本文以构造地质调查为基础,结合最新物探、钻探、水文资料,通过解析构造-水-热循环系统内在联系,总结构造控热规律,并建立了谷露地热田地热系统概念模型.谷露地热田内主要发育N-S向(F1.F3)、E-W向(F2、F4)和NE向3组断裂.大气降水与冰山融水沿盆地西侧九子拉-桑雄断裂下渗,经深循环加热以盆地西缘F1.裂为导热通道向上运移,由于受到南北两侧F2、F4断裂的阻隔作用,热水在F1.F3断裂组成的“Y”字型断裂系统内汇聚集中,形成热储,并在地表沿NE向和N-S向断裂构成的通道系统中运移排泄;盆地基底花岗岩之上覆盖的泉胶砾岩层对热储起到了良好的隔水保温作用;热田内第四系沉积很薄,热储主要赋存于基岩裂隙中,为基岩裂隙型热储.F1.F3构成的“Y”字型断裂系统是热储赋存的主要场所,谷露地热田地热资源勘查开发要以这两条断裂为重点勘查目标.

关键词：谷露地热田地热发电概念模型基岩裂隙型热储

基于重磁场特征的洛宁地区构造特征研究及矿产预测

在线全文

学校读者我要写书评

暂无评论

物探与化探 2023年第3期47卷 608-617页

作者：张磊王万银汪孝博李文张雪丽宋豪杨敏安黎明河南省地质局矿产资源勘查中心河南郑州450053 长安大学重磁方法技术研究所陕西西安710054 长安大学地质工程与测绘学院陕西西安710054 海洋油气勘探国家工程研究中心北京100028

洛宁地区位于崤山隆起与洛宁盆地的结合处,属第四系浅覆盖区,已发现有老里湾、中河等大型银、铅、锌矿床,矿床形成与受断裂构造控制的酸性岩体关系密切。本文利用1.5万重、磁资料,采用最小曲率位场分离技术、归一化总水平导数垂向导数... 详细信息

洛宁地区位于崤山隆起与洛宁盆地的结合处,属第四系浅覆盖区,已发现有老里湾、中河等大型银、铅、锌矿床,矿床形成与受断裂构造控制的酸性岩体关系密切。本文利用1.5万重、磁资料,采用最小曲率位场分离技术、归一化总水平导数垂向导数技术、相关分析法、三维物性反演等方法进行处理,研究断裂构造及酸性岩体分布特征。通过研究表明:洛宁地区受NW向、NE向及EW向三期构造影响,以老里湾为中心,多组断裂呈现半径6.5 km的“环状”分布特征;发现多处隐伏岩体,重新厘定了老里湾岩体、中河岩体等边界,花岗岩体分布受环状构造控制,岩体埋深约3 km;“环状”构造与磁异常梯级带相关性较好的多处钻孔见矿,在该区开展找矿研究具有重要意义。

关键词：洛宁地区重磁异常隐伏岩体断裂矿产预测

Digital and global lithologic mapping of the Moon at a 1.2,500,000 scale

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2022年第20期67卷 2050-2054,M0003页

作者： Jian Chen Zongcheng Ling Jianzhong Liu Shengbo Chen Xiaozhong Ding Jianping Chen Weiming Cheng Bo Li Jiang zhang Lingzhi Sun Changqing Liu Haijun Cao Xiangyu Bi Li Liu Sheng {1. Xiaobin Qi Zixu Zhao Dijun Guo Jinzhu Ji Jingwen Liu Juntao {1.g Ke zhang Jingyi zhang Pengju Sun Kai Zhu Tianqi Lu Congzhe Wu Kunying Han Kejuan Xu Ming Jin Ying {1.g Cheng zhang Jiayin Deng Yang song Ziyuan Ouyang Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesSchool of Space Science and PhysicsShandong UniversityWeihai 264209China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China Center for Lunar and Planetary Science Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China College of Geoexploration Science and Technology Jilin UniversityChangchun 130000China institute of {1. Chinese Academy of Geological SciencesBeijing 100037China School of Earth sciences and Resources China University of GeosciencesBeijing 100083China institute of Geographic {1. and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Hawai’i institute of Geophysics and Planetology Department of Earth SciencesUniversity of Hawai’i at ManoaHonolulu HI 96826USA National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Mining Inner Mongolia University of TechnologyHohhot 010051China University of chinese {1. of sciencess Beijing 100049China

Scientific knowledge of lunar lithologies was first acquired in the *** space race between the United States(U.S.)and Soviet Union has promoted numerous manned and robotic lunar exploration *** datasets from these missions,the first series of lunar geologic maps was prepared and published by the *** Survey(USGS)The definition of lunar geological features in these maps was mostly based on morphological characteristics but lacked lithological constraints owing to the incompleteness of the compositional datasets *** two decades of silence,a new era of lunar exploration began in the 1.90s when the Galileo spacecraft flew by the Moon during its gravity-assisted *** very successful orbital missions,the Clementine and Lunar Prospector(LP),provided the first global geochemical and mineralogical(multispectral,gamma ray,neutron,etc.)datasets of the lunar surface.

关键词：美国地质勘探局物质成分编研地质综合研究月球表面数据资料 20世纪90年代以来分类体系

Mapping essential urban land use categories in china(EULUC-{1.):preliminary results for 201.

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2020年第3期65卷 182-187页

作者： Peng Gong Bin Chen Xuecao Li Han Liu Jie wang Yuqi Bai Jingming Chen Xi Chen Lei Fang Shuailong Feng Yongjiu Feng Yali Gong Hao Gu Huabing Huang Xiaochun Huang Hongzan Jiao Yingdong Kang Guangbin Lei Ainong Li Xiaoting Li Xun Li Yuechen Li Zhilin Li Zhongde Li Chong Liu Chunxia Liu Maochou Liu Shuguang Liu wanliu Mao Changhong Miao Hao Ni Qisheng Pan Shuhua Qi Zhehao Ren Zhuoran Shan Shaoqing Shen Minjun Shi Yimeng song Mo Su Hoi Ping Suen Bo Sun Fangdi Sun Jian Sun Lin Sun Wenyao Sun Tian Tian Xiaohua Tong Yihsing Tseng Ying Tu Hong wang Lan wang Xi wan Zongming wang Tinghai Wu Yaowen Xie Jian Yang Jun Yang Man Yuan Wenze Yue Hongda Zeng Kuo zhang Neng zhang Tao zhang Yu zhang Feng Zhao Yichen Zheng Qiming Zhou Nicholas Clinton Zhiliang Zhu Bing Xu Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua UniversityBeijing 100084China Tsinghua Urban institute Tsinghua UniversityBeijing 100084China Center for Healthy Cities Institute for China Sustainable UrbanizationTsinghua UniversityBeijing 100084China Department of Land Air and Water ResourcesUniversity of CaliforniaDavisCA 95616-8627USA Department of geological and Atmospheric {1. Iowa State UniversityAmesIA 50011USA State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital EarthChinese Academy of SciencesBeijing 100101China AI for Earth Laboratory Cross-Strait InstituteTsinghua UniversityBeijing 100084China International institute for Earth System {1. Nanjing UniversityNanjing 210093China Research Center for Ecology and Environment of Central Asia Chinese Academy of SciencesUrumchi 830011China Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China National Engineering Laboratory for Applied Technology in Forestry&Ecology in South china College of Life Science and TechnologyCentral South University of Forestry and TechnologyChangsha 410004China College of Surveying&Geo-Informatics Tongji UniversityShanghai 200092China Department of Urban Planning College of Architecture and Urban PlanningTongji UniversityShanghai 200092China beijing {1. of Urban Planning Beijing 100045China Department of Urban Planning School of Urban DesignWuhan UniversityWuhan 430072China College of Earth sciences Jilin UniversityChangchun 130061China Research Center for Digital Mountain and Remote Sensing Application Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China institute of Remote Sensing and Geographic Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of Urban and Regional Planning School of Geography and PlanningSun Yat-sen Univ

Land use reflects human activities on *** land use is the highest level human alteration on Earth,and it is rapidly changing due to population increase and *** areas have widespread effects on local hydrology,climate,biodiversity,and food production[1.2].However,maps,that contain knowledge on the distribution,pattern and composition of various land use types in urban areas,are limited to city *** mapping standard on data sources,methods,land use classification schemes varies from city to city,due to differences in financial input and skills of mapping *** address various national and global environmental challenges caused by urbanization,it is important to have urban land uses at the national and global scales that are derived from the same or consistent data sources with the same or compatible classification systems and mapping *** is because,only with urban land use maps produced with similar criteria,consistent environmental policies can be made,and action efforts can be compared and assessed for large scale environmental ***,despite of the fact that a number of urban-extent maps exist at global scales[3,4],more detailed urban land use maps do not exist at the same *** at big country or regional levels such as for the United States,china and European Union,consistent land use mapping efforts are rare[5,6](e.g.,https://***/open_land_use/).

关键词： EULUC-china 土地利用类型