检索结果-南通市图书馆

geological characteristics,metallogenic regularity,and research progress of {1.thium deposits in{2.

在线全文

学校读者我要写书评

暂无评论

china {1. 2022年第4期5卷 734-767页

作者： Bo zhang Fan-yu {1. Xue-zheng Gao {2.-lei {3. Yun-tao Shang Zhao-yu Kong {3.-{1.ong Jia JieMeng Hui Guo Fu-kang fang Yan-bin {3.u {2. Jiang Hui Chai Zi {3.u Xian-tao Ye Guo-dong Wang Development and Research Center China Geological SurveyMinistry of Natural ResourcesBeijing 100037China School of Earth Sciences and resources China University of GeosciencesBeijing 100083China china Coal {1. Group Company {2.mited Beijing 100040China china Aero Geophysical Survey and Remote Sensing Center for Natural {1. Beijing 100083China china National {1. Exploration Center of Building Materials Industry Beijing 100035China Beijing institute of {1. for Mineral {2. Company {3.mited Beijing 100012China College of Oceanography Hohai UniversityNanjing 210098China School of resources and Environment Linyi UniversityLinyi 276005China

china is rich in abundant {1.thium {2. characterized by considerable reserves and a concentrated distribution of metallogenic zones or belts,with proven reserves of 4.4..8×1.^({4. t(calculated based on {1._(2.O)by... 详细信息

china is rich in abundant lithium {2. characterized by considerable reserves and a concentrated distribution of metallogenic zones or belts,with proven reserves of 4.4..8×10^(3. t(calculated based on li_(2.O)by *** is also a big consumer of *** 2.19,china’s lithium consumption in the battery sector alone had reached 99×10^(3. t,with an average annual growth rate of nearly 2.%.china has become the world’s largest importer of lithium {2.,showing a severely unbalanced relationship between supply and demand for lithium ***,there is an urgent need for the prospecting,exploitation,and study of lithium {2. in *** study collected,organized,and summarized the data on the major lithium deposits in china,analyzed and compared the spatial-temporal distribution patterns,geological characteristics,and metallogenic regularity of these lithium deposits,and summarized the prospecting and research achievements over the last *** major lithium deposits in china are distributed in provinces and regions such as qinghai,Jiangxi,Sichuan,Tibet,and *** deposits are mostly small in *** to different genetic types,this study divided lithium deposits into granitic pegmatite type,granite type,saline lake brine type,underground brine type,and sedimentary type,as well as new types including hot spring type and magmatic-hydrothermal type,and summarized the characteristics and key metallogenic factors of these different types of *** metallogenic prospect areas of lithium deposits were delineated according to the deposit types and the distribution patterns of metallogenic *** paper introduced the research progress in major metallogenic models and lithium extraction techniques made over the past *** on the comprehensive analysis of the prospecting potential of lithium deposits,the authors concluded that the future prospecting of lithium {2. in china should focus on lithium metallogenic

关键词： lithium deposit Deposit type Metallogenic age Metallogenic regularity Metallogenic belt Mineral exploration china

华夏造山系元古宙-早古生代洋板块地层分布与演化

在线全文

学校读者我要写书评

暂无评论

华南地质 2024年第2期40卷 181-210页

作者：张克信何卫红徐亚东王丽君牛志军邢光福王嘉轩徐德明赵希林宋芳寇晓虎中国地质大学(武汉)地质调查研究院湖北武汉430074 中国地质大学(武汉)地球科学学院湖北武汉430074 中国科学院新疆生态与地理研究所新疆乌鲁木齐830011 中国地质调查局武汉地质调查中心(中南地质科技创新中心) 湖北武汉430205 中国地质调查局南京地质调查中心江苏南京210016 江西师范大学地理与环境学院江西南昌330022

本文按洋板块地层理论与方法,系统收集和梳理了华夏造山系元古宙-早古生代与洋壳生成扩张和俯冲消亡遗存的洋壳残块和洋盆建造(称之为洋板块地层)共96处,均有测年和岩石地球化学分析数据控制,主要包括洋脊、洋岛和洋内弧3.洋壳的火成... 详细信息

本文按洋板块地层理论与方法,系统收集和梳理了华夏造山系元古宙-早古生代与洋壳生成扩张和俯冲消亡遗存的洋壳残块和洋盆建造(称之为洋板块地层)共96处,均有测年和岩石地球化学分析数据控制,主要包括洋脊、洋岛和洋内弧3.洋壳的火成岩建造,以及海山、远洋深海和海沟3.洋盆内的沉积建造。本文还对洋盆汇聚俯冲的直接产物-陆缘弧和叠加在裂离地块上的火山弧建造(非洋板块地层)系统收集梳理了85处,其中59处有测年和岩石地球化学分析数据控制,2.处无测年与地球化学分析,但有实测剖面控制。笔者对上述1.1.中的3.处进行了野外实地考察和相关样品采集与分析。在上述所获大量资料的基础上,本文主要以图解形式展示了华夏造山系元古宙-早古生代主要洋板块地层分布与构造演化历程。横向上将华夏造山系划分为江绍-郴州-钦防对接带(主要含陈蔡-龙游、神政桥-神山、鹰扬关和糯垌4.含蛇绿岩残块增生楔,以及绍兴-兰溪增生弧和钦防残余洋盆)、武夷-赣州多岛弧盆系(主要含罗霄弧、赣州弧间盆地、北武夷弧和南武夷弧以及南平-宁化构造混杂岩带)和东南沿海多岛弧盆系(主要含龙泉-政和-大埔、贵子-石窝2.含蛇绿岩残块增生楔,以及伴生的云开地块-弧、粤南弧-弧背盆地和东南沿海地块);纵向上据洋板块地层和相关火山弧时空分布,从老至新划分出华夏造山系(华南洋)的7个构造演化阶段:(1.约1.00~1.2}0 Ma,洋盆拉张形成期;(2.约1.2}0~82. Ma,洋盆扩张与汇聚转换期;(3.约82.~63. Ma洋盆汇聚俯冲、弧-弧和弧-陆增生峰期;(4.约63.~54.3}Ma洋盆汇聚与扩张转换期;(5)约54.3}4.8 Ma洋盆扩张期;(6)约4.8~4.3.Ma洋盆汇聚俯冲、弧-陆增生峰期;(7)约4.3.4.2} Ma洋盆关闭与陆-陆碰撞、残留洋(海)期。

关键词：洋板块地层洋壳残块火山弧元古宙早古生代华夏造山系

基于多元约束方法的2.2.年四川青白江M_(S)5.1.震构造研究

在线全文

学校读者我要写书评

暂无评论

地震地质 2022年第1期44卷 220-237页

作者：徐芳鲁人齐王帅江国焰龙锋王晓山苏鹏刘冠伸中国地震局地质研究所地震动力学国家重点实验室北京100029 南京工业大学测绘科学与技术学院南京211800 武汉大学测绘学院武汉430079 四川省地震局成都610041 河北省地震局石家庄050021

2.2.年2.3.,四川省成都市青白江区发生M_(S)5.{4.震,震中位于川西盆地的龙泉山断裂带北段。龙泉山断裂带北段存在东、西2.断层,2.断层与震中的距离相近。目前,此次地震的发震断层、地震成因与动力来源尚不清楚。文中尝试采用多元约... 详细信息

2.2.年2.3.,四川省成都市青白江区发生M_(S)5.{4.震,震中位于川西盆地的龙泉山断裂带北段。龙泉山断裂带北段存在东、西2.断层,2.断层与震中的距离相近。目前,此次地震的发震断层、地震成因与动力来源尚不清楚。文中尝试采用多元约束方法,将地球物理学、地震学、大地测量学理论和构造地质学与断层相关褶皱理论相结合,对青白江M_(S)5.{4.震进行了综合研究。地震反射剖面揭示了龙泉山背斜北段的基本构造特征,为发育在4.6km深度的中下三叠统膏盐滑脱层之上的逆冲断层和反冲断层的组合,且具有突破式断层传播褶皱特征;研究中采用CAP波形反演法得到了此次地震的震源矩心深度和震源机制解,其中震源矩心深度为5km,表明地震与浅层断层活动有关;震源机制解的节面Ⅰ为{4.°/3.0}/{4.0°,节面Ⅱ为{4.6°/59°/84.;通过Hyposat定位法和双差定位法对青白江地震序列进行重定位,得到主震的震中位置为(3..73.N,{4.4.4.°E),定位的6{4.余震主要集中分布于龙泉山断裂带北段东支附近,且具有较好的关联性,东支断层的产状与震源机制解节面Ⅰ一致,为倾向NW的低角度逆断层。研究提取了震中附近的InSAR同震形变场,同震形变量最大可达4.m;地震造成的形变在震中西北部为隆起,东南部为凹陷,且最大凹陷部位位于震中与龙泉山东支断裂之间,符合东支断裂逆冲的活动特征。文中通过多学科交叉的多元约束,对2.2.年青白江M_(S)5.{4.震的发震构造进行了详细分析,厘定了发震断层并探讨了可能的地震动力学背景,可为龙泉山地区的断层活动性分析和地震风险评估提供一定的科学依据。

关键词：青白江M_(S)5.1.震地震反射剖面地震重定位 InSAR同震形变龙泉山断裂带

干旱区典型湖泊CH_(4.扩散排放特征及其影响因素

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

环境科学学报 2022年第10期42卷 462-472页

作者：廖远珊肖启涛齐天赐张建平姚建斌李均力段洪涛西北大学城市与环境学院西安710127 中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室南京210008 巴州博斯腾湖科学研究所库尔勒841000 新疆地矿局第三地质大队巴州新矿测绘有限责任公司库尔勒841000 中国科学院新疆生态与地理研究所乌鲁木齐830011

湖泊等水体CH_(4.的排放是全球温室气体的主要组成部分,但目前对干旱区湖泊CH_(4.扩散排放特征及其影响因素的研究却鲜有报道.本文选取干旱区典型湖泊—博斯腾湖为研究对象,分别于2.2.年6月、9月、1.月采集水样,并测定其生物地球化学参... 详细信息

湖泊等水体CH_(4.的排放是全球温室气体的主要组成部分,但目前对干旱区湖泊CH_(4.扩散排放特征及其影响因素的研究却鲜有报道.本文选取干旱区典型湖泊—博斯腾湖为研究对象,分别于2.2.年6月、9月、1.月采集水样,并测定其生物地球化学参数及溶解CH_(4.浓度,确定其水-气界面CH_(4.扩散排放通量.结果表明,博斯腾湖CH_(4.扩散通量均值为(0.3.5±0.080)mmol·m^(-2.·d^(-1.,表现为大气CH_(4.的排放源;在空间上,受外源输送影响,入湖河口为CH_(4.的扩散排放热点区域;在不同月份,CH_(4.扩散通量变化受营养状态影响显著,与综合富营养化指数、叶绿素a浓度等呈显著正相关(富营养化指数:r=0.67,p1.叶绿素a:r=0.54.p1.,但其对温度的依赖性较低(p>0.05).另外,受外源输送、水动力特征、内部生物化学过程等影响,博斯腾湖CH_(4.扩散通量在不同湖区的控制因子表现出较大差异,其具体控制机制还需进一步明晰.

关键词：干旱湖泊博斯腾湖甲烷扩散通量时空变化影响因素

Feasibility and physics potential of detecting ^(8)B solar neutrinos at JUNO

在线全文

学校读者我要写书评

暂无评论

chinese Physics C 2021年第2期45卷 93-110页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Sebastiano Aiello Muhammad Akram Nawab Ali Fengpeng An Guangpeng An {1. An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Andrej Babic Wander Baldini Andrea Barresi Eric Baussan Marco Bellato Antonio Bergnoli Enrico Bernieri David Biare Thilo Birkenfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Max Buesken Mario Buscemi Jose Busto Ilya Butorov Anatael Cabrera Hao Cai xiao Cai Yanke Cai Zhiyan Cai Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Jinfan Chang Yun Chang Pingping Chen Po-An Chen Shaomin Chen Shenjian Chen Xurong Chen Yi-Wen Chen Yixue Chen Yu Chen zhang Chen Jie Cheng Yaping Cheng Alexander Chepurnov Davide Chiesa Pietro Chimenti Artem Chukanov Anna Chuvashova Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Salvatore Costa Flavio Dal Corso Christophe De La Taille Jiawei Deng Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Georgy Donchenko Jianmeng Dong Damien Dornic Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Lukas Fajt Donghua Fan Lei Fan Can fang Jian fang Marco Fargetta Anna Fatkina Dmitry Fedoseev Vladko Fekete li-Cheng Feng {1.chun Feng Richard Ford Andrey Formozov Amélie Fournier Haonan Gan Feng Gao Alberto Garfagnini Alexandre Göttel Christoph Genster Marco Giammarchi Agnese Giaz Nunzio Giudice Franco Giuliani Maxim Gonchar Guanghua Gong Hui Gong Oleg Gorchakov Yuri Gornushkin Marco Grassi Christian Grewing Maxim Gromov Vasily Gromov Minghao Gu xiaofei Gu Yu Gu Mengyun Guan Nunzio Guardone Maria Gul Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yan Yerevan Physics institute YerevanArmenia Universitélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro RioBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina china {1. of Atomic Energy BeijingChina institute of High Energy Physics BeijingChina North china Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin institute of Technology HarbinChina University of Science and Technology of china HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South china HengyangChina Wuyi University JiangmenChina Shandong University JinanChina institute of Modern Physics Chinese Academy of SciencesLanzhouChina nanjing University NanjingChina Guangxi University NanningChina East china University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee institute Shanghai Jiao Tong UniversityShanghaiChina institute of Hydro{1. and Environmental {1. Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi’an Jiaotong University Xi’anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina institute of Physics National Chiao-Tung University Hsinchu National United University Miao-Li Department of Physics National T

The Jiangmen Underground Neutrino Observatory(JUNO)features a 2. kt multi-purpose underground {1.quid scintillator sphere as its main *** of JUNO's features make it an excellent location for^8B solar neutrino measurements,such as its low-energy threshold,high energy resolution compared with water Cherenkov detectors,and much larger target mass compared with previous {1.quid scintillator *** this paper,we present a comprehensive assessment of JUNO's potential for detecting^8B solar neutrinos via the neutrino-electron elastic scattering process.A reduced 2.MeV threshold for the recoil electron energy is found to be achievable,assuming that the intrinsic radioactive background^(2.8)U and^(2.2.Th in the {1.quid scintillator can be controlled to 1.^(-1.)g/*** ten years of data acquisition,approximately 60,000 signal and 3.,000 background events are *** large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter,which will shed new {1.ght on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation *** m^(2._(2.)=4.8times1.^(-5);(7.5times1.^(-5))eV^(2.,JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3.igma(2.igma)level by measuring the non-zero signal rate variation with respect to the solar zenith ***,JUNO can simultaneously measureDelta m^2.(2.)using^8B solar neutrinos to a precision of 2.% or better,depending on the central value,and to sub-percent precision using reactor antineutrinos.A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m^2.(2.)reported by solar neutrino experiments and the KamLAND experiment.

关键词： neutrino oscillation solar neutrino JUNO

Sub-percent precision measurement of neutrino oscillation parameters with JUNO

在线全文

学校读者我要写书评

暂无评论

chinese Physics C 2022年第12期46卷 28-49页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Muhammad Akram Abid Aleem Fengpeng An qi An Giuseppe Andronico Nikolay Anfimov Vito Antonel{1. Tatiana Antoshkina Burin Asavapibhop João Pedro Athayde Marcondes de André Didier Auguste Weidong Bai Nikita Balashov Wander Baldini Andrea Barresi Davide Basi{1.co Eric Baussan Marco Bellato Antonio Bergno{1. Thilo Birkenfeld Sylvie B{1.n David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongrand Clément Bordereau Dominique Breton Augusto Brigatti Riccardo Brugnera Riccardo Bruno Antonio Budano Jose Busto Ilya Butorov Anatael Cabrera Barbara Caccianiga Hao Cai xiao Cai Yanke Cai Zhiyan Cai Riccardo Callegari Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Chi Chan Jinfan Chang Yun Chang Guoming Chen Pingping Chen Po-An Chen Shaomin Chen Xurong Chen Yixue Chen Yu Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng Yu Chin Cheng Alexey Chetverikov Davide Chiesa Pietro Chimenti Artem Chukanov Gérard Claverie Catia Clementi Barbara Clerbaux Selma Conforti Di Lorenzo Daniele Corti Flavio Dal Corso O{1.via Dalager Christophe De La Taille Zhi Deng Ziyan Deng Wilfried Depnering Marco Diaz Xuefeng Ding Yayun Ding Bayu Dirgantara Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong Evgeny Doroshkevich Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Stefano Dusini Martin Dvorak Timo Enqvist Heike Enzmann Andrea Fabbri Donghua Fan Lei Fan Jian fang Wenxing fang Marco Fargetta Dmitry Fedoseev Zhengyong Fei {1.-Cheng Feng qichun Feng Richard Ford Amé{1.e Fournier Haonan Gan Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Alexandre Göttel Marco Grassi Vasily Gromov Minghao Gu xiaofei Gu Yu Gu Mengyun Guan Yuduo Guan Nunzio Guardone Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher Caren Hagner Ran Han Yang Han Miao He Wei He Tobias Heinz Patrick Hellmuth Yuekun Heng Rafael Herrera YuenKeung Ho Yerevan Physics institute YerevanArmenia Universiélibre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Pontificia Universidad Católica de Chile SantiagoChile Universidad Tecnica Federico Santa Maria ValparaisoChile Beijing institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina china {1. of Atomic Energy BeijingChina institute of High Energy Physics BeijingChina North china Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-Sen University GuangzhouChina Harbin institute of Technology HarbinChina University of Science and Technology of china HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South china HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina institute of Modern Physics Chinese Academy of SciencesLanzhouChina nanjing University NanjingChina Guangxi University NanningChina East china University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee institute Shanghai Jiao Tong UniversityShanghaiChina institute of Hydro{1. and Environmental {1. Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhou

JUNO is a multi-purpose neutrino observatory under construction in the south of *** publication presents new sensitivity estimates for the measurement of the △m_({1.)^(2.,△m_(2.)^(2.,sin^(2.θ_(1.2},and sin^(2.θ_(1.1. oscillation parameters using reactor antineutrinos,which is one of the primary physics goals of the *** sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site,the nuclear reactors in the surrounding area and beyond,the detector response uncertainties,and the reactor antineutrino spectral shape constraints expected from the TAO satellite *** is found that the △m_(2.)^(2. and sin^(2.θ_(1.2} oscillation parameters will be determined to 0.5%precision or better in six years of data *** the same period,the △m_({1.)^(2. parameter will be determined to about 0.2.precision for each mass ordering *** new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters.

关键词： neutrino oscillation reactor antineutrino precision measurement JUNO

川东南五峰组-龙马溪组页岩气目标评价及水平井设计技术

在线全文

学校读者我要写书评

暂无评论

科学技术与工程 2023年第3期23卷 1024-1032页

作者：张培先何希鹏高玉巧刘明周頔娜高全芳蔡潇张勇中国石油化工股份有限公司华东油气分公司南京210019

川东南地区五峰组-龙马溪组具有良好的页岩气勘探开发潜力,利用实验、地震、测井、钻井及压裂等资料,以页岩气甜点目标评价为主线,开展地质-物探、地质-工程一体化研究,结合勘探开发实践,明确了地质综合评价、甜点目标评价体系及水平井... 详细信息

川东南地区五峰组-龙马溪组具有良好的页岩气勘探开发潜力,利用实验、地震、测井、钻井及压裂等资料,以页岩气甜点目标评价为主线,开展地质-物探、地质-工程一体化研究,结合勘探开发实践,明确了地质综合评价、甜点目标评价体系及水平井地质-工程一体化设计等目标评价技术系列。甜点目标评价体系是以“三因素控气”地质认识为指导,建立甜点目标评价体系和标准,优选有利目标。水平井地质-工程一体化设计技术是通过优化水平井部署和压裂设计,穿好层、压好缝,提高单井产量。通过目标评价技术集成及应用,形成固定做法、固化成熟技术,高效指导川东南地区五峰组-龙马溪组页岩气勘探开发。

关键词：页岩气五峰组-龙马溪组目标评价技术水平井设计技术川东南

地质高背景地区土壤中不同粒径铁锰结核地球化学特征

在线全文

学校读者我要写书评

暂无评论

生态学杂志 2021年第8期40卷 2289-2301页

作者：季文兵杨忠芳尹爱经芦园园应蓉蓉杨琼刘旭李博段轶仁王珏王懿铮余涛吴天生张起钻生态环境部南京环境科学研究所南京210042 国家环境保护土壤管理与污染控制重点实验室南京210042 中国地质大学(北京)地球科学与资源学院北京100083 中国地质大学(北京)数理学院北京100083 广西壮族自治区地质调查院南宁530023 广西壮族自治区地质矿产勘查开发局南宁530023

研究地质高背景地区土壤中不同粒径铁锰结核地球化学特征,有助于厘清岩溶地区土壤中铁锰结核对重金属异常富集的影响及对重金属吸附固定的主控因素。本研究以广西南宁市和崇左市大新县表层土壤大样(0~2. cm)为对象,筛分出不同粒径的铁... 详细信息

研究地质高背景地区土壤中不同粒径铁锰结核地球化学特征,有助于厘清岩溶地区土壤中铁锰结核对重金属异常富集的影响及对重金属吸附固定的主控因素。本研究以广西南宁市和崇左市大新县表层土壤大样(0~2. cm)为对象,筛分出不同粒径的铁锰结核(0.{1.0.5、0.5~1.1.2.2.4.4.6、6~8、>8 mm)和对应土壤(2.mm)样品进行化学分析,研究不同粒径铁结核和锰结核重金属元素变化和主控因素以及重金属(Cd、Cr、Cu、Ni、Pb、Zn)在铁锰结核和对应土壤中的分布分配规律。结果显示:铁结核和锰结核中,随着粒径变化,Fe2.{1.Cr元素显示同步变化趋势,而Mn O2.Cd、Cu、Ni、Pb、Zn等重金属变化趋势同步,重金属元素随粒径变化特点反映了铁锰结核形成及生长过程中铁元素控制着Cr元素的地球化学行为,而锰元素控制着Cd、Cu、Ni、Pb、Zn元素的地球化学行为。通过计算土壤中铁锰结核重金属元素含量的贡献比例,在铁结核中平均贡献比例为Cr(4..76%)>Cd(2..91.)>Pb(1..4.%)>Cu(1..2.%)>Zn(1..77%)>Ni(1..4.1}),而在锰结核中平均贡献比例为Cr(4..2.%)>Cd({1..94.)>Pb(2..86%)>Cu(1..59%)>Zn(1.1.79%)>Ni(1.0}1.%),说明岩溶区土壤中大部分重金属实际是被固定在铁锰结核中,且生物活性很低。因此,对高地质背景区土壤进行生态风险评价时,应扣除固定在铁锰结核中的重金属,这样才更科学更精确。

关键词：岩溶区铁结核锰结核地球化学行为重金属元素

在线全文

学校读者我要写书评

暂无评论

中国现代花粉数据集

植物生态学报 2021年第7期45卷 799-808页

作者：陈海燕徐德宇廖梦娜李凯倪健曹现勇程波郝秀东孔昭宸李升峰李小强刘光琇刘平妹刘兴起孙湘君唐领余魏海成许清海阎顺羊向东杨振京于革张芸张志勇赵克良郑卓 Ulrike HERZSCHUH 浙江师范大学化学与生命科学学院浙江金华321004 浙江金华山亚热带森林生态系统野外科学观测研究站浙江金华321004 中国科学院青藏高原研究所青藏高原地球系统科学国家重点实验室北京100101 华中师范大学城市与环境科学学院武汉430079 南宁师范大学北部湾环境演变与资源利用教育部重点实验室南宁530001 中国科学院植物研究所北京100093 南京大学地理与海洋科学学院南京210023 中国科学院古脊椎动物与古人类研究所北京100044 中国科学院西北生态环境资源研究院兰州730000 台湾大学地质科学系中国台北106171 首都师范大学资源环境与旅游学院北京100048 同济大学海洋与地球科学学院上海200092 中国科学院南京地质古生物研究所南京210008 中国科学院青海盐湖研究所西宁810008 河北师范大学资源与环境科学学院石家庄050027 中国科学院新疆生态与地理研究所乌鲁木齐830011 中国科学院南京地理与湖泊研究所南京210008 中国地质科学院水文地质与环境地质研究所石家庄050061 中国科学院庐山植物园江西九江332900 中山大学地球科学与工程学院广州510275 Alfred Wegener institute Helmholtz Centre for Polar and Marine Research Potsdam 14473Germany

孢粉是重建古植被、古气候的重要基础数据。孢粉数据库对研究样点至区域和全球尺度上的古环境演变规律、古气候变化特征反演和古生物地球化学循环模拟等具有重要意义。该文收集整理了中国1.60–2.2.年间发表和部分未发表的现代花粉数据... 详细信息

孢粉是重建古植被、古气候的重要基础数据。孢粉数据库对研究样点至区域和全球尺度上的古环境演变规律、古气候变化特征反演和古生物地球化学循环模拟等具有重要意义。该文收集整理了中国1.60–2.2.年间发表和部分未发表的现代花粉数据记录,包括样品编号、采样位置、采样地经纬度和海拔高度、样品类型、数据来源、数据类型、周边植被信息、参考文献、花粉类群及其含量等信息;并对数据进行筛选和标准化等处理,由此整合为中国现代花粉数据集。该数据集由4.4.7个现代花粉采样点的数据信息组成,包括660个来自中国第四纪孢粉数据库数据,1.76{4.前期整理发表的数据和2.074.近期收集的数据,涵盖772.花粉类群。样品类型以土壤表层样品({4.{4.2.)为主,苔藓样品以及湖泊、海洋表层样品等为辅,广泛分布于全国不同地理区域和植被类型中,其中以温带荒漠区域(2..91.)和亚热带常绿阔叶林区域(2..02.)最丰富,其次为温带草原区域(1..1.%)和青藏高原高寒植被区域(1..8{4.)。数据按照来源可分为原始数据(58%)和数值化数据(4.1});按照数据类型可分为原始统计粒数的样点(59%)和以花粉百分比表达的样点(4.0})。半个多世纪以来,科研人员开展了大量的表层现代花粉取样和研究。本数据集虽然仅获取部分记录,但样点覆盖了我国绝大多数地区,可有效地用于古植被与古气候重建的现代孢粉与现代植被校验,并将为中国孢粉数据库的建立与更深入的孢粉研究提供数据支撑。

关键词：中国花粉数据库表层花粉现代植被