检索结果-南通市图书馆

Acta Geologica Sinica(English Edition) 1999年第1期73卷 104-110页

作者： zhuang xinguo institute of sedimentary basin, faculty of earth resources china university of geosciences, wuhan, hubei 430074 china Univ Geosci Fac Earth Resources Inst Sedimentary Basin Wuhan 430074 Hubei Peoples R China

This paper discusses the characteristics of coal accumulation of transfor-extensional basins in linear fracture zones on the basis of an analysis of tectonic evolution and sequence stratigraphy in the Meihekou basin. Coal accumulation of the basin occurred mainly in the accelerated rifting period of the transtentional regime and in the late period of tectonic transformation of the transpressional regime. In the former period, swamps developed in shallow lakes. The thickness of coal seams was controlled by the activity of fault block. Thick coal was formed in a downfaulted trough. In the latter period, swamps developed in a braided fan delta plain. The coal seams are thin and have poor lateral continuity. The thickness of coal seams was controlled by the migration of water channels in the braided plain.

关键词： coal accumulation sequence stratigraphy tectonic evolution Meihekou basin

广西上林万福矿区晚二叠世合山组煤系锂地球化学特征及物源研究

在线全文

学校读者我要写书评

暂无评论

煤炭学报 2024年第9期49卷 3884-3895页

作者：张德高徐小涛孙杰张福强李宝庆张莉庄新国严晓云中国煤炭地质总局勘查研究总院北京100039 矿山透明地质与数字孪生技术国家矿山安监局重点实验室北京100039 中国煤炭地质总局广西煤炭地质局广西南宁530299 中国地质大学(武汉)资源学院湖北武汉430074

广西上林晚二叠世合山组含煤岩系中广泛存在锂元素富集的现象,具有潜在的经济价值和研究意义。本次研究以广西上林万福矿区晚二叠世合山组煤系锂矿化层为研究对象,在对34件样品常量元素和微量元素测试,并对1件样品锆石U–Pb测年和锆石... 详细信息

广西上林晚二叠世合山组含煤岩系中广泛存在锂元素富集的现象,具有潜在的经济价值和研究意义。本次研究以广西上林万福矿区晚二叠世合山组煤系锂矿化层为研究对象,在对34件样品常量元素和微量元素测试,并对1件样品锆石U–Pb测年和锆石微量元素测定的基础上,综合分析了区内合山组煤系锂矿化层的空间分布、元素地球化学特征和物质来源。研究发现,合山组煤系自下而上有Ⅰ、Ⅱ、Ⅲ和Ⅳ四套锂矿化层,锂质量分数由高到低依次为层Ⅰ、层Ⅲ、层Ⅱ和层Ⅳ。与世界黏土岩均值相比,层Ⅰ中Li元素属于高度富集,层Ⅱ、层Ⅲ中Li元素属于富集,而层Ⅳ中Li元素属于轻微富集;Al_(2)O_(3)–TiO_(2)、La/Sc–Th/Co和V–Ni–Th×10物源区岩性判别图解显示,层Ⅰ、层Ⅲ和层Ⅳ的大部分样品点落在酸性岩浆岩区附近,层Ⅰ中少数样品点落在中性岩浆岩区域,由此推断,万福矿区合山组煤系锂矿化层主要来自酸性和中性岩浆岩。通过对锆石U–Pb定年、锆石微量元素Th/Nb−Hf/Th和Th/U–Nb/Hf构造判别图、稀土元素分析以及Al_(2)O_(3)–TiO_(2)、La/Sc–Th/Co、V–Ni–Th×10和Nb/Y–Zr/TiO_(2)四个物源判别图的综合研究得出,万福矿区合山组煤系锂矿化层主要来自峨眉山大火成岩省和古特提斯二叠纪岩浆弧相关的中酸性岩浆岩。

关键词：煤系锂地球化学特征合山组万福矿区锆石U–Pb定年物源分析

Development background of Mesozoic high-quality source rocks: Evidence from microfossils in North Carnarvon basin, Australia

在线全文

学校读者我要写书评

暂无评论

Petroleum Research 2019年第1期4卷 71-83页

作者： Xing Niu Xianghua Yang Detian Yan xinguo zhuang Bo Wang Shenjun Huo Xiaoming Xu Key Laboratory of Tectonics and Petroleum resources of the Ministry of Education China University of Geosciences430074WuhanHubei ProvinceChina faculty of earth resources China University of Geosciences430074WuhanHubei ProvinceChina CNOOC Research institute Company Limited Beijing100028China

Based on numerous microfossils in Mesozoic of North Carnarvon basin in Australia,the Mesozoic paleoclimate and paleoenvironment were analyzed,the paleogeographic background and development model of Mesozoic high-quality source rocks were investigated and *** of microfossil species and their relative contents in Mesozoic different intervals indicates changes of paleoclimate and *** paleoclimate shows a cycle variation of aridehumidearidehumid,the regression occurred in the Early TriassiceLate Triassic and the transgression occurred in the Late TriassiceLate *** sedimentary facieses including delta facies,littoral facies,restricted sea facies and open sea facies were developed in the *** open sea was mainly developed in the Early Triassic,the delta was distributed in the MiddleeLate Triassic,the restricted sea was especially well developed in the Jurassic,and the restricted sea and open sea were mainly distributed in the *** of microfossil assemblage in these four sedimentary facies are dramatically *** the delta facies,littoral facies,restricted sea facies to open sea facies,content of pollen gradually decreases,but content of the dinoflagellate+acritarch gradually *** delta facies and littoral facies are dominated by the *** the restricted sea facies,content of the pollen is equivalent to that of the dinoflagellate+*** open sea facies is dominated by the dinoflagellate and *** of sediment and formation of organic matter are influenced by the paleoclimate and paleoenvironment,and type of organic matter is controlled by the microfossil *** on the palaeogeographic background,paleoclimatic condition and microfossil assemblage,two developmental models of the Mesozoic source rocks such as the development model of terrestrial organic matter under the background of large delta and the development model of mixed organic matter under the

关键词： Microfossil assemblage Sporopollen Dinoflagellate and acritarchs Paleoclimate reconstruction Evolution of sedimentary environment Development model of source rocks Mesozoic North Carnarvon basin

Syn-tectonic sedimentation and its linkage to fold-thrusting in the region of Zhangjiakou, North Hebei, china

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china earth Sciences 2018年第6期61卷 681-710页

作者： Shaofeng LIU Chengfa LIN Xiaobo LIU Qitian zhuang School of earth Sciences and resources China University of Geosciences (Beijing) institute of Geomechanics Chinese Academy of Geological Sciences

The timing of the "Yanshanian Movement" and the tectonic setting that controlled the Yanshan fold-and-thrust belt during Jurassic time in china are still matters of controversy. Sediments that filled the intramontane basins in the Yanshan belt perfectly record the history of "Yanshanian Movement" and the tectonic background of these basins. Recognizing syn-tectonic sedimentation, clarifying its relationship with structures, and accurately defining strata ages to build up a correct chronostratigraphic framework are the key points to further reveal the timing and kinematics of tectonic deformation in the Yanshan belt from the Jurassic to the Early Cretaceous. This paper applies both tectonic and sedimentary methods on the fold-and-thrust belt and intramontane basins in the Zhangjiakou area, which is located at the intersection between the western Yanshan and northern Taihangshan. Our work suggests that the pre-defined "Jurassic strata" should be re-dated and sub-divided into three strata units: a Late Triassic to Early Jurassic unit, a Middle Jurassic unit, and a Late Jurassic to early Early Cretaceous unit. Under the control of growth fold-and-thrust structures, five types of growth strata developed in different growth structures: fold-belt foredeep type,thrust-belt foredeep type, fault-propagation fold-thrust structure type, fault-bend fold-thrust structure type, and fault-bend foldthrust plus fault-propagation fold composite type. The reconstructed "source-to-sink" systems of Late Triassic to Early Jurassic,Middle Jurassic and Late Jurassic to early Early Cretaceous times, which are composed of a fold-and-thrust belt and flexure basins, imply that the "Yanshanian Movement" in our study area started in the Middle Jurassic. During Middle Jurassic to early Early Cretaceous times, there have been at least three stages of fold-thrust events that developed "Laramide-type" basementinvolved fold-thrust structures and small-scale intramontane broken "axial basins". The west

关键词： Yanshan-Taihangshan Fold-and-thrust belt Flexural basin Growth strata Source-to-sink system Thick-skinned fold-and-thrust belt

准噶尔盆地南缘芦草沟组页岩的沉积过程及有机质富集机理

在线全文

学校读者我要写书评

暂无评论

地球科学 2018年第2期43卷 538-550页

作者：张逊庄新国涂其军徐仕琪张娅中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 新疆维吾尔自治区地质调查院新疆乌鲁木齐830000

准噶尔盆地南缘二叠系芦草沟组页岩是重要的烃源岩和非常规油气资源储层,具有重大页岩油气勘探潜力.然而对准南芦草沟组页岩的沉积过程、古气候控制湖泊水文条件以及页岩中有机质的富集机理的研究相对较少.通过系统的野外地质调查和样... 详细信息

准噶尔盆地南缘二叠系芦草沟组页岩是重要的烃源岩和非常规油气资源储层,具有重大页岩油气勘探潜力.然而对准南芦草沟组页岩的沉积过程、古气候控制湖泊水文条件以及页岩中有机质的富集机理的研究相对较少.通过系统的野外地质调查和样品分析测试,主要利用沉积学定性分析和地球化学定量表征相结合的方法对芦草沟组页岩进行了综合研究.结果表明,研究区芦草沟组页岩主要沉积于盐度分层的半深湖-深湖环境;古气候在研究区湖盆流域具有独特的分带性,博格达东北部的古气候较温暖和潮湿,而博格达以西的古气候则相对干旱;博格达东北部较湿润的古气候引起该地区较充足的降雨,促进了湖水的盐度分层,同时降雨促进河流携带大量富营养元素的淡水注入湖泊引起了表层水体生产力升高,导致博格达东北部芦草沟组页岩相对于博格达西部地区具有更高的TOC含量;表层水体的古生产力与较稳定的贫氧-厌氧环境是研究区芦草沟组页岩有机质富集的主控因素.

关键词：准噶尔盆地芦草沟组页岩古气候有机质石油地质

Overlooked contribution of the biological pump to the Pacific Arctic nitrogen deficit

在线全文

学校读者我要写书评

暂无评论

Science china earth Sciences 2022年第8期65卷 1477-1489页

作者： Hongliang LI Jianfang CHEN Diana RUIZ-PINO Jingjing ZHANG Haiyan JIN Yanpei zhuang Youcheng BAI Jian REN Yangjie LI Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou310012China State Key Laboratory of Satellite Ocean Environment Dynamics Hangzhou310012China Sorbonne Universités(UPMC UniversitéParis 06)-CNRS-IRD-MNHNLOCEAN Laboratory4 Place JussieuParisF-75005France Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519080China Polar and Marine Research institute Jimei UniversityXiamen361021China

The nutrient-rich Pacific Ocean seawater that flows through the Bering Strait into the Chukchi Sea is generally considered to be the most important source of nutrients to the Arctic euphotic *** inflow is characterized by nitrogen deficit and low nitrate/phosphate(N/P)ratios;this is ascribed to sedimentary denitrification on the Chukchi shelf by preoccupant ***,the Chukchi Sea also has high primary production,which raises the question of whether the biological pump may also significantly modulate nutrient properties of the ***,we show that nitrate concentrations of the Pacific inflow gradually decrease northward in association with notable biological *** phytoplankton N/P uptake ratio was 8.8±2.27,higher than the N/P ratio of Pacific inflow water(5-6).This uptake ratio,in combination with efficient vertical nitrogen export,serves to preferentially remove nitrogen(relative to phosphorus)from upper waters,thereby further intensifying the Arctic nitrogen ***,as large as about 111.7×10^(9)mol N yr^(−1)of nitrate was extra consumed,according to the real N/P uptake ratio rather than the ratio of the Pacific inflow,which may be as great as half the nitrogen loss ascribed to sedimentary *** findings suggest that besides sedimentary denitrification,biological disproportionate utilization of nutrients in the Chukchi Sea upper water is another important contributor to the nitrogen limitation and excess phosphorus in the upper Arctic *** the rapid Arctic change era,the predicted reinforced biological carbon pump could further impact the nutrient dynamics and biogeochemical process of the Arctic Ocean.

关键词： Nitrogen deficit Biological pump Nutrient Sinking particles Arctic Ocean

塔里木盆地天山南地区古隆起周缘致密砂岩储层特征及主控因素

在线全文

学校读者我要写书评

暂无评论

地质科技通报 2024年第2期43卷 16-27页

作者：夏永涛王任杨红彩石万忠巴合提亚尔·艾尼瓦尔覃硕张晓徐壮中国石油化工股份有限公司西北油田分公司勘探开发研究院乌鲁木齐830011 中国地质大学(武汉)构造与油气资源教育部重点实验室武汉430074 中国地质大学(武汉)资源学院武汉430074 东华理工大学地球科学学院南昌330013

塔里木盆地天山南地区古隆起周缘砂岩储层发育的主控因素及致密化成因一直制约着该区的增储上产。综合利用薄片和阴极发光观察、物性测试、压汞分析等方法对下白垩统舒善河组-巴西盖组砂岩储层特征进行了研究,明确了制约储层物性发育的... 详细信息

塔里木盆地天山南地区古隆起周缘砂岩储层发育的主控因素及致密化成因一直制约着该区的增储上产。综合利用薄片和阴极发光观察、物性测试、压汞分析等方法对下白垩统舒善河组-巴西盖组砂岩储层特征进行了研究,明确了制约储层物性发育的主控因素。研究表明:研究区目的层的孔隙度φ多<10%,渗透率k<1×10^(-3)μm^(2),是典型的致密砂岩储层,其中辫状河三角洲相砂岩储层的物性和孔隙结构均最好(φ=12.3%,k=60.4×10^(-3)μm^(2)),扇三角洲相砂岩次之(φ=6.9%,k=1.9×10^(-3)μm^(2)),滩坝相砂岩最差(φ=6.7%,k=0.34×10^(-3)μm^(2));古隆起的演化控制了沉积相的差异,同时也影响了砂岩的成岩作用,辫状河三角洲和扇三角洲沉积环境水动力较强,砂岩颗粒较粗,受胶结作用弱,因此孔隙度和渗透率较高;滩坝相砂岩沉积时远离陆源输入,颗粒较细,水下古隆起的发育在成岩阶段控制了其较高含量的碳酸盐胶结物的形成,堵塞孔喉,显著降低砂岩储层物性,导致砂岩呈现致密化。研究成果可以为天山南地区下白垩统致密油气的勘探开发提供参考。

关键词：储层特征主控因素古隆起下白垩统塔北隆起致密砂岩储层

维普期刊数据库博看期刊

陕西典型矿区煤系关键金属元素富集特征及其成因机制

在线全文

学校读者我要写书评

暂无评论

煤炭学报 2022年第5期47卷 1808-1821页

作者：李晶王园袁伟庄新国李宝庆上官云飞杨光华潘磊中国地质大学(武汉)资源学院湖北武汉430074 内蒙古煤炭地质勘查(集团)有限责任公司内蒙古呼和浩特010010 西安地质矿产勘查开发院陕西西安710100

煤型关键金属矿床的研究现已成为国内外煤地质学和矿床学研究的重要内容,也是当前国际矿产地质界的前沿问题。陕西煤炭资源丰富,含煤岩系涵盖石炭—二叠系(太原组,山西组)、三叠系(瓦窑堡组)及侏罗系(延安组),不同煤田及不同时代煤层煤... 详细信息

煤型关键金属矿床的研究现已成为国内外煤地质学和矿床学研究的重要内容,也是当前国际矿产地质界的前沿问题。陕西煤炭资源丰富,含煤岩系涵盖石炭—二叠系(太原组,山西组)、三叠系(瓦窑堡组)及侏罗系(延安组),不同煤田及不同时代煤层煤质特征差异较大,部分地区煤中存在关键金属的富集。为了查明陕西煤系关键金属的富集分布特征及成因机制,选取主要煤田10个典型煤矿的含煤岩系为研究对象,系统开展煤的工业分析、全硫分析和微量元素地球化学测试。陕西煤中关键金属富集主要分布于石炭—二叠系煤系,在渭北及陕北石炭—二叠系煤系中普遍存在Li-Ga-Nb-Ta-REY关键金属组合的共富集。这些关键金属主要赋存于高岭石、勃姆石、磷酸盐等矿物中,且在靠近煤层夹矸及顶底板的煤系中更为富集。陕西石炭—二叠系煤中关键金属的富集与华北地台沉积基底及本溪组古风化壳密切相关,关键金属元素主要由盆地周缘蚀源区古风化壳黏土质和铝土质碎屑物质经水系搬运进入泥炭沼泽,通过有机质与无机质相互作用而富集;此外,也可能受同沉积火山灰输入及大地构造的部分影响。石炭—二叠系为陕西煤型关键金属矿产的富集层位,煤系Ga,Li,Nb,Ta等关键金属普遍达工业利用品位,REY在金华山煤矿太原组和桑树坪煤矿山西组煤系中也达工业利用品位,具有良好的勘查前景。其中,渭北石炭—二叠纪煤田和陕北石炭—二叠纪煤田府谷矿区可作为陕西煤型关键金属矿产勘探开发的首选靶区。

关键词：煤系关键金属陆源碎屑古风化壳火山灰石炭—二叠系

稀土-锆(铪)-铌(钽)-镓的活化、迁移和富集机理——以务正道地区上二叠统吴家坪组煤系为例

在线全文

学校读者我要写书评

暂无评论

煤炭学报 2022年第5期47卷 1822-1839页

作者：李宝庆庄新国宁树正李晶汪小妹黄少青杜红毅刘旭杨林键中国地质大学(武汉)构造与油气资源教育部重点实验室湖北武汉430074 中国煤炭地质总局勘查研究总院北京100038 贵州地矿局106地质大队贵州遵义563000

对务川—正安—道真(务正道)地区桥溪河矿区上二叠统吴家坪组底部煤系进行了系统的矿物学和地球化学测试和分析,以便查明煤系战略性金属的活化、迁移和富集过程,并评价其综合利用潜力。依据矿物组成和高岭石的结晶程度,自上而下确定了4... 详细信息

对务川—正安—道真(务正道)地区桥溪河矿区上二叠统吴家坪组底部煤系进行了系统的矿物学和地球化学测试和分析,以便查明煤系战略性金属的活化、迁移和富集过程,并评价其综合利用潜力。依据矿物组成和高岭石的结晶程度,自上而下确定了4个矿物组合层段(层A、层B、层C和层D)。层A(煤层顶板)的矿物主要由方解石、石英和伊利石组成;层B(煤层)由高岭石、黄铁矿、黄钾铁矾和伊/蒙混层组成;层C(直接底板黏土岩)由有序高岭石组成;层D(间接底板黏土岩)由无序高岭石组成。REY,Zr(Hf),Nb(Ta),Ga的质量分数由高到低依次是:层C+D>层B>层A。层A,B,C和D中的REY分别赋存于磷灰石、独居石、锆石+高岭石、高岭石+磷酸盐矿物中。层A,B中的Nb(Ta)和Zr(Hf)主要赋存于锆石和钛矿物中,层C,D中则主要赋存于锆石中。层A,B碎屑物质主要来源于峨眉山玄武岩和少量的碱性火山灰,层C黏土岩起源于过碱质中酸性火山灰的沉降和蚀变,层D黏土岩起源于碱性基性火山灰的沉降和蚀变。煤系剖面中REY,Zr(Hf)和Nb(Ta)的活化、迁移和富集受控于载体矿物的控制:①Zr(Hf)和Nb(Ta)主要赋存于耐蚀变性的锆石或钛矿物中,水/岩作用过程中Zr(Hf)和Nb(Ta)无明显的活化、迁移和分异,故它们的分布受控于火山灰性质(过碱质、中酸性火山灰)和输入量的控制;②REY主要来源于火山碎屑或峨眉山玄武岩,水/岩作用过程中容易解离出来而随溶液迁移和沉淀,引起REY质量分数和REY地化参数的不均匀分布。煤层(层B)和黏土岩(层C+D)可作为REY-Zr(Hf)-Nb(Ta)-Ga的潜在来源,可考虑综合勘探和利用。

关键词：战略性金属赋存状态富集机理煤系吴家坪组

Geochemical characteristics of REY, Li, Ga trace elements in the No. 9 coal seam of the Daheng mine, Ningwu coalfield, Shanxi Province, china

在线全文

学校读者我要写书评

暂无评论

china Geology 2021年第2期4卷 266-273页

作者： Jin-xi Wang Zhi-heng Fu Ya-fan Hu Zhen Yang Jia-liang Ma Yu-zhuang Sun Key Laboratory of Resource Exploration Research of Hebei Province Hebei University of EngineeringHandan 056038China School of resources and geosciences China University of Mining and TechnologyXuzhou 221116China institute for Atmospheric and Environmental Sciences Faculty of Geoscience and GeographyGoethe-University FrankfurtFrankfurt am Main 60438Germany

To understand the geochemical characteristics of the No.9 coal in the Daheng Mine of the Ningwu coalfield,the trace element analysis was conducted through X-ray fluorescence spectroscopy(XRF)and inductively coupled plasma mass spectrometry(ICP-MS).The sedimentary environment was discussed according to the element geochemical *** results show that Li,Ga,Hf,Zr,Nb,Th,and Ta are slightly enriched in the No.9 coal of Daheng *** average value of the rare earth elements and yttrium(ΣREY)in coal here is 144.20μg/g(excluding parting),which is higher than the average value ofΣREY in the world’s coal and china’s *** light rare earth elements(LREY)are *** content of Eu was 0.12‒2.10μg/g with an average of 0.57μg/g,and the Eu is obviously negatively *** of the trace elements in the coal are positively correlated with the ash content,which shows that the occurrence of these trace elements is related to inorganic *** results of sequential chemical extraction experiments show that rare earth elements mainly exist in coal in the form of *** value of the Sr/Ba and the content of S reflect that the coal-forming environment was influenced by *** values of V/Cr and Ni/Co reflect that the peat swamp is in an anaerobic environment and a strongly reducing environment during the coal-forming period.

关键词： Trace elements Rare earth elements Geochemistry Coal Taiyuan Formation Mineral exploration engineering Shanxi Province china