检索结果-南通市图书馆

阿尔金西段库木塔什萤石矿床成因:磷灰石U-Pb年龄、原位Sr-Nd同位素、地球化学约束

在线全文

学校读者我要写书评

暂无评论

西北地质 2024年第4期57卷 1-20,I0002页

作者：高永宝陈康王亮赵辛敏李艳广刘明张龙王元伟张毅刘基中国地质调查局金矿勘查技术创新中心陕西西安710100 中国地质调查局西安矿产资源调查中心陕西西安710100 西北大学地质学系大陆动力学国家重点实验室陕西西安710069 中国地质调查局西安地质调查中心陕西西安710119 长安大学地球科学与资源学院陕西西安710054

近年来,阿尔金西段取得萤石找矿重大突破,相继发现卡尔恰尔和库木塔什等矿床,但成矿时代和成矿机制研究薄弱。笔者选取库木塔什矿床与萤石密切共生磷灰石为研究对象,开展原位U-Pb定年、Sr-Nd同位素及地球化学分析,以探讨萤石矿成矿时代... 详细信息

近年来,阿尔金西段取得萤石找矿重大突破,相继发现卡尔恰尔和库木塔什等矿床,但成矿时代和成矿机制研究薄弱。笔者选取库木塔什矿床与萤石密切共生磷灰石为研究对象,开展原位U-Pb定年、Sr-Nd同位素及地球化学分析,以探讨萤石矿成矿时代及矿床成因。磷灰石常呈自形-半自形结构,表面均匀,单偏光下近乎透明,主要与萤石、方解石、带云母、氟碳铈矿等矿物共生。结果显示,磷灰石U-Pb同位素年龄为(448±27)Ma,成矿作用与碱长花岗岩侵入活动密切相关,均为晚奥陶世构造-岩浆活动产物。磷灰石中F含量为4.20%~5.12%,Cl含量小于0.02%,极低的Cl含量表明出溶的流体Cl含量较低。磷灰石稀土元素含量较高(908×10^(-6)~2164×10^(-6)),稀土配分曲线显示强烈Eu负异常和Ce正异常,且与萤石、方解石、碱长花岗岩有明显的一致性,推测与岩浆-热液阶段大量流体出溶密切相关。磷灰石的^(87)Sr/^(86)Sr值为0.70913~0.71047,^(143)Nd/^(144)Nd值为0.51138~0.51153,εNd(t)值为-13.3~-10.3,表明成矿物质具有壳幔混合特征。综合研究表明,阿尔金西段萤石成矿时代为奥陶纪,与同期碱长花岗岩密切相关,形成于后碰撞伸展阶段,成矿流体来源于碱长花岗岩的熔体-流体演化,为岩浆热液充填型矿床。

关键词：地球化学特征磷灰石萤石矿床库木塔什阿尔金西段

Genesis of the Shijia Gold Deposit， Jiaodong Peninsula， china. Constraints from Fluid Inclusions and Stable Isotopes

在线全文

学校读者我要写书评

暂无评论

Journal of earth Science 2024年

作者： Liqiang Feng Ruiwen Shen xuexiang Gu Yongmei zhang Zhanlin Ge Yingshuai zhang Yu He Natural resources Comprehensive survey Command center china geological survey Ha'erbin Natural resources survey Command center china geological survey School of earth sciences and resources， china university of geosciences state key laboratory of geological processes and mineral resources， china university of geosciences Beijing xi'an mineral resources survey center china geological survey Department of Natural resources of Liangshan Yi Autonomous Prefecture

The Shijia gold deposit， situated in Penglai City， Shandong Province， is distinguished by its fracture-filling auriferous quartz-sulfide veins. Studies of fluid inclusions and stable isotopes （H-O-C-S） were conducted on this deposit， revealing that the auriferous quartz primarily contains four types of fluid inclusions: CO2-H2O inclusions， pure CO2inclusions， two-phase aqueous inclusions， and solid mineral-bearing multiphase inclusions. The ore-forming fluids of Shijia belong to a heterogeneous H2O-CO2-NaCl system， characterized by moderate to high temperatures （187–386 ℃）， low to high salinities (0.2%–41.2% NaCleq)， and low densities (0.72–1.07 g/cm3). Fluid immiscibility and fluid-rock interaction may have occurred at Shijia， with mineralization depths ranging from 3.3 to 3.9 km. The δD and δ18OH2Ovalues of auriferous quartz vary from -86.1‰ to -79.1‰ and from 9.4‰ to 10.5‰， respectively， suggesting that the ore-forming fluids are of magmatic origin. Carbon isotope compositions of the hydrothermal calcite （-3.31‰ to -0.86‰） indicate the carbon might be related to a mantle source that was contaminated by marine carbonates. The positive δ34S values of sulfides （4.3‰–7.3‰） reflect that the ore-forming materials may be sourced from the metasomatized lithospheric mantle beneath the North china.Craton， related to the subduction of the Yangtze Craton in the Triassic. Collectively， the evidence from geology， fluid inclusion and H-O-C-S isotopes indicate that the Shijia gold deposit is of magmatic-hydrothermal origin and related to the Guojialing granite formed by the mixing of crust- and mantle-derived magmas.

关键词：

甘肃滴水山金矿不同构造-岩相带岩石地球化学特征及构造控矿机理探讨

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

西北地质 2018年第1期51卷 88-103页

作者：杨永春刘家军王学银陈杰薛小文张聪任锡中国地质大学地质过程与矿产资源国家重点实验室北京100083 甘肃省地质矿产勘查开发局第四地质矿产勘查院甘肃酒泉735000

滴水山金矿床位于北祁连加里东褶皱带的西段,分布于北西西向剪切带内,通过野外实地观察和镜下鉴定、样品测试,对该剪切带内Au2矿体构造-岩相特征及其地球化学元素变化特征进行了研究,结果表明:(1)该剪切带存在2期变形,早期为由北向南斜... 详细信息

滴水山金矿床位于北祁连加里东褶皱带的西段,分布于北西西向剪切带内,通过野外实地观察和镜下鉴定、样品测试,对该剪切带内Au2矿体构造-岩相特征及其地球化学元素变化特征进行了研究,结果表明:(1)该剪切带存在2期变形,早期为由北向南斜冲的韧-脆性剪切变形,晚期为斜向下滑的脆性变形。(2)根据元素分析结果,Au元素含量从安山质晶屑凝灰岩带→糜棱岩化安山质晶屑凝灰岩带→蚀变碎裂岩带→金矿化蚀变碎裂岩带逐步增高。根据相关性分析,Au与Ag相关性最好,其次为Pb、Mo,与As、Hg相关性一般。研究认为,滴水山金矿床北西西向剪切带早期韧-脆性变形有利于成矿元素的活化迁移,为Au元素的运移和初步富集提供了通道,晚期脆性变形主要形成各种张裂隙和构造破碎带,由于构造体制发生转换,导致Au元素的再次富集形成金矿体。

关键词：滴水山金矿剪切带构造-岩相带主微量元素构造体制转换

中天山地块南缘两类混合岩的成因及其地质意义

在线全文

学校读者我要写书评

暂无评论

岩石学报 2019年第10期35卷 3233-3261页

作者：王信水江拓高俊高强李继磊张喜中国科学院地质与地球物理研究所矿产资源院重点实验室北京100029 地质过程与矿产资源国家重点实验室中国地质大学地球科学学院武汉430074 中国地质调查局武汉地质调查中心同位素地球化学研究室武汉430205 中国地质环境监测院北京100081 中国五矿集团北京100010

中天山地块是位于中亚造山带西南缘的西天山造山带的重要组成块体,其基底演化和构造亲缘性对恢复西天山的增生造山方式和大地构造格局具有重要意义。混合岩在中天山地块的高级变质地体中广泛分布,是揭示中天山地块基底演化和构造属性的... 详细信息

中天山地块是位于中亚造山带西南缘的西天山造山带的重要组成块体,其基底演化和构造亲缘性对恢复西天山的增生造山方式和大地构造格局具有重要意义。混合岩在中天山地块的高级变质地体中广泛分布,是揭示中天山地块基底演化和构造属性的窗口。本文通过开展锆石U-Pb年代学和Hf同位素及岩石地球化学研究,确定了中天山地块南缘乌瓦门杂岩的两类条带状混合岩的原岩性质和形成时代以及混合岩化作用时代和成因机制。第一类条带状混合岩的原岩为中基性岩屑砂岩,混合岩化时代为~1. 8Ga,是在同期角闪岩相变质过程中通过变质分异形成的。第二类条带状混合岩的古成体包括黑云角闪斜长片麻岩和黑云斜长角闪片麻岩,原岩均形成于~2. 5Ga,并叠加~1. 8Ga角闪岩相变质作用,是洋陆俯冲背景下由俯冲洋壳或岩石圈地幔部分熔融形成。侵入古成体的变基性岩墙形成于~1. 72Ga,具有Fe-Ti玄武岩的地球化学特征,起源于后碰撞伸展背景下的软流圈地幔。该类混合岩的浅色体同时穿插古成体和变基性岩墙,呈现突变的野外接触关系,与区域内约787~785Ma混合岩化同期,即混合岩化作用是外来岩浆注入的结果,可能是造山带垮塌引发地壳深熔作用的产物。乌瓦门杂岩记录的~2. 5Ga岩浆活动、~1. 8Ga变质作用和~790Ma混合岩化作用可以和塔里木北缘进行对比,暗示中天山地块是一个具有确切新太古代-古元古代结晶基底的微陆块,并且和塔里木克拉通存在构造亲缘性。

关键词：混合岩中天山地块天山造山带中亚造山带

Petrogenesis and tectonic significance of the early Paleozoic Delenuoer ophiolite in the Central Qilian Shan, northeastern Tibetan Plateau

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2020年第6期11卷 2017-2029页

作者： Zhen Ma Jinrong Wang Liangliang zhang Yixin Liu Yunyun gao xiang zhang Sheng Yu Cheng zhang key laboratory of mineral resources in Western china School of Earth SciencesLanzhou UniversityLanzhou730000China state key laboratory of geological processes and mineral resources School of Earth Sciences and ResourcesChina University of Geosciences(Beijing)Beijing100083China Changqing Branch Research Institute of Bureau of Geophysical ProspectingChina National Petroleum CorporationXi’an710021China geological survey of Gansu Province Lanzhou730000China No.2 Geology and mineral Exploration Team Gansu Provincial Bureau of Geology and Mineral Exploration and DevelopmentLanzhou730000China

The newly discovered early Paleozoic Delenuoer ophiolite,in the western margin of the Central Qilian Shan,is composed of serpentinized peridotite,cumulate gabbro,diabase,massive basalt,and pillow *** study presents geochronological and geochemical data for the cumulate gabbro and ***-ICP-MS U-Pb dating of zircons from the cumulate gabbro yielded a magmatic crystallization age of 472±4 *** basalts have normal mid-ocean ridge basalt(N-MORB)compositions and a narrow range ofεNd(t)values(+4.5 to+5.3),which indicates they were derived from a depleted mantle *** the basis of regional geological constraints,it is proposed that the Delenuoer ophiolite is a westward extension of the South Ophiolite Belt(Yushigou-Youhulugou-Donggou-Dongcaohe Ophiolite Belt)in the North Qilian *** Delenuoer ophiolite,along with the Gulangxia-Delenuoer fault,defines the westernmost part of the tectonic boundary between the North and Central Qilian *** ophiolite may have formed during southward subduction of the Qilian Ocean slab during the early Paleozoic.

关键词： Ophiolite Delenuoer Central Qilian Shan Early Paleozoic Tectonic boundary

Geochronological and geochemical constraints on the granitic gneiss in the Huozhou Complex: implications for the tectonic evolution of the Trans-North china.Orogen

在线全文

学校读者我要写书评

暂无评论

Acta Geochimica 2023年第1期42卷 153-181页

作者： Chong Peng Haiyan Liu Ruiying zhang Cremilda Samuel Jofrisse Linfu xue Baozhi Pan College of Geographical sciences Shanxi Normal UniversityTaiyuan 030031China key laboratory of Deep-earth Dynamics of Ministry of Natural resources Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China state key laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China College of earth sciences Jilin UniversityChangchun 130061China School of geosciences University of EdinburghEdinburgh EH93JWUK

The Trans-North china.Orogen is a major Neoarchean Paleoproterozoic collisional orogenic belt above the North china.Craton, formed due to prolonged and complex processes. Even though many NeoarcheanPaleoproterozoic magmatic and metamorphic activities have been reported, due to the Huozhou Complex’s small outcropping range, little attention has been paid to the origin of various igneous rocks of the Huozhou Complex in the center of the Trans-North china.Orogen. The Huozhou Complex, located south of the Luè liang, Wutai, and Hengshan complexes, is an important window into the Early Precambrian structure and evolution of the North china.Craton. Its magma and metamorphism are crucial to understanding the development of the structural evolution of the Trans-North china.Orogen. The Huozhou metamorphic complex area exposes a range of Precambrian metamorphic rocks, among which the most extensively dispersed is felsic biotite plagioclase gneiss. In this study comprehensive geological field survey, micropetrology,chronology, geochemistry, and Hf isotope analysis were carried out for the Qinggangping and Anziping gneiss in the north of the Huozhou Complex. The results show that the magmatic zircon age of the Qinggangping gneiss is2196 ± 14 Ma, and its protolith is I-type granite, formed by partial melting of igneous rocks in the absence of weathering. Its source is mainly the juvenile crust from depleted mantle dating 2431–2719 Ma, with a small amount of mantle-derived material. The Anziping gneiss has a metamorphic zircon age of 1931 ± 13 Ma with an S-type granite protolith belonging to peraluminous *** Anziping gneiss is formed by recycling pre-existing crustal components at 2613–2848 Ma. A minor quantity of mantle-derived magma is also introduced to the crust simultaneously. The samples of Qinggangping gneiss and Anziping gneiss show the characteristics of obvious negative Nb, Ti, and P elements in the spider diagram of primitive mantle standardization. This implies

关键词： Zircon U–Pb dating Geochemistry Huozhou complex Trans-North china.orogen Biotite plagioclase gneiss North china.craton

Multi-stage metallogeny in the southwestern part of South china.and paleotectonic and climatic implications:A high precision geochronologic study

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2023年第3期14卷 131-147页

作者： Yanbin Liu Lifei zhang MSantosh Guochen Dong Hongying Zhou Chaoyang Que Cheng-xue Yang state key laboratory of geological processes and mineral resources and School of Earth Science and ResourcesChina University of GeosciencesBeijing 100083China MOE key laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Department of earth Science University of AdelaideAdelaide SA 5005Australia Tianjin Institute of Geology and mineral resources China Geological SurveyTianjin 300170China Zijin Mining Industry Groups Co. Ltd.Xiamen 361009FujianChina

The South china.Block(SCB)is among the large-scale W-Sn mineralized regions of the *** Laojunshan W-Sn-dominant ore area(LOA)in the western part of the SCB preserves the records of the tectonic history of the Tethys realm extending through North Vietnam,and Yangtze to Cathaysia blocks,with coeval formation of giant metallic *** prolonged tectonic activities and their control on the genesis and spatio-temporal distribution of giant metallic deposits in the LOA provide a window for a holistic understanding of the tectono-metallogenesis of the *** this study,we present results from a multi-chronologic study to determine the timing of formation of the cassiterite-wolframite-schee lite *** results suggest three distinct tectono-metallogenic periods in the LOA during the geodynamic evolution of the surrounding tectonic *** opening of the Proto-Tethys Ocean between the Yangtze-Indochina.blocks and the westward Paleo-Pacific subduction beneath the Cathaysia block(420–380 Ma)jointly contributed to the Silurian to early Devonian intracontinental orogeny in the middle of the SCB that involved top-to-the-north thrusting along NE-striking shear *** event generated the Dulong-Song Chay granitoids,together with the formation of xinzhai Sn deposit related to sheared mylonitic granites(ca.419 Ma)and pegmatites(ca.389 Ma),which include the early-stage Sn-sulfide skarn(ca.418 Ma)and the late-stage Sn-bearing schist(ca.389 Ma).During the Late Permian to Late Triassic(260–220 Ma),with the closure of the Proto-Tethys oceans in the west and ongoing Paleo-Pacific westward subduction in the east,the SCB and Indochina.Block(IB)were amalgamated which also marks the time of formation of the Nanwenhe scheelite skarn *** subducted PaleoTethys oceanic crust was likely entrained by the nearby rising Emeishan mantle plume(270–259 Ma),which formed the Maguan diabase(ca.260 Ma)that shows significantly older Re-Os model age of ca.268 Ma,suggesting

关键词： Sn-W mineralization Geochronology Tectonics setting South china.Block Tethys realm

Critical Metals Ga,Ge and In in the Global Pb-Zn Deposits:Current Understanding,Challenges and Perspectives

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

Journal of earth Science 2023年第4期34卷 1308-1311页

作者： Yi Zheng Peng-Peng Yu Zhan-Ke Li Suo-Fei xiong Ling-Li Zhou Jia-xi Zhou ChangMing Wang Yu-Miao Meng Yu zhang Ye-Jian Wang Jing Xu Yue Wu Lan-Xuan Guo Taiping Zhao Guangdong Provincial key Lab of geological Process and mineral resources survey School of Earth Sciences and Geological EngineeringSun Yat-sen UniversityGuangzhou 510275China state key laboratory of geological processes and mineral resources School of Earth ResourcesChina University of GeosciencesWuhan 430074China Collaborative Innovation center for Exploration of Strategic mineral resources China University of GeosciencesWuhan 430074China Department of earth sciences Vrije Universiteit Amsterdam de Boelelaan 1085Amsterdam 1081HVNetherlands key laboratory of Critical minerals Metallogeny in Universities of Yunnan Province School of Earth SciencesYunnan UniversityKunming 650500China state key laboratory of geological processes and mineral resources School of Earth Sciences and ResourcesChina University of GeosciencesBeijing 100083China state key laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of ScienceGuiyang 550081China key laboratory of Metallogenic Prediction of Nonferrous Metals and geological Environment Monitoring School of Geosciences and Info-PhysicsCentral South UniversityChangsha 410083China key laboratory of Submarine geosciences Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Zijin School of Geology and Mining Fuzhou UniversityFuzhou 350108China key laboratory of Exploration Technologies for Oil and Gas resources Key Laboratory of Petroleum Geochemistry and EnvironmentYangtze UniversityWuhan 430100China Zhongjin Lingnan Nonfemetal Co. LtdShenzhen 518000China key laboratory of mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

BACKGROUND A spectrum of strategically critical metals, such as gallium(Ga), germanium(Ge) and indium(In), with promising applications in green and high-tech fields, are produced as byproducts of zinc ores in a variet... 详细信息

关键词： magmatic hydrothermal porphyry

Characteristics of the genetic mineralogy of pyrite and its significance for prospecting in the Denggezhuang gold deposit,Jiaodong Peninsula,china

在线全文

学校读者我要写书评

暂无评论

Science china.earth sciences 2014年第11期57卷 644-661页

作者： xue JianLing LI ShengRong SUN WenYan zhang YunQiang zhang Xu state key laboratory of geological processes and mineral resources School of Earth Science and ResourcesChina University of Geosciences Development and Research center of china.Geology survey

This paper reports the variation rules for the typomorphic parameters of the pyrite and the gold enrichment rules of the Denggezhuang quartz vein gold deposit at a large-depth scale, providing the mineral signs for deep prospecting prediction through detailed study of the characteristics of crystal＇ habits, chemical composition, the thermoelectricity of pyrites, and min- eralogical mapping. This paper primarily discusses the correlation between the mineralization intensity and the space-time evolution of the mineralogical parameters, clarifies the physicochemical conditions during gold mineralization, and provides information useful for deep mineralization prediction. We demonstrate that the crystal habits of the pyrites are very complex, primarily occurring as （ 100）, （210）, and their combinate form. （210） and （ 100）＋（210） have positive correlations with gold mineralization, and （ 100）＋（210） therefore can be useful for locating rich ore segments. The composition of pyrites is charac- teristically poor in S and rich in As. Their typical trace elements are composed of Mo, As, Pb, Cu, Bi, Zn, Au, Co, Se, Sb, Ag, Ni, Cr, and Te. The average contents of trace elements in pyrites from various stages show that the crystallizing temperature gradually decreased from an early stage to the metallogenic episodes. The precipitation and accumulation of Au and Ag occur primarily in the quartz-pyrite stage （III） and the polymetal minerals stage （IV）. The occurrence rate of P-type pyrites （P（%）） is 83.52%. There is a larger dispersion of the thermoelectrical coefficient of pyrite （a） in the Denggezhuang gold deposit than in other deposits in the Jiaodong Peninsula. The electrical conductivity assemblage of pyrites from I to V is characterized by P〉N〉P〉N〉P〉〉N〉P〉〉N〉P〉N, which is usually considered beneficial for mineralization. The relative contents of As＋Sb＋Se＋Te and Co＋Ni are closely correlated to P-type and N-type average values and their occurrence rates. According to the crystal

关键词： crystal habit chemical composition thermoelectricity pyrite the Denggezhuang gold deposit Jiaodong