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chinese Science Bulletin 1999年第S2期44卷 227-230页

作者： deng hailin~1, li chaoyang~1, zhou yunman~2.and wang congwu~2.1. open laboratory of ore deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 550002. china 2. No.3 Braneh of No.1 Geology Party, Yunnan Bureau of Geology and Mineral Resources, Xundian 655205, china open laboratory of ore deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China No. 3 Branch No. 1 Geology Party Yunnan Bureau of Geology and Mineral Resources Xundian 655205 China

IN the study of hydrothermal deposits sulfur isotopes bear much information about the source of sulfur,ore-forming temperature, the evolution of ore-forming fluids and the mechanism of metallogenesis. Todetermine whether sulfur isotopes reach equilibrium between fluids and sulfur-bearing minerals precipitated from the former and among the sulfur-bearing minerals is the key to the application of sulfur isotopegeochemistry to geological problems. As it has been commonly accepted that sulfur isotopic equilibrium could not be reached between sulfate and sulfide below 350℃, little attention has been paid to thepossible mechanism of sulfur isotope equilibrium between sulfate and sulfide below 300℃. However, this note presents an example to show sulfur isotope equilibrium between barite and sulfate

关键词： sulfur isotope Lemachang independent Ag deposit barite freibergite sulfur isotope equilibrium below 300℃.

Oxygen isotope as a tracer of REE fractionation in water-rock interaction

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chinese Science Bulletin 1999年第S2期44卷 224-226页

作者： deng hailin~1, li chaoyang~1, zhou yunman~2.and wang Chongwu~2.1. open laboratory of ore deposit geochemistry, institute of geochemistry chinese academy of sciences, guiyang 550002. china 2. No.1 Geological Party, Yunnan Bureau of Geology and Mineral Resources, Xundian 655205, china open laboratory of ore deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China No. 1 Geological Party Yunnan Bureau of Geology and Mineral Resources Xundian 655205 China

STABLE oxygen isotope is not only an effective approach to tracing water-rock interactions, but also canprovide much information about ore-forming temperature and source and evolution of ore fluids in thestudy of hydrothermal deposits. The rare-earth elements (REE) can be used to trace the sources ofore-forming materials and can also, to some extent, indicate the physical and chemical properties of fluids in the geochemical processes. The combination of these two aspects of research can effectivelyprobe into the geochemical behavior and evolution of REE in the process of water-rock interaction duringhydrothermal ore deposition. On the other hand, the essence of REE as tracers in hydrothermal mineralization can be better understood. In this note the Lemachang independent Ag deposit in northeastern Yunnan is selected for a case study.

关键词： oxygen isotope tracer water-rock interaction REE fractionation.

Sulfur Isotopes geochemistry of the Nage Cu-Pb Polymetallic deposit,Southeast Guizhou Province,china

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矿物学报 2009年第S1期29卷 128-128页

作者： LONG Xuan-lin1,zhou Jia-xi2,HUANG Zhi-long2,wang Jing-song1,YANG De-zhi1,3,FAN liang-wu2,BAO Guang-ping2,liU Yong-kun1(1. The 102 Geological Team,Guizhou Bureau of Exploration and Development of Geology and Mineral Resources,Zunyi 563003,china 2. State key laboratory of ore deposits geochemistry,institute of geochemistry,chinese academy of Science,guiyang 550002.china 3. china University of Geosciences(Wuhan) ,Wuhan 430074,china) evidence.

The Nage Cu-Pb polymetallic deposit is located in the transitional zone of the Yangtze craton and cathaysia,that is the southwest of Jiangnan orogenic belt. The mainly strata are Wentong formation of Mesoproterozoic Sibo group and the Jialu formation(Qbj) ,Wuye formation(Qbw) ,Fanzhao formation(Qbf) and Gongdong formation(Qbg) of the Neoproterozoic Qingbaikou System Xiajiang group.

关键词： Pb Sulfur Isotopes geochemistry of the Nage Cu-Pb Polymetallic deposit,Southeast Guizhou Province,china Cu

Molybdenite Re-Os,titanite and garnet U-Pb dating of the Magushan skarn Cu-Mo deposit,Xuancheng district,Middle-Lower Yangtze River Metallogenic Belt

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Geoscience Frontiers 2021年第3期12卷 399-415页

作者： Yue li Feng Yuan Simon M.Jowitt Fangyue wang Xiangling li Yufeng deng Yunyue wang Taofa zhou School of Resources and Environmental Engineering Hefei University of TechnologyHefei 23009China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei University of TechnologyHefei 23009China Department of Geoscience University of Nevada Las Vegas4505 S.Maryland Pkwy.NV 89154-4010USA

The Magushan skarn Cu-Mo deposit is a representative example of the skarn mineralization occurring within the Xuancheng ore district of the Middle-Lower Yangtze River Metallogenic Belt of eastern *** precise age of an ore deposit is important for understanding the timing of mineralization relative to other geological events in a region and to fully place the formation of a mineral deposit within the geological context of other processes that occur within the study ***,we present new molybdenite Re-Os and titanite and andradite garnet U-Pb ages for the Magushan deposit and use these data to outline possible approaches for identifying genetic relationships in geologically complex *** spatial and paragenetic relationships between the intrusions,alteration,and mineralization within the study area indicates that the formation of the Magushan deposit is genetically associated with the porphyritic ***,this is not always the case,as some areas contain complexly zoned plutons with multiple phases of intrusion or mineralization may be distal from or may not have any clear spatial relationship to a *** means that it may not be possible to determine whether the mineralization formed as a result of single or multiple magmatic/hydrothermal *** such,the approaches presented in this study provide an approach that allows the identification of any geochronological relationships between mineralization and intrusive events in areas more complex than the study *** published zircon U-Pb data for the mineralization-related porphyritic granodiorite in this area yielded an age of 134.2.1.2 Ma(MSWD=1.4)whereas the Re-Os dating of molybdenite from the study area yielded an isochron age of 137.7±2.5 Ma(MSWD=0.43).The timing of the mineralizing event in the study area was further examined by the dating of magmatic accessory titanite and skarn-related andradite garnet,yielding U-Pb ages of 136.3±2.5 Ma(MSWD=3.2.and 135.9±2.7 Ma(MSWD=2.

关键词： Magushan skarn deposit Molybdenite Re-Os dating Titanite U-Pb dating Garnet U-Pb dating Xuancheng ore district Middle-Lower Yangtze River Metallogenic Belt

Combined garnet,scheelite and apatite U-Pb dating of mineralizing events in the Qiaomaishan Cu-W skarn deposit,eastern china

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Geoscience Frontiers 2023年第1期14卷 17-32页

作者： Yue li Feng Yuan Simon M.Jowitt Xiangling li Taofa zhou Fangyue wang Yufeng deng ore deposit and Exploration Centre(ODEC) Hefei University of TechnologyHefei 23009China Anhui Province Engineering Research Center for Mineral Resources and Mine Environments Hefei 23009China Department of Geoscience University of Nevada Las Vegas4505 S.Maryland Pkwy.NV 89154-4010USA

Determining the precise timing of mineralization and mineralizing events is crucial to understanding regional mineralizing and other geological events and ***,there are a number of mineralogical and analytical limitations to the approaches developed for the absolute dating of mineralizing systems,such as molybdenite Re-Os and zircon and garnet U-Pb,among *** means that the precise and accurate dating of mineralizing systems that may not contain minerals suitable for dating using existing approaches requires the development of new(and ideally in situ)approaches to absolute *** study outlines a new in situ analytical approach that has the potential to rapidly and accurately evaluate the timing of ore *** study employs a novel application of in situ scheelite U-Pb dating analysis using laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)and samples from the Qiaomaishan deposit,a representative example of skarn mineralization within the Xuancheng ore district of eastern *** approach to scheelite dating of the deposit is verified by cross-comparison to dating of cogenetic garnet and apatite,proving the effectiveness of this *** new approach to dating of scheelite-bearing geological systems is rapid,cheap,requires little sample preparation,and is undertaken in situ,allowing crucial geological and mineralogical context to be retained during *** approaches outlined here not only allow the determination of the absolute timing of formation of the Qiaomaishan deposit through the U-Pb dating of scheelite[138.6±3.2 Ma,N=39,mean square weighted deviation(MSWD)=1.17],garnet(138.4±1.0 Ma,N=40,MSWD=1.3),and apatite(139.6+3.3 Ma,N=35,MSWD=0.72),but also further supports the theoretical genetic links between this mineralization and the emplacement of a proximal porphyritic granodiorite intrusion(zircon U-Pb age:139.5±1.2 Ma,N=23,MSWD=0.3).Moreover,our research indicates that the higher the concentrations

关键词： In-situ scheelite U-Pb dating In-situ garnet U-Pb dating In-situ apatite U-Pb dating Qiaomaishan skarn deposit

Late Paleozoic Fluid Systems and Their ore-forming Effects in the Yuebei Basin,Northern Guangdong,china

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 673-687页

作者： deng Jun YANG liqiang SUN Zhongshi wang Jianping wang Qingfei CHENG Xueming zhou Yinghua State Key laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key laboratory of lithosphere Tectonics and lithoprobing Technology of the Ministry of Education China University of Geosciences Beijing 100083 School of Earth sciences Jilin University Chuangchun Jilin 130061

Based on detailed and systematic researches of the geology of ore deposits, fluid inclusions and isotope geochemistry etc., and regarding the Late Paleozoic fluid system of the Yuebei Basin as an integrated object in this paper, we have revealed the temporo-spatial evolution law of the basin＇s fluid system and discussed its ore-forming effects by simulating and analyzing the distribution of ore-forming elements, the fluid thermodynamics and dynamics of evolution processes of this basin. The results show that Late Paleozoic ore-forming fluid systems of the Yuebei Basin include four basic types as follows. （1） The sea floor volcanic-exhalation system developed during the rapid basin slip-extension stage in the Mid-Late Devonian, which affected the Dabaoshan region. It thus formed the Dabaoshan-type Cu-Pb-Zn-Fe sea floor volcanic-exhalation sedimentary deposits. （2） The compaction fluid system developed during the stable spreading and thermal subsidence-compression stage of the basin in the Mid-Late Devonian. The range of its effects extended all over the whole basin. It resulted in filling-metasomatic deposits, such as the Hongyan-type pyrite deposits and pyrite sheet within the Fankou-type Cu-Pb-Zn-S deposits. （3） The hot water circulation system of sea floor developed during the stage of basin uplifting and micro-aulacogen from the late Late Carboniferous to Middle Carboniferous. The range of its effects covered the Fankou region. It thus formed MVT deposits, such as the main orebody of the Fankou-type Pb-Zn-S deposits. （4） The gravity fluid system developed during the stage of fold uplifting and the basin closed from Middle Triassic to Jurassic, forming groundwater hydrothermal deposits, e.g. the veinlet Pb-Zn-calcite orebodies of the Fankou-type Pb-Zn- S deposits. Migration and concentration of the ore-forming fluids were constrained by the state of temporo-spatial distribution of its fluid potential. Growth faults not only converged the fluids and drove them to m

关键词： fluid system stratabound deposit Late Paleozoic Yuebei Basin Guangdong

Constraints on the Ediacaran-Cambrian boundary in deep-water realm in South china: Evidence from zircon CA-ID-TIMS U-Pb ages from the topmost liuchapo Formation

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Science china Earth sciences 2020年第8期63卷 1176-1187页

作者： Wei wang Mingzhong zhou Zhuyin CHU Junjie XU Chaofeng li Taiyi LUO Jinghui GUO State Key laboratory of lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of chinese academy of sciences Beijing 100049China Innovation academy for Earth Science Chinese Academy of SciencesBeijing 100029China School of Geographical and Environmental sciences Guizhou Normal UniversityGuiyang 550001China:China University of GeosciencesBeijing 100083China:State Key Laboratory of Ore Deposit GeochemistryInstitute of GeochemistryChinese Academy of SciencesGuiyang 550002China

The placement of the Ediacaran-Cambrian boundary in deep-water realm in South china and the high-precision temporal framework for the Ediacaran-Cambrian transition in this region have not yet been completely solved. Recently, we have found two K-bentonite beds in the top of the liuchapo Formation at the Pingyin section, Guizhou Province. It provides an opportunity for constructing the temporal framework of the transitional strata on the Yangtze Platform in South china and for determining the Ediacaran-Cambrian boundary in this area. In this study, we conducted high-precision CA-ID-TIMS U-Pb dating on zircons from the two K-bentonites. The ages of the two K-bentonites were precisely constrained at 536.40±0.47/1.1/1.2 Ma(2σ, n=7, MSWD=0.92) and 541.48±0.46/1.1/1.2 Ma(2σ, n=8, MSWD=1.3). Combining the geochronological results with organic carbon isotope data of chert in the topmost liuchapo Formation from the section, we suggest that the EdiacaranCambrian boundary should be consistent with a significant negative organic carbon isotope excursion between the two Kbentonites. The scheme of the Ediacaran-Cambrian boundary in this study is of great significance for global correlation, and further for unravelling the information of the terminal Ediacaran-early Cambrian ocean.

关键词： liuchapo Formation Yangtze Platform Ediacaran-Cambrian CA-ID-TIMS Organic carbon isotope

黔西南板其卡林型金矿床方解石REE、Fe、Mn元素特征及其对找矿的指示意义

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大地构造与成矿学 2018年第3期42卷 494-504页

作者：王加昇韩振春李超高振华杨毅周国超昆明理工大学国土资源工程学院西南地质调查所云南昆明650093 国家地质实验测试中心北京100037 山东省第八地质矿产勘查院山东日照276800 贵州华金矿业有限责任公司贵州贵阳550002

板其金矿床是黔西南卡林型金矿矿集区内的重要组成部分,是中国发现的第一个卡林型金矿床。方解石是其最主要的脉石矿物,按形成时间可分为成矿前、主成矿期、成矿晚期、成矿期后四种类型。各类型方解石无论野外产状、物性标型特征还是微... 详细信息

板其金矿床是黔西南卡林型金矿矿集区内的重要组成部分,是中国发现的第一个卡林型金矿床。方解石是其最主要的脉石矿物,按形成时间可分为成矿前、主成矿期、成矿晚期、成矿期后四种类型。各类型方解石无论野外产状、物性标型特征还是微量元素地球化学特征均不一致。四种类型方解石相比较,成矿前方解石稀土元素总量最高(ΣREE=29.70～40.10μg/g),最富集轻稀土元素(LREE/HREE=1.96～3.03),具有最大正Eu异常(δEu=3.83～5.02),无明显Ce异常(δCe=1.02.1.05);主成矿期方解石稀土元素总量相对较低(ΣREE=10.76～15.53μg/g),最富集重稀土元素(LREE/HREE=0.11～0.23),Eu异常(δEu=0.73～1.20)与Ce异常(δCe=0.88～1.25)均不明显;成矿晚期方解石稀土元素总量最低(ΣREE=2.82～4.34μg/g),与主成矿期方解石相似,具有重稀土元素富集特征(LREE/HREE=0.26～0.86),具有弱的负Eu异常(δEu=0.67～0.83)及负Ce异常(δCe=0.55～0.81);成矿期后方解石稀土元素总量相对较低(ΣREE=6.92.1..91μg/g),轻稀土元素富集(LREE/HREE=1.83～2.34),弱负Eu异常(δEu=0.72～0.74)与中等负Ce异常(δCe=0.41～0.50)。此外,成矿期方解石Fe、Mn元素含量明显高于非成矿期方解石,而且方解石Fe+Mn含量与LREE/HREE比值具有明显负相关关系,说明板其金矿床方解石富集重稀土元素与其所含的Fe、Mn元素有关。对方解石各种标型特征的研究,将为滇黔桂卡林型金矿找矿勘查提供重要手段。

关键词：板其卡林型金矿床方解石稀土元素 Fe、Mn元素找矿

The Structure of ore-controlling Strain and Stress Fields in the Shangzhuang Gold deposit in Shandong Province,china

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Acta Geologica Sinica(English Edition) 2008年第4期82卷 769-780页

作者： deng Jun wang Qingfei YANG liqiang zhou Lei GONG Qingjie YUAN Wanming XU Hao GUO Chunying liU Xiangwei State Key laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key laboratory of lithosphere Tectonics and lithoprobing Technology of Ministry of Education China University of Geosciences Beijing 100083

The Shangzhuang altered-rock type gold ore deposit is located in the middle segment of and controlled by the wang＇ershan fault zone in the northwestern part of the Jiaodong gold province, china. The deformation evolution, the structure of strain and stress fields and its ore-controlling effect in the Shangzhuang deposit are discussed in this paper. It is revealed that the deformation evolution has mainly undergone four phases： the early ductile deformation, the second NE-striking horizontal simple shear, the third NE-striking compression-shear and the final NW-striking compression. The mineralization happened during the third stage in which the maximum principal stress gradually transited from NE to NW. The 3-D numerical simulations of the stress field show that, on the condition that the maximum principal stress is NE-striking, the fracture development in the fault zone is favored, while when the maximum principal stress is NW-striking, the fault zone is relatively extensional and it is suitable for the influx and emplacement of ore-forming fluids. The compression-shear strain field during the mineralization is characterized by the λ-type structure, the positive flower structure, etc. orebodies are mostly equidistantly located in the dilatational spaces, which are distributed in the integral compressional circumstances. And the dilatational spaces are developed where the fault attitude changes or shear joint systems develop. In the overall compression-shear stress field, the strain field bears self-similarity at multiple scales, including the orebody, ore deposit and orefield. The selfsimilarity of the structure comprises the subequidistant distribution of fractures at the same scale and the similar shape of the fractures at various scales. Yet, due to the special geological structure, the orebodies are mostly located in the hanging wall in the Shangzhuang deposit, which is different from most deposits in the Jiaodong gold province. Analyses of the ore-controlling

关键词： Shangzhuang gold deposit 3-D structural stress field altered rock

Geology and mineralization of the Bayan Obo supergiant carbonatite-type REE-Nb-Fe deposit in Inner Mongolia, china: A review

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china Geology 2023年第4期6卷 716-750,I0004,I0005页

作者： Yi-ke li Chang-hui Ke Hong-quan She deng-hong wang Cheng Xu An-jian wang Rui-ping li Zi-dong Peng Ze-ying Zhu Kui-feng Yang Wei Chen Jian-wei Zi Wen-lei Song Yong-gang Zhao li Zhang Hong Yu Bin Guo Sheng-quan zhou Xing-yu Yuan Jing-yao liu MNR Key laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China Key laboratory of Orogenic Belts and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China Key laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China John de Laeter Centre Curtin UniversityBentleyWA 6102Australia State Key laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Bayan Obo Iron Mine Baotou Steel(Group)Co.Ltd.Inner MongoliaBaotou 014080China

The Bayan Obo supergiant carbonatite-related rare-earth-element-niobium-iron(REE-Nb-Fe) endogenetic deposit(thereafter as the Bayan Obo deposit), located at 150 km north of Baotou City in the Inner Mongolia Autonomous Region, is the largest rare-earth element(REE) resource in the world. Tectonically,this deposit is situated on the northern margin of the North china Craton and adjacent to the Xing’anMongolian orogenic belt to the south. The main strata within the mining area include the Neoarchean Se’ertengshan Group and the Mesoproterozoic Bayan Obo Group. Generally, the rare earth, niobium, and iron mineralization within the deposit are intrinsically related to the dolomite carbonatites and the extensive alteration of the country rocks caused by the carbonatite magma intrusion. The alteration of country rocks can be categorized into three types: contact metasomatism(anti-skarn and skarn alteration), fenitization,and hornfelsic alternation. As indicated by previous studies and summarized in this review, the multielement mineralization at Bayan Obo is closely associated with the metasomatic replacement of siliceous country rocks by carbonatite magmatic-hydrothermal fluids. The metasomatic process is comparable to the conventional skarnification that formed due to the intrusion of intermediate-acid magmatic rocks into limestone strata. However, the migration pattern of Si O2, Ca O, and Mg O in this novel metasomatic process is opposite to the skarn alteration. Accordingly, this review delineates, for the first time, an antiskarn metallogenic model for the Bayan Obo deposit, revealing the enigmatic relationship between the carbonatite magmatic-hydrothermal processes and the related iron and rare earth ***, this study also contributes to a better understanding of the REE-Nd-Fe metallogenetic processes and the related fluorite mineralization at the Bayan Obo deposit.

关键词： Rare earth elements Niobium ore Iron ore Fluorite ore Igneous carbonatite Fenitization Metasomatism Anti-skarn Bayan Obo