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Mineralization episode of porphyry copper deposits in the Jinshajiang-Red River mineralization belt: Re-Os dating

science china Earth sciences 2005年第2期48卷 192-198页

作者： wang denghong, qu wenjun,{2., {3. {4. chen yuchuan institute of Mineral Resources, chinese Academy of geological sciences, beijing 10003., china National Center of Rock and Mineral Analysis, chinese Academy of geological sciences, beijing 10003., china Resource Assessment Center of Yunnan, Kunming 650011, china institute of Geology and Geophysics, chinese Academy of sciences, beijing 100101, china chinese Academy of geological sciences, beijing 10003., china 1. institute of Mineral Resources Chinese Academy of Geological Sciences 100037 Beijing China 2. National Center of Rock and Mineral Analysis Chinese Academy of Geological Sciences 100037 Beijing China 3. Resource Assessment Center of Yunnan 650011 Kunming China 4. institute of Geology and Geophysics Chinese Academy of Sciences 100101 Beijing China 5. chinese Academy of geological sciences 100037 Beijing China

Re-Os isotopic dating for the molybdenites from the porphyry copper deposits of the Jinshajiang-Red River mineralization belt in Yunnan Province yields isochron ages of 3..9±1.1 Ma for the Machangqing deposit and 3..4.0.5 Ma for the Tongchang deposit. This result shows that both the Machangqing and the Tongchang porphyry Cu-Mo deposits from two different ore-fields formed simultaneously. This new data and the published Re-Os model ages of molybdenite (3..4.Ma, 3..9 Ma, 3..2.Ma) of the Yulong porphyry copper deposit in Tibet, which is located in the same Jinshajiang-Red River mineralization belt as the Machangqing deposit and the Tongchang deposit, suggest that these three Cenozoic porphyry copper deposits in the Jinshajiang-Red River mineralization belt were contemporary for their mineralization episode. That is to say, even their present locality is far away and nearly iso-distantly distributed, these three porphyry Cu(Mo) deposits belong to the same mineralization episode at the end of Eocene.

关键词： Re-Os isotopic dating, porphyry Cu deposits, Cenozoic, mineralization episode.

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Three-Dimensional Density Distribution and seismic Activity along the Guxiang–Tongmai segment of the Jiali Fault,Tibet

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Acta Geologica sinica(English Edition) 2024年第2期98卷 454-467页

作者： FAN Pengxiao YU Changqing wang Ruixue ZENG Xiangzhi qu {2. ZHANG Yue institute of Land and Resources Engineering Kunming University of science and Technology Kunming 650000China institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Jiangsu Donghai Continental Deep Hole Crustal Activity National Observation and Research StationLianyungangJiangsu 222000China

The Guxiang-Tongmai segment of the Jiali fault is situated northeast of the Namche Barwa syntaxis in northeastern *** is one of the most active strike-slip faults near the syntaxis and plays a pivotal role in the examination of seismic activity within the eastern Himalayan *** study in the research region has yielded a 1:2.0000 gravity dataset covering an area 1500 km^(2..Using wavelet transform multiscale decomposition,scratch analysis techni{2.es,and 3. gravity inversion methods,gravity anomalies,fault distributions,and density structures were determined across various *** the integration of our new gravity data with other geophysical and geological information,our findings demonstrate substantial variations in the overall crustal density within the region,with the fault distribution closely linked to these density *** in stratigraphic density are important causes of variations in the capacity of geological formations to endure regional tectonic *** are predominantly concentrated within the density transition zone and are primarily situated in regions of elevated *** hanging wall stress within the Guxiang-Tongmai segment of the Jiali fault exhibits a notable concentration,marked by pronounced anisotropy,and is positioned within the density differential zone,which is prone to earth{2.akes.

关键词： seismicity deep-density structure wavelet transform multi-scale decomposition scratch analysis 3. gravity inversion Jiali fault Tibet

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On Minerogenetic series: The Third Discussion

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Acta Geologica sinica(English Edition) 2020年第1期94卷 1-9页

作者： chen yuchuan PEI Rongfu {2. MNR Key Laboratory of Metallogeny and Mineral Assessment Chinese Academy of Geological SciencesBeijing 100037China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China

The minerogenetic(or metallogenetic) series of mineral deposits(called minerogenetic series for short) is an academic idea(concept) of studying minerogenetic characteristics in mineral deposit geology. It uses the views of systematology and mobilism to study mineralizing processes and naturally occurring mineral deposit assemblages formed in various stages of {3. development in specific tectonic environments. The minerogenetic series is also a natural classification of mineral deposits. There are five hierarchical orders in the classification, with the minerogenetic series as the basic order and the core. The first order includes three categories: minerogenetic series association, minerogenetic series type, and minerogenetic series group. The second is the minerogenetic series, which is decomposed into three orders, i.e. the third, fourth, and fifth orders. The third is the minerogenetic subseries, the fourth is mineral deposit models(types), and the fifth is mineral deposits. Minerogenetic series is comparable to a certain extent metallogenic systems both in the research content and in their own research content. The study of minerogenetic series has both great theoretical significance and practical value for mineral prospecting. However, the study is still in its initial stage and a further study remains to be conducted.

关键词： concept of minerogenetic series order theoretic and practicable significance

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Time sequence of Himalayan Endogenetic Mineralization on the East side of the Qinghai-Tibet Plateau

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Acta Geologica sinica(English Edition) 2000年第3期74卷 447-451页

作者： LUO Junlie chen {2. {3. Yunnan Bureau of Geology and Mineral Exploration and Development Kunming 650011Yunnan chinese Academy of geological sciences(CAGs) Beijing 100037 3.Institute of Mineral ResourcesCAGSBeijing 100037

Among the endogenetic deposits in the sanjiang area and at the west margin of the Yangtze platform, Himalayan deposits are the most important and contribute a large proportion of the resources of superlarge deposits. Among the controlled resources of this region, 84. of copper resources, 67% of Pb-Zn, 3.% of Ag, 77% of gold and 2.% of tin come from Himalayan deposits on the east side of the Qinghai-Tibet plateau. Himalayan endogenetic mineralization shows a relatively complete sequence evolution in the sanjiang area and on the west margin of the Yangtze platform. Mineralization is manifested by gold deposits related to K-rich lamprophyre, REE deposits related to alkalic complexes and Cu-Au-polymetallic deposits related to alkaline porphyry. six sequences of mineralization evolution since 65 Ma B.P. in the sanjiang area and on the west side of the Yangtze platform can be recognized. Himalayan endogenetic mineralization on the east side of the Qinghai-Tibet plateau reached its peak before the Oligocene, corresponding to episodes I and II of the intracontinental orogenic cycle. Afterwards, mineralization waned obviously.

关键词： time sequence Himalayan endogenetic deposits Qinghai-Tibet plateau

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Helium,Argon,and Xenon Isotopic Compositions of Ore-forming Fluids in Jinding-Baiyangping Polymetallic Deposits,Yunnan,southwest{2.

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Acta Geologica sinica(English Edition) 2000年第3期74卷 521-528页

作者： XUE Chunji wang denghong chen {2. YANG Jianmin YANG Weiguang institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037 chinese Academy of geological sciences Beijing 100037 No.3.geological Party of Yunnan Province Dali 671000

The Jinding superlarge lead and zinc deposit has attracted the attention of geologists of the world and its metallogenesis has long been in dispute. This paper takes the Jinding deposit and the Baiyangping Cu-Ag-Co deposit which was recently found at about 3. km north of Jinding as one ore belt, and, based on researches on the helium, argon, and xenon isotopic compositions of primary inclusions in ore-forming solutions of the main stage, the authors have found that the 3.e/4.e ratio of the ore-forming fluid is 2.7×10?6 (var{4.g from 0.19 to 1.97 Ra), the 4.e/4.Ar ratio (0.2.–3.12. is close to the mantle characteristic ratio, and the xenon isotopic composition and evolution show characters of the mantle xenon. The above results reveal the characteristics of mantle source and crust-mantle fluid mixing (mantle helium reaching 3.1}) and the metallogenic contributions of the deep processes in the Jinding-Baiyangping ore belt.

关键词： Jinding-Baiyangping ore belt fluid inclusion helium argon and xenon isotopes crust-mantle fluids

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Meso-Cenozoic Mineralization Pattern in the Continent of china

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Acta Geologica sinica(English Edition) 2000年第3期74卷 439-446页

作者： chen yuchuan XU Jue {2. YANG Jianmin XUE Chunji YAN shenhao chinese Academy of geological sciences(CAGs) Beijing 100037 institute of Mineral Resources CAGSBeijing 100037

Based on the complex structure and material resources, the complex geological setting of the Mesozoic-Cenozoic continent of china controlled four kinds of dynamic mechanisms of the continental tectonic-minera{2.zation pattern, i.e. the dynamic mechanisms related to (1) underthrusting or col{2.sion, (2. activation of old tectonic belts or activity of new tectonic belts, (3. upwel{2.ng of mantle material and heat, and (4. interaction between the atmosphere, hydrosphere, biosphere and {2.thosphere. The four dynamic factors are related to and interact with each other; and the mantle-crust interaction leads to the regular time-space zonation of endogenetic deposits on a regional scale. The Meso-Cenozoic minera{2.zation pattern in china can be out{2.ned as the network tectono-metallogenic pattern constructed by NNE- and E-W-trending tectonics in eastern china, and multi-layer ring tectono-metallogenic pattern in the Qinghai-Tibet plateau and its northern and eastern neighbouring areas.

关键词： Meso-Cenozoic mineralization pattern continental mineralization system

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Cenozoic Mineralization in china,as a Key to Past Mineralization and a Clue to Future Prospecting

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Acta Geologica sinica(English Edition) 2000年第3期74卷 478-484页

作者： wang denghong chen {2. XU Jue YANG Jianmin XUE Chunji YAN shenghao institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037 chinese Academy of geological sciences Beijing 100037

Many Cenozoic metal deposits have been found during the past decade. Among them, the Fuwan Ag deposit in Guangdong is the largest Ag deposit in china. Besides, the largest Cu deposit of china in Yulong, Tibet, the largest Pb-Zn deposit of china in Jinding, Yunnan, and the largest Au deposit of china in Jinguashi, Taiwan, were also formed in the Cenozoic. Why so many important “present” deposits formed during such a short period of {4. history is the key problem. The major reason is that different tectonic settings control different kinds of magmatic activity and mineralization at the same time. In southwestern china, porphyry-type Cu deposits such as Yulong were formed during the early stage of the Himalayan orogeny, sediment-hosted Pb-Zn deposits such as Jinding were formed within intermontane basins related to deep faults, and carbonatite-related deposits such as the Maoniuping REE deposit and alkalic magmatic rock-related deposits such as the Beiya Au deposit originated from the mantle source. In southeastern china, the Fuwan Ag deposit was related to continental rifting which was triggered by the mantle plume. In Taiwan, the Jinguashi Au deposit was formed during the subduction process of an oceanic plate beneath a continental plate. Besides, the features such as the diversification, inheritance, large size, deep source of metals and fluids of the Cenozoic (Present or Recent) mineralization can be used as a key to the search for past deposits.

关键词： Cenozoic metallic mineralization minerogenetic series Yulong Cu deposit Jinding Pb-Zn deposit Fuwan Ag deposit Jinguashi Au deposit china

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Isotopic Chronological study of the Huangsha-Tieshanlong quartz Vein-Type Tungsten Deposit and Timescale of Molybdenum Minera{2.zation in southern Jiangxi Province,{3.

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Acta Geologica sinica(English Edition) 2011年第6期85卷 1434-1447页

作者： HUANG Fan FENG chengyou chen {2. {3.G {4.juan chen Zhenghui1 ZENG Zai{4.n qu wenjun Key Laboratory of Metallogeny and Mineral Resource Assessment Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China chinese Academy of geological sciences Beijing 100037 China geological survey Team of south Jiangxi Ganzhou Jiangxi 341000 China National Research Center ofGeoanalysis Beijing 100037 China

The Huangsha-Tieshanlong quartz-vein tungsten polymetal{2.c ore deposit, located in the northern Pangushan-Tieshanlong tungsten ore field in eastern Ganxian-Yudu prospecting areas of the Yushan metallogenic belt, is a well-known tungsten deposit in southern Jiangxi province,{4.. sHRIMP-determined dating of zircons from the Tieshanlong granite yields ages of 168.1±2.1 Ma （n=11, MsWD-1.3.. Rhenium and osmium isotopic dating of molybdenite from the Huangsha quartz-vein tungsten deposit determined by ICP-Ms yields a weighted average ages of 153.3.Ma and model ages of 150.2..1 Ma - 155.4.2.3.Ma. The age of the Huangsha tungsten deposit is 10 to 15 Ma later than the Tieshanlong granite, which shows that there might have been another early Late Jurassic magmatic activity between 150 and 160 Ma, a process which is closely related with tungsten minera{2.zation in this area. The Tieshanlong granite, the Hnangsha tungsten deposit and the Pangushan-Tieshanlong ore field were all formed around 150-170 Ma, belonging to products of a Mesozoic second large-scale minera{2.zation. According to the collected molybdenite Re-Os dating results in southern Jiangxi province, the timescale of the associated molybdenum minera{2.zation is 2.6 Ma in the tungsten deposit and the timescale of independent molybdenum minera{2.zation is 1-4.Ma, implying the complexity of tungsten minera{2.zation. Times of molybdenum minera{2.zation are mainly concentrated in the Yanshanian, which includes three stages of 13.-13. Ma, 150-162.Ma, and 166-170 Ma, respectively. The 150-162.Ma-stage is in accordance with ages of large-scale Wosn minera{2.zation, which is mainly molybdenum minera{2.zation characterized by associated molybdenum minera{2.zation with development of an even greater-intensity independent molybdenum minera{2.zation. Independent molybdenum minera{2.zation occurred before and after large-scale W-sn minera{2.zation, which indicates that favorable prospecting period for molybdenum may be in Cretaceous and e

关键词： sHRIMP zircon U-Pb molybdenite Re-Os ages timescale granite quartz vein-type tungsten deposit Huangsha Tieshanlong Jiangxi

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渤中凹陷CFD6-4.田东营组储层特征及物性控制因素

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地质通报 2024年第5期43卷 701-711页

作者：曹英权曲希玉王清斌王冠民陈思芮中法渤海地质服务有限公司天津300452 中国石油大学(华东)地球科学与技术学院山东青岛266500 中海石油(中国)有限公司天津分公司渤海油田勘探研究院天津300452 中国石油大学(北京)地球科学与技术学院北京102249

曹妃甸6-4.田为渤海中西部发现的优质整装中型油田,但实钻结果表明,该区东营组储层物性差异较大,储层特征及物性控制因素尚不明确。为了解决曹妃甸6-4.田勘探过程中有利储层的预测难题,基于普通薄片、铸体薄片、扫描电镜、物性、粒度... 详细信息

曹妃甸6-4.田为渤海中西部发现的优质整装中型油田,但实钻结果表明,该区东营组储层物性差异较大,储层特征及物性控制因素尚不明确。为了解决曹妃甸6-4.田勘探过程中有利储层的预测难题,基于普通薄片、铸体薄片、扫描电镜、物性、粒度等测试手段和数据,进行了储层岩石学、成岩作用、物性及储集空间特征研究。研究结果揭示:①储层主要为中—细粒岩屑长石砂岩,成分成熟度低,结构成熟度中等—低,储集空间整体以次生溶孔为主。②储层物性控制因素包括沉积微相、岩屑类型及成岩作用。其中辫状河三角洲前缘水下分流河道、辫状河三角洲平原分流河道及扇三角洲前缘水下分流河道对应的砂体粒度大、分选性好、抗压实能力强,有利于原生孔隙的保存,为主控有利储层的沉积微相类型;流纹岩及安山岩中长石含量较高,易发生溶蚀作用形成次生孔隙,改善储层物性,为有利岩屑类型;研究区储层物性受成岩作用改变明显,主控有利储层的成岩相类型为强溶蚀相、中等压实相及弱胶结相。③东营组储层发育2.异常高孔渗带,第一异常高孔渗带是在相对弱压实的背景下,由优势沉积微相控制的;第二异常高孔渗带由优势母岩类型和强溶蚀作用共同控制。

关键词：储层特征物性控制因素渤中凹陷 CFD6-4.田

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Taipingite-(Ce),(Ce73.,Ca2.∑9Mg(siO4.3.siO3.OH)]4.3.a new mineral from the Taipingzhen REE deposit,North Qinling Orogen,central china

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Geoscience Frontiers 2020年第6期11卷 2339-2346页

作者： Kai qu Xianzhang sima Guang Fan Guowu li Ganfu shen Huakai {2. Xing liu Qingqing {4. Ting li Yanjuan wang Tianjin Center China Geological SurveyTianjin 300170China beijing Research institute of Uranium Geology Beijing 100029China china University of Geosciences(beijing) Beijing 100083China chengdu Center China Geological SurveyChengdu 610081China Henan Nuclear geological Bureau Zhengzhou 450044China

A new cerite group mineral species,taipingite-(Ce),ideally(Ce7^3.,Ca2.∑9Mg(siO4.3.siO3.OH)]4.F3.has been found in the Taipingzhen rare earth element(REE)deposit in the North Qinling Orogen(NQO),Central *** forms subh... 详细信息

A new cerite group mineral species,taipingite-(Ce),ideally(Ce7^3+,Ca2.∑9Mg(siO4.3[siO3(OH)]4.F3,has been found in the Taipingzhen rare earth element(REE)deposit in the North Qinling Orogen(NQO),Central *** forms subhedral grains(up to approximately 100 μm×2.0 μm)commonly intergrown with the REE mineral assemblages and is closely associated with allanite-(Ce),gatelite-(Ce),tornebohmite-(Ce),fluocerite-(Ce),fluocerite-(La),fluorite,bastnasite-(Ce),parisite-(Ce)and ***-(Ce)is light red to pinkish brown under a binocular microscope and pale brown to colorless in thin section,and it is translucent to transparent with a grayish-white streak and vitreous *** mineral is brittle with conchoidal fracture;has a Mohs hardness value of approximately 51/2.and exhibits no cleavage twinning or *** calculated density is 4.900(5)g/***,taipingite-(Ce)is uniaxial(+),withω=1.808(5),ε=1.812.7),c=ε,and a=b=ω.Furthermore,this mineral is insoluble in HCl,HNO3 and H2.*** microprobe analysis demonstrated that the sample was relatively pure,yielding the empirical formula(with calculated H2.O):(Ce4.02.a1.64.d1.4.Pr0.4.sm0.10Gd0.02.o0.02.m0.01Lu0.02.0.03Ca0.66Mg0.05Th(0.01-0.51∑9(Mg0.75Fe0.2.3+)∑1(siO4.3{[siO3(OH)]3.98[PO3(OH)]0.02.∑4.F1.81OH1.17Cl0.02.***-(Ce)is trigonal and exhibits space group symmetry R3 c with unit cell parameters a=10.72.6(3)Å,c=37.952.(14.Å,V=3780.39(2.)Å3 and Z=*** strongest eight lines in the X-ray diffraction pattern are[d in A(I)(hkl)]:4.518(50)(2.2.,3.4.5(95)(12.),3.2.7(85)(2.4.,3.098(35)(300),2.94.(100)(02.10),2.683(65)(2.0),1.94.(4.)(2.8)and 1.754.4.)(30,18).The crystal structure has been refined to a R1 factor of 0.02.,calculated for the 2.12.unique observed reflections(Fo≥4.).The mineral is named after its discovery locality and is characterized as the F-dominant analogue of cerite-(Ce).

关键词： Taipingite-(Ce) Cerite group New mineral species Chemical composition Crystal structure North Qinling Orogen

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