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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, li zhiwei, yin hanlong4.& chen yuchuan institute of mineral resources,{4., beijing 100037, China National Center of Rock and mineral Analysis,{4., beijing 100037, 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 100037, 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 33.9±1.1 Ma for the Machangqing deposit and 34.4.0.5 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 (35.4.Ma, 35.9 Ma, 36.2 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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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 wang denghong 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 {4. 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 yuchuan wang denghong 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, 31% of Ag, 77% of gold and 24. of tin come from Himalayan deposits on the east side of the Qinghai-Tibet plateau. Himalayan endogenetic mineralization shows a relatively complete se{4.ence 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 se{4.ences 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 China

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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 yuchuan 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 30 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 3He/4.e ratio of the ore-forming fluid is 2.7×10?6 (varying from 0.19 to 1.97 Ra), the 4.e/4.Ar ratio (0.24.3.12) 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 32%) 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 wang denghong 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-mineralization pattern, i.e. the dynamic mechanisms related to (1) underthrusting or collision, (2) activation of old tectonic belts or activity of new tectonic belts, (3) upwelling of mantle material and heat, and (4. interaction between the atmosphere, hydrosphere, biosphere and lithosphere. 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 mineralization pattern in China can be outlined 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 yuchuan 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 geological 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 mineralization in Southern Jiangxi Province,China

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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 yuchuan yinG {4.juan chen Zhenghui1 ZENG Zai{4.n qu {4. 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 polymetallic 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, China. 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 150.22.1 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 {4.ization 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 {4.ization. According to the collected molybdenite Re-Os dating results in southern Jiangxi province, the timescale of the associated molybdenum {4.ization is 2-6 Ma in the tungsten deposit and the timescale of independent molybdenum {4.ization is 1-4.Ma, implying the complexity of tungsten {4.ization. Times of molybdenum {4.ization are mainly concentrated in the Yanshanian, which includes three stages of 133-135 Ma, 150-162 Ma, and 166-170 Ma, respectively. The 150-162 Ma-stage is in accordance with ages of large-scale WoSn {4.ization, which is mainly molybdenum {4.ization characterized by associated molybdenum {4.ization with development of an even greater-intensity independent molybdenum {4.ization. Independent molybdenum {4.ization occurred before and after large-scale W-Sn {4.ization, 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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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 chen 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 subhedral grains(up to approximately 100 μm×200 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):(Ce4.02La1.64.d1.4.Pr0.4.Sm0.10Gd0.02Ho0.02Tm0.01Lu0.02Y0.03Ca0.66Mg0.05Th(0.01-0.51∑9(Mg0.75Fe0.253+)∑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=10.724.(3)Å,c=37.9528(14.Å,V=3780.39(20)Å3 and Z=*** strongest eight lines in the X-ray diffraction pattern are[d in A(I)(hkl)]:4.518(50)(202),3.4.5(95)(122),3.297(85)(214.,3.098(35)(300),2.94.(100)(02,10),2.683(65)(220),1.94.(4.)(238)and 1.754.4.)(30,18).The crystal structure has been refined to a R1 factor of 0.025,calculated for the 2312 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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LA-ICP-MS Zircon U-Pb Dating of Intermediate-Acidic Intrusive Rocks and Molybdenite Re-Os Dating from the Bangpu Mo (Cu) Deposit, Tibet and its geological Implication

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1225-1240页

作者： wang liqiang chen yuchuan TANG Juxing LU Pengrui LUO Maocheng wang Huan chen Wei LENG Qiufeng institute of mineral resources Chinese Academy of Geological SciencesBeijing 100037China chinese academy of geological sciences Beijing 100037China School of the Earth sciences and resources China University of GeosciencesBeijing 100083China iRock Technologies Beijing 100026China College of Earth sciences Chengdu University of TechnologyChengduSichuan 610059China

The multi-stage intrusions of intermediate-acid magma occur in the Bangpu mining district, the petrogenic ages of which have been identified. The times and sequences of their emplacement have been collated and stipulated in detail in this paper by using the laser ablation-inductively coupled plasma-mass spectrometry （LA-ICP-MS） zircon U-Pb dating method. The ages of biotite monzogranite that were formed before mineralization in the southwest of this mining district are 70±1 Ma （mean square of weighted deviates （MSWD） =9.5, n=8） and 60.60±0.31 Ma （MSWD=3.8, n=16）, which belong to the late Cretaceous-early Paleocene in age. That means, they are products of an early tectonicmagmatic event of the collision between the Indian and Asian continentals. The ages of ore-bearing monzogranite porphyry and ore-bearing diorite porphyrite are 16.23±0.19 Ma （MSWD=2.0, n=26） and 15.16±0.09 Ma （MSWD=3.9, n=5） separately, which belong to the middle Miocene in age; namely, they are products of the Gangdese post-collision extensional stage when crust-mantle materials melted and mixed as well as magmatic intrusion simultaneously occurred. Some zircons with ages of 203.6±2.2 Ma （MSWD=1.18, n=7） were captured in the ore-bearing diorite porphyrite, which shows that there had been tectono-magmatic events in the late Triassic-early Jurassic. Molybdenum （copper） ore-bodies produced in the monzogranite porphyry and copper （molybdenum） ore-bodies produced in the diorite porphyrite are the main ore types in this ore deposit. The model ages of Re-Os isotopic dating for the 11 molybdenite are 13.97-15.84.Ma, while isochron ages are 14.09±0.4. Ma （MSWD=26）. The isochron ages of seven molybdenite from molybdenum （copper） ore with monzogranite porphyry type are 14.11±0.31 Ma （MSWD=5.2）. There is great error in the isochron ages of four molybdenite from copper （molybdenum） ore with diorite porphyrite type, and their weighted average model ages of 14.6±1.2 Ma （MSWD=4.）, which generally represent the min

关键词： LA-ICP-MS zircon U-Pb dating molybdenite Re-Os dating metallogenic dynamics background Bangpu Tibet

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Characteristics of Ore-forming Fluid of the Gaoshan Gold-Silver Deposit in the Longquan Area, Zhejiang Province and its Implications for the Ore Genesis

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1321-1340页

作者： JIANG Biao wang chenghui chen yuchuan WU Baogui {4.AO Peng chen Zhengle HAN Fengbin MLR Key Laboratory of Metallogeny and mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China chinese academy of geological sciences Beijing 100037China No.7 geological Team of Zhejiang Province LishuiZhejiang 323000 institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081

The Gaoshan gold-silver deposit, located between the Yuyao-lishui Fault and Jiangshan- Shaoxing fault in Longquan Area, occurs in the Suichang-Longquan gold-silver polymetallic metallogenic belt. This study conducted an investigation for ore-forming fluids using microthermometry, D-O isotope and trace element. The results show that two types of fluid inclusions involved into the formation of the deposit are pure liquid phase and gas-liquid phase aqueous inclusions. The homogenization temperature and salinity of major mineralization phase ranges from 156~C to 236~C （average 200~C） and 0.35% to 8.68% （NaCleqv）（average 3.68%）, respectively, indicating that the ore-forming fluid is characteristic of low temperature and low salinity. The ore- forming pressure ranges between in 118.02 to 232.13＂105 pa, and it is estabmiated that the ore- forming depth ranges from 0.39 to 0.77 km, indicating it is a hypabyssal deposit in genesis. The low rare earth elements content in pyrites, widely developed fluorite in late ore-forming stage and lack of chlorargyrite （AgCI）, indicates that the ore-forming fluid is rich in F rather than CI. The ratios of Y/ Ho, Zr/Hf and Nb/Ta of between different samples have little difference, indicating that the later hydrothermal activities had no effects on the former hydrothermal fluid. The chondrite-normalized REE patterns of pyrites from country rocks and ore veins are basically identical, with the characteristics of light REE enrichment and negative Eu anomalies, implying that the ore-forming fluid was oxidative and derived partly from the country rocks. The JD and jlSo of fluid inclusions in quartz formed during the main metallogenic stage range from -105%o to -69 %0 and -6.01%o to -3.81%o, respectively. The D-O isotopic diagram shows that the metallogenic fluid is characterized by the mixing of formation water and meteoric water, without involvement of magmatic water. The geological and geochemical characteristics of the Gaoshan gold-silver d

关键词： ore-forming fluid trace elements D-O isotope ore genesis Gaoshan glod-silver deposit

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