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Zircon LA-ICP-MS U-Pb dating and Sr-Nd isotope study of the Guposhan granite complex, Guangxi, China

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Chinese Journal Of Geochemistry 2007年第3期26卷 290-300页

作者： GU Shengyan hua renmin QI huawen State Key Laboratory for Mineral Deposits Research Nanjing University Nanjing 210093 China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

Zircon U-Pb dating by the LA-ICP-MS method was applied to determining the ages of different units of the Guposhan granite complex, among which the East Guposhan unit is 160.8±1.6 Ma, the West Guposhan unit is 165.0±1.9 Ma, and the Lisong unit is 163.0±1.3 Ma in age. Much similarity in ages of the three units has thus proved that the whole Guposhan granite complex was formed in the same period of time. They were the products of large-scale granitic magmatism through crust-remelting in the first stage of the Middle Yanshanian in South China. However, the three units have differences both in petrology and in geochemistry. Besides the differences in major, trace and rare-earth elements, they are distinct in their Rb-Sr and Sm-Nd isotopic compositions. The East Guposhan unit and Lisong unit and its enclaves have a similar (87Sr/86Sr)i value of 0.7064 with an average of εNd(t)=-3.03, indicating that more mantle material was evolved in the magma derivation; whereas the West Guposhan unit has a higher (87Sr/86Sr)i value of 0.7173 but a lower εNd(t) value of -5.00, and is characterized by strong negative Eu anomalies and higher Rb/Sr ratios, suggesting that its source materials were composed of relatively old crust components and new mantle-derived components. In addition, an inherited zircon grain in the East Guposhan unit (GP-1) yielded a 206Pb/238U age of 806.4 Ma, which is similar to the ages of the Jiulin cordierite granite in northern Jiangxi and of the Yinqiao migmatic granite in Guangxi in the HZH granite zone. All this may provide new evidence for Late Proterozoic magmatism in the HZH granite zone.

关键词：锆石地质年代学同位素地质学测量方法

Rb-Sr Dating of Pyrite and Quartz Fluid Inclusions and Origin of Ore-forming Materials of the Jinshan Gold Deposit, Northeast Jiangxi Province, South China

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Acta Geologica Sinica(English Edition) 2013年第6期87卷 1658-1667页

作者： MAO Guangzhou hua renmin LONG Guangming LU Huijuan Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Minerals College of Geological Sciences & Engineering Shandong University of Science and Technology State Key Laboratory of Mineral Deposit Research School of Earth Sciences and Engineering Nanjing University

The Jinshan gold deposit is located in the Northeast Jiangxi province,South China,which related to the ductile shear *** contains two ore types,*** alteration-type ore and the goldbearing quartz vein ***-Sr age dating is applied to both gold-bearing pyrite in the alteration-type ore and fluid inclusion in the gold-bearing quartz vein to make clear the time of the gold mineralization of the Jinshan *** results of this study yielded that the age of the alteration-type ore bodies is about 838±110Ma,with an initial 87Sr/86Sr value of 0.7045±***,the age of the gold-bearing quartz vein-type ore is about 379±49Ma,and the initial 87Sr/86Sr is 0.7138±*** on the age data from this work and many previous studies,the authors consider that the Jinshan gold deposit is a product of multi-staged mineralization,which may include the Jinninian,Caledonian,Hercynian,and Yanshanian *** them,the Jinninian Period and the Hercynian Period might be the two most important ore-forming periods for Jinshan *** Jinninian Period is the main stage for the formation of alteration-type ore bodies,while the Hercynian Period is the major time for ore bodies of gold-bearing quartz vein *** initial values of the 87Sr/86Sr from this study,as well as the previous isotope and trace element studies,indicate that the ore-forming materials mainly derived from the metamorphic wall rocks,and the ore-forming fluids mainly originated from the deep metamorphic water.

关键词： Gold deposit mineralization time quartz fluid inclusion pyrite Rb-Sr dating Origin of the ore-forming materials Jinshan Jiangxi province

He-Ar isotope geochemistry of the Yaoling-Meiziwo tungsten deposit,North Guangdong Province:Constraints on Yanshanian crust-mantle interaction and metallogenesis in SE China

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Chinese Science Bulletin 2012年第10期57卷 1150-1159页

作者： ZHAI Wei SUN XiaoMing WU YunShan SUN YanYan hua renmin YE XianRen Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering Guangzhou 510006 China School of Marine Sciences Sun Yat-sen University Guangzhou 510275 China Department of Earth Sciences Sun Yat-sen University Guangzhou 510275 China Geological Survey Institute of Guangdong Nonferrous Metals Geological Survey Bureau Guangzhou 510080 China State Key Laboratory of Mineral Deposit Research Nanjing University Nanjing 210093 China Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou 730000 China

Isotopic abundances and ratios of He and Ar found in inclusion fluids in pyrites formed in the Yaoling-Meiziwo tungsten miner-alization epoch show that the concentration of 4He varies widely,from 1.54×10-7 cm3 STP/g to 2609×10-7 cm3 STP/g.3He is 0.759×10-12 cm3 STP/g-3.463×10-12 cm3 STP/g.3He/4He is 0.0043-4.362 Ra,varying from crustal to mantle *** concen-tration of 40Ar ranges from 0.624×10-7 cm3 STP/g to 8.89×10-7 cm3 STP/*** 40Ar/36Ar varies extensively,from 330 to 2952,between atmospheric and crustal or mantle radiogenic ***-derived He is present in ore-forming fluids and the calcu-lated average proportion of the mantle He is 22%;the maximum is 67%.Our research results show that mantle-derived fluids play a significant role in tungsten *** fractionation of He and Ar indicate that there was 4He-enriched air-saturated water(MSAW) in the ore-forming *** ore-forming fluid was a mixture of mantle fluid,crustal magmatic fluid and *** occurrence of a mantle component in ore-forming fluid indicates the large-scale W and Sn mineralization,including Yaol-ing-Meiziwo,in southeastern China was the result of crust and mantle *** underplating or intrusion of voluminous basaltic magma formed by partial melting of the upper mantle provided the necessary heat to cause partial melting of the crust and the generation of voluminous S-type granitic *** magmatic fluid and mantle fluid with high 3He/4He were released from magma crystallization and fractionation,mixed with the circulating modified air-saturated water,and filled the extensional tectonic fractures,leading to the formation of world-class W and Sn deposits in southeastern China.

关键词：中国东南部壳幔相互作用成矿流体同位素地球化学钨矿 Ar 广东省地幔流体

Rare Earth Element and Trace Element Features of Gold-bearing Pyrite in the Jinshan Gold Deposit,Jiangxi Province

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Acta Geologica Sinica(English Edition) 2010年第3期84卷 614-623页

作者： MAO Guangzhou hua renmin GAO Jianfeng ZHAO Kuidong LONG Guangming LU Huijuan YAO Junming State Key Laboratory of Mineral Deposits Research School of Earth Science and Engineering Nanjing University Nanjing 210093 China College of Geological Science and Engineering Shandong University of Science and Technology Qingdao 266510 China

Jinshan gold deposit is located in northeastern Jiangxi,South China,which is related to the ductile shear *** has a gold reserve of more than 200 tons,with 80%of gold occurring in pyrite. The LREE of gold-bearing pyrite is as higher as 171.664 ppm on average,with relatively higher light rare earth elements（LREE;159.556 ppm） and lower HREE（12.108 ppm）.TheΣLREE/ΣHREE ratio is 12.612 and（La/Yb）_N is *** indicate that pyrite is rich in ***（La/Sm）_N ratio is 3.758 and that of（Gd/Yb）_N is *** are obvious LREE *** rare earth element（REE） distribution patterns show obvious Eu anomaly with averageδEu values of 0.664,andδCe anomalies of *** characteristics are similar to those of wall rocks（regional metamorphic rocks）,but different from those of the Dexing granodiorite porphyry and Damaoshan biotite *** features indicate that the ore-forming materials in the Jinshan gold deposit derived from the wall rocks, and the ore-forming fluids derived from metamorphic *** Co/Ni ratio（average value 0.38） of pyrite suggests that the Jinshan gold deposit formed under a medium-low *** is inferred from the values of high-field strength elements,LREE,Hf/Sm,Nb/La,and Th/La of the pyrite that the ore-forming fluids of the Jinshan gold deposit derived from metamorphic water with Cl〉F.

关键词： rare earth element trace element pyrite ore-forming fluid geochemistry Jinshan gold deposit

Metallogenesis related to Mesozoic Granitoids in the Nanling Range, South China and Their Geodynamic Settings

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Acta Geologica Sinica(English Edition) 2005年第6期79卷 810-820页

作者： hua renmin CHEN Peirong ZHANG Wenlan YAO Junming LIN Jinfu ZHANG Zhanshi GU Shengyan LIU Xiaodong QI huawen State Key Laboratory for Mineral Deposit Research Nanjing University Nanjing 210093 China

Affected by the compressive stress from the South-Central （Indo-China） Peninsula, the Indosinian orogenesis, characterized by collision, thrust and uplifting, took place inside the South China Plate during 250-230 Ma. The ages of the Indosinian granitoids in the Nanling Range and vicinity areas are mostly 240-205 Ma, indicating that they were emplaced in both late collision and post-collision geodynamic environments. No important granite-related metallogenesis occurred in this duration. A post-orogenic setting started at the beginning of the Yanshanian Period, which controlled large-scale granitic magmatism and related metallogenesis. This paper makes the first attempt to divide the Yanshanian Period into three sub-periods, i.e. the early, middle and late Yanshanian Periods, based mainly on the features of magmatism, especially granitoids and related metallogenesis and their geodynamic environments. The magmatic association of the Early Yanshanian （about 185-170 Ma） comprises four categories of magmatism, i.e. basalt, bimodal volcanics, A-type granite and intraplate high-K calc-alkaline （HKCA） magmatism, which indicates an extension-thinning of lithosphere and upwelling of mantle material to a relative small and local extent. Pb-Zn, Cu and Au mineralizations associated with HKCA magmatism represents the first high tide of Mesozoic metallogenesis in the Nanling Range area. During the middle Yanshanian, the lithosphere was subjected to more extensive and intensive extending and thinning, and hence mantle upwelling and basaltic magma underplating caused a great amount of crust remelting granitoids. This period can be further divided into two stages. The first stage （170-150 Ma） is represented by large-scale emplacement of crust remelting granites with local tungsten mineralization at its end. The second stage （150-140 Ma） is the most important time of large-scale mineralizations of non-ferrous and rare metals, e.g. W, Sn, Nb-Ta, Bi, Mo, Be, in the Nanling Range area. T

关键词： metallogenesis granitoids geodynamic setting Yanshanian Period Nanling Range

The relationship between epithermal and low temperature mineralizations

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Chinese Science Bulletin 1999年第S2期44卷 226-227页

作者： hua renmin State Key Laboratory of Mineral Deposit Research, Nanjing University, Nanjing 210093, China State Key Laboratory of Mineral Deposit Research Nanjing University Nanjing 210093 China

THE term epithermal as a kind of hydrothermal mineralization was first used by Lindgren in 1933. It describes those ore-forming systems occurring at depths mainly less than 1 km, and at temperatures less than300℃. Epithermal deposits of Cenozoic ages are widely distributed in the Circum-Pacific belt, especiallyin the Southwest Pacific area. From the 1980s on, the study of epithermal ore deposits became an important field of mineral deposit research. Hayba et *** Hedenquist classified the epithermal systemas adularia-sericite or acid-sulphate types, and low sulphidation or high sulphidation types, *** low temperature mineralization, which was exemplified by the deposits in southwest China, refers tothe system at temperature mainly less than 200℃. Besides the distinction in temperature, however, thereexist many differences between epithermal and low temperature mineralizations.

关键词： epithermal mineralization low temperature.

南岭中生代陆壳重熔型花岗岩类成岩—成矿的时间差及其地质意义

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地质论评 2005年第6期51卷 633-639页

作者：华仁民成矿作用研究国家重点实验室

南岭地区陆壳重熔型花岗岩类的成岩作用与相关的成矿作用之间存在着明显的时间差,主要表现为3种情况:①南岭地区大部分'花岗岩型'铀矿床的花岗岩成岩时间是印支期,但铀的成矿作用主要发生在燕山晚期,其间存在着巨大的时间差;②在燕山中... 详细信息

南岭地区陆壳重熔型花岗岩类的成岩作用与相关的成矿作用之间存在着明显的时间差,主要表现为3种情况:①南岭地区大部分'花岗岩型'铀矿床的花岗岩成岩时间是印支期,但铀的成矿作用主要发生在燕山晚期,其间存在着巨大的时间差;②在燕山中期第一阶段(170～150 Ma)达到高潮的陆壳重熔型花岗岩类,其相关的钨锡等稀有金属矿化多发生在燕山中期第二阶段(150～139 Ma),成岩与成矿相差十几百万年;③燕山晚期许多浅侵位的花岗质岩体与相关的锡、铀矿化之间也存在明显的时间差.这一时间差反映了成岩作用与成矿作用之间在物质来源和地质构造背景等方面的差异,可能揭示了花岗岩与矿床在形成机制上的根本性差异.南岭地区大规模金属成矿作用主要与拉张的动力学背景、壳-幔相互作用、高的热流值,以及深部流体的参与密切相关.

关键词：陆壳重熔型花岗岩成岩作用成矿作用时间差地幔流体南岭

Zircon U-Pb dating confirms existence of a Caledonian scheelite-bearing aplitic vein in the Penggongmiao granite batholith, South Hunan

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Chinese Science Bulletin 2011年第19期56卷 2031-2036页

作者： ZHANG WenLan WANG RuCheng LEI ZeHeng hua renmin ZHU JinChu LU JianJun XIE Lei CHE XueDong ZHANG RongQing YAO Yuan CHEN Jun School of Earth Sciences and Engineering State Key Laboratory for Mineral Deposits Research Nanjing University Nanjing 210093 China South Hunan Geological Survey Chenzhou 423000 China

Granite at Penggongmiao is a large batholith in the Nanling Range, with an outcrop area of over 900 km 2 . There are many scheelite-quartz veins around the granite. LA-ICP-MS U-Pb dating was carried out for zircons from the granite. The middlecoarse-grained biotite granite has U-Pb ages of 435 to 436 Ma. Ages of 426.5±2.5 Ma were obtained for aplitic dyke cross-cutting the granite. The scheelite of magmatic origin in the aplite dyke was identified from petrographic investigation. This demonstrates that W-bearing granites of Early Paleozoic (corresponding to the Caledonian orogensis in the traditional sense) occur in the Nanling Range. This finding has important implications for the ore-forming potential of Paleozoic granites and on the extent of Mesozoic mineralization. Thus it merits performing an intensive study of Paleozoic granites in South China. The occurrences of aplite or microgranite may be an indicative of the Caledonian tungsten granites and associated W mineralization.

关键词：花岗岩基加里东期白钨矿年龄 Pb 锆石轴承静脉

关于花岗岩成因分类与花岗岩成矿作用若干基本问题的思考——与张旗先生等商榷

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矿床地质 2011年第1期30卷 163-170页

作者：华仁民内生金属矿床成矿机制研究国家重点实验室南京大学地球科学与工程学院江苏南京210093

针对《矿床地质》2010年第5期刊登的张旗等(2010)"花岗岩与金铜及钨锡成矿的关系"一文中关于花岗岩分类及其与成矿作用关系的若干重要问题提出质疑,认为该文按照花岗岩Sr和Yb的含量将花岗岩分为埃达克型、喜马拉雅型、浙闽型和南岭型4... 详细信息

针对《矿床地质》2010年第5期刊登的张旗等(2010)"花岗岩与金铜及钨锡成矿的关系"一文中关于花岗岩分类及其与成矿作用关系的若干重要问题提出质疑,认为该文按照花岗岩Sr和Yb的含量将花岗岩分为埃达克型、喜马拉雅型、浙闽型和南岭型4类的方案存在3个问题:一是埃达克岩不能作为花岗岩分类学中的一种类型;二是花岗岩的Sr、Yb含量没有明确无误的分类指示作用;三是喜马拉雅、浙闽和南岭等几个地名未能包含和正确地代表所有的花岗岩。文章指出与花岗岩类有关的钨锡或金铜矿床主要属于热液矿床的范畴,因此与花岗岩具有密切的成因关系;与花岗岩有关的成矿作用一般与成岩同时或晚于成岩,但不可能早于成岩。文章列举了若干例子,证实金铜(铅锌银)和钨锡即使在一个矿床中共生也屡见不鲜,而并非如张旗等(2010)所说的"金铜和钨锡是相悖的"。文章还对该文关于矿液与岩浆有各自的上升通道、金的"一次来源"等问题提出了不同看法。

关键词：地质学花岗岩分类埃达克岩 Sr、Yb含量金铜钨锡成矿热液矿床