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Fluidization: An Important Process in the Formation of the Qiyugou Au-bearing Breccia Pipes in Central China

Acta Geologica Sinica(English Edition) 2007年第2期81卷 226-238页

作者： zhang yuanhou zhang Shihong Franco PIRAJNO College of Earth Sciences Jilin University Changchun Jilin 130061 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Geological Survey of Western Australia 100 Plain Street Perth WA6004 Australia

Fluidization processes based on experiments are reviewed to gain some useful insights and comparisons with those that occur in hydrothermal systems. Field and petrographic work, and microscope observation were carried out on samples from the Qiyugou Au-bearing breccia pipes from the East Qinling region, Henan Province. Evidence from macro- and micro-textures suggests that the style of breccias in the Qiyugou area can be grouped into three types：（1） jigsaw fit-stockwork texture, in which the interval between clasts is marked by fractures or filled with calcite or quartz veins; （2） larger breccias that are supported by smaller breccias, rock flour and alteration materials; in this type clasts moved over short distances, creating open spaces; （3） fluidized texture, where the clasts of different lithologies have rounded shapes. These observations are compared with those resulting from experiments on fluidization processes. The results of this comparison suggest that fluidization is an important geological process in the formation of the Qiyugou Au-bearing breccia pipes and gold mineralization. In addition, fluidization processes such as expansion, bubbling, slugging, channeling and spouting must have contributed to the formation of the pipes and were conducive to the development of gold mineralization. In the Qiyugou breccia pipes, gold mineralization occurs as disseminations, in stockwork veins, and open space infills. The ore zones form subparallel sheets that are nearly perpendicular to the walls of the pipes.

关键词： fluidization breccia pipe gold mineralization Qiyugou Cretaceous Henan Qinling China

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Evolution of the Mesozoic Granites in the Xiong'ershan-Waifangshan Region,Western Henan Province,China,and Its Tectonic Implications

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Acta Geologica Sinica(English Edition) 2007年第2期81卷 253-265页

作者： NAN Yigui zhang Shihong Franco PIRAJNO zhang yuanhou State Key Laboratory Geological Processes ana Minerat Resources China University of Geosciences Beijing 100083 China Geological Survey of Western Australia 100 Plain Street East Perth WA 6004 Australia The College of Earth Sciences Jilin University Changchun 130061 China

Based on the new data of isotopic ages and geochemical analyses, three types of Mesozoic granites have been identified for the Xiong＇ershan-Waifangshan region in western Henan Province： high-Ba-Sr I-type granite emplaced in the early stage （-160 Ma）, I-type granite in the middle stage （-130 Ma） and anorogenic A-type granite in the late stage （-115 Ma）. Geochemical characteristics of the high-Ba-Sr I-type granite suggest that it may have been generated from the thickened lower crust by partial melting with primary residues of amphibole and garnet. Gradual increase of negative Eu anomaly and Sr content variations reflect progressive shallowing of the source regions of these granites from the early to late stage. New ^40Ar/^39Ar plateau ages of the early-stage Wuzhangshan granite （156.0±1.1 Ma, amphibole） and middle-stage Heyu granite （131.8±0.7 Ma, biotite） are indistinguishable from their SHRIMP U-Pb ages previous published, indicating a rapid uplift and erosion in this region. The representative anorogenic A- type granite, Taishanmiao pluton, was emplaced at -115 Ma. The evolution of the granites in this region reveals a tectonic regime change from post-collisional to anorogenic between -160 Ma and -115 Ma. The genesis of the early- and middle-stage I-type granites could be linked to delamination of subducted lithosphere of the Qinling orogenic belt, while the late-stage A-type granites represent the onset of extension and the end of orogenic process. In fact, along the Qiniing -Dabie-Sulu belt, the Mesozoic granitoids in western Henan, Dabieshan and Jiaodong regions are comparable on the basis of these temporal evolutionary stages and their initial ^87Sr/^86Sr ratios, which may suggest a similar geodynamic process related to the collision between the North China and Yangtze cratous.

关键词： granite Mesozoic high Ba-Sr, ^40Ar/^39Ar dating post-collision anorogenic western Henan

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Single grain Rb-Sr dating of euhedral and cataclastic pyrite from the Qiyugou gold deposit in western Henan, central China

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Chinese Science Bulletin 2007年第13期52卷 1820-1826页

作者： HAN YiGui LI XiangHui zhang ShiHong zhang yuanhou CHEN FuKun State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Laboratory for Radiogenic Isotope Geochemistry Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China The College of Earth Sciences Jilin University Changchun 130061 China

The Rb-Sr isotopic dating of pyrite mineral from ore deposits can directly provide mineralization age. However, many geological factors may affect the Rb-Sr isotopic system,which baffles application of this method. Employing ultra-low procedural blank Rb-Sr method,we have dated pyrites separated from the No. 4 breccia pipe of the Qiyugou gold deposit,western Henan Province. Single grains of euhedral pyrite crystal with few microcracks yield an isochron age of 126 ± 11 Ma, which represents time of the main mineralization stage of the deposit. Pyrite grains of cataclastic type show nevertheless scattered Rb-Sr isotopic composition and no reasonable isochron can be defined. Crystal morphology and mineral inclusion studies reveal that Rb and Sr of pyrite mineral probably are preserved mainly in biotite, K-feldspar, and sericite mineral inclusions. The dating results likely suggest that cataclastic pyrite is not suitable for the Rb-Sr dating due to modification of the Rb-Sr isotopic system by later hydrothermal activity of fluid.

关键词：硫化铁矿年代测定铷锶形成时间

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U-Pb Geochronology and Geochemistry of Stratiform Garnet from the Aqishan Pb-Zn Deposit,Eastern Tianshan,Xinjiang,NW China:Constraints on Genesis of the Deposit

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Acta Geologica Sinica(English Edition) 2022年第1期96卷 135-146页

作者： WEN Bin zhang yuanhou YANG Wanzhi DU Shangze WANG Peng LIU Jinwei CHEN Lei College of Earth Sciences Jilin UniversityChangchun 130061China Xinjiang Institute of the Geological Survey Urumqi 830000China Institute of Earth Sciences China University of Geosciences(Beijing)Beijing 100083China

The Aqishan lead-zinc deposit,located in the Jueluotag metallogenic belt of eastern Tianshan,Xinjiang,Northwest China,has a stratiform occurrence in the marine volcanic tuff of the Yamansu *** ore body has a typical double-layer structure,having a stratified,stratoid,lenticular upper part and a veined,stockwork-like lower *** occurrence of the upper orebody is consistent with that of the volcanic tuff wall *** ore minerals are mainly chalcopyrite,pyrite,sphalerite,galena and magnetite,the altered minerals mainly being silicified,such as sericite,chlorite,epidote,*** garnetized skarn,being stratiform and stratoid,is closely related to the upper part of the *** observations show that the limestone in the ore-bearing Yamansu Formation is not marbleized and ***,it is associated with the ferromanganese deposits in the marine volcanic rocks of the Yamansu *** geological features reflect the likelihood that the Aqishan lead-zinc deposit is a hydrothermal exhalation sedimentary *** results from the EPMA show that the garnet is mainly composed of grossular-andradite series,contents being in a range of 34.791-37.8%SiO_(2),32.493-34.274%CaO,8.454-27.275%FeO,0.012-15.293%Al_(2)O_(3),0.351-1.413%MnO,and lower values of 0.013-1.057%TiO_(2).The content of SiO_(2) *** and FeO ***_(2)O_(3) has a significant positive *** results of ICP-MS analysis for the garnet show that the REE pattern is oblique to right in *** total amount of rare earth elements is relatively low,ΣREE=71.045-826.52 ppm,which is relatively enriched for LREE and depleted for ***/HREE=8.66-4157.75,La_(N)/Yb_(N)=23.51-984.34,with obvious positive Eu and Ce anomalies(δEu=2.27-76.15,δCe=0.94-1.85).This result is similar to the REE characteristics of ore-bearing rhyolite volcanic rocks,showing that the garnet was formed in an oxidizing environment and affected by clear hydrothermal *** U-Pb isotopic dati

关键词： garnet LA-ICP-MS U-Pb dating hydrothermal exhalation sedimentary deposits garnet trace element geochemistry Aqishan Pb-Zn deposit

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Qiyugou auriferous breccia pipes: A low-sulphidation epithermal system linked with transition of tectonic regime from collisional compression to extension, Xiong ershan, Henan, China

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Global Geology 2021年第1期24卷 23-42页

作者： zhang yuanhou zhang Shihong Pirajno Franco College of Earth Sciences Jilin UniversityChangchun 130061China State Key Laboratory of Biogeology and Environmental China University of GeosciencesBeijing 100083China Geological Survey of Western Australia Perth WA6004Australia

The Xiong’ershan area,as a part of a metallogenic province in cetral China,contains substantial Leimengou porphyry molybdenite deposit,Qiyugou breccia gold deposits and vein gold deposit occurred in fault zone,as well as previously refer to as orogenic gold *** or nearby the Mesozoic porphyry granite,the typical porphyry deposit,much more breccia pipes and breccia gold deposit are developed in the *** this paper we focus on reporting preliminary results obtained from field,petrographic work on the Leimengou porphyry molybdenite and the Qiyugou breccia gold deposit,as well as laser Raman microspectroscopy and microprobe analyses carried out on samples from the Au-bearing Qiyugou breccia *** adularia-calcite assemblage is reported in these breccia gold *** stages of hydrothermal alteration,pervasive and vein,are *** first stage consists of the alteration of the breccia clasts and rock flour by actinolite,green biotite,epidote,chlorite and minor *** hydrothermal activity is likely to relate to the molybdenite mineralisation *** second stage is characterised by quartz veining and adularia and calcite filling *** ores associated with quartz,sericite,and minor calcite alteration occur in NE-trending fault that cut the first stage of *** adularia-calcite alteration is genetically associated with gold *** adularia-calcite assemblage in the area suggest that the Qiyugou pipes are of low-sulphidation epithermal in *** Qiyugou breccia pipes are coeval and spatially associated with the nearby Leimengou porphyry Mo deposit,which together conform to an alkalic mineralising *** propose a model for the development and evolution of the breccia pipes in conjunction with a model that describes the genesis of the porphyry Mo and auriferous breccia pipes as a unified magmatic-hydrothermal system,which is linked with transition from collisional compressional to extensional geodyn

关键词： breccia pipe low-sulfidation porphyry Mo magmatic-hydrothermal system Qiyugou

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A new type of Mo-bearing quartz vein by acid leaching:evidence from Dahu-Qinnan Mine,northern belt of the Xiaoqinling gold province,central China

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Global Geology 2020年第4期23卷 214-224页

作者： zhang yuanhou MAO Jingwen PIRAJNO Franco LI Zongyan QIAO Cuijie zhang Xiaomin HE Yue zhang Shuaimin College of Earth Sciences Jilin UniversityChangchun 130061China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 130037China Geological Survey of Western Australia Perth WA6004Australia Jinyuan Mining Industry Co. LtdLingbao472500 HenanChina

Dahu-Qinnan molybdenum deposit,located in the northern part of the Xiaoqinling gold province,belongs to the Xiaoqinling-Waifangshan sub-zone of the eastern Qinling Mo-W metallogenic belt,central *** mineralization is associated with Au-bearing quartz *** paper is based on field observations and PIMA analytical data on the occurrences,and details textures and alteration patterns of Mo-bearing quartz veins in Dahu-Qinnan *** Mo-bearing quartz veins exhibit friable with cream colored,vuggy,infilling texture and brecciated *** breccia clasts within Mo-bearing quartz veins are dominated by gneissic rocks of the Taihua Supergroup,and Mesozoic porphyritic granite dyke with stockwork and disseminated molybdenite *** breccias are replaced by clay *** associated with molybdenite-bearing quartz veins is characterized by K-feldspar(only in the breccias),sericite,sillicification(residual silica),kaolinite,smectite and *** with other sulfide minerals infills fissures and pore spaces in the quartz *** the results of above,and according to the observed geological events in the area and taking into account the geological setting,molybdenite-bearing quartz veins are likely to have been affected by late acid *** precursor porphyry Mo ore,associated with porphyry granite dyke formed probably at ca.245--211 Ma during the continent-continenl collision of Qinling orogeny.

关键词： Mo-bearing quartz vein porphyry molybdenum body acid leaching Mesozoic Dahu-Qinnan

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岩浆热液系统金矿床研究进展

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黄金 2005年第10期26卷 10-14页

作者：张元厚张世红中国地质大学地质和资源学院

众多研究资料表明了岩浆热液成矿系统发育于板块碰撞造山带环境,或形成于拉伸环境,或位于板内裂谷环境中。文中介绍国外近期对岩浆成矿系统的矿床类型,以及这些矿床所产出的大地构造环境、岩浆岩特征、矿化蚀变特征和成矿热液系统的认... 详细信息

众多研究资料表明了岩浆热液成矿系统发育于板块碰撞造山带环境,或形成于拉伸环境,或位于板内裂谷环境中。文中介绍国外近期对岩浆成矿系统的矿床类型,以及这些矿床所产出的大地构造环境、岩浆岩特征、矿化蚀变特征和成矿热液系统的认知和研究现状。对产于这些环境中的岩浆系统特征及其与之伴生的矿床类型的了解,对区域成矿带的划分和深部找矿勘探工作具有十分重要的意义。

关键词：岩浆热液成矿系统斑岩型矿床浅成低温热液型矿床

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新疆东天山觉罗塔格带中康古尔金矿床成因的再认识

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矿床地质 2020年第6期39卷 1103-1121页

作者：杜尚泽张元厚杨万志文斌王鹏吉林大学地球科学学院吉林长春130061 新疆地质矿产调查院新疆乌鲁木齐830000

东天山觉罗塔格构造带中康古尔金矿因其独特的成矿地质特征,成因一直备受争议。文章立足于康古尔金矿地质特征,结合前人的研究资料,通过探讨觉罗塔格带的构造演化,重新审视康古尔金矿的成因。笔者总结了觉罗塔格构造带晚古生代地层时代... 详细信息

东天山觉罗塔格构造带中康古尔金矿因其独特的成矿地质特征,成因一直备受争议。文章立足于康古尔金矿地质特征,结合前人的研究资料,通过探讨觉罗塔格带的构造演化,重新审视康古尔金矿的成因。笔者总结了觉罗塔格构造带晚古生代地层时代及火山-沉积建造特征,认为晚古生代早期大洋板块向北俯冲,发育奥陶纪—泥盆纪弧火山岩及火山-沉积岩系,石炭纪康古尔洋发生双向洋-陆俯冲,在两侧形成对称岛弧带,局部平稳拉张环境为铜-铅-锌-金成矿的有利环境。野外地质观察及室内研究结果表明其成因不仅仅与韧性剪切作用有关。康古尔金矿体位于海相安山岩、凝灰岩的交替部位,上部富金-中部铅锌-下部富铜的金属分带特征,与VMS矿床特征一致。矿体呈板状且与围岩截然接触,明显受挤压变形的网脉状矿化表明矿体形成早于韧性剪切作用。矿床地球化学特征表明,康古尔金矿成矿作用具有多期多阶段性。通过详细对比康古尔金矿和造山型金矿、小热泉子VMS铜矿的特征,笔者认为康古尔金矿具有原生VMS矿床的特征,并且被二叠纪韧性变形所改造,为喷流沉积-变质热液改造型富金多金属矿床。

关键词：地质学 VMS矿床含矿建造矿床成因康古尔金矿觉罗塔格带东天山

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辽宁省高校落实“阳光体育运动”的长效机制研究

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高等农业教育 2011年第3期 59-61页

作者：张元厚孔庆梅沈阳农业大学辽宁沈阳110866

研究采用问卷调查法等方法对辽宁省高校落实"阳光体育运动"的现状进行调查,提出存在的问题,分析存在问题的原因,提出制定一套适合辽宁省高校落实"阳光体育运动"的长效机制。

关键词：辽宁省高校阳光体育运动长效机制

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小秦岭地区大湖-秦南钼矿床矿化类型、Re-Os定年及找矿方向

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吉林大学学报（地球科学版） 2020年第3期50卷 815-824页

作者：张元厚刘金伟文斌杜尚泽屈文俊吉林大学地球科学学院长春130061 国家地质实验测试中心北京100037

小秦岭地区大湖-秦南钼矿床位于华北地台南缘,属于小秦岭-外方山成矿亚带。矿化类型可分为含钼次生石英岩型和细脉浸染型。含钼次生石英岩型矿石构造有角砾状构造、团块状构造、蜂窝状构造、细脉网脉状构造和块状构造;蚀变以细脉浸染状... 详细信息

小秦岭地区大湖-秦南钼矿床位于华北地台南缘,属于小秦岭-外方山成矿亚带。矿化类型可分为含钼次生石英岩型和细脉浸染型。含钼次生石英岩型矿石构造有角砾状构造、团块状构造、蜂窝状构造、细脉网脉状构造和块状构造;蚀变以细脉浸染状钾化、硅化、碳酸盐化、高岭土化、硬石膏化为特征。细脉浸染型矿化通常与花岗质岩石关系密切,偶尔也见于含钼次生石英脉边部的片麻岩中;蚀变通常为钾化、硅化、绢云母化和少量的黄铁矿化、高岭土化、碳酸盐化等。含钼次生石英岩型含有含钼花岗质岩石角砾。野外证据表明,含钼花岗质岩石向含钼次生石英岩内部表现为,含钼花岗质岩石角砾逐渐变小,并逐渐被含钼次生石英岩包裹,含钼石英脉增厚,高岭土化、硬石膏化增强。这一特征反映了二者之间的成因联系。两种矿化类型中获得的12件辉钼矿Re-Os模式年龄分别为(223.6±4.1)^(196.1±3.0)Ma以及(197.8±3.2)和(196.1±3.3)Ma,Re-Os同位素等时线年龄为(199+14/-25)Ma。这些年龄数据表明,该区的成矿作用发生于印支期或早燕山期。钼矿化时空上与花岗斑岩脉和正长斑岩一致,含钼花岗质岩石的矿化和蚀变样式与斑岩型矿床类似。辉钼矿中w(Re)为0.894×10^-6~2.964×10^-6,反映钼成矿物质来源于地壳。这一时期,区域上以碱性岩岩脉产出为特征,因此本区成矿作用形成于陆内伸展环境下,应注意找寻与印支期花岗质岩石有关的斑岩型钼矿床。

关键词： Re-Os定年印支期斑岩含钼次生石英岩大湖-秦南钼矿床小秦岭

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