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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： QIFENG ZHOU kezhang qin DONGMEI TANG CHUNLONG WANG YE TIAN PATRICK ASAMOAH SAKYI Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Xinjiang Research Center for Mineral Resource Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences University of Chinese Academy of Sciences Department of Earth Science University of Ghana

The Koktokay No.3 pegmatite is the largest Li-Be-Nb-Ta-Cs pegmatitic rare-metal deposit of the Chinese Altai orogenic belt,and is famous for its concentric ring zonation pattern(nine internal zones)and rare-metal *** this paper,we present the results of major and trace element analysis for garnet,tourmaline,and beryl from the outer to inner zones of the No.3 *** previous studies on tourmaline and beryl,potential tracers of the degree of pegmatite evolution could be found by comparing with accepted indicators and evolutionary trends from the outer to inner zones of this *** Sc,Y,Li,Ta contents and Y/Ho value of garnet,together with the Ti,Ca,Na,Pb,Bi and REE contents of tourmaline,and the Fe,Ga and Rb concentrations of beryl could be possible tracers of the degree of evolution of *** textures and internal structures(homogeneity,oscillatory pattern,heterogeneous rims,replacement structures)of minerals in the pegmatite suggest that the rock underwent(1)rapid undercooling and crystallization after emplacement,resulting in the formation of an unidirectional solidification texture(UST),and then(2)became relatively stable,forming coarse crystals in outer zones,and finally(3)experienced disequilibrium crystallization,leading to the formation of complex internal structures of minerals in the inner zones,mainly caused by exsolution of more fluid and the formation of immiscible melts with different alkali *** evolutionary trend and the internal structures of tourmaline and beryl indicate that the formation of the Koktokay No.3 pegmatite was controlled mainly by fractional *** convex tetrad effect,nonCHARAC Y/Ho values,and extreme Eu depletion of garnet suggest that immiscibility,which is a significant mechanism during the formation of the No.3 pegmatite,occurred during *** differences in composition and internal structures of the minerals between the outer and inner zones of the No.3 pegmatite suggest

关键词： garnet tourmaline beryl EMPA LA-ICP-MS fractional crystallisation melt-fluid process Koktokay No 3 pegmatite Altai

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In situ LA-(MC)-ICP-MS trace element and Nd isotopic compositions and genesis of polygenetic titanite from the Baogutu reduced porphyry Cu deposit,Western Junggar,NW China

In situ LA-(MC)-ICP-MS trace element and Nd isotopic composi...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： MingJian Cao kezhang qin GuangMing Li Noreen J.Evans LuYing Jin Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences John de Laeter Center for Isotope Research Department of Applied GeologyCurtin University University of Chinese Academy of Sciences

Titanite(sphene,Ca Ti Si O5)is sensitive to changes in temperature,oxygen and water fugacity,and fluid *** order to understand formation processes and the nature of hydrothermal fluids,various types of titanite from Cu ores at the Baogutu reduced porphyry Cu deposit were chosen for detailed *** titanite is associated with biotite,plagioclase and K-feldspar,whereas hydrothermal titanite occurs with K-feldspar,chlorite,actinolite and *** formation of hydrothermal titanite was related to hydration of igneous minerals under high f H2O,whereas the widespread replacement of ilmenite by titanite(without magnetite)indicates a relatively low oxygen *** titanite has low Al,high Fe,Y,Sn,Zr,Nb and REE contents,relative to hydrothermal *** the basis of the Zr-in-titanite and Al-in-chlorite geothermometers,formation temperatures for magmatic and hydrothermal titanite are estimated to be 687–739°C and 250–670°C,*** gradual decrease in REE,Y and Sn contents from magmatic to late hydrothermal titanite was probably caused by precipitation of REE-bearing *** and hydrothermal titanites have similar chondrite-normalized REE patterns with negative Eu anomalies and relatively flat *** selected titanites have Nd isotopic compositions similar to the host ***,both magmatic and hydrothermal titanite are believed to have been predominantly derived from a mantle source.

关键词： Baogutu reduced porphyry Cu deposit Titanite Trace elements In situ Nd isotopes Zr-in-titanite geothermometer

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Types,characteristics,and time-space distribution of molybdenum deposits in China

Types,characteristics,and time-space distribution of molybde...

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中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： qingdong Zeng Jianming Liu kezhang qin Hongrui Fan Shaoxiong Chu Yongbin Wang Lingli Zhou Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences

Molybdenum exploration activity in China has accelerated tremendously during the past decade owing to the continuous. increasing demand for Earth *** possesses the largest Mo reserves in the world(exceeding 19.6 Mt).The major ore deposits are of porphyry,porphyry-skarn,skarn,vein,and sedimentary *** molybdenum deposits contain 77.5%of the Chinese Mo reserves,with lesser amounts in porphyry-skarns(13%),skarns(5.1%).and veins(4.4%). Exploitation of sedimentary-type molybdenum deposits thus far has been *** six Mo provinces are in the Northeast China,***-Dabie,middle-lower Yangtze River Valley,South China,and Sanjiang *** rec- ognize six ore-forming periods:(1)Precambrian(>541 Ma).(2)Palaeozoic(541-250 Ma),(3)Triassic(250-200 Ma), (4)Jurassic Early Cretaceous(190-135 Ma),(5)Cretaceous(135-90 Ma),and(6)Cenozoic(55-12 Ma).The abun- dance of Mo ore deposits in China reflects the occurrence of multiple periods of *** interactions between the Siberian,North China,Yangtze,India,and Palaeo-Pacific *** molybdenum deposits are related to Mesoproterozoic volcanism in an extensional *** Cu-Mo deposits are related to calc-alkaline granitic plutons in an island arc or a continental margin *** Mo deposits formed in the syn-collision postcollision tectonic set- ting between the Siberian and North China plates and between the North China and Yangzi *** Early Cretaceous molybdenum deposits formed along the eastern margin of Asia and are associated with the palaeo-Pacific plate-subduction tectonic *** Mo deposits are related to high-K calc-alkaline granitic rocks and formed in a lithospheric thin- ping *** molybdenum deposits formed in a collision setting between the Indian and Eurasian continents and the subsequent extensional setting.

关键词： molybdenum deposit six Mo ore-forming stages major metallogenic belt China

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Geochemistry and Petrogenesis of Granitoids at Sharang Eocene Porphyry Mo Deposit in the Main-Stage of India-Asia Continental Collision,Northern Gangdese,Tibet

Geochemistry and Petrogenesis of Granitoids at Sharang Eocen...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Junxing ZHAO kezhang qin Guangming LI Jinxiang LI Bo XIAO Lei CHEN Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

The Sharang porphyry Mo deposit is the first discovered Mo porphyry-type deposit in the Gangdese Metallogenic *** orebody is hosted by the Eocene multi-stage composite intrusive complex which is emplaced in the Upper Permian Mengla Formation and cut by the Miocene *** porphyry is recognized as the ore-bearing porphyry in the complex,which consists of quartz diorite,quartz monzonite,granite,prophyritic granite and post-mineral *** porphyry and dacite porphyry intrude the granite *** data indicate that Sharang complex has a High-K calc-alkalinc to shoshonitic,metaluminous to slightly peraluminous *** Sharang complex rocks are enriched in large ion lithophile elements,depleted in high-field strength elements,Nb,Sr,P and *** patterns show slight enrichments in light REE relative to heavy REE and weak negative Eu *** rocks in this complex have a wide range of initial Sr/Sr ratios(0.705605-0.712496) and lower ε(t) values(-0.61—7.80).The geochemical data suggest highly oxidized-evolved magma and old continental materials may have been the magma source for the Sharang intrusive complex that host porphyry Mo *** pre-ore and ore-forming rocks at Sharang may have formed by partial melting of mantle wedge and by mixing with old continental crust at the lower crust *** contrast the post-ore rocks may have formed by partial melting of enriched lithospheric mantle.

关键词： Eocene Gangdese metallogenic belt geochemistry porphyry molybdenum deposit Sharang Sr-Nd isotopes

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哈萨克斯坦环巴尔喀什斑岩铜矿地质与成矿背景研究

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岩石学报 2008年第12期24卷 2679-2700页

作者：李光明秦克章李金祥中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029

中哈萨克斯坦位于中亚造山带中部,是中亚型造山带及中亚斑岩铜矿成矿域的重要组成部分,已发现数十个大型和超大型矿床,成群成带分布。主要的斑岩铜矿类型有斑岩铜-金矿、斑岩铜矿、斑岩铜钼矿,大多具同期火山岩。已建立的热液蚀变分带... 详细信息

中哈萨克斯坦位于中亚造山带中部,是中亚型造山带及中亚斑岩铜矿成矿域的重要组成部分,已发现数十个大型和超大型矿床,成群成带分布。主要的斑岩铜矿类型有斑岩铜-金矿、斑岩铜矿、斑岩铜钼矿,大多具同期火山岩。已建立的热液蚀变分带模式具有碱性蚀变和酸性蚀变两个阶段,已有的硫铅同位素数据表明成矿物质来源于深部。该地区的斑岩铜矿形成与多阶段构造演化有关,早古生代的斑岩铜矿与岛弧演化的早阶段有关,而晚古生代的斑岩铜矿与泥盆纪火山—岩浆弧、石炭纪—二叠纪的火山—岩浆弧有关。从中哈萨克斯坦的北西向南东方向,斑岩铜矿的形成时代逐渐变年轻。虽然经过数十年的研究,但该地区的有关斑岩铜矿的精细时空结构仍未建立。因此,含矿斑岩体与蚀变矿化年龄的精确测定、区域成矿地球动力学背景及其演化、斑岩铜矿的精细时空结构、与中国邻区的构造—岩浆—成矿带的连接对比将是以后的研究方向。

关键词：斑岩铜矿地质特征成矿背景巴尔喀什中哈萨克斯坦中亚

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富金斑岩型铜矿床的基本特征、成矿物质来源与成矿高氧化岩浆-流体演化

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岩石学报 2006年第3期22卷 678-688页

作者：李金祥秦克章李光明中国科学院地质与地球物理研究所中国科学院矿产资源重点实验室北京100029

第三纪富金斑岩型铜矿床主要发育于板块汇聚边缘与俯冲作用相关的火山-岩浆弧以及陆缘弧中,而大多数较古老的富金斑岩型铜矿床则主要发育于向大陆边缘增生的岛弧环境中。含矿斑岩的岩性变化范围从低钾钙碱性闪长岩、石英闪长岩和英云闪... 详细信息

第三纪富金斑岩型铜矿床主要发育于板块汇聚边缘与俯冲作用相关的火山-岩浆弧以及陆缘弧中,而大多数较古老的富金斑岩型铜矿床则主要发育于向大陆边缘增生的岛弧环境中。含矿斑岩的岩性变化范围从低钾钙碱性闪长岩、石英闪长岩和英云闪长岩到高钾钙碱性石英二长岩到碱性的二长岩及正长岩,通常侵位于地壳浅部1～2km处,与同期的火山岩密切共生,并常见热液爆破角砾岩。其围岩蚀变从早到晚依次可分为Ca-Na硅酸盐蚀变、K硅酸盐蚀变、中级泥质蚀变、绢云母化、高级泥质蚀变,而浅部的高级泥质蚀变可以与早期K硅酸盐蚀变同期形成。Cu、Au矿化主要发育在K硅酸盐蚀变带中,矿化与A型脉密切相关,贫钼而富铂族元素。控制富金斑岩型铜矿床形成的几个关键过程包括:(1)源区有大量的Cu、Au等成矿元素;(2)能使Cu、Au等成矿物质有效进入岩浆熔体的机制;(3)合成矿元素的岩浆熔体在从地幔上升到地壳高侵位而形成斑岩体的过程中没有Cu、Au等成矿物质损失;(4)在岩浆上升演化过程中,岩浆挥发份能有效的逸出,并且逸出的时间越早,对成矿越有利;(5)Cu、Au等成矿元素能有效进入岩浆挥发份; (6)在成矿斑岩体上部发育有利的相对封闭机制,阻止岩浆挥发份的逃逸;(7)含Cu、Au成矿流体的有效沉淀机制; (8)具有一个地壳上部的岩浆房,能够不断提供成矿物质和驱动热液循环的热能。要形成大型矿床一般需要多期岩浆脉动侵位与多期矿化热液蚀变事件的叠加。现多倾向认为交代的地幔楔可能是其主要物质来源。而有利于富金斑岩型铜矿床形成的岩浆有钾质钙碱性岩浆、埃达克质岩浆、碱性弧岩浆。俯冲板片脱水形成的流体或者熔融产生熔体提供了上覆地幔楔熔融的高氧逸度条件,这种高氧逸度特征是地幔源区Cu、Au成矿元素能否进入岩浆熔体的重要条件之一。最近研究表明流体的冷却可能是Cu、Au沉淀成矿最主要的因素。本文扼要介绍了富金斑岩型铜矿的矿床地质特征、矿床成因等方面的研究进展,分析了存在的主要问题并对其发展趋势作了展望。

关键词：富金斑岩型铜矿蚀变组合岛弧钙碱性岩浆碱性岩浆交代地幔楔矿质来源富金成矿流体

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Petrogenesis and mineralization of the Hulu Ni-Cu sulphide deposit in Xinjiang,NW China:constraints from Sr-Nd isotopic and PGE compositions

Petrogenesis and mineralization of the Hulu Ni-Cu sulphide d...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Dongmei Tang kezhang qin Benxun Su Patrick Asamoah Sakyi Yajing Mao Shengchao Xue Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Department of Earth Science University of Ghana Xinjiang Research Centre for Mineral Resource Xinjiang Institute of Ecology and GeographyChinese Academy of Science Institute of Geology and Geophysics University of Chinese Academy of Sciences

The Permian Hulu intrusion is one of several sulphide-bearing Permian mafic-ultramafic intrusions in the eastern part of the eastern Tianshan located at the southern margin of the Central Asian Orogenic Belt(CAOB) in Xinjiang,NW *** intrusion is composed of lherzolite,olivine websterite,gabbro,and *** and net-textured Ni-Cu sulphide ores are located at the bottom of the lopolith *** Zr,Hf,Nb,and Ta anomalies,whole-rock εNd(t)values of+5.7 to +8.8,and variable(Th/Nb)values(from 1.06 to 8.13) suggest that the source of the Hulu complexes is depleted mantle metasomatized by subducted slab-derived fluid and/or melt(-5%global subducted sediment and 15%slab fluid) that has experienced approximately 3%lower crustal and 10%upper crustal *** Hulu intrusion is characterized by low PGE abundances i.e.0.03-1.08 ppb Ir,0.04-0.69 ppb Ru,0.02-2.15 ppb Rh,0.30-48.71 ppb Pt,and0.21-344 ppb *** calculations indicate that if the Pd,Os,Ir,and Cu contents of the primary magma were 2.1 ppb,0.03 ppb,0.05 ppb,and 200 ppm,respectively,a variable R-factor between 200 and 1600 with residual magma that had experienced 0.01%early-sulphide segregation can explain the variation in Pd,Os,and Ir contents of sulphide-poor and disseminated sulphide samples of the Hulu *** magma fractionation and assimilation and/or contamination of sulphur-bearing crustal materials might have triggered sulphur saturation to form Cu-Ni sulphide *** basaltic PGE contents cannot be used as the mineralized parent magma for the Hulu intrusion because of the differing evolutionary trends of the Ni/Pd and Cu/Ir ***,similar Cu/Ni and Pd/Ir values in Tarim basalts and Hulu Cu-Ni sulphide ores,as well as the same early sulphide segregation process,show that certain genetic relationships between them and magma sources are probably similar to each other.

关键词： Hulu magmatic sulphide deposit platinum-group elements early sulphide segregation crustal contamination Eastern Tianshan

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Geology and Hydrothermal Alteration of the Duobuza Gold-Rich Porphyry Copper District in the Bangongco Metallogenetic Belt,Northwestern Tibet

Geology and Hydrothermal Alteration of the Duobuza Gold-Rich...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Guangming LI Jinxiang LI kezhang qin Ji Duo Tianping ZHANG Bo XIAO Junxing ZHAO Key Laboratory of Mineral Resources Institute of Geology and GeophysicsCASBeijing

The Duobuza gold-rich porphyry copper district is located in the Bangongco metallogenetic belt in the Bangongco-Nujiang suture zone south of the Qiangtang *** main gold-rich porphyry copper deposits (Duobuza and Bolong) and an occurrence(135 Line) were discovered in the district The porphyry-type mineralization is associated with three Early Cretaceous ore-bearing granodiorite porphyries at Duobuza,135 Line and Bolong,and is hosted by volcanic and sedimentary rocks of the Middle Jurassic Yanshiping Formation and intermediate-acidic volcanic rocks of the Early Cretaceous Meiriqie *** emplacement and isometric distribution of three ore-forming porphyries is explained as multi-centered mineralization generated from the same magma *** hydrothermal alteration occurs in the porphyries and at the contact zone with wall *** main hypogene alteration zones are distinguished at ***-stage alteration is dominated by potassic alteration with extensive secondary biotite,K-feldspar and *** alteration zone includes dense magnetite and quartz-magnetite veinlets,in which Cu-Fe-bearing sulfides are *** alteration occurs in the host basic volcanic *** chloritization-silicification with quartz-chalcopyrite or quartz-molybdenite veinlets superimposes on the potassic ***-stage argillic alteration overlaps on all the ear Her *** alteration stage is characterized by destruction of feldspar to form illite,dickite and kaolinite,with accompanying veinlets of quartz + chalcopyrite + pyrite and quartz + pyrite assemblages. Cu coexists with Au,which indicates their simultaneous *** balance calculations show that ore-forming elements are strongly enriched during the above-mentioned three alteration stages.

关键词： Bangongco metallogenetic belt Duobuza porphyry copper district hydrothermal alteration mass balance mineralization northwestern Tibet

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Baogutu:An example of reduced porphyry Cu deposit in western Junggar

Baogutu:An example of reduced porphyry Cu deposit in western...

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中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Mingjian Cao kezhang qin Guangming Li Luying Jin Noreen J.Evans Xiangrong Yang Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences University of Chinese Academy of Sciences John de Laeter Center for Isotope Research Dept. Applied GeologyCurtin University College of Geology and Engineering of Exploration Xinjiang University

Classic oxidized porphyry copper deposits(OPCD) are characterized by high tonnage and elevatedfO and contain highly oxidized minerals including primary anhydrite and *** contrast,the Baogutu deposit contains abundant hypogene pyrrhotite and methane-rich fluid inclusions,characteristic of lower tonnage,reduced porphyry copper deposits(RPCD).Mineral paragenesis and mineral chemistry studies reveal two mineralization periods(magmatic and hydrothermal) with the hydrothermal period further subdivided into three paragenetic stages including Ca-Na alteration,potassic alteration and propylitization,locally overlapped by phyllic *** independent geothermometers indicate that the temperatures of the magma,potassic and propylitization alteration are estimated to be 600-900℃,200-400℃ and 200-300℃,*** indicators including mineral assemblages,apatite SO content,whole rock FeO/FeO ratios and fluid compositions indicate the fo of the magma and hydrothermal fluid to be NNO and NNO-NNO-2,*** fluids associated with primary biotite yield log(f/f) values of 4.8-6.2 for diorite and 4.1-4.5 for granodiorite *** logfof the magmatic and potassic alteration are estimated to be 0.7 to 3.0 and 5.5 to 11.0,respectively,based on pyrrhotite and sulfide *** assemblage and hessite composition suggest the logf of the potassic alteration is 8.5 to *** low tonnage Baogutu deposit displays significantly lower fo than OPCDs(>NNO+2),and,on this basis,could be classified as a *** physicochemical conditions including T,f,log(f/f do not show obvious differences to those of *** deduce that the low fo of Baogutu metallogenic granitoids and aqueous fluids likely produced the unusual pyrrhotite-arsenopyrite mineral assemblage,and the NaCl-HO-CH-COore-forming fluids and small tonnage typical of *** obtained fluid inclusion H-O isotope data and sulfide S-Pb isotope data suggest the methane-rich orefo

关键词： Reduced porphyry copper deposit Baogutu deposit Pyrrhotite Oxygen fugacity Methane

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平坦俯冲及其成矿效应的研究进展、实例分析与展望

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岩石学报 2011年第12期27卷 3727-3748页

作者：曹明坚秦克章李继亮中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院研究生院北京100039

平坦俯冲是指上覆大陆板块之下大洋板片低角度近水平俯冲(俯冲角度<10°),全球10%的俯冲带为平坦俯冲。前人研究表明,安第斯许多大型-超大型斑岩铜矿和浅成低温热液型金矿与平坦俯冲具有直接的成因联系。同时平坦俯冲对造山作用、地震... 详细信息

平坦俯冲是指上覆大陆板块之下大洋板片低角度近水平俯冲(俯冲角度<10°),全球10%的俯冲带为平坦俯冲。前人研究表明,安第斯许多大型-超大型斑岩铜矿和浅成低温热液型金矿与平坦俯冲具有直接的成因联系。同时平坦俯冲对造山作用、地震灾害、构造变形、壳幔相互作用等均具有重要的影响,因此开展平坦俯冲研究具有重要意义。本文主要从以下方面系统总结了平坦俯冲研究成果,包括平坦俯冲的主要表现、地质时期俯冲类型的转变、平坦俯冲的演化过程、平坦俯冲形成的可能机制,分析探讨平坦俯冲与增生型造山带之间可能联系、平坦俯冲与斑岩铜矿床的关系、以及平坦俯冲与洋中脊俯冲(板片窗)的区别,并介绍分析了北美Laramide造山带和华南中生代花岗岩带两个可能的平坦俯冲实例,最后给出平坦俯冲及其成矿效应的几点结论,并对我国今后开展相关研究提出了一些思考与展望,指出中亚造山带尤其是哈萨克斯坦巴尔喀什斑岩铜矿带及邻区和班公湖-怒江斑岩铜矿带构成两个潜在的古平坦俯冲发育区,斑岩铜矿极具潜力。

关键词：平坦俯冲俯冲类型斑岩铜矿增生型造山带

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