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The fluid mineralization characteristics of gold deposits in Jungger-East Tianshan mountains area,Xingjiang

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The fluid mineralization characteristics of gold deposits in...

First Meeting Asia Current Research on Fluid Inclusion

作者： lijuan wang, jingbin wang, yuwang wang, heping zhu, Lili Qu beijing institute of geology for mineral resources, beijing 100012, china key laboratory of mineral resources, institute of geology and geophysics, chinese academy of sciences, beijing 100029, china

The Junggar-eastern Tianshan area of Xinjiang Automous Region is situated at the northwestern part of china. Collisional orogeny in the area took place in the Carboniferous-Permian and underwent a history of contraction and subsequent extension. The gold, copper and nickel mineralization in the area also took place in the Carboniferous-Permian. Therefore, gold mineralization in the area coincides with the collisional orogeny in timing, distribution and geodynamic setting.

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A Preliminary Study on Fluid Inclusions and mineralization of Xitieshan Sedimentary-Exhalative (SEDEX) Lead-Zinc Deposit

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Acta Geologica Sinica(English Edition) 2008年第4期82卷 838-844页

作者： wang lijuan zhu Xinyou wang jingbin DENG Jiniu wang yuwang zhu heping beijing institute of geology for mineral resources Beijing 100012 China key laboratory of mineral resources Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Western Mining Corporation Ltd. Xining 830001 China

The Xitieshan lead-zinc deposit is located at the northern margin of the Qaidam Basin, Qinghai Province, china, and had developed a complete marine sedimentary-exhalative system. Our preliminary study of ore-forming fluids shows that fluid inclusions in quartz from altered stockwork rocks that represent the pipe facies have a wide range of temperature and salinity. The intense fluid activities are characteristics of the pipe facies of the exhalative system. Fluid inclusions in carbonates near the unstratified ore bodies hosted in the thick-bedded marble which represents vent-proximal facies are large in size and have moderate to high temperatures. They represent unerupted sub-seafloor fluid activity. Fluids in altered stockwork rocks and carbonates have similar H20-NaCI-CO2 system, both belonging to the sedimentary-exhalative system. The fluids migrate from the pipe facies to the unstratified ore bodies. Boiling of the fluids causes the separation of CO2 vapor and liquid H2O. When the fluids migrate into the unconsolidated thick-bedded marble, the escape of CO2, decreasing temperature and pressure as well as some involvement of seawater into the fluids result in the unmixing of fluids with high and low salinity and deposition of ore-forming materials. The two unmixed fluids were trapped in unconsolidated carbonates and the ore-forming materials were deposited in the unconsolidated carbonates to form the sedimentary-exhalative type unstratified ore bodies. The oreforming temperature of unstratified ore bodies is up to high temperature indicating that there is a huge ore-forming potential in its deep.

关键词： sedimentary-exhalative system pipe facies unstratified ore bodies fluid inclusions the Xitieshan lead-zinc deposit

Ore-forming fluid and mineralization of Caijiaying and Dajing polymetallic ore deposits

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Ore-forming fluid and mineralization of Caijiaying and Dajin...

中国科学院地质与地球物理研究所2004学术年会

作者： wang lijuan~(1,2),wang jingbin~(1,2),wang yuwang~(1,2) & zhu heping~1 1.key laboratory of mineral resources,institute of geology and geophysics,chinese academy of sciences,beijing 100029,china 2.beijing institute of geology for mineral resources,beijing 100012,china

Fluid inclusions from the Dajing and Caijiaying deposits have nearly the same homogenization *** between temperature and salinity shows that both Snand Cu-bearing fluids Sn and Cu were present in the Dajing deposit but only one kind of fluids continuously evolved in the Caijiaying *** on rare earth elements(REE) in ancient fluid from the inclusions indicates that the fluid of Sn mineralizing stage in Dajing was derived from remelting magma of the continental crust,and the fluid of Cu-Pb-Zn mineralizing stage in the Dajing deposit and the fluid of Cu-Pb-Zn mineralization in the Caijiaying deposit were derived from the *** is concluded that the Cu-Pb-Zn mineralizations in the Dajing and Caijiaying deposits resulted from the identical tectono-thermal event of magma-fluids induced by Mesozoic tectonic transition and extension in the eastern part of North china Craton.

关键词： Caijiaying Dajing Mesozoic tectonic transition ore-forming fluid REE

Ultramafic xenoliths in Mesozoic diorite in west Shandong Province

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Science china Earth sciences 2004年第6期47卷 489-499页

作者： CHEN Lihui1,2 & ZHOU Xinhua2 1.The key laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,china and School of Earth and Space sciences,Peking University,beijing 100871,china 2.institute of geology and geophysics,chinese academy of sciences,beijing 100029,china Correspondence should be addressed to Chen Lihui(email: lihui_chen@***) The key laboratory of Orogenic Belts and Crustal Evolution Ministry of Education China and School of Earth and Space Science Peking University Beijing China institute of geology and geophysics Chinese Academy of Sciences Beijing China

Ultramafic xenoliths are common in Tietonggou intrusion, Laiwu, Shandong Prov-ince. Peridotite xenoliths develop two-stage metasomatism popularly: (i) The early metasoma-tism is characterized by intergranular clinopyroxene and phlogopite; (ii) The later metasomatism is characterized by orthopyroxene veins with a few plagioclases and amphiboles. These ul-tramafic xenoliths are thought to be mostly from the crust-mantle transitional zone on the basis of their combination, mineral chemistry, equilibrium temperature, and metasomatic characteristics. Major elements, rare earth elements, and Sr-Nd isotopic composition of the ultramafic xenoliths indicate that there is a petrogenetic relationship between the silica-enriched xenoliths and their host diorites. We propose that such silica enrichment might be an indicator of melt-rock interac-tions in the Mesozoic lithosphere beneath western Shandong.

关键词： ultramafic xenoliths, crust-mantle transitional zone,metasomatism, Tietonggou intrusion, Laiwu.

Prediction of Hidden Ore Bodies using Integrated geology,Source of Fluids and Stratagem EH4 Geophysical Survey in Kuoerzhenkuola Gold Deposit in Xinjiang,china

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Prediction of Hidden Ore Bodies using Integrated Geology,Sou...

中国科学院地质与地球物理研究所2008学术年会

作者： Ping SHEN,Yuanchao SHEN,Tiebing LIU,heping zhu,lijuan wang, Qingdong ZENG and Guangming LI key laboratory of mineral resources,institute of geology and geophysics,chinese academy of sciences,beijing,china

The Kuoerzhenkuola gold deposit is located in the Sawur gold belt in Xinjiang,*** integrated geological, geochemical and geophysical investigation was carried out in the Kuoerzhenkuola gold deposit,to determine the extension of the principal mineralized system,in the search for new ***-examination of the rocks and structures in the Kuoerzhenkuola area showed that the study area features an elliptical caldera where the gold deposit lies.A re-investigation of the mine geology found that the mineralization at the Kuoerzhenkuola gold deposit is not controlled by the EW-striking regional fault as previously assumed,but by a caldera fracture system locally superimposed by regional faults;the host rocks are andesites and dacites of the Carboniferous Heishantou Group rather than the crypto-explosive breccia of the Devonian Sawurshan *** components of fluid inclusions from quartz,trace element chemistry of pyrite and fluid inclusions in pyrite,Pb isotopes of pyrite,and whole-rock geochemistry and Pb isotopes of the country rocks are used to study the source of fluids at Kuoerzhenkuola gold *** ore-forming fluids are characterized by low-moderate temperatures and low salinities estimated from fluid inclusion *** mass spectrometry indicated a CO-bearing *** coupled plasma-mass spectrometry of the fluid inclusions indicated high Cu (average 70 ppm) for the Au mineralization,whereas the host rocks have low Cu(average 33 ppm),indicating that Cu of the ore-forming fluids originated from magmatic fluid rather than the volcanic *** isotopes of ores and host volcanic rocks indicate a similar,mixed source and some Pb could be sourced from the *** implied that magmatic fluids could play an important role in the Au mineralization *** new geological findings and the fluids derived mainly from the magmatic fluids suggest that the ore-forming fluids originate at depth,and are transported and precipi

关键词： gold mineralization prediction of hidden ore bodies source of fluids Stratagem EH4 Xinjiang.

Methane-rich fluid evolution of the Baogutu porphyry Cu-Mo-Au deposit,Xinjiang,NW china

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Methane-rich fluid evolution of the Baogutu porphyry Cu-Mo-A...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Ping Shen~(a,*),Yuanchao Shen~a,jingbin wang~(a,b),heping zhu~a,lijuan wang~(a,b),Lei Meng~(a,b) a key laboratory of mineral resources,institute of geology & geophysics,chinese academy of sciences,P.O.Box 9825,beijing 100029,china b china Non-ferrous Metals Resource Geological Survey,beijing 100012,china

Baogutu is the first porphyry Cu-Mo-Au deposit discovered in Western Junggar,Xinjiang,NW *** ore-bearing intrusion is a dioritic intrusive complex that includes stage 1 diorites and minor stage 2 diorite *** stage 1 diorites have produced concentric potassic and propylitic alteration zone and overprinted phyllic alteration and host much of the Cu-Mo-Au mineralization at *** Baogutu porphyry Cu-Mo-Au deposit consists of unusually disseminated and minor vein-style mineralization. The fluid evolution occurred in stage 1 diorite from late magmatic stage to hydrothermal stage(stages 1B and 1C) is constructed based on alteration and fluid inclusion analysis by microthermometry,Raman Spectroscopy and Quadrupole Mass Spectrometer. Five fluid types are distinguished and they are L1(liquid-rich 2-phase),L2(liquid-vapor 2-phase),V1 (vapor-rich 2-phase),V2(mono-phase vapor),and H(multi-phase solid).The dominant inclusions rich in reductive CH plus HO while minor inclusions rich in CH and *** inclusions in quartz from the late magmatic stage contain the most brine inclusions and less other inclusions with CH-rich and HO-rich *** inclusions in quartz from stage 1B contain all fluid types and have CH-rich and CH + HO compositions with rare *** inclusions in quartz from stage 1C are characterized by more vapor inclusions without brine inclusions and a clear CO concentration in a few assemblages with CH + CO composition. Using microthermometry,we estimate fluid trapping conditions at T>400℃and P= 1500 to 3100 bar in late magmatic stage,T= 200 to 400℃and P = 50 to 320 bar in disseminated quartz in stage 1B,T= 180 to 400℃and P = 20 to 260 bar in vein quartz in stage 1B,and T= 170 to 400℃and P = 20 to 230 bar in stage *** late magmatic conditions are compatible with the fluid evolution as a result of CH-rich inclusions derived from mantle *** hydrothermal conditions in stages 1B and 1C with small P-T fluctuations are compatible wit

关键词： Methane-rich fluid inclusions The Baogutu porphyry Cu-Mo-Au deposit Western Junggar Xinjiang

Zircon SIMS U-Pb Age of the Shaxinan Melagabbro, Eastern Tianshan and Constraints on Fe-Ti-V Oxide mineralization

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2039-2040页

作者： SHI Yu wang yuwang wang jingbin MAO Qigui XIE Hongjing ZHOU Guochao zhu Jiangjian WEI Xiaofeng Lü Xiaoqiang beijing institute of geology for mineral resources Beijing 100012 China School of Earth sciences and resources China University of Geosciences Beijing 100083 China

Objective The late Paleozoic Fe-Ti-V oxide deposit of the eastern Tianshan is an important orthomagmatic deposit type in the Central Asia Orogenic Belt （CAOB）. A series of Fe-Ti -V oxide deposits and mineralized mafic-ultramafic intrusions have been recognized recently, such as those in Hongliangzi, Weiya, Yaxi, Shaxinan and Shaxi on the Central Tianshan massif, and Niumaoquan on the southern margin of the Harlik belt （Shi et al., 2018a）. Only a few Fe -Ti-V oxide deposits in the eastern Tianshan （e.g., Weiya and Niumaoquan） have been studied, and their chronology need to be further constrained for study of regional Fe-Ti- V oxide metallogenic mechanism and variation of mantlederived magmas during the orogenic process.

关键词： Pb Zircon SIMS U-Pb Age of the Shaxinan Melagabbro Fe Ti

柴北缘青山造山型金-铅矿床成矿机制:矿石和黄铁矿组成约束

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岩石学报 2024年第6期40卷 1712-1732页

作者：张志超龙灵利杨立强王玉往祝新友童海奎李顺庭马财北京矿产地质研究院有限责任公司有色金属矿山深部资源勘查工程技术研究中心北京100012 中国地质大学地质过程与矿产资源国家重点实验室深时数字地球前沿科学中心北京100083 中色紫金地质勘查(北京)有限责任公司北京100012 青海省地质调查局西宁810001

青山金铅矿床位于柴北缘滩间山矿集区内,是全球罕见的金-铅共/伴生的造山型矿床。矿体主要赋存于古元古代达肯大坂群片岩中,受到北西西向断裂控制,发育蚀变岩和石英脉两种矿石类型,矿石中硫化物较为发育,常见黄铁矿、褐铁矿、方铅矿、... 详细信息

青山金铅矿床位于柴北缘滩间山矿集区内,是全球罕见的金-铅共/伴生的造山型矿床。矿体主要赋存于古元古代达肯大坂群片岩中,受到北西西向断裂控制,发育蚀变岩和石英脉两种矿石类型,矿石中硫化物较为发育,常见黄铁矿、褐铁矿、方铅矿、黄铜矿、闪锌矿等。黄铁矿作为该矿床的主要载金矿物,其地球化学特征可以指示金赋存状态,揭示成矿流体性质和矿床成因。为此,选取ZK2103和ZK3701钻孔中不同深度空间的矿石和围岩样品,分别进行成矿元素全岩测试和黄铁矿的电子探针分析工作。矿石和围岩稀土元素配分模式曲线都为右倾型,呈现明显的Eu负异常,未见Ce异常,说明成矿流体为变质流体且不含海水。矿石相对富集Au、Ag、Cu、Pb、Zn、As、Co、Bi、Sb、W、Ni、Sr、Cd、V元素,而Sn、Mo、Cr元素含量则相对偏低。矿石和围岩中黄铁矿的S/Fe值小于2.0,表现出亏S和富Fe的特征;黄铁矿的Au/Ag值均大于0.5,Co-Ni图解结果指示黄铁矿为热液成因。金主要以纳米粒子形式赋存,少量以固溶体形式存在。金在流体中以Au(HS)-2的形式运移,流体混合作用破坏了Au(HS)-2的稳定性,致使金的沉淀。高硫的成矿流体可以运移部分的铜、铅、锌。在金沉淀后,成矿流体温度和压力降低,致使铅开始沉淀。但由于该流体运移铅、锌的能力有限,青山金铅矿床铅矿体的规模较小。硫-铅同位素结果显示成矿物质来源于围岩,区域上金龙沟矿区和青龙沟矿区围岩中铅锌含量较低,所以未形成铅矿体。

关键词：成矿元素特征成矿机制造山型矿床青山金铅矿床柴达木北缘