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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 LIAO 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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Origin and evolution of ore-forming fluid for the Gaosongshan gold deposit, Lesser Xing’an Range:Evidence from fluid inclusions,H-O-S-Pb isotopes

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Geoscience Frontiers 2019年第5期10卷 1961-1980页

作者： Yang Liu Jinggui Sun Jilong Han Liang Ren Alei Gu Keqiang Zhao Changshen Wang College of Earth Science Jilin UniversityChangchun 130061China Tianjin Center of geological Survey China Geological SurveyTianjin 300170China Geophysical and Geochemical Prospecting Academy Chinese Academy of Geological SciencesLangfang 065000China team 707 Heilongjiang Bureau of Geological Exploration for Nonferrous MetalsSuihua 152000China

Epithermal gold deposits are typical precious metal deposits related to volcanic and subvolcanic *** to the lack of direct geological and petrographic evidences,the origin of the ore-forming fluid is deduced from the spatial diagenesis-mineralization relationship,chronological data,physicochemical characteristics of mineral fluid inclusions,mineral or rock elements and isotopic geochemical *** objectively examining this scientific problem via a geological field survey and petrographic analysis of the Gaosongshan epithermal gold deposit,we recently discovered and verified the following points:(1) Pyrite-bearing spherical quartz aggregates (PSQA) occur in the rhyolitic porphyry;(2) the mineralization is structurally dominated by WNW- and ENE-trending systems and occurs mostly in hydrothermal breccias and pyrite-quartz veins,and the ore types are mainly hematite-crusted quartz,hydrothermal breccia,massive pyrite-quartz,etc.;(3) the alteration types consist of prevalent silicification,sericitization,propylitization and carbonation,with local adularization and *** ore minerals are mainly pyrite,primary hematite,native gold,and electrum,with lesser amounts of chalcopyrite,magnetite,sphalerite,and galena,indicating a characteristic epithermal low-sulfidation *** ore-forming fluid may have been primarily derived from magmatic fluid exsolved from a crystallizing rhyolitic porphyry *** zircon U-Pb geochronology,fluid inclusion,physicochemical and isotopic geochemical analyses revealed that (1) rhyolitic porphyry magmatism occurred at 104.6 ± 1.0 Ma,whereas the crystallization of the PSQA occurred at 100.8 ± 2.1 Ma;(2) the hydrothermal fluid of the pre-ore stage was an exsolved CO2-bearing H2O-NaCl magmatic fluid that produced inclusions mainly composed of pure vapor (PV),vapor-rich (WV) and liquid-rich (WL) inclusions with a small number of melt-(M) and solid-bearing (S) inclusions;mineralization-stage quartz contains WL

关键词： Fluid inclusions H-O-S-Pb isotopes Zircon U-Pb dating Gaosongshan gold deposit Lesser Xing'an Range Northeast China

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Microwave Sintering of Al_2O_3-ZrO_2-WC-Co Cermets

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 290-292页

作者：谷天本陆洪智 Faculty of Engineering China University of Geosciences Third geological Prospecting team Henan Geology and Mineral BureauLuoyang 471023China

Composite powders of nanocrystalline WC-10Co （15wt%）,Y2O3 （8mol%） stabilized nanocrystalline ZrO2 （30wt%）,industrial cobalt powder （4.5wt%） and submicron Al2O3 （55wt%） composite powders were fabricated by high-energy ball-milling *** nanocomposite powders were consolidated by microwave sintering process at temperature ranged 1300℃-1550℃ for 15min,*** optimum consolidation conditions,such as temperature,were researched during microwave sintering *** Hardness of the consolidated cermets was measured by using a Vickers indentation test,and density of specimens was also determined by Archimedes＇ *** sintering process could not only increase the density of Al2O3-ZrO2-WC-Co cermets and reduce the porosity,but also inhibit abnormal grain growth.

关键词： Al2O3-ZrO2-WC-Co cermets microwave sintering high-energy ball-milling

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Macroscopic polarization enhancement boosting piezo-photocatalytic performance via Nb-doping on B-site of Bi_(4)Ti_(3)O_(12)nanosheets

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Journal of Advanced Ceramics 2024年第4期13卷 437-446页

作者： Hongjian Yu Xindong Wei Min Wang Yan Zhang Zheng Wu Fan Guo Jie Han School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Engineering Research Center of Ministry of Education for geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Material Sciences and TechnologyChina University of Geosciences(Beijing)Beijing 100083China School of Environmental and Chemical Engineering Xi’an Key Laboratory of Textile Chemical Engineering AuxiliariesXi'an Polytechnic UniversityXi'an 710048China

The development of a high-performance ferroelectric piezo-photocatalyst is an efficient strategy for advancing sustainability within the environmental and energy ***,a major challenge lies in the creation of a strong polarized electric field that can effectively hinder charge recombination,both within the bulk and on the surface of ***,we synthesize a series of Nb-doped Bi_(4)Ti_(3)O_(12)nanosheets via a facile one-pot hydrothermal method to achieve synergistically enhanced piezo-photocatalytic performance in CO_(2)reduction and pollutant *** optimized doped Bi_(4)Ti_(3)O_(12)demonstrates remarkable efficiency in the conversion of CO_(2)into CO,with a high production rate of 72.7μmol∙g−1∙h−1 without using co-catalysts or any sacrificial agent,surpassing the performance of unmodified Bi_(4)Ti_(3)O_(12)by up to 4.69 ***,our catalyst demonstrates ultra-fast piezo-photocatalytic degradation of organic pollutant Rhodamine B(RhB)at low concentrations and exceptional piezo-photocatalytic activity at high concentrations,outperforming most previously reported state-of-the-art *** systematic corroboration of catalyst characterization and experimental analysis reveals that the synergistic effect arises from the amplified macroscopic polarization induced by lattice distortion caused by the larger Nb ions,thereby improving piezo-photocatalytic *** research thus offers valuable insights into the direct design and fabrication of versatile catalytic systems,with applications spanning CO_(2)valorization and beyond.

关键词： CO_(2)reduction dye degradation piezo-photocatalysis Nb-doped Bi_(4)Ti_(3)O_(12) macroscopic polarization regulation

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Geologic,Fluid Inclusion and Stable Isotope Constraints on Mechanisms of Ore Deposition at the Datuanshan Copper Deposit,Middle-Lower Yangtze Valley,Eastern China

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 746-765页

作者： CAO Yi DU Yangsong PANG Zhenshan DU Yilun KOU Shaolei CHEN Linjie GAO Fuping ZHOU Guibi State Key Laboratory of geological Processes and Mineral Resources China University of Geosciences Development and Research Center of China geological Survey No.321 geological team of Bureau of Geology and Mineral Resources Exploration of Anhui Province Tongling Nonferrous Metals Group Co. Ltd.

The Datuanshan deposit is one of the largest and most representative stratabound copper deposits in the Tongling area,the largest ore district in the Middle-Lower Yangtze River metallogenic *** location of the orebodies is controlled by the interlayer-slipping faults between the Triassic and Permian strata,and all the orebodies are distributed in stratiform shape around the Mesozoic quartz monzodiorite *** on field evidence and petrographic observations,four mineralization stages in the Datuanshan deposit have been identified：the skarn,early quartz-sulfide,late quartzsulfide and carbonate *** is the main copper mineral and mainly formed at the late quartz-sulfide *** inclusions at different stages were studied for petrography,microthermometry,laser Raman spectrometry and stable *** types of fluid inclusions,including three-phase fluid inclusions（type 1）,liquid-rich fluid inclusions（type 2）,vapour-rich fluid inclusions（type 3） and pure vapour fluid inclusions（type 4）,were *** minerals from the skarn,early and late quartz-sulfide stages contain all fluid inclusion types,but only type 2 fluid inclusions were observed at the carbonate *** observations suggest that most of the inclusions studied in this paper are likely *** coexistence of different types of fluid inclusions with contrasting homogenization characteristics（to the liquid and vapour phase,respectively） and similar homogenization temperatures（the modes are 440-480℃,380-400℃ and 280-320℃ for the skarn,early and late quartz-sulfide stages,respectively） in the first three stages,strongly suggests that three episodes of fluid boiling occurred during these stages,which is supported by the hydrogen isotope *** Raman spectra identified CH_4 at the skarn and early quartz-sulfide *** with other geological features,the early ore-forming fluids were inferred to be under a relatively reduced *** CO_2 component ha

关键词： Stratabound skarn deposit fluid inclusions stable isotopes Datuanshan deposit Middle-Lower Yangtze Valley

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Time domain method for calculating free field motion of a layered half-space subjected to obliquely incident body waves

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Earthquake Engineering and Engineering Vibration 2007年第2期6卷 191-196页

作者：李山有朱海燕高淑芳 Institute of Engineering Mechanics China Earthquake Administration Earthquake Administration of Fujian Province No.703 team of Bureau of geological Exploration of Nonferrous Metals of Heilongjiang Province

In numerical simulation of wave scattering under oblique incident body waves using the finite element method, the free field motion at the incident lateral boundary induced by the background layered half-space complicates the computational area. In order to replace the complex frequency domain method, a time-domain method to calculate the free field motion of a layered half-space subjected to oblique incident body waves is developed in this paper. The new method decouples the equations of motion used in the finite element method and offers an interpolation formula of the free field motion. This formula is based on the fact that the apparent horizontal velocity of the free field motion is constant and can be calculated exactly. Both the theoretical analysis and numerical results demonstrate that the proposed method offers a high degree of accuracy.

关键词： layered half-space wave scattering obliquely incidence artificial botmdary explicit finite element method Snell law

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Sm-Nd isochron age evidence for Precambrian metamorphic rocks from the eastern Junggar in northern Xinjiang, China

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Chinese Science Bulletin 1996年第22期41卷 1896-1899页

作者：张前锋胡霭琴张国新陈义兵聂勇郭德英 Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China No. 704 geological team BNGE Hami 839000 China

The characterstic of the basement of Junggar block has been a topic of *** on the data of gravity and magnetic anomaly,some researchers deduced thatthere were Precambrian basic-ultrabasic complex on the basement of Junggar ***,others maintained that the basement of Junggar block was probably the Paleozoicoceanic crust because of the lack of isotopic evidence and older outcrops aroundthe Junggar Basin. In recent years,molecules of fossil community were discovered from Aleandao Groupat the Qingshuiquan and Kamuster of eastern *** of the fossils,such asPylocorpus,Retincnlafopora,Asteropyla,were found at the boundary between Cambrianand Sinian in Qinling and South *** isotopic age of 1908 Ma for leuco-pink graniticgneiss from the lower Huangcaopo Group was gained by evaporated Pb-isotope method forsingle zircon in Xiaoluigou of eastern Junggar by Zhang et *** all of these results onlyindicate a possibility that the basement of Junggar block consists of

关键词： eastern Junggar Precambrian metamorphic rocks Sm-Nd age.

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Geology and Genesis of the Mafic-Ultramafic Complexes in the Huangshan-Jingerquan (HJ) Belt, East Xinjiang

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Chinese Journal Of Geochemistry 1995年第2期14卷 97-116页

作者：顾连兴诸建林郭继春廖静娟严正富杨浩王金珠 Department of Earth Sciences Nanjing University Nanjing geological team No. 6 Xinjiang Bureau of Geology and Mineral Resources Xinjiang

More than twenty mafic-ultramafic complexes. which host several medium-or large-sized Cu-Ni deposits, occur along the Huangshan-Jingerquan (HJ ) belt in EastXinjiang. Rock types in these complexes are predominated by peridotite, pyroxene peri-dotite, olivine pyroxenite, gabbronorite, orthopyroxene gabbro, troctolite, gabbro anddiorite. The ultramafic rocks are relatively Fe-euriched and are characterised by an as-semblage of olivine + orthopyroxene + clinopyroxene + hornblend ±plagioclase withoutobvious metamorphic textures. Chemically these complexes are relatively Fe-enrichedand show a tholeiitic trend of evolution. The complexes in this belt are intruded underthe extensional environment in a Mid-Carboniferous back-arc basin. They call be consid-ered as a new type of mafic-ultramafic complexes in orogenic belts, as designated by thename of the East-Xinjiang-type complexes.

关键词：地质学铁镁质超基性岩橄榄岩辉岩新疆

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Petrogenetic contrastive studies on the Mesozoic early stage ore-bearing and late stage ore-barren granites from the southern Anhui Province

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Science China Earth Sciences 2017年第11期60卷 1920-1941页

作者： YAN Jun HOU TianJie WANG AiGuo WANG DeEn ZHANG DingYuan WENG WangFei LIU JianMin LIU XiaoQiang LI QuanZhong School of Resource and Environmental Engineering Hefei University of TechnologyHefei 230009China Nanjing Institute of Geology and Mineral Resources China Geological SurveyNanjing 210016China 332 geological team of Bureau of Geology and Mineral Resources Exploration of Anhui Province Huangshan 245000China

Yanshanian magmatisms are intensive in the southern Anhui Province and can be divided into early （152-137 Ma） and late （136-122 Ma） stages. A Yanshanian granitic zone was found to crop out along Qingshan to Changgai areas in the Ttmxi district in Field investigation which has a genetic link with molybdenum multiple metal mineralization. To be a representative syenitic granite in the southern Anhui Province, the Huangshan pluton has not been found so far to have any genetic link with mineralization. Zircon LA-ICP-MS dating indicate that the four granitic bodies from the Qingshan-Changgai zone have concurrent formed ages from 140~：4 to 141~2 Ma, belonging to the Yanshanian early stage magmatism. However, the Huangshan granite is dated to be 12912 Ma, belonging to the Yanshanian late stage magmatism. The Qingshan-Changgai granites show high SiO2 and K20 contents, low P205 contents and middle A12O3 contents and are high-K calc-alkaline series metaluminum I-type granite. These rocks are characterized by enrichments in the large ion lithophile elements and light rare earth elements （REE）, depletions in the high field-strength elements, and middle degree negative anomalies of Eu, geochemical features of arc or continent crustal derived magma affinities. These rocks have 87Sr/StSr（t） ratios from 0.7120 to 0.7125,εNd（t） values from -7.24 to -4.38 and zircon εHf（t） values of -4.4 to 6.7, similar to that of the coeval ore-bearing granodiorites in the southern Anhui Province. Integrated geochemical studies indicate that the Yanshanian ore-bearing granodiorites were formed by partial melting of the Meso-Neoproterozoic accreted thickened low crust. Meanwhile, the Qingshan-Changgai granites were formed through a AFC process of plagioclase＋amphibole＋Shangxi Group of magmas that formed the ore-bearing granodiorites. The Huangshan granites are characterized by high SiOz and K2O contents, moderate Al2O3 contents, seagull shape REE distributed pattern and distinct Eu negative abnormiti

关键词： Yanshanian Granite Low crust Ore-bearing magmatic rock The south Anhui Province Jiangnan orogenic belt

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Geothermal resources formation conditions and preferred target areas in a certain county of Western Sichuan, China

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Journal of Groundwater Science and Engineering 2019年第1期7卷 61-69页

作者： LI Jun-ya WANG Yu-jue HE Xue-wen XUE Guo-dong XU Huan TIAN Yan-hong ZHAO Li-li CUI Qi-hang No.405 geological team Sichuan Bureau of Geology&Mineral Resources Exploration and Development

The geothermal resource is a form of "green" and renewable energy with huge development potential in terms of both environmental protection and economy. It was concluded that the exposed hot springs were mostly produced when fluids derived from atmospheric precipitation were heated deep and recurrently under the ground, developed banded geothermal reservoir in the pores of fault damage zones, fissure zones, hornification zones and dikes, and then moved upward with analyzing the geological and hydrogeological data as well as hydrochemical types of the naturally exposed hot springs in the studied region so as to ascertain the accumulation conditions of geothermal resources in a particular county in Western Sichuan and opt for suitable target areas for exploring geothermal resources. Four areas where geothermal resources are potentially located were proposed with analysis of their formation conditions based on this notion, and the "epsilon-shaped" structure in Zhimulin, the "epsilon-shaped" structure in Jiaochang, the vortex structure in Rewugou and the arcuate structure in Shidaguan were analyzed in this paper offering a reference for developing and exploiting the geothermal resources in the region as well as studying the development patterns of other hot springs in this region.

关键词： Geothermal resources geological structure Reservoir formation conditions

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