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Pure CO_(2) fluids in the Sarekoubu gold deposit at southern margin of Altai Mountains in Xinjiang,West China

Chinese Science Bulletin 2005年第4期50卷 333-340页

作者： XUJiuhua DINGRufu XIEYuling ZHONGChanghua YUANXu departmentofresourceengineering UniversityofScienceandTechnologyBeijingBeijing100083China BeijingInstituteofGeologyforMineralResources Beijing100012China

Sarekoubu gold deposit occurs in metamor- phosed acid volcanic rocks and volcaniclastic rocks of Devo- nian Kangbutiebao Formation along the southern margin of Altai Mountains in Xinjiang, West China. Pyritization, silici- fication and carbonatization are developed in wallrocks, and main gold mineralization stages are pyrite-quartz stage (Ⅱ) and polymetallic sulfide stage (Ⅲ). Primary fluid inclusions are often seen in main gold mineralization stages, which are almost pure CO2 liquid inclusions (LCO2) under room tem- perature with high densities of 0.85—1.07 g/cm3. CO2-rich inclusions (LCO2-LH2O) and H2O-rich inclusions (LH2O-LCO2) are subordinate. Fluid inclusions in stage Ⅰ (polymetallic sulfide stage) are more complex than in stage Ⅱ, containing CO2-CH4 system with ?78.1—?61.9℃of solid CO2 melting temperatures and ?33.7—?17.7℃ of partial homogenization temperatures. The trapping pressures of high densities are estimated to be 150—350 MPa. Laser Raman microprobe was used to confirm the composition of pure CO2 liquid in- clusions. δ C values of CO2 inclusions range from ?10.73‰ 13 to ?21.15‰, which are similar to some of fluids in the man- tle-derived minerals that contain surface organic carbon by subduction recycling. These characteristics differ from many hydrothermal gold deposits. CO2 fluids have a regiona source related to post-collisional orogeny.

关键词：阿尔泰山新疆二氧化碳有机碳流动性金沉积物变质酸火山岩矿物

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Rare earth elements in CO_2-fluid inclusions in mantle Iherzolite

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Journal of University of Science and Technology Beijing 2003年第3期10卷 8-12页

作者： JiuhuaXu YulingXie LijunWang HepingZhu LiquanWang departmentofresourceengineering UniversityofScienceandTechnologyBeijingBeijing100083China TheResearchCenterofMineralResourcesExploration InstituteofGeologyandGeophysicsChineseAcademyofSciencesBeijing100101China

Trace elements including REE (Rare Earth Elements) in fluid inclusions inlherzolite, olivine, orthopyroxene, and clinopyroxene have been determined by heating-decrepitationand ICP-MS (Element Type Inductively Coupled Plasma-Mass Spectrometry) method. Normalized CO_2fluid/chondrite data show that mantle fluids are rich in REEs, especially LREEs (Light Rare EarthElements), several times or dozen times higher than mantle rocks and mantle minerals. There areclose relationships among the REE data of olivine, orthopyroxene, clinopyroxene and *** to the data of chemical dissolution method, it is believed that REE data obtained fromheating-decrepitation and ICP-MS technique are contributed by CO_2 fluid inclusions. About 60percent (mass fraction) of tiny inclusions are observed not to be decrepitated above 1000 deg C, soREE data obtained are only contributed by decrepitated inclusions. Mantle fluids rich in LREE playan important role in mantle metasomatism, partial melting and mineralization.

关键词： rare earth elements fluid inclusions ICP-MS mantle lherzolite

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Visualizing Data Tree-Table Based on the Database

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Journal of China University of Mining and Technology 2001年第1期11卷 56-59页

作者：孙广义侯运炳李朝义张海波 departmentofresourceengineering HeilongjiangCollegeofScienceandTechnologyJixi158105P.R.China DepartmentofResourceExploitationEngineering CUMTBeijing100083P.R.China

The data tree table is a type of data structure consisting of data tree and table, which has a wide field of applications. The visual and dynamic growing algorithm of data tree table and its software method are presented based on the theory of the data structure and visual technology of software. The method of the expression and management of data tree table with relational mode are explored.

关键词： data tree table visualization algorithm

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