Helium-argon isotopic tracing for the Pb-Zn-Ag polymetallic ore deposits in the central-south segment of the Da Hinggan Ling Range

查看全文 作　　者：WANG [1]Baode;NIU [1]Shuyin;SUN [1]Aiqun;HU [1]Huabin;LIU [1]Yaming;GUO [2]Lijun;WANG [2]Shuo

机构地区：[1]Geological Survey Institute, Shijiazhuang University of Economics, Shijiazhuang 050031, China;[2]Inner Mongolia Bureau of Geology and Mineral Resources Exploration Development, Hohhot 010020, China

出　　处：《Chinese Journal Of Geochemistry》索引2008年第27卷第3期,共7页

摘　　要：In recent years big strides have been made in the exploration of ores in the central-south segment of the Da Hinggan Ling Range,though some debates still exist on the metallogenesis and sources of ore-forming materials.Pyrite and other sulfides in direct relation to the Pb-Zn-Ag ore deposits were chosen for the He and Ar isotopic analysis of ore-forming fluids,and the first He and Ar isotope data have been obtained from the study region.3He/4He ratios in 14 samples collected from 7 mining districts are 2.17×10-6-12.52×10-6,averaging 6.86×10-6 and their R/Ra ratios are 1.56-9.01 Ra,averaging 4.37 Ra.By projecting the data points onto the 3He-4He concentrations diagram,all the points fall near the mantle helium area.The calculated mantle-source helium ratios are within the range of 19.58%-76.96%,with an average of 49.52%.Argon isotopic characteristics are close to those of mantle source,indicating that the ore-forming material was transport upwards via the multi-stage evolution of mantle plume and concentrated as ores in the favorable loci of mantle branch structures. 关键词：氦氩同位素合成矿石材料沉积物地幔分支结构

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Helium-argon isotopic tracing for the Pb-Zn-Ag polymetallic ore deposits in the central-south segment of the Da Hinggan Ling Range

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引证文献(2)

耦合文献(107)

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