Large selenium isotopic variations and its implication in the Yutangba Se deposit, Hubei Province, China  

作　　者：WEN HanJie Jean CARIGNAN HU RuiZhong FAN HaiFeng CHANG Bin YANG GuangShu 

机构地区：[1]State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China [2]CRPG-CNRS, 15, Rue Notre-Dame des Pauvres, B. P. 20, 54501, Vandoeuvre-les-Nancy Cedex, France

出　　处：《Chinese Science Bulletin》2007年第17期2443-2447,共5页

基　　金：Supported by "West Light" of Chinese Academy of Sciences, Guizhou Natural Science Foundation, Knowledge Innovation Programme of Chinese Academy of Sciences (Grant Nos. KZCX3-SW-125 and KZCX2-102)

摘　　要：The selenium isotopic ratios have been measured in the Yutangba Se deposit, Hubei Province, China. The results show that the δ 82/76SeNIST values vary from -12.77‰ to 4.93‰, which is the largest Se iso- topic variation found so far in natural terrestrial samples. The sample Ytb-5 of high-selenium carbona-ceous shale has the lightest Se isotopic composition with a δ 82/76SeNIST value of -12.77‰. On the basis of variations of Se isotope in the deposit along with other geological and geochemical evidence, the "redox model" is suggested to favor the explanation of the occurrence of native Se in the deposit. The application to the Yutangba Se deposit with the discovery of large Se isotopic fractionation for natural samples indicates the potential of Se isotope as a new geochemical tracer.The selenium isotopic ratios have been measured in the Yutangba Se deposit, Hubei Province, China. The results show that the δ^82/76SeNIST values vary from -12.77‰ to 4.93‰, which is the largest Se isotopic variation found so far in natural terrestrial samples. The sample Ytb-5 of high-selenium carbonaceous shale has the lightest Se isotopic composition with a δ^82/76SeNIST value of -12.77‰. On the basis of variations of Se isotope in the deposit along with other geological and geochemical evidence, the “redox model” is suggested to favor the explanation of the occurrence of native Se in the deposit. The application to the Yutangba Se deposit with the discovery of large Se isotopic fractionation for natural samples indicates the potential of Se isotope as a new geochemical tracer.

关 键 词：中国 湖北 硒同位素 分馏法 黑色页岩 

分 类 号：P597[天文地球—地球化学]