Geochemical characteristics of the independent cadmium deposit, Niujiaotang, Duyun, Guizhou

查看全文 作　　者：LIU Tiegeng~1, YE Lin~1 and CHEN Guoyong~2 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;2. Team No. 104, Bureau of Geology and Mineral Resources, Duyun, Guizhou 558000, China 出　　处：《Chinese Science Bulletin》索引1999年第44卷第S2期,共3页 摘　　要：A large independent cadmium deposit has been found at Niujiaotang, Duyun, in recent years. To the bestof our knowledge this represents the first case of its kind in the world. With a reserve of over 5 000 tonsof cadmium, the deposit is unique in its high concentrations of cadmium which are tens of to over onehundred times higher than in ordinary cadmium mineralizations associated with Pb-Zn deposits. 1 Geological characteristics The Niujiaotang deposit is located at the southwest margin of the Yangtze Plate. The region consistsof a thick sedimentary cover ranging from Sinian to Triassic in age overlying unconformably the basementof Mid-Proterozoic metamorphosed volcanic-sedimentary rocks. Lower Cambrian carbonate strata arcoutcropped in the mining district. Cadmium mineralizations, with seven layers recognizable, are devel- 关 键 词：INDEPENDENT CADMIUM DEPOSIT mode of occurrence of CADMIUM inclusion fluid feature stable ISOTOPE geochemistry.