Oxygen isotope and REE geochemistry of metamorphic veins within the Zhoutan Group, central Jiangxi Province  

作　　者：HU Gongren LIU Congqiang YU Ruilian YU Weihe LIU Yue 

机构地区：[1]Department of Environmental Science and Engineering, Huaqiao University, Quanzhou 362021, China [2]Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China

出　　处：《Chinese Journal Of Geochemistry》2011年第4期422-429,共8页中国地球化学学报

基　　金：supported jointly by the Ministry of Science and Technology of China (95-Pre-39);the Foundation of State Key Laboratory for Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences (SKLEG7021)

摘　　要：Geochemical studies on REE, trace elements and oxygen isotopes from metamorphic veins and their host metasedimentary rocks in the Zhoutan Group at two localities, Xiangshan and Yihuang, in central Jiangxi Province have been conducted in this paper. The results show that the metamorphic quartz veins inherited the REE and oxygen isotope geochemical characteristics from their host rocks, suggesting that the vein-forming fluids were derived from the host rocks. Additionally, fractionation degrees of the trace element pairs Zr-Hf, Nb-Ta, Y-Ho and U-Th in the veins are different from those of their host rocks. It is also indicated that the veins are the products of the fluids. The metamorphic veins within the Zhoutan Group metasedimentary rocks were formed principally as a result of lateral diffusion of the metamorphic fluids.Geochemical studies on REE, trace elements and oxygen isotopes from metamorphic veins and their host metasedimentary rocks in the Zhoutan Group at two localities, Xiangshan and Yihuang, in central Jiangxi Province have been conducted in this paper. The results show that the metamorphic quartz veins inherited the REE and oxygen isotope geochemical characteristics from their host rocks, suggesting that the vein-forming fluids were derived from the host rocks. Additionally, fractionation degrees of the trace element pairs Zr-Hf, Nb-Ta, Y-Ho and U-Th in the veins are different from those of their host rocks. It is also indicated that the veins are the products of the fluids. The metamorphic veins within the Zhoutan Group metasedimentary rocks were formed principally as a result of lateral diffusion of the metamorphic fluids.

关 键 词：稀土元素地球化学 变质沉积岩 氧同位素 周潭群 江西中部 同位素地球化学特征 微量元素 化学研究 

分 类 号：P618.51[天文地球—矿床学] P588.2[天文地球—地质学]