Sm-Nd isotope study and dating on Honguleleng ophiolite in Xinjiang, China  

作　　者：Zhangdong Jin Jianhua Huang Fuchun Li 

机构地区：[1]Nanjing Univ, State Key Lab Res Mineral Deposits, Nanjing 210093, Peoples R China

出　　处：《Chinese Science Bulletin》1999年第20期1914-1917,共4页

摘　　要：A study of the Sm-Nd isotope composition of Honguleleng ophiolite in Xinjiang, China, isochron age ((626±25)Ma),εNd(t) = 8.40,and its model age (TNdDM) in the range of 1 180-1 208 Ma, indicates that the ophiolite was formed in the late stage of the Upper Sinian. In combination with its facies association, petrochemistry, REE patterns, trace elementsA study of the Sm-Nd isotope composition of Honguleleng ophiolite in Xinjiang, China, isochron age ((626±25)Ma),εNd(t) =8.40,and its model age (T DM Nd ) in the range of 1 180–1 208 Ma, indicates that the ophiolite was formed in the late stage of the Upper Sinian. In combination with its facies association, petrochemistry, REE patterns, trace elements and associated chromites orebodies, it is believed that the Honguleleng ophiolitic magma derived from the LREE-enriched, self-depleted mantle source and formed at paleo-ocean ridge. This ophiolite is a relic of an oceanic crust within the collision zone.

关 键 词：OPHIOLITE SM-ND ISOCHRON age Honguleleng Xinjiang. 

分 类 号：P597[天文地球—地球化学]