湘东北—桂北中元古界岩石地球化学特征  

Geochemical Characteristics of Mesoproterozoic Rocks,Northeast Hunan-North Guangxi

作　　者：金文山[1] 赵风清[1] 王祖伟[1] 甘晓春[1] 

机构地区：[1]天津地质矿产研究所

出　　处：《广西地质》1998年第1期59-64,74,共7页Guangxi Geology

摘　　要：湘东北—桂北中元古代冷家溪群和四堡群的变玄武岩类显示过渡型拉斑玄武岩类的地球化学特征，变砂岩类和变泥岩类（绢云板岩类）显示大陆边缘的砂岩类和泥岩类的地球化学特征。根据岩石地球化学和沉积相（低密度流复理石建造）特征，推测湘东北冷家溪群和桂北四堡群主要形成于大陆边缘深水环境。The meta-basalts show the geochemical characteristics of the tholeiites of 'transitional type',and meta-sandstones and meta-argillites show ones of sandstones and argillites of the continental margin for Lengziaxi Group and Sibao Group.Accordign to the characteristics of the sedimentary facies (flysch foumation of low -flow )and geochemical characteristics of rocks,we infer that Lengjiaxi Group and Sibao Group mainly derived from the deep water environment (bathyal to abyssal facies )of the continental margin.

关 键 词：玄武岩 变质岩 岩石地球化学 中元古界 

分 类 号：P588.145[天文地球—岩石学] P588.3[天文地球—地质学]