ON THE BANXI GROUP IN HUNAN
-
摘要: 本文以地层序列、年代地层格架、古地磁、岩浆岩—火山岩的地球化学及Ｓｍ－Ｎｄ同位素研究之成果，论证湖南板溪群属新元古代青白口纪原地—准原地沉积地层，不是“增生杂岩”或“洋壳残片”。湖南自早元古代陆壳形成以后，至中生代前没有洋盆发育阶段。Abstract: According to the study of the stratigraphic sequence , chronostratigraphic framework, palaeo-geomagnetism,geochemistry of magmatical rocks-voianic rocks and Sm-Nd isotopes,the authorsconsider that the Banxi Group in Hunan belings to the autochthonousquasi-autdhthonous de-posits of the Qingbaikou on period of Neoproterozoic and is not an aceretunary complex“or”,re-licts of oceanic crust. After the formation of Palaeoproterozoic comtinental crust,there doesn’t ex-ist the developmental stages of the pre-Mesozoic ocean basin.
-
-
计量
- 文章访问数: 119
- PDF下载数: 1
- 施引文献: 0
下载: