本文阐述了湖南新晃贡溪一带下寒武统"九门冲组"产出的灰岩透镜体岩石学及地球化学特征,初步分析研究显示为非正常沉积—壳幔混合热水喷流沉积成因,为区域上该时期相应壳幔混合热水成因矿产的寻找和沉积环境的研究与地层划分提供了新的资料及认识。
In this paper,the lithology and geochemistry characters of carbonate lens which occurred in Jiumenchong formation,Lower Cambrian is narrated,the analysis shows that the genesis is unusual sediment-crust-mantle mixed hydrothermal exhalative sediment.New information and acknowledge are afford for the searching of crust-mantle mixed hydrothermal mineral and the study of sedimentary environment in this period.