摘要
江南造山带东段经公桥地区新元古代双桥山群地层保存较为完整,对经公桥地区双桥山群的横涌组、计林组以及安乐林组进行剖面测量,根据野外沉积构造、沉积层序特征,结合室内薄片鉴定和粒度分析对经公桥地区双桥山群的沉积环境进行研究,认为双桥山群沉积相为海底扇相,其中横涌组为中扇亚相、计林组为外扇亚相、安乐林组为中扇亚相。双桥山群由下至上的沉积特征指示水体变化趋势为浅-深-浅。
The strata of the Neoproterozoic Shuangqiaoshan Group in Jinggongqiao area in the eastern sector of Jiangnan Orogen are preserved relatively completely. This paper presents results based on the sedimentary analyses of the Hengyong Formation, Jilin Formation and Anlelin Formation in Shuangqiaoshan Group. The data suggest that the Shuangqiaoshan Group deposited in the submarine fan facies, among which the middle fan subfacies represented by the Hengyong and Anlelin formations, and outer fan subfacies represented by the Jilin Formation. Overall, the Shuangqiaoshan Group shows a characteristic shallow-deep-shallow upward sedimentary sequence.
作者
马雪
高天山
周效华
钱迈平
李云
朱清波
靳国栋
洪文涛
余明刚
MA Xue;GAO Tian-shan;ZHOU Xiao-hua;QIAN Mai-ping;LI Yun;ZHU Qing-bo;JIN Guo-dong;HONG Wen-tao;YU Ming-gang(Nanjing Geological Survey Center, China Geological Survey, Nanjing 210016;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059)
出处
《地层学杂志》
CSCD
北大核心
2019年第3期295-305,共11页
Journal of Stratigraphy
基金
中国地质调查局项目(DD20160038,DD20190373,DD20190361)资助
关键词
双桥山群
沉积环境
新元古代
江南造山带
Shuangqiaoshan Group
sedimentary environment
Neoproterozoic
Jiangnan Orogen