皖北夹沟上前寒武系同期异相岩层关系的认识  

Significance of syndepositionai relationship in the Precambrian strata in Jiagou,Northern Anhui

作　　者：刘家润[1] 施贵军[1] 吴俊奇[1] 方一亭[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《地层学杂志》1996年第3期217-223,共7页Journal of Stratigraphy

基　　金：中国科学院南京地质古生物研究所现代古生物学和地层学开放研究实验室项目(933106)

摘　　要：皖北夹沟唐山子的岩层界面横向追踪及地层工作结果,显示该地点所存在的上前寒武系倪园组(非礁相岩层)的下部与赵圩组(叠层石礁相岩层)的下部为先后关系,而与赵圩组的中上部为同时不同沉积相的沉积。倪园组与赵圩组为部分同期异相的地层关系是目前所建立的皖北上前寒武系地层层序中尚未显示的。同期异相的相变现象在前寒武系的地层学研究中应受到充分的重视。The results of the geological mapping,tracing the marker beds and stratigra- phy fully indicate that both strata of the lower part of the Niyuan Formation(non-reef limestone)and the middle-upper part of the Zhaowei Formation(stromatolite-reef lime- stone)at Tangshanzi of Jiagou,Northern Anhui,were synchronogenic deposits of dif- ferent facies.The syndepositional relationship might represent a unknown stratigraphic relationship in the Precambrian stratigraphic sequence of Northern Anhui.The syndepo- sitional phenomenon must be given much attention in the Precambrian stratigraphical re- searches.

关 键 词：地层 前寒武纪 异相岩层 赵圩组 

分 类 号：P534.41[天文地球—古生物学与地层学]