华北地层大区寒武纪早期地层统一划分与对比问题

基于华北地层大区数百条寒武纪早期地层剖面与安徽淮南地区基准层序(2组2亚组15段1个亚段)和带序(6个三叶虫带)的确切对比,编制了新的沉积分区图;依据有无猴家山组和馒头组下亚组是否完整,划分出5个沉积区;讨论了各区与基准层序-带序的对比;明确了各地方性岩石地层单位(五山组、李官组、碱厂组、辛集组、朱砂洞组、苏峪口组、五道淌组、昌平组、府君山组、老庄户组、水洞组、黑沟组等)的层位归属(具体至段),确认与寒武纪早期地层有关的3个沉积间断(皖北上升、豫陕上升和燕辽上升),归属于重新厘定的蓟县运动的3个期次.

ON UNIFIED DIVISION AND CORRELATION OF THE EARLY CAMBRIAN STRATA IN THE NORTH CHINA STRATIGRAPHIC PROVINCE

A new sedimentary area division map is compiled on the basis of definite correlations of a couple of hundred of early Cambrian stratigraphic sections with the normal sequence(2 formations and 2 sub formations, 15 members and 1 sub member) and zonal sequence( 6 Trilobita zones) in the Huainan area of Anhui in the North China Stratigraphic Province. Five sedimentary areas are divided based on if there exists the Houjiashan Formation and if the lower sub of the Mantou Formation is complete,and the correlation of each of them with the normal sequence zonal sequence has been discussed. The stratohorizon ownerships of local rock stratigraphic units have been made clear for the Wushan Formation,Liguan Formation,Jianchang Formation,Xinji Formation, Zhushadong Formation, Suyukou Formation, Wudaotang Formation,Changping Formation, Fujunshan Formation,Laozhuanghu Formation, Shuidong Formation, Heigou Formation etc.Three sedimentary discontinuities( the Wanbei uplift,Yushan uplift and Yanliao uplift ) concerning early Cambrian strata have been confirmed to belong to the renewed three stages of Jixian Movement.