辽东半岛南部中上寒武统高频旋回层序划分及沉积速率初探

通过对辽东半岛南部中晚寒武系张夏组、炒米店组高频旋回层序及复合海平面变化的划分、研究,以及对高频旋回层序的类型、各种级别旋回层序形成时限及其控制因素的讨论,探讨高频旋回沉积速率的变化规律,认为沉积速率的变化过程是一个非渐变的由底部向顶部加大的变化趋势,各种级别旋回层序的沉积速率变化情况相似,由小级别旋回到大级别旋回的逐级叠加,形成一非渐变的变化曲线。

SUBDIVISION OF HIGH FREQUENCY CYCLIC SEQUENCE AND RATE OF SEDIMENTATION OF MID UPPER CAMBRIANSERIES IN THE SOUTH OF LIAODONG PENINSULA

The high frequency cyclic sequence and composite sea level change of Zhangxia,Chaomidian Formations of Mid Late Cambrian system in the south of Liaodong peninsula are subdivided and studied The types of the high frequency cyclic sequence,the forming time limits of every grades of cyclic sequences with their controlling factors, and the change regularity of the sedimentation rate of the high frequency cycle are discused It is concluded that the changing process of the sedimentation rate is a non gradation enlarging trend from bottom to top;the changing of sedimentation rate of every grade of cyclic sequences is similar;the successive superimposition from lower to higher grade cycles form a non gradation changing curve