枣庄地区寒武纪_早奥陶世层序地层特征

Characteristics of Cambrian-Palaeo-ordovician Strata Sequences in Zaozhuang Area

摘要:

枣庄地区寒武纪—早奥陶世处于被动大陆边缘陆棚环境 ,沉积序列受海平面的周期性变化所控制。由寒武系底部不整合面和怀远运动间断面所限定的地层组合 ,可划分为A ,B两个二级层序和 1 2个三级层序 ,其中张夏组底界面与二级层序底界面一致 ,为一个由陆源浑水沉积环境向碳酸盐清水沉积环境演化的转换面。

Abstract:

It was shelf environment of passive continental margin from Cambrian to early period of Palaeo-ordovician in Zaozhuang area, and sedimentary sequences controlled by periodic variation of sea level. Strata combinations limited by plane of unconformity at the bottom of Cambrian and plane of discontinuity caused by Huaiyuan movement can be divided into two second grade sequences. Of them, the bottom bundary of Zhangxia formation is in conformity with the bottom bundary of the second sequence. It is a transform...