摘要
寒武纪至奥陶纪时期 ,鄂东南地区以所谓“江南古断裂”为界 ,两侧在沉积作用、岩性、岩相及古生物特征等方面存在着显著差异。经野外调查发现 ,在两者的过渡地段存在多种斜坡相沉积和古生物混合沉积 ,但未见有与古断裂有关的地质现象 ,证明了造成上述差异与古地貌特征的直接关系 ,从而可以把该区过渡地段南北寒武纪～奥陶纪地层置于受共同海平面升降影响的环境中综合考虑 ,将其划分为四个地层层序 ,建立了该区地层的时空格架。
During the Cambrian-Ordovician periods, there developed different sedimentology, petrology, lithofacies, and palaeontology across the so-called 'palaeofault Jiangnan'. Our field investigation indicates that there exist sedimentological and palaeontological mixture of slope facies in the transitional zone. No fault-related phenomena occurred, which suggests that those differences between two parts of the fault were resulting from palaeogeomorphic features. Both southern and northern Cambrian and Ordovician system were affected by the sea level fluctuation and made up of four stratigraphic sequences, which comprised the local temporal-spatial framework.
出处
《资源环境与工程》
2004年第3期18-24,共7页
Resources Environment & Engineering
