摘要
旋回和层序的有机结合，使地层学领域充满了理性，它摒弃了机械的体系域划分和层序界面的识别，更注重从不完整的地层记录中识别出更多的规律，从而有效地避免了"层序病"的发生。在 20世纪 90年代，旋回和层序有了更深层次的发展，主要进展如下： 1.旋回层序为异成因机制下的自旋回产物，其与地内外及宇宙各因素密切相关； 2.强迫性海退及强迫性海退楔体系域的提出对传统 EXXon层序模式进行了修正； 3.以淹没不整合为底界的Ⅲ型层序的建立； 4.碳酸盐岩与碎屑岩中米级旋回层序类型的划分。
In 1990′ s,the study oncyclic sequence has made great progressin the following aspects.①cosmic factors,such as Galacticyear cycle,galacticplane cycle,etc.,periodically influces Earth system,causing the change of sea level and even the change of the formingof strata.② The concept of forced regressive wedge system tract' changed the model of classical sequence.③ The establishment ofⅢ-type sequence： CS＋ HST.④ meter-scale cyclic sequence in carbonate can be subdivided into 4 types:tidal flat-type,subtidal-type,subtidal nonsymmetrical-type and L-M-type; meter-scale cyclic sequence in clastic rock can be subdivided into 2 types: tidal dynamic-type and wave dynamic-type.
关键词
旋回
层序
强迫性海退
III型层序
层序地层学
cycle
sequence
new progress
cosmic factor
forced regressive
Ⅲ-type sequence
meter-scale cyclic sequence type
