倪胜利

• 1:中国地质大学地球科学与资源学院

摘要(Abstract)：

强迫型海退是海平面(或基准面)下降产生的海退过程,从而区别于正常海退。在克拉通盆地中,强迫型海退常产生沉积基底的暴露并且产生沉积间断,在特定背景下,也会留下相应的沉积记录,北京西郊下苇甸剖面张夏组就是一个典型实例。在该张夏组由一个三级层序构成,进一步可划分为3个四级层序。有序的沉积相序列形成的张夏组,快速加深事件不但产生淹没不整合型层序界面,而且形成了张夏组中下部更多的陆棚相泥岩和泥灰岩沉积;但是,在其顶部,鲕粒滩灰岩的发育就成为对强迫型海退进程的响应。因此,上述现象为研究张夏组鲕粒滩的发育特征提供了重要线索,也为大范围的研究提供了一个概念性模型。

关键词(KeyWords)： 层序地层;岩石地层;鲕粒滩;沉积相序;强迫型海退;张夏组;寒武纪;北京;华北

Abstract:

Keywords:

基金项目(Foundation): 国家自然基金项目(No.41472090,40472065)资助

作者(Author): 倪胜利

DOI: 10.19839/j.cnki.dcxzz.2017.01.012

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