豫西寒武纪叠层石的地层展布及控制因素分析

Analysis of the Stratigraphic Distribution and the Control Factors on the Stromatolites in Cambrian,Western Henan Province

在河南省西部寒武系的渑池-登封小区,共出露23层叠层石,主要集中在馒头组、张夏组和三山子组。笔者在逐层详细描述该叠层石外部宏观形态和地层展布的基础上,分析了叠层石上下地层岩相变化,找出寒武纪叠层石地层展布的规律及其控制因素,认为影响叠层石地层展布的主要因素有沉积环境、水动力条件和后生动物干扰等,并讨论了叠层石生长与核形石、竹叶状灰岩和后生动物的相互关系,提出了叠层石与后生动物共生的生态位观点。

In Cambrian strata, 23 layer stromatolites crop out in Mianchi Dengfeng region, western Henan Prov ince, mainly concentrated in the Mantou Formation, Zhangxia Formation and Sanshanzi Formation. In this paper, the authors find out the rule of the stratigraphic distribution and the control factors on the stromatolites in Cambrian by analyzing the lithofacies changes of the layers on the stromatolites. On the basis of the detailed description of the external morphology and stratigraphic distribution, the authors suggust that the mainly influence factors of the stratigraphic distribution are the sedimentary environment, hydrodynamic condition and metazoan interference. The relationship between growth of the stromatolites and oncoides, fiatpebble limestones, metazoan is also discussed in this paper. At the same time, the view of symbiotic niche is put forward between stromatolites and metazoan.