豫西寒武纪叠层石演化特征及其与后生动物的耦合关系

发布时间：2018-11-27 20:40

【摘要】：作为微生物席建造物的叠层石记录了大量的古环境和古地理信息,在豫西寒武系出露18层叠层石,以宏观和微观沉积特征为基础,依据各组段叠层石丰度(层厚度)和分异度(形态类型)的演化,将豫西寒武纪叠层石划分为6个演化组合。从叠层石组合的微观纹层、微生物化石及其微生物席演化等方面,结合沉积学和生物化石特征,探讨了豫西寒武纪叠层石的幕式演化,分别为微生物岩-叠层石演化幕和微生物岩-灰岩演化幕。以中寒武世灰岩中微生物岩与遗迹化石的密度关系为例,并从整个寒武纪微生物岩与后生动物化石之间关系的角度分析,认为叠层石微生物岩演化与后生动物之间并非只是简单的"此消彼长",而是一种动态平衡的耦合关系。
[Abstract]:The stromatolite, as a microbial mat formation, recorded a large amount of paleoenvironment and paleogeography information. The 18-layer stromatolites emerged from the Cambrian in the western part of Henan Province, and were based on the macroscopic and microscopic sedimentary characteristics. Based on the evolution of stromatolite abundance (layer thickness) and differentiation (morphological type) in each segment, the Cambrian stromatolites in western Henan are divided into six evolutionary assemblages. In this paper, the authors discuss the episodic evolution of the Cambrian stromatolites in the west of Henan Province from the microstratigraphy, microfossils and microbial sheet evolution of stromatolite assemblages, combined with the characteristics of sedimentology and biofossils. They are microbe rock stromatolite evolution curtain and microbial rock limestone evolution curtain respectively. Taking the density relationship between microbes and trace fossils in the middle Cambrian limestone as an example, the relationship between the whole Cambrian microbial rocks and the metazoan fossils is analyzed. It is considered that the evolution of stromatolites and metazoa is not a simple "fluctuation", but a dynamic equilibrium coupling relationship.
【作者单位】：河南理工大学资源环境学院;河南省生物遗迹与成矿过程重点实验室;
【基金】：国家自然科学基金项目(U1404406,41502106) 中国石油大学油气资源与勘探国家重点实验室开放项目(PRP/open-1407) 河南理工大学博士基金项目(B2014-069)
【分类号】：Q915;P534.41

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