论文部分内容阅读
本文研究的是大陆边缘海以底栖有孔虫为主的化石群落与层序地层的关系。海平面变化是控制化石群落演替和识别划分层序的主要因素。化石群落在一个完整海水进退旋回中呈机会种群落、平衡种群落、终极种群落演替变化,在化石丰度、多样度、均衡度、成壳类型等方面分异显著,与层序地层的三级层序的海进体系域、凝缩期沉积、高位体系域具有密切的耦合关系。化石群落的演替变化是对海洋环境变迁的能动反映。因此,化石群落的研究可以帮助识别和优化层序、沉积体系域和层序界面,从而为层序地层的准确识别划分提供新的思路。
This paper studies the relationship between fossil communities dominated by benthic foraminifera and sequence stratigraphy in continental marginal sea. Sea level change is the main factor in controlling the succession of fossil communities and identifying the sequence of delineation. The fossil community showed the variation of the community of opportunistic species, the balance of species and the succession of the ultimate species in a complete seawater cycle, showing significant differences in fossil abundance, diversity, equilibria and crust types. The third-order marine system tract, condensation period deposition and highstand system tract are closely coupled. The succession of fossil communities is an active reflection of changes in the marine environment. Therefore, the study of fossil communities can help identify and optimize the sequence, sedimentary system domain and sequence boundary so as to provide a new idea for the accurate identification of sequence stratigraphy.