浙江江山寒武纪三叶虫生态组合及其古环境意义

Ecology Assembalge of Trilobite and its Paleo-environment Significance During the Cambrian in Jiangshan

浙西寒武纪16个三叶虫化石带的构成和演替规律显示,该区海域在寒武纪出现了二次海平面跌落及其问的一次海平面上升。结合δ13C的变化规律,划分出三个三叶虫生态组合,即Corynexochida组合,Agnostida和Ptychopariida组合。研究表明,这三个组合的相继出现与该区寒武纪海平面变化密切相关,依次指早寒武世的海侵系列、中寒武世至晚寒武世早期的海侵系列和晚寒武世晚期的海退系列。这种无机环境与有机环境的统一揭示了生物与环境的相关性。

The constitute and alternation of 16 trilobite fossil zones in Jiangshan of Zhejiang indicates that there were two major marine regression and one major progression had taken place during the Cambrian. Three trilobite ecology assembalge can be differentiated with their δ^13 C change characteristics： the Corynexochida, the Agnostida, the PtychopaHida. The three ecology assembalge was associated with the changes of sea-level during the Cambrian： the Lower-Cambrian progression series, the Middle-Cambrian to the early of the Upper-Cambrian progression series, and the late of the Upper-Cambrian marine regression series. The unification of inorganic environment and organic environment showed the relationships of biology and environment.