新疆石油地质

新疆石油地质 ›› 1995, Vol. 16 ›› Issue (1): 38-41.

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塔里木盆地轮南地区奥陶纪生物礁古生态特征

肖传桃, 刘岭山, 罗传容, 张尚峰   

  1. 江汉石油学院地质系 湖北荆州 434102
  • 收稿日期:1994-10-10 出版日期:1995-03-01 发布日期:2020-07-28
  • 作者简介:肖传桃: 讲师 地层古生物学

PALEOECOLOGY OF ORGANIC REEF (ORDOVICIAN) IN THE LUNNAN AREA, TARIM BASIN

Xiao Chuantao, Liu Lingshan, Luo Chuanrong, Zhang Shangfeng   

  1. Lecturer, Stratigraphic Paleontology, Department of Geology, Jiarighan Petroleum Institute, Jiangling, Hubei 434102
  • Received:1994-10-10 Online:1995-03-01 Published:2020-07-28

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摘要： 首次发现轮南地区奥陶纪生物礁, 通过对其古生态研究, 建立了4个造礁群落, 即Calathium-Archaeoscyphia群落, Palaeoporella群落, Cyanophyta群落和Calcisponge群落, 并分析了它们的组成、结构、功能及生态环境。对造礁群落演化研究表明, 该区奥陶纪生物礁存在着Calathium-Archaeoscyphia→Palaeoporella→Calathium-Archaeoscyphia群落演替和Cyanophyta→Calcisponge群落演替, 前者对应于早奥陶世生物礁发育的早期障积阶段、顶峰障积阶段和晚期障积阶段, 后者对应于晚奥陶世生物礁的粘结阶段和障积－粘结阶段。

关键词: 塔里木盆地, 轮南地区, 奥陶纪, 化石礁, 古生态学, 古生物群落

Abstract: Ordovician organic reef discovered in the Lunnan area at the first time was examined in terms of paieoecology, and then 4 hermatypic communities were established, i. e. Calathium-Archaeoscyphia, Palaeoporella, Cyanophyta and Calcisponge. Their composition, texture, function . and habitat were also examined. Analysis of evolution of hermatypic community shows that two phases of community alternations occur in the course of formation of Ordovician organic reef, i. e. Calathium-Archaeoscyphia → Palaeoporella → Calathium-Archaeoscyphia and Gyanophyta → Calcisponge. The former phase corresponds to early, peak, and late baffling periods in the evoiutionary course of Early Ordovician organic reef, whereas the latter phase corresponds to the bounding and baffling-bounding periods during the evolution of Late Ordovician organic reef.

Key words: Tarim basin, Lunnan area, Ordovician, Fossil reef, Paleoecology, Paleontological community