西南地区晚古生代深水生物相初探

doi:10.3863/j.issn.1000-2634.1994.01.002

西南石油大学学报(自然科学版) ›› 1994, Vol. 16 ›› Issue (1): 11-16.DOI: 10.3863/j.issn.1000-2634.1994.01.002

西南地区晚古生代深水生物相初探

高卫东张廷山

石油勘探系

收稿日期:1993-04-20 修回日期:1900-01-01 出版日期:1994-02-20 发布日期:1994-02-20

Late paleozoic Deep Water Biofacies of SW China

Gao Weidong Zhang Tingshan

Southwest Petroleum Institute

Received:1993-04-20 Revised:1900-01-01 Online:1994-02-20 Published:1994-02-20

摘要/Abstract

摘要： 西南地区晚古生代时位于华南陆板块的南部被动大陆边缘及陆内。自早泥盆世中晚期开始发生裂陷运动，在滇东、黔南和广西地区发生沿北西向为主，北东向为次的拉张裂陷沉降，最终形成由狭长的台问海槽和弧立碳酸盐台地相间排列的古地貌格局。由于浊流的发育、洋流作用，使深水海槽内海水局部混和充氧，各海槽内海水不完全停滞，不同于黑海式全封闭的阻隔式盆地。不同深度的海槽内具有不同的古生物组合，从浅到深，可归入充氧生物相，充氧-贫氧生物相，贫氧-厌氧生物相及厌氧生物相。

关键词: 生物相, 深水海槽, 生物地层带, 晚古生代, 西南地区

Abstract: During the Late paleozoic, SW China was located at the passive continental margin of South China plate. From Middle to Late Devonian,a series of NW and NE rift(with the dominant orientation of NW)occurred to East Yunnan, South Guizhou and the whole Guangxi province,thus forming grabens and horsts. This topographic feature then developed into interplatform rough and isolated platform framework. Generally,tLe deep water environment of this area can be influenced by gravity flow and is much different from the subdeep water interplatform trough and inherited deep water interplatform trough respectively.

Key words: deep water environment, interplatform trough, organisms feature, biofacies, Late paleozoic, Yunnan, Guizhou and Guangxi provinces