华南石炭纪岩关-大塘界线期牙形石地层分带

基金项目: 国家自然科学基金项目(批准号:40242001)资助。

Conodont zonation in the Carboniferous Yanguanian-Datangian boundary in South China

摘要: 系统采集不同沉积相区和连续沉积的剖面,即浅海台地相广西柳江龙殿山剖面、台缘缓坡相云南施甸鱼硐剖面和台内盆地相广西柳州碰冲剖面,运用数理统计方法,研究了华南岩关—大塘界线过渡期牙形石的产出丰度和相分布,在恢复生物演化序列的基础上,对各剖面首先详细分带,再进一步综合成系统的5个牙形石带,即Gnathodustypicus-G.cuneiformis带、Gnathodustypicus-Protognathoduscordiformis带、Scaliognathusanchoralis-Gnathoduspseu-dosemiglaber带、Gnathoduspraebilineatus带和Paragnathodushomopunctatus带。以生物系统发生为标准,严格限定各带的界线,并与北美、西欧同期地层进行精确对比,为建立杜内阶—维宪阶界线的全球层型(GSSP)提供可靠依据。
- 牙形石带 /
- 全球层型 /
- 杜内阶—维宪阶界线 /
- 华南
Abstract: Conodont fossils were systematically col lected from continuous sections of the Yanguanian-Datangian boundary strata in different sedimentary facies areas in South China,i.e.the Longdianshan section of Liujiang,Guangxi ,in the neritic platform facies,the