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黔南斜坡相区二叠系层序地层序列及其年代地层对比
引用本文:史晓颖,梅仕龙.黔南斜坡相区二叠系层序地层序列及其年代地层对比[J].现代地质,1999,13(1):1-10.
作者姓名:史晓颖  梅仕龙
作者单位:China University of Geosciences,Beijing,100083
基金项目:国土资源部“九五”重大基础研究项目,国家“九五”攀登专项
摘    要:黔南斜坡相区的二叠系划分为16个三级层序,4个层序组,分属于2个中层序。大多数三级层序的底界属整合界面,有良好的牙形石和化石带控制。该区二叠纪有4次重要的海平面下降事件,它们分别出现在牙形石Swwhitei带底部,Swafhanzhongensis带下部,JXuanhanensis带下部以及Clyini带底部。已识别的海进事件中,有3个最具地层划分和对比意义,分别出现在牙形石Nexculptus带底部,Jnankingensis带底部和Jpostbiteri带下部,均伴随有重要的生物群替代。研究表明,沉积层序的关键界面对于进一步优化阶和生物时带的界线,使年代地层界线成为野外可识别的物理界面具有重要的潜在价值。

关 键 词:二叠系  斜坡相区  层序地层序列  生物时带  贵州南部

PERMIAN SEQUENCE SUCCESSIONS OF SLOPE FACIES IN SOUTHERN GUIZHOU AND THEIR CHRONOSTRATIGRAPHIC CORRELATION
Shi Xiaoying,Mei Shilong,Sun Yan,Li Bin,Sun Keqin.PERMIAN SEQUENCE SUCCESSIONS OF SLOPE FACIES IN SOUTHERN GUIZHOU AND THEIR CHRONOSTRATIGRAPHIC CORRELATION[J].Geoscience——Journal of Graduate School,China University of Geosciences,1999,13(1):1-10.
Authors:Shi Xiaoying  Mei Shilong  Sun Yan  Li Bin  Sun Keqin
Abstract:The Permian in slope facies area of southern Guizhou consists of sixteen 3rd order sequences, which can be grouped into four sequence sets.Most of the sequences are delineated by continuity surfaces, and are precisely controlled by conodont and fusulinid zones.Four important sea level falls have been recognized in the area, which occurred respectively at the positions corresponding to the bottom of conodont Sw whitei zone, lower part of Sw aff hanzhongensis zone, middle part of J Xuanhanensis zone and the base of Cl yini zone.Among the recognized transgressions, three are regarded as the most significant ones.They occur respectively at the bottom of conodont N exculptus zone, base of J nankingensis zone and the lower part of J pos tbitteri zone, and are all accompanied with faunal turnovers.The key surfaces in depositional sequences have the potentials of fine tuning the boundaries of stages and biozones.
Keywords:Permian  slope facies  sequence stratigraphy  chronostratigraphic correlation  southern Guizhou  
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