摘要
通过对黔南罗甸纳水剖面和桂中来宾铁桥剖面２个斜坡相剖面详细的层序地层研究，将华南二叠系Ｃｉｓｕｒａｌｉａｎ统和Ｇｕａｄａｌｕｐｉａｎ统划分为１个二级层序，即阳新层序，及其９个三级层序，并建立了相应的海平面变化曲线．结合原有和最新的生物地层资料，将这２个剖面的层序地层实现了精确划分对比，从而将原有地层对比精度提高了一倍．阐明了层序与海侵海退旋回的区别与联系．将二叠纪牙形石演化划分为５个阶段、４个演替事件，并阐明了它们与层序地层及海平面变化事件之间的相互关系．同时，提出了二叠纪牙形石分带及其全球对比表．发现栖霞亚统的氧碳同位素在下部偏轻、上部偏重。
One second order sequence, namely the Yangxin sequence, and its three component systems tracts are recognized and subdivided into nine third order sequences, based on a synthetic study of two well_exposed sections of slope facies, namely Tieqiao section, Laibin, Guangxi, and Nashui section, Luodian, Guizhou. The corresponding sea level change curves are established. Precise correlation between these sequences is established, with the aid of renewed biostratigraphic data. Two provinces (cool and warm water provinces), five evolutionary phases and four evolutionary events are recognized for Permian conodonts, and global correlation of Permian conodont zones is made. The provincialism, evolution and correlation of conodonts are shown, which is almost self explanatory. It is found that Chihsian can be subdivided into two parts, the lower part bearing a lighter composition of δ ( 18 O) and δ ( 13 C) and the upper part a heavier composition of δ ( 18 O) and δ ( 13 C). This discovery appears to be significant for global correlation.
出处
《地球科学（中国地质大学学报）》
EI
CSCD
北大核心
1999年第1期21-31,共11页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金
关键词
二叠系
层序地层
牙形石
演化事件
牙形石带
Permian
sequence stratigraphy
conodont evolutionary event
conodont zone
South Guizhou and Central Guangxi.
