塔里木盆地北部奥陶系层序地层研究  

STUDY ON SEQUENCE STRATIGRAPHY OF ORDOVICIAN IN NORTH TARIM BASIN

作　　者：瞿辉 徐怀大 郭齐军 

出　　处：《现代地质》1997年第1期8-13,共6页Geoscience

基　　金："八.五"国家科技攻关项目资金

摘　　要：以层序地层学为指导，通过对塔里木盆地北部奥陶系的深入研究，确定奥陶系由２个超层序组成；超层序ＳＳｑ１相当于下奥陶统地层，由４个层序组成。层序的发育以高水位体系域为主，水进体系域相对不太发育；低水位体系域分布较局限。各层序中发育的密集段向盆地方向逐渐合并成复合密集段，表现为“梳状结构”。超层序ＳＳｑ２相当于中、上奥陶统，也由４个层序组成，下部２个层序以低水位浊积扇沉积为主，上部２个层序中体系域发育齐全。This paper attempts to study the Ordovician sequence in the north Tarim Basin under the guide of basic principles of sequence stratigraphy. The Ordovician can be divided into two supersequences: SSq 1 and SSq 2. Supersequence SSq 1 is composed of four sequences which development are mainly of HOST, while TST are not too developed, and the distribution of LST is limited. Condensed sections in each sequence are compiled into compound condensed section towards the basin, and so forms“comb structure”. Supersequence SSq 2 is composed of four sequences too. The lower two sequences are mainly of LST, and the upper two squences are completed. Finally, the relationship between carbonate buildup and the development of sequences is discussed.

关 键 词：塔里木盆地 奥陶系 层序地层学 碳酸盐岩隆 

分 类 号：P534.42[天文地球—古生物学与地层学]