焉耆盆地中生界层序地层和沉积体系分析  

MESOZOIC SEQUENCE STRATIGRAPHY AND DEPOSITIONAL SYSTEMS IN YANQI BASIN

作　　者：邱荣华[1] 陈文礼[1] 林社卿[1] 杜耀斌[1] 渠渝鲁 

机构地区：[1]河南石油勘探局,河南南阳473132

出　　处：《地球科学（中国地质大学学报）》2001年第6期615-620,共6页Earth Science-Journal of China University of Geosciences

摘　　要：利用层序地层学原理和方法 ,建立了焉耆盆地中生界层序地层格架 ,将其划分为 4个层序 ,继而分析了各个层序的地层特征、层序演化及各个体系域的沉积体系展布 .研究表明 ,焉耆盆地中生代存在南北两大物源体系 ,盆地总体上以河流—湖泊沼泽相的浅水沉积为主 ,湖泊水体深度不大且分布范围有限 ;层序Ⅲ的水进体系域是湖盆发育的鼎盛时期 ,构成了本区良好的盖层 ;通过层序构成分析 ,探讨了隐蔽圈闭发育的有利层位及区带 .The principle and method for sequence stratigraphy are applied to the establishment of the framework of Mesozoic sequence stratigraphy in Yanqi basin. This framework, classifying the Mesozoic sequence stratigraphy into four sequences, is used to analyze the stratigraphic features of different sequences, sequence evolution, and spreading of the sedimentary systems in different systems tracts. The research shows that two sedimentary source systems, southern and northern ones, are present in Yanqi Mesozoic basin. This basin is dominated by the fluvial and limnetic shallow water deposition. The lacustrine water body is shallow and its distribution is limited. The progressive systems tract in Sequence III is marked by the peak lacustrine growth period. This paper also discusses the potential horizons and zones favorable for the growth of subtle traps.

关 键 词：焉耆盆地 层序地层学 体系域 隐蔽圈闭 沉积体系 中生界 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]