摘要
为搞清泰康北地区姚家组地层的沉积相类型及其演化规律,以层序地层学理论为指导,通过层序地层的划分与对比,将姚家组地层划分为3个沉积层序.姚家组地层发育的沉积相类型为三角洲平原亚相和三角洲前缘亚相,三角洲前缘亚相可进一步划分为水下分支河道发育区和河口坝发育区.沉积环境由三角洲平原向三角洲前缘演变,表明姚家组地层沉积时期,盆地水体是逐渐加深的.
In order to clarify the sedimentary types and the evolutionary rule of Yaojia formation in northern Taikang area,guided by the sequence stratigraphic theory,this paper divides the Yaojia formation into three sedimentary sequences by means of the sequence stratigraphic classification and correlation. The types of sedimentary facies developed in Yaojia formation include deltaic plain subfacies and deltaic front subfacies.Of the two subfacies above,the deltaic front subfacies can be further subdivided into underwater distributary channel developing area and river mouth bar developing area.The process of the sedimentary environment evolving from deltaic plain to deltaic front embodies the deepening process of the water body in the basin during the depositional period of Yaojia formation.
出处
《大庆石油学院学报》
CAS
北大核心
2006年第5期111-113,共3页
Journal of Daqing Petroleum Institute
基金
国家自然科学基金项目(40272057)
关键词
松辽盆地
泰康北
姚家组
层序地层
沉积相
Songliao basin
northern Taikang area
Yaojia formation
sequence stratigraphy
sedimentary facies
