开鲁盆地晚中生代地层

根据２００余口钻井资料，运用了生物地层学、岩石地层学、磁性地层学等方法，建立了开鲁盆地晚中生代地层层序及其与邻区地层的对比关系。早白垩世为盆地断陷期，发育了含热河生物群地层，包括义县组、九佛堂组、沙海组、阜新组；中晚白垩世为盆地坳陷期，发育含松花江生物群与明水生物群地层，包括泉头组—青山口组、姚家组、嫩江组、四方台组、明水组。

Late Mesozoic strata of the Kailu Basin

According to the data derived from more than 200 wells, this paper establishes the correfations between the formation sequence and the adjacent formation in the basin using the method of biostratigraphy, petrostratigraphy and paleomagnetic stratigraphy etc. The strata with the Rehe biota including the Yixian, Shahai and Fuxin Formations were developed in Early Cretacous time during which there were depressions in the basin. The strata with Songhuajiang and Mingshui biota including Quantou-Qingshankou, Yaojia, Nengjiang, Sifangtai and Mingshui Formations were developed in the basin Mid-Late Cretacous time during which the depressions were developed.