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舒兰盆地位于佳伊地堑中南段,伊通盆地东北部,是北东向展布的一个狭长状断陷盆地,前人仅对舒兰盆地开展过初步的地质调查,但对盆地构造特征、演化过程的研究相对薄弱。综合区域地质资料、孢粉资料等,分析对比了舒兰盆地与伊通盆地的新生代沉积地层;通过电法、地震剖面解析,认为盆地南段为半地堑式构造特征,中段为地堑式构造特征,盆地北段从西北至东南呈阶梯状加深的构造形态;结合钻井资料分析认为,盆地基底岩性南段以上二叠统杨家沟组为主,中段主要由花岗岩和白垩系组成,北段主要由白垩系组成;综合分析认为,舒兰盆地构造演化可划分为3个构造演化阶段,即初始断陷期(古新世早期)、断陷期(古新世—渐新世)和挤压反转期(渐新世—中新世)。
The Shulan Basin is located in the middle-southern section of Jiayi Graben and northeast of Yitong Basin. It is a narrow-length faulted basin distributed in the north-east direction. Previously, only preliminary geological surveys were conducted on the Shulan Basin. However, The study of the characteristics and evolution process is relatively weak. Based on the comprehensive regional geological data and sporopollen data, the Cenozoic sedimentary strata of Shulan Basin and Yitong Basin are analyzed and compared. By electrical method and seismic section analysis, the southern section of the basin is considered as half-graben structural features and the middle section is the graben According to analysis of drilling data, it is considered that the Upper Permian Yangjiagou Formation in the southern part of the basement lithology of the basin is mainly composed of granite and Cretaceous , And the northern segment is mainly composed of Cretaceous. According to the comprehensive analysis, the tectonic evolution of the Shulan Basin can be divided into three tectonic evolution stages, that is, the initial fault depression period (early Paleocene), fault depression period (Paleocene-Oligocene) ) And compression inversion period (Oligocene - Miocene).