摘要
松辽盆地南部沙河子组自下而上划分为2个孢粉组合.1)克拉梭粉(Classopollis)-拟云杉粉(Piceites)-紫箕孢(Osmundacidites)组合,分布于沙河子组一段.2)三角粒面孢(Granulatisporites)-三角瘤面孢(Lophotriletes)-无突肋纹孢(Cicatricosisporites)组合,分布于沙河子组二段.上述孢粉组合研究证明,沙河子组一段的地质时代为早白垩世凡兰吟期(Valanginian),沙河子组二段的地质时代为欧特里沃期(Hauterivian).
Form bottom to top,the Shahezi Formation in the Southern Songliao Basin can be divided into two sporopollen assemblages,i.e.the Classopollis-Piceites-Osmundacidites assemblage and the Granulatisporites-LophotriletesCicatricosisporites assemblage.The former is distributed in the first member of the Shahezi Formation; while the latter,in the second member.Study on the sporopollen assemblages demonstrates that the first member of Shahezi Formation geochronologically belongs to the Valanginian Age of Early Cretaceous Epoch; while the second member,Hauterivian Age.
出处
《地质与资源》
CAS
2014年第2期111-113,共3页
Geology and Resources
基金
东北石油大学地球科学学院项目"松辽盆地南部深层地层研究"(合同编号JS09-W-13-J2-14-30)资助
关键词
松辽盆地南部
沙河子组
孢粉组合
早白垩世
吉林省
Southern Songliao Basin
Shahezi Formation
sporopollen assemblage
Early Cretaceous
Jilin Province
