地质与资源2018，Vol.27Issue(3)：235-242,8.
大兴安岭中南部宝日勿苏地区宝D1井早白垩世孢粉化石
EARLY CRETACEOUS SPOROPOLLEN ASSEMBLAGES FROM THE B-D1 WELL IN THE BOR US AREA OF CENTRAL-SOUTHERN DAXINGANLING MOUNTAINS
摘要
Abstract
With systematic studies on the sporopollen fossils discovered from the section of 22-255.70 m of B-D1 well in Bor Us area, central-southern Daxinganling Mountains, 47 genera and 65 species (including undefined species) are obtained. According to their palynomorphs, contents and variation characteristics, the sporopollen fossils are assigned to the Lycopodiacidites-Densoisporites-Piceaepollenites assemblage with geological age of early stage of Early Cretaceous. The host stratum is corresponding to the Baiyingaolao Formation. Based on the analysis on the growing environment of major species and their parent plants, it is inferred that the central-southern Daxinganling Mountains were in warm temperate-subtropical climate conditions during the early stage of Early Cretaceous. In the meantime, the appearance of a large number of xerophytes indicates the influence of drought but different from typical arid environment, which is possibly related to volcanic activity at the time.关键词
孢粉化石/早白垩世/宝D1井/大兴安岭中南部Key words
sporopollen fossil/Early Cretaceous/B-D1 well/central-southern Daxinganling Mountains分类
天文与地球科学引用本文复制引用
丁秋红,姚玉来,王杰,李晓海,李文博..大兴安岭中南部宝日勿苏地区宝D1井早白垩世孢粉化石[J].地质与资源,2018,27(3):235-242,8.基金项目
中国地质调查局项目"松辽外围西部盆地群油气基础地质调查"(项目编号12120115001001). （项目编号12120115001001）
