银额盆地下白垩统巴音戈壁组含油页岩岩系孢粉化石特征及地质意义  

Characteristics and Geological Significance of Palynological Fossils from Bayingebi Formation of Lower Cretaceous in Yin’e Basin

作　　者：柳蓉[1,2] 闫旭 刘招君 张坤[1] 武昕普 赵康安 Liu Rong;Yan Xu;Liu Zhaojun;Zhang Kun;Wu Xinpu;Zhao Kang’an(College of Earth Sciences,Jilin University,Changchun 130061,China;Key Laboratory of Oil Shale and Coexistent Energy Minerals of Jilin Province,Changchun 130061,China)

机构地区：[1]吉林大学地球科学学院,长春130061 [2]吉林省油页岩与共生能源矿产重点实验室,长春130061

出　　处：《吉林大学学报（地球科学版）》2020年第2期341-355,共15页Journal of Jilin University：Earth Science Edition

基　　金：吉林省重点科技研发计划项目(20180201077SF)。

摘　　要：白垩纪陆相古气候研究已经成为国际地球环境系统研究的重要参考,对银额盆地下白垩统巴音戈壁组进行系统取样,通过岩性观察和孢粉鉴定分析,系统研究了研究区下白垩统古气候演化及有机质富集条件。研究区共鉴定孢粉58属173种,包括裸子植物37属141种,被子植物6属11种,蕨类植物15属21种。孢粉组合中裸子植物花粉占绝对优势,均在90%以上。植被类型主要为针叶林,其次为针阔叶混交林,属于暖温带-北亚热带气候类型,总体表现为半湿润-湿润气候,部分层位为半干旱气候。其中,最有利于研究区有机质富集的气候条件是半湿润气候,其次为湿润气候条件。The study of Cretaceous continental paleoclimate has become an important reference for the international study of the earth environment system. The systematic sampling of the Lower Cretaceous Bayingebi Formation in Yin’e basin was made. Through the observation of lithology and analysis of sporopollen, the paleoclimate evolution and organic enrichment conditions were systematically studied. A total of 173 species belonging to 58 genera were identified, including 141 species belonging to 37 genera of gymnosperms, 11 species belonging to 6 genera of angiosperms, and 21 species belonging to 15 genera of ferns. Gymnosperms are dominant in the pollen assemblages with the pollen content over 90%. Coniferous forest is the main vegetation type, followed by coniferous and broad-leaved mixed forest, reflecting the north subtropical climate in warm temperate zone. The overall climate is semi-humid and humid with semi-arid in some layers. Semi-humid climate is the most favorable climate for the enrichment of organic matter in the study area, followed by humid climate.

关 键 词：孢粉 古气候 下白垩统 巴音戈壁组 银额盆地 

分 类 号：P52[天文地球—古生物学与地层学] P532[天文地球—地质学]