大庆长垣南端晚白垩世孢粉组合特征及其古气候记录  

Late Cretaceous palynological record and its paleoclimate significance in the southern of Daqing placanticline

作　　者：徐增连 汤超 魏佳林 曾辉 肖鹏 刘华健 XU Zeng-lian;TANG Chao;WEI Jia-lin;ZENG Hui;XIAO Peng;LIU Hua-jian(Tianjin Centre,China Geological Survey,Tianjin 300170,China;Key Laboratory of Uranium Geology,China Geological Survey,Tianjin 300170,China)

机构地区：[1]中国地质调查局天津地质调查中心,天津300170 [2]中国地质调查局铀矿地质重点实验室,天津300170

出　　处：《华北地质》2021年第2期74-80,共7页North China Geology

基　　金：国家重点研发计划:“北方砂岩型铀能源矿产基地深部探测技术示范(2018YFC0604200)”;中国地质调查局项目:“二连-松辽盆地砂岩型铀矿地质调查(DD20190121)”。

摘　　要：钻孔ZKMX15位于松辽盆地北部大庆长垣南端,岩性以泥岩夹粉砂岩为主,富含孢粉化石。通过对大庆长垣南端铀矿区钻孔ZKMX15岩芯孢粉分析,可以确定采样段岩心的地质时代为晚白垩世Campanian期;根据沉积特征和孢粉植物群面貌,对古植被和古气候进行了讨论,认为本区晚白垩世嫩江组上部沉积时期植被类型是针叶林、草丛,属于半干旱、半湿润的热带-亚热带气候环境。The ZKMX15 core is located in the south of Daqing Placanticline,northern Songliao Basin.The sediments are mainly composed of mudstones interbedded with siltstones,which are rich in sporo-pollen.A late Cretaceous Campanian age is inferred based on palynostratigraphy and comparison with other pollen assemblages in China.Moreover,the sedimentary characteristics and palynological flora,the paleovegetation and paleoclimate are discussed.The vegetation type contains coniferous forest and herb.A semi-arid and semi-humid tropical-subtropical climate was prevailed in the study area during the late Cretaceous.

关 键 词：古气候 孢粉组合 晚白垩世 大庆长垣南端 

分 类 号：P512.2[天文地球—地质学]