大杨树盆地中部甘河地区含被子植物化石地层新知  

NEW FINDINGS OF THE ANGIOSPERM-BEARING STRATA IN GANHE,CENTRAL DAYANGSHU BASIN, INNER MONGOLIA,NE CHINA

作　　者：张立军 初航 王鑫[3] 韩刚 高飞[5] ZHANG Li-jun;CHU Hang;WANG Xin;HAN Gang;GAO Fei(Hainan Tropical Ocean University,Sanya 572022;Tianjin Center of Geological Survey,China Geological Survey,Tianjin 300170;Nanjing Institute of Geology and Palaeontology,Chinses Academy of Sciences,Nanjing 210008;Hainan Vocational University of Science and Technology,Haikou 571126;Shenyang Center of Geological Survey,China Geological Survey,Shenyang 110034)

机构地区：[1]海南热带海洋学院,海南三亚572022 [2]中国地质调查局天津地质调查中心,天津300170 [3]中国科学院南京地质古生物研究所,江苏南京210008 [4]海南科技职业大学,海南海口571126 [5]中国地质调查局沈阳地质调查中心,辽宁沈阳110034

出　　处：《地层学杂志》2020年第3期326-336,共11页Journal of Stratigraphy

基　　金：海南热带海洋学院引进人才科研启动基金项目(RHDRC202008);海南热带海洋学院学科带头人和博士科研启动基金项目(RHDXB201802)共同资助;2017年海南省重点学科海洋科学—海洋地质项目。

摘　　要：大杨树盆地位于大兴安岭北段,最近在该盆地中部的内蒙古鄂伦春自治旗甘河地区发现大量保存精美的被子植物化石。通过区域地质调查、火山岩和碎屑岩中锆石测年和生物地层对比等手段,确定这些化石产出层位是上白垩统嫩江组1段,时代位于Santonian晚期—Campanian早期之间,属于松花江生物群分子。这些被子植物化石的发现对研究白垩纪被子植物谱系发生和生态学具有重要意义。Recently a lot of well-preserved fossil angiosperms were found in Ganhe area of the central Dayangshu Basin,Oroqen Autonomous Banner,Inner Mongolia,NE China.A regional geological survey of this region,geochronological analysis of volcanic and clastic rocks and a biostratigraphic correlation reveal that the fossil-bearing strata belong to the first member of Upper Cretaceous Nenjiang Formation,having an age between the late Santonian and the early Campanian,and that these angiosperms can be assigned to the Songhuajiang Biota.These fossils are of great significance in further understanding the phylogenetic evolution and ecology of Cretaceous angiosperms.

关 键 词：大杨树盆地 被子植物化石 上白垩统 嫩江组 甘河地区 内蒙古 

分 类 号：P534.53[天文地球—古生物学与地层学]