地质与资源2017，Vol.26Issue(5)：425-438,14.
大兴安岭东南部中侏罗统新民组研究新进展
PROGRESS ON THE STUDY OF THE MIDDLE JURASSIC XINMIN FORMATION IN SOUTHEASTERN DAXINGANLING MOUNTAINS
摘要
Abstract
By means of field geological investigation,geological section survey,drilling core logging,fossil study and isotopic dating,combined with the comprehensive analysis of previous data,it is concluded that the Xinmin Formation is mainly a set of volcanic rocks and pyroclastic rocks with coal deposits,bearing mid flora of Coniopteris-Phoenicopsis,bivalve fossil assemblage of Ferganoconcha tomiensis-F.elongate and sporopollen assemblage of Osmundacidites-Lycopodiumsporites-Piceites,which belong to Middle Jurassic.The zircon U-Pb age of volcanic rocks is 161.6 Ma;while that of detrital rocks is between 175±2 Ma and 2537±20 Ma.The youngest age of detrital rocks (175±2 Ma) represents the lower deposition limit of Xinmin Formation.The research results would provide essential data and scientific basis for the Middle Jurassic stratigraphic classification and correlation,as well as the establishment and perfection of the Mesozoic stratigraphic framework in Southeastern Daxinganling Mountains.关键词
新民组/孢粉组合/同位素测年/大兴安岭东南部Key words
Xinmin Formation/sporopollen assemblage/isotopic dating/Southeastern Daxinganling Mountains分类
天文与地球科学引用本文复制引用
丁秋红,王杰,李晓海,姚玉来,李文博..大兴安岭东南部中侏罗统新民组研究新进展[J].地质与资源,2017,26(5):425-438,14.基金项目
中国地质调查局项目“松辽盆地外围三维地质调查”(编号1212011220242) （编号1212011220242）
“松辽外围西部盆地群油气基础地质调查”(编号12120115001001). （编号12120115001001）
