摘要
通过对吉林珲春土门子组孢粉样品分析,建立了Quercoidites＿Ulmipollenites＿Liquidambar pollenites组合。根据孢粉植物群特征及其与周围地区对比,其地质时代归属新近纪中中新世为宜。孢粉组合中喜温成分占多数,亚热带成分如Caryapollenites、Liquidambarpollenites等也较为常见,反映了当时比较温暖湿润的暖温带—亚热带气候,在我国第三纪植物群区系中属于东部落叶阔叶林植物区。
Through analysizing the samples collected from the Tumenzi formation in Hunchun, Jilin Province, northeast of China, one assemblage of sporopollen is gotten. The flora embraces about 20 families and 33 genera. Angiosperm pollen types dominate the assemblage, comprising up to about 86% of the total sporopollen tallies, while gymnosperm pollen represent only 11% or so. Pteridophyte spores occur sporadically, represented mainly by Osmundacidites, Polypodiaceaesporites and Lycodiumsporites. The most important families are Pinaceae, Fagaceae, Betulaceae, Juglandaceae, Ulmaceae, Hamamelidaceae. According to the sporopollen flora, the geological age of strata is Middle Miocene, The paleoclimate of this region is warm-temperate to subtropical climate, and this sporopollen flora was mixed deciduous and broad-leaved forest.
出处
《山东科技大学学报（自然科学版）》
CAS
2004年第1期19-23,共5页
Journal of Shandong University of Science and Technology(Natural Science)
关键词
孢粉组合
土门子组
新近系
吉林
古植被
古气候
assemblage of sporopollen
Tumenzi formation
Neogene
Hunchun
Jilin Province
