摘要
内蒙古二连盆地早白垩世巴彦花群含有类型丰富、保存精美的被子植物花粉。本文利用光学显微镜观察和扫描电镜观察相结合的方法,对这些花粉类型进行了较详细的研究。研究结果表明,巴彦花群的被子植物花粉主要由属于金粟兰科的Hammenia和Singhipollis,悬铃木科/金缕梅科的Tricolpites以及亲缘关系不明的Polyporites组成。这一被子植物花粉组合面貌指示的地质时代为中晚阿尔必期(Albian)。据相关现生植物的地理分布及煤夹层的存在,推测在早白垩世晚期二连盆地处于湿润的亚热带气候环境中。
The Eren Basin of Nei Monggol extends within the limits of about 107°30--119°10 E longitudeand 42°--45°45N latitude, with a total area of over 100 000m^2. The Early Cretaceous sedimentsknown as the Bayanhua Group are widespread in the subsurface of the Basin. A rich and well--preserved angiosperm pollen microflora studied in this paper was obtained fromthe upper part of the Bayanhua Group,which is dominated by Hammenia Ward,Singhipollis Juhasz &Goczan,Tricolpites Cookson ex Couper and Polyporites Mchedlishvili and referred to the middle--lateAlbian age. Three new species are proposed, namely, Phimopollenites granosus, Tricoipites lacerus and T.lembodes,together with one new combination, Phimopollenites triangula (Hua).
出处
《微体古生物学报》
CSCD
北大核心
1992年第3期243-255,330-335,共13页
Acta Micropalaeontologica Sinica
基金
国家自然科学基金
