摘要
对山东聊城阿城镇煤田A19-6、A20-6、L104钻孔岩石样品进行了分析,发现从太原组中上部到上石盒子组地层中均有大量孢粉化石保存,经分析鉴定和统计,共有孢粉化石53个属168种及部分未定种。根据孢粉属种的纵向分布情况及含量的变化,在本区二叠系建立了4个孢粉组合,自上而下为:Ⅳ.Triquitrites microgranifer-Macrotorispora media组合带;Ⅲ .Li mitisporites rhombicorpus-Patellisporites meishanensis组合带;Ⅱ .Gulis-porites cochlearius-Sinulatisporites sinensis组合带;Ⅰ .Thymospora pseudothiessenii-Laevogatisporites vulgaris组合带。通过与邻区及华北部分地区对比,确定本区孢粉组合所在的地质时代应为:太原组中上部,早二叠世早期(组合Ⅰ) ;山西组,早二叠世中期(组合Ⅱ) ;下石盒子组,早二叠世晚期(组合Ⅲ) ;上石盒子组,晚二叠世早期(组合Ⅳ)。
Palynological samples from the drills A19-6, A20-6 and L104 were analyzed from the Echeng Town Coalfield of Liaocheng, Shandong Province. There are abundant sporo-pollen fossils from the Taiyuan Formation to the Upper Shihezi Formation, and 53 genera and 168 species of sporo-pollen fossils have been found. According to the down-core variations of sporo-pollen fossils, 4 sporopollen assemblages may be distinguished as follows （in descending order） ： Ⅳ. Triquitrites rnicrograni f er-Macrotorispora media assemblage; Ⅲ. Limitisporites rhombicorpus -Patellisporites meishanensis assemblage;Ⅱ. Gulisporites cochlearius-Sinulatisporites sinensis assemblage and Ⅰ. Th ymospora pseudothiessenii-Laevogatisporites vulgaris assemblage. Compared with those in nearby regions and some other areas of Northern China, the geological ages of the present sporo-pollen assemblages of Liaoeheng should be the early Early Permian （assemblage Ⅰ , mid-upper part of Taiyuan Formation）, the middle Early Permian （assemblage Ⅱ , Shanxi Formaiton）, the late Early Permian （assemblage Ⅲ , down Shihezi Formation） and the early late Early Permian （assemblage Ⅳ, Upper Shihezi Formation）.
出处
《微体古生物学报》
CSCD
北大核心
2009年第3期271-282,共12页
Acta Micropalaeontologica Sinica
关键词
孢粉组合二叠纪
阿城镇煤田
山东
华北
sporo-pollen assemblages, Permian, Echeng Town Coalfield, Shandong, N. China
