摘要
为了划分对比地层,确定地层层位,对济阳地区油气勘探钻孔曲古2、曲古3、义136中的孢粉样品进行了分析,其中5块样品含有孢粉化石,分别是曲古23(2843.2m)、义1365(3772.6m)、曲古334(4059m)、曲古323(4041m)和曲古313(4013m)。通过分析鉴定,共鉴定出59属,119种和未定种,根据样品中孢粉成分和含量的变化,建立了如下三个孢粉组合,自下而上为:Ⅰ.Cyclogranisporites Granulatisporites Laevigatosporites组合(山西组下部),Ⅱ.Punctatisporites Cyclogranisporites Florinites组合(山西组上部),Ⅲ.Macrotorispora Vesicaspo ra Pteruchipollenites组合(上石盒子组)。通过与华北、华南部分地区对比,确定各孢粉组合的地质时代为早二叠世中期(组合Ⅰ和组合Ⅱ),晚二叠世早期(组合Ⅲ)。由于含孢粉样品较少,层位不连续,其中下石盒子组孢粉组合未建立,有待于进一步研究。
In order to establish stratigraphic correlation, palynological samples from the drills for prospecting oil and gas of Qugu 2,Qugu 3 and Yi 136 were analyzed in the Jiyang Depression of Shandong Province. Five samples have yielded sporo-pollen fossils. They are Qugu 2-3（2 843.2 m）, Qugu 3-34（4 059 m）, Qugu 3-23（4 041 m）, Qugu 3-13 （4 013 m） and Yi 136-5（3 772.6 m）. Fifty-nine genera and 119 species of sporo-pollen fossils have been found. According to the vertical changes of the components and contents of sporo-pollen fossils, 3 assemblages may be distinguished as follows （from lower to upper）： Ⅰ. Cyclogranisporites-Granulatisporites-Laevigatosporites assemblage （lower part of Shanxi Formation）, Ⅱ. Punctatisporites- Cyclogranisporites-Florinites assemblage （upper of Shanxi Formation）, Ⅲ. Macrotorispora-Vesicaspora-Pteruchipollenites assemblage （upper Shihezi Formation）. Compared with the assemblages in other areas of North and South China, the geological age of the assemblages in the Jiyang depression should be middle Early Permian （assemblages Ⅰ and Ⅱ ）, or early Late Permian （assemblage Ⅲ ）. Because sporopollen fossils have not been found in the Lower Shihezi Formation, the assemblage has not been set up. More research work should be done in the future.
出处
《微体古生物学报》
CSCD
北大核心
2006年第2期165-174,共10页
Acta Micropalaeontologica Sinica
基金
国家973计划项目"盆地多种能源矿产共存富集的判识体系
预测理论和协调勘探模式"(编号:2003CB214608)资助
关键词
孢粉组合
二叠纪
济阳坳陷
山东
Sporo-pollen assemblages, Permian, Jiyang Depression, Shandong
