鄂尔多斯盆地东缘临兴地区石炭-二叠系孢粉组合  

Carboniferous-Permian sporopollen assemblages from Linxing area,eastern margin of Ordos Basin

作　　者：魏文艳 杨雄涛 邱琨祁 陈书伟 庾永钊 石松涛 WEI Wenyan;YANG Xiongtao;QIU Kunqi;CHEN Shuwei;YU Yongzhao;SHI Songtao(CNOOC EnerTech-Drilling&Production Co,Tianjin 300452,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《世界地质》2022年第3期437-450,共14页World Geology

基　　金：中海油能源发展股份有限公司科研项目(CCL2014TJXXDS0821)。

摘　　要：鄂尔多斯盆地临兴区块的多口探井中发现了丰富的石炭—二叠系的孢粉化石,为了建立该地区的生物地层划分标准,将该地区与华北克拉通石炭—二叠纪时期的孢粉组合进行了详细的对比,建立了4个孢粉组合:Cyclogranisporites-Denosporites-Florinites组合(Ⅰ),归属于太原组;Sinulatisporites-Gulisporites-Punctatisporites组合(Ⅱ),归属于山西组;Punctatisporites-Limitisporites-Punctatosporites组合(Ⅲ),归属于下石盒子组;Vitreisporites-Pteruchipollenites-Vittatina组合(Ⅳ),归属于上石盒子组。该研究成果为华北克拉通石炭—二叠系古植被和古气候重建提供了新的孢粉数据,古气候恢复表明,太原组—山西组沉积时期,为温暖潮湿的热带-亚热带气候;下石盒子组时期气候开始偏干旱,上石盒子组沉积时期,气候则持续向干旱环境转变。Abundant spores and pollen have been discovered from the Carboniferous-Permian strata in many exploration well cores from Linxing area,eastern margin of Ordos Basin.Detailed correlation of the assemblages with those on North China craton was made in order to set biostratigraphic critaria for the exploration and development of coal-bed methane in this area.Four sporopollen assemblages were recognized and named in ascending order:Cyclogranisporites-Denosporites-Florinites assemblage(Ⅰ)from the Taiyuan Formation,Sinulatisporites-Gulisporites-Punctatisporites assemblage(Ⅱ)from the Shanxi Formation,Punctatisporite-Limitisporites-Punctatosporites assemblage(Ⅲ)from the Lower Shihezi Formation,and Vitreisporites-Pteruchipollenites-Vittatina assemblage(Ⅳ)from the Upper Shihezi Formation.This also provides new palynological data for reconstructing the Carboniferous and Permian paleovegetation and paleoclimate in the North China craton.The reconstructed paleoclimates show that the climate during the deposition of Taiyuan and Shanxi formations are of a warm and humid tropical-subtropical climate,while that of lower Shihezi Formation is of a slightly arid climate,and finally that of upper Shihezi Formation is an arid climate.

关 键 词：太原组 山西组 下石盒子组 上石盒子组 孢粉组合 鄂尔多斯盆地东缘 

分 类 号：P913.8[天文地球—自然地理学]