西西伯利亚东南部早凡兰吟期孢粉地层学，古环境和植被再造  

LOWER VALANGINIAN PALYNOSTRATIGRAPHY OF SOUTH-EASTERN REGIONS OF WEST SIBERIA:PALAEOENVIRONMENT AND VEGETATION RECONSTRUCTIONS

作　　者：Ekaterina B.PESTCHEVITSKAYA Irina V.SMOKOTINA Galina E.BAYKALOVA 

机构地区：[1]俄罗斯西伯利亚石油地质与地球物理研究所,俄罗斯新西伯利亚630090 [2]克拉斯诺沃茨克地质调查所,俄罗斯克拉斯诺亚尔斯克660020

出　　处：《地层学杂志》2012年第2期179-192,共14页Journal of Stratigraphy

基　　金：国家自然科学基金(No.91114201);国家重点基础研究发展计划(2012CB821906)资助出版

摘　　要：分析了西西伯利亚东南地区的下凡兰吟阶的两个剖面的陆相孢粉型化石的分布。依据西伯利亚北部已经定年的剖面中动物群建立起来的孢粉组合的对比,确定了孢粉标志层的定义,并与北方区的菊石带相对应的孢粉组合进行了对比。这一工作为早凡兰吟期与气候变化息息相关的植被和景观的短期变化以及周边古盆地变迁的重建,提供了地层依据。欧亚大陆中部和东部地区凡兰吟期孢粉组合的横向对比显示:西西伯利亚东南地区的植被具有印度欧洲和西伯利亚加拿大两大古植物地理区的过渡性质,显有这两区的典型特征。The distribution of terrestrial palynomorphs is analyzed in two Lower Valanginian sections from south- eastern areas of West Siberia. Comparison with the palynological zonation developed on fauna in the dated sections of North Siberia allows the definition of palynological marker levels and calibration of southern palynological zones against the Boreal ammonite standard. It provides a stratigraphic basis for the reconstruction of short-time fluctuations of the Early Valanginian vegetation and landscape related to climatic changes and the dynamics of the neighboring pa- laeobasin. Lateral comparison of Valanginian palynological assemblages of central and eastern regions of Eurasia shows the transitional character of the vegetation in the southeastern region of West Siberia, demonstrating typical features of both the Indo-European and the Siberian-Canadian palaeofloristic provinces.

关 键 词：孢粉地层学 古植物 古植物区 凡兰吟期 白垩纪 西西伯利亚 

分 类 号：P534.53[天文地球—古生物学与地层学]