Stratigraphy and palaeoenvironments across the Jurassic-Cretaceous boundary in the reference section (Olenek River) for eastern regions of Laptev Sea area (Arctic Siberia,Russia)  

作　　者：Boris L.Nikitenko Ekaterina B.Pestchevitskaya Svetlana N.Khafaeva 

机构地区：[1]Trofimuk Institute of Petroleum Geology and Geophysics,Siberian Branch of the Russian Academy of Sciences,Novosibirsk 630090,Russia [2]Novosibirsk State University,Novosibirsk 630090,Russia

出　　处：《Global Geology》2019年第4期270-279,共10页世界地质（英文版）

基　　金：Financial support:Russian Science Foundation 18-17-00038;Scientific support:Russian FSI 0331-2019-0004;IGCP 679,632

摘　　要：The Volgian-Valanginian succession of shallow-water deposits from the Olenek section(Anabar-Lena region,Arctic Siberia)has been studied by sedimentological and palaeontological methods.High-resolution biostratigraphy of studied interval is based on the ammonites,foraminifers,marine and terrestrial palynomorphs.Foraminiferal and palynological zones have important regional implications providing well-constrained biostratigraphy of the Anabar-Lena region.Sedimentological studies together with ecological analysis of the associations of microbenthos,microphytoplankton and terrestrial palynomorphs allow the palaeoenvironmental reconstructions for the marginal area of the Anabar-Lena palaeosea and coastal land areas.The Volgian-Valanginian succession of shallow-water deposits from the Olenek section(Anabar-Lena region, Arctic Siberia) has been studied by sedimentological and palaeontological methods. High-resolution biostratigraphy of studied interval is based on the ammonites, foraminifers, marine and terrestrial palynomorphs. Foraminiferal and palynological zones have important regional implications providing well-constrained biostratigraphy of the Anabar-Lena region. Sedimentological studies together with ecological analysis of the associations of microbenthos, microphytoplankton and terrestrial palynomorphs allow the palaeoenvironmental reconstructions for the marginal area of the Anabar-Lena palaeosea and coastal land areas.

关 键 词：Upper Jurassic Lower Cretaceous Arctic Siberia BIOSTRATIGRAPHY PALAEOENVIRONMENTS MICROFOSSILS 

分 类 号：P53[天文地球—古生物学与地层学]