TY - JOUR

T1 - The Upper Jurassic of the Laptev Sea

T2 - interregional correlations and paleoenvironments

AU - Nikitenko, B. L.

AU - Knyazev, V. G.

AU - Peshchevitskaya, E. B.

AU - Glinskikh, L. A.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - The Late Jurassic evolution of Boreal and Arctic basins is reflected in the widespread deposition of organic-rich black shales (source rocks). In this connection, the priority should be placed on the development and refinement of zonal schemes for the Upper Jurassic of the Laptev Sea coast based on ammonites, foraminifers, ostracods, dinocysts, and spores and pollen from reference sections as the basis for stratigraphic, paleogeographic, and facies studies. The Upper Jurassic and Lower Cretaceous reference section of interest is located on the left side of the Anabar Bay of the Laptev Sea (Nordvik Peninsula, Urdyuk-Khaya Cape). An uninterrupted and continuous section from Upper Oxfordian to Lower Valanginian is exposed in coastal cliffs and consists mainly of silty clay deposits with abundant macro- and microfossils. A reliable biostratigraphic subdivision of the Upper Jurassic interval of this section was taken as the basis for the assessment of the correlation potential of different fossil groups and subsequent interregional correlations, facies analysis, and detailed paleogeographic reconstructions of the study area. The analysis of variations in the composition of macrobenthic communities and microphytoplankton and terrestrial palynomorph assemblages and the biofacies analysis allowed the reconstruction of the evolution of marine paleoenvironmental settings in the western part of the Anabar-Lena sea and in the terrestrial settings in the adjacent land area of Siberia.

AB - The Late Jurassic evolution of Boreal and Arctic basins is reflected in the widespread deposition of organic-rich black shales (source rocks). In this connection, the priority should be placed on the development and refinement of zonal schemes for the Upper Jurassic of the Laptev Sea coast based on ammonites, foraminifers, ostracods, dinocysts, and spores and pollen from reference sections as the basis for stratigraphic, paleogeographic, and facies studies. The Upper Jurassic and Lower Cretaceous reference section of interest is located on the left side of the Anabar Bay of the Laptev Sea (Nordvik Peninsula, Urdyuk-Khaya Cape). An uninterrupted and continuous section from Upper Oxfordian to Lower Valanginian is exposed in coastal cliffs and consists mainly of silty clay deposits with abundant macro- and microfossils. A reliable biostratigraphic subdivision of the Upper Jurassic interval of this section was taken as the basis for the assessment of the correlation potential of different fossil groups and subsequent interregional correlations, facies analysis, and detailed paleogeographic reconstructions of the study area. The analysis of variations in the composition of macrobenthic communities and microphytoplankton and terrestrial palynomorph assemblages and the biofacies analysis allowed the reconstruction of the evolution of marine paleoenvironmental settings in the western part of the Anabar-Lena sea and in the terrestrial settings in the adjacent land area of Siberia.

KW - Ammonites

KW - Biofacies

KW - Dinocysts

KW - Foraminifers

KW - Kimmeridgian

KW - Laptev Sea

KW - Nordvik Peninsula

KW - Oxfordian

KW - Paleogeography

KW - Shelf

KW - Stratigraphy

KW - Volgian

UR - http://www.scopus.com/inward/record.url?scp=84938802403&partnerID=8YFLogxK

U2 - 10.1016/j.rgg.2015.07.008

DO - 10.1016/j.rgg.2015.07.008

M3 - Article

AN - SCOPUS:84938802403

VL - 56

SP - 1173

EP - 1193

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 8

ER -