Počet záznamů: 1

Stratigraphic significance and resolution of spectral reflectance logs in Lower Devonian carbonates of the Barrandian area, Czech Republic; a correlation with magnetic susceptibility and gamma-ray logs

  1. 1.
    0342126 - GLU-S 2011 RIV NL eng J - Článek v odborném periodiku
    Koptíková, Leona - Bábek, O. - Hladil, Jindřich - Kalvoda, J. - Slavík, Ladislav
    Stratigraphic significance and resolution of spectral reflectance logs in Lower Devonian carbonates of the Barrandian area, Czech Republic; a correlation with magnetic susceptibility and gamma-ray logs.
    Sedimentary geology. Roč. 225, 3/4 (2010), s. 83-98 ISSN 0037-0738
    Grant CEP: GA AV ČR IAAX00130702; GA ČR GA205/08/0767
    Výzkumný záměr: CEZ:AV0Z30130516
    Klíčová slova: VIS spectral reflectance * cyclostratigraphy * sea-level changes * Lower Devonian * red pelagic carbonates * diagenesis
    Kód oboru RIV: DB - Geologie a mineralogie
    Impakt faktor: 1.685, rok: 2010

    Spectral reflectance (SR) is used as a proxy for organic carbon and siliciclastic input in carbonate sediments.This study summarizes results from high-resolution outcrop SR logging of a Lower Devonian distal ramp carbonate section of the Barrandian area, Czech Republic.The SR data were correlated with parallel petrophysical and geochemical data with an aim to improving their cyclostratigraphic and event stratigraphic interpretation potential and the gaps SR data can fill. Transgressive–regressive trends, indicated by facies stacking patterns, CaCO3 data and spectral gamma-ray (GRS) logs, are well correlated in the regional context and point to third-order eustatic sea-level fluctuations.The SR data, backed up by GRS, MS and CaCO3 data indicate that the red colour in the Pragian hemipelagic limestones originated from early diagenetic hematite precipitation under the conditions of an oxygenated ocean floor and deep-sea bottom oxygenation may have been in operation during Devonian.
    Trvalý link: http://hdl.handle.net/11104/0184945