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

0342126 - GLÚ 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. E-ISSN 1879-0968
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