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

J 2010

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

KOPTIKOVA, Leona, Ondřej BÁBEK, Jindřich HLADIL, Jiří KALVODA, Ladislav SLAVIK et. al.

Basic information

Original name

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

Authors

KOPTIKOVA, Leona, Ondřej BÁBEK (203 Czech Republic, guarantor, belonging to the institution), Jindřich HLADIL (203 Czech Republic, belonging to the institution), Jiří KALVODA (203 Czech Republic, belonging to the institution) and Ladislav SLAVIK

Edition

Sedimentary Geology, Amsterdam, Elsevier Science, 2010, 0037-0738

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10505 Geology

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.685

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1016/j.sedgeo.2010.01.004

UT WoS

000277076200001

Keywords in English

VIS spectral reflectance; Cyclostratigraphy; Sea-level changes; Lower Devonian; Red pelagic carbonates; Diagenesis

Abstract

V originále

Spectral reflectance (SR) is a relatively novel technique which is used as a proxy for organic carbon and siliciclastic input in carbonate sediments, in particular in core research 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. CaCO(3) data and spectral gamma-ray (CRS) logs, are well correlated in the regional context and point to third-order eustatic sea-level fluctuations. Peak regressions of the TR cycles are sensitively marked by CIE L*a*b* parameters and percent reflectance in colour bands The SR and magnetic susceptibility (MS) data are markedly cyclic on a more detailed scale. Their inferred periods vary between 49.2 and 205 kyr indicating that they may have been forced by orbital cycles in the Milankovitch band. The SR and MS cycles are either in phase or out of phase The latter cycles point to a strong diagenetic forcing of the colour cyclicity. Hematite concentration cycles, inferred from SR signal in the Pragian red hemipelagic carbonates, are interpreted as reflecting changing bottom oxygenation and subsurface redox gradients during early diagenesis. The CIE V parameter was found to be related to the presence of diagenetic hematite, which indicates that cyclostratigraphic analysis of simple greyscale data can be affected by considerable error due to chromacity Although the CIE L* parameter is partly correlated with CaCO(3) concentrations, the MS data are not, which suggests that the MS signal can be significantly influenced by diagenetic minerals and its cyclostratigraphic interpretation can be potentially misleading. The SR data, backed up by CRS. MS and CaCO(3) 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 This suggests that deep-sea bottom oxygentation may have been in operation during the early Devonian. which is traditionally perceived as a typical greenhouse period. The SR data can be obscured in several m thick zones of elevated CIE L* and other colour changes ("leaching zones") related to postdepositional alteration along subvertical faults, however, this fault-related telogenic alteration has little influence on the MS signal The combined use of SR and MS has a synergic effect and can significantly improve the interpretation of their respective cyclic signals, particularly in relation to the diagenetic overprint and possible carriers of the MS (C) 2010 Elsevier B.V. All rights reserved

Links

GA205/09/1257, research and development project

Name: Využití gamaspektrometrie při studiu provenience siliciklastických sedimentů

Investor: Czech Science Foundation, Application of gamma-ray spectrometry in provenance studies of siliciclastic sediments

MSM0021622412, plan (intention)

Name: Interakce mezi chemickými látkami, prostředím a biologickými systémy a jejich důsledky na globální, regionální a lokální úrovni (INCHEMBIOL) (Acronym: INCHEMBIOL)

Investor: Ministry of Education, Youth and Sports of the CR, Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)

Citovat

KOPTIKOVA, Leona, Ondřej BÁBEK, Jindřich HLADIL, Jiří KALVODA and Ladislav SLAVIK. 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. Amsterdam: Elsevier Science, 2010, vol. 225, 3-4, p. 83-98. ISSN 0037-0738. Available from: https://dx.doi.org/10.1016/j.sedgeo.2010.01.004.

@article{1661725,
   author = {Koptikova, Leona and Bábek, Ondřej and Hladil, Jindřich and Kalvoda, Jiří and Slavik, Ladislav},
   article_location = {Amsterdam},
   article_number = {3-4},
   doi = {http://dx.doi.org/10.1016/j.sedgeo.2010.01.004},
   keywords = {VIS spectral reflectance; Cyclostratigraphy; Sea-level changes; Lower Devonian; Red pelagic carbonates; Diagenesis},
   language = {eng},
   issn = {0037-0738},
   journal = {Sedimentary Geology},
   title = {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},
   url = {https://www.sciencedirect.com/science/article/pii/S0037073810000187},
   volume = {225},
   year = {2010}
}

TY  - JOUR
ID  - 1661725
AU  - Koptikova, Leona - Bábek, Ondřej - Hladil, Jindřich - Kalvoda, Jiří - Slavik, Ladislav
PY  - 2010
TI  - 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
JF  - Sedimentary Geology
VL  - 225
IS  - 3-4
SP  - 83-98
EP  - 83-98
PB  - Elsevier Science
SN  - 00370738
KW  - VIS spectral reflectance
KW  - Cyclostratigraphy
KW  - Sea-level changes
KW  - Lower Devonian
KW  - Red pelagic carbonates
KW  - Diagenesis
UR  - https://www.sciencedirect.com/science/article/pii/S0037073810000187
L2  - https://www.sciencedirect.com/science/article/pii/S0037073810000187
N2  - Spectral reflectance (SR) is a relatively novel technique which is used as a proxy for organic carbon and siliciclastic input in carbonate sediments, in particular in core research 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. CaCO(3) data and spectral gamma-ray (CRS) logs, are well correlated in the regional context and point to third-order eustatic sea-level fluctuations. Peak regressions of the TR cycles are sensitively marked by CIE L*a*b* parameters and percent reflectance in colour bands The SR and magnetic susceptibility (MS) data are markedly cyclic on a more detailed scale. Their inferred periods vary between 49.2 and 205 kyr indicating that they may have been forced by orbital cycles in the Milankovitch band. The SR and MS cycles are either in phase or out of phase The latter cycles point to a strong diagenetic forcing of the colour cyclicity. Hematite concentration cycles, inferred from SR signal in the Pragian red hemipelagic carbonates, are interpreted as reflecting changing bottom oxygenation and subsurface redox gradients during early diagenesis. The CIE V parameter was found to be related to the presence of diagenetic hematite, which indicates that cyclostratigraphic analysis of simple greyscale data can be affected by considerable error due to chromacity Although the CIE L* parameter is partly correlated with CaCO(3) concentrations, the MS data are not, which suggests that the MS signal can be significantly influenced by diagenetic minerals and its cyclostratigraphic interpretation can be potentially misleading. The SR data, backed up by CRS. MS and CaCO(3) 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 This suggests that deep-sea bottom oxygentation may have been in operation during the early Devonian. which is traditionally perceived as a typical greenhouse period. The SR data can be obscured in several m thick zones of elevated CIE L* and other colour changes ("leaching zones") related to postdepositional alteration along subvertical faults, however, this fault-related telogenic alteration has little influence on the MS signal The combined use of SR and MS has a synergic effect and can significantly improve the interpretation of their respective cyclic signals, particularly in relation to the diagenetic overprint and possible carriers of the MS (C) 2010 Elsevier B.V. All rights reserved
ER  -

KOPTIKOVA, Leona, Ondřej BÁBEK, Jindřich HLADIL, Jiří KALVODA and Ladislav SLAVIK. 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. \textit{Sedimentary Geology}. Amsterdam: Elsevier Science, 2010, vol.~225, 3-4, p.~83-98. ISSN~0037-0738. Available from: https://dx.doi.org/10.1016/j.sedgeo.2010.01.004.

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