Sea-level changes vs. organic productivity as controls on Early
and Middle Devonian bioevents: Facies- and gamma-ray based
sequence-stratigraphic correlation of the Prague Basin, Czech
Republic

J 2018

Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic

BÁBEK, Ondřej; Martin FAMĚRA; Daniel ŠIMÍČEK; Hedvika WEINEROVÁ; Jindřich HLADIL et al.

Základní údaje

Originální název

Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic

Autoři

BÁBEK, Ondřej; Martin FAMĚRA; Daniel ŠIMÍČEK; Hedvika WEINEROVÁ; Jindřich HLADIL a Jiří KALVODA

Vydání

Global and Planetary Change, Amsterdam, ELSEVIER SCIENCE BV, 2018, 0921-8181

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10508 Physical geography

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.100

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/18:00107792

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Devonian; Carbonates; Sequence stratigraphy; Bioevents; Eustatic cyclicity; Palaeoclimatology

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 1. 4. 2020 15:27, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The Devonian marine stratigraphic record is characterized by a number of bioevents overturns in pelagic and benthic faunal assemblages, which are associated with distinct changes in lithology. The coincidence of litho logic and biotic changes can be explained by the causal link between biotic evolution, carbonate production and relative sea-level changes. To gain insight into the sea-level history of Early and Middle Devonian bioevents (the Lochkovian/Pragian Event, Basal Zlichovian E., Daleje E., and Chotec E.) we carried out a sequence-stratigraphic analysis of carbonate-dominated successions in the Prague Basin (peri-Gondwana), a classic area of Devonian bioevents. The study is based on a basin-wide correlation of facies and field gamma-ray spectrometry (GRS) logs from 18 sections (Lochkovian to Eifelian), supported by element geochemistry and published biostratigraphic and carbon isotope data. Devonian carbonate deposition in the Prague Basin alternated between two end member modes: an oligotrophic, homoclinal ramp (Praha and Daleje-Trebotov Formations) and a mesotrophic, distally steepened ramp (Lochkov, Zlichov, and Chotec Formations). They show contrasting facies, particularly the absence/presence of gravity-flow deposits, allochem composition, U/Th ratios, and geochemical composition (productivity proxies such as P/Al, Si/Al, Zn/Al, TOC and stable carbon isotopes). The mesotrophic systems reflect an increased availability of nutrients on the shelf during the late Lochkovian, early Emsian (Zlichovian), and Eifelian periods when sea surface temperature, pCO(2), and silicate weathering rates ware higher. The oligotrophic systems deposited during the Pragian to-earliest Emsian and late Emsian (Dalejan) periods reflect reversed palaeoclimatic trends. We identified three depositional sequences (DS), DS1 (base of Pragian to early Emsian); DS2 (early Emsian to mid Emsian); and DS3 (mid Emsian to mid Eifelian). These sequences were integrated into a peri-Gondwana relative sea-level curve, which was then compared with the Euramerican sea level curve of Johnson et al. (1985). The bioevents coincided with several sequence stratigraphic surfaces, representing variable limbs of the relative sea-level curve. On the other hand, their conspicuous coincidence with the switching intervals between the colder oligotrophic and warmer mesotrophic modes suggests that organic production linked to global climate was the primary control on biotic overturns, while sea-level fluctuations may have only amplified its effects.

Návaznosti

GA14-18183S, projekt VaV

Název: Sekvenční stratigrafie devonských bioeventů - výkyvy mořské hladiny na přechodu od klimatického režimu greenhouse k icehouse

Investor: Grantová agentura ČR, Sekvenční stratigrafie devonských bioeventů – výkyvy mořské hladiny na přechodu od klimatického režimu greenhouse k icehouse

Citovat

BÁBEK, Ondřej; Martin FAMĚRA; Daniel ŠIMÍČEK; Hedvika WEINEROVÁ; Jindřich HLADIL a Jiří KALVODA. Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic. Global and Planetary Change. Amsterdam: ELSEVIER SCIENCE BV, 2018, roč. 160, JAN, s. 75-95. ISSN 0921-8181. Dostupné z: https://doi.org/10.1016/j.gloplacha.2017.11.009.

@article{1580342,
   author = {Bábek, Ondřej and Faměra, Martin and Šimíček, Daniel and Weinerová, Hedvika and Hladil, Jindřich and Kalvoda, Jiří},
   article_location = {Amsterdam},
   article_number = {JAN},
   doi = {https://doi.org/10.1016/j.gloplacha.2017.11.009},
   keywords = {Devonian; Carbonates; Sequence stratigraphy; Bioevents; Eustatic cyclicity; Palaeoclimatology},
   language = {eng},
   issn = {0921-8181},
   journal = {Global and Planetary Change},
   title = {Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic},
   url = {https://www.sciencedirect.com/science/article/pii/S0921818117303089},
   volume = {160},
   year = {2018}
}

TY  - JOUR
ID  - 1580342
AU  - Bábek, Ondřej - Faměra, Martin - Šimíček, Daniel - Weinerová, Hedvika - Hladil, Jindřich - Kalvoda, Jiří
PY  - 2018
TI  - Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic
JF  - Global and Planetary Change
VL  - 160
IS  - JAN
SP  - 75-95
EP  - 75-95
PB  - ELSEVIER SCIENCE BV
SN  - 09218181
KW  - Devonian
KW  - Carbonates
KW  - Sequence stratigraphy
KW  - Bioevents
KW  - Eustatic cyclicity
KW  - Palaeoclimatology
UR  - https://www.sciencedirect.com/science/article/pii/S0921818117303089
L2  - https://www.sciencedirect.com/science/article/pii/S0921818117303089
N2  - The Devonian marine stratigraphic record is characterized by a number of bioevents overturns in pelagic and benthic faunal assemblages, which are associated with distinct changes in lithology. The coincidence of litho logic and biotic changes can be explained by the causal link between biotic evolution, carbonate production and relative sea-level changes. To gain insight into the sea-level history of Early and Middle Devonian bioevents (the Lochkovian/Pragian Event, Basal Zlichovian E., Daleje E., and Chotec E.) we carried out a sequence-stratigraphic analysis of carbonate-dominated successions in the Prague Basin (peri-Gondwana), a classic area of Devonian bioevents. The study is based on a basin-wide correlation of facies and field gamma-ray spectrometry (GRS) logs from 18 sections (Lochkovian to Eifelian), supported by element geochemistry and published biostratigraphic and carbon isotope data. Devonian carbonate deposition in the Prague Basin alternated between two end member modes: an oligotrophic, homoclinal ramp (Praha and Daleje-Trebotov Formations) and a mesotrophic, distally steepened ramp (Lochkov, Zlichov, and Chotec Formations). They show contrasting facies, particularly the absence/presence of gravity-flow deposits, allochem composition, U/Th ratios, and geochemical composition (productivity proxies such as P/Al, Si/Al, Zn/Al, TOC and stable carbon isotopes). The mesotrophic systems reflect an increased availability of nutrients on the shelf during the late Lochkovian, early Emsian (Zlichovian), and Eifelian periods when sea surface temperature, pCO(2), and silicate weathering rates ware higher. The oligotrophic systems deposited during the Pragian to-earliest Emsian and late Emsian (Dalejan) periods reflect reversed palaeoclimatic trends. We identified three depositional sequences (DS), DS1 (base of Pragian to early Emsian); DS2 (early Emsian to mid Emsian); and DS3 (mid Emsian to mid Eifelian). These sequences were integrated into a peri-Gondwana relative sea-level curve, which was then compared with the Euramerican sea level curve of Johnson et al. (1985). The bioevents coincided with several sequence stratigraphic surfaces, representing variable limbs of the relative sea-level curve. On the other hand, their conspicuous coincidence with the switching intervals between the colder oligotrophic and warmer mesotrophic modes suggests that organic production linked to global climate was the primary control on biotic overturns, while sea-level fluctuations may have only amplified its effects.
ER  -

BÁBEK, Ondřej; Martin FAMĚRA; Daniel ŠIMÍČEK; Hedvika WEINEROVÁ; Jindřich HLADIL a Jiří KALVODA. Sea-level changes vs. organic productivity as controls on Early and Middle Devonian bioevents: Facies- and gamma-ray based sequence-stratigraphic correlation of the Prague Basin, Czech Republic. \textit{Global and Planetary Change}. Amsterdam: ELSEVIER SCIENCE BV, 2018, roč.~160, JAN, s.~75-95. ISSN~0921-8181. Dostupné z: https://doi.org/10.1016/j.gloplacha.2017.11.009.

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