Integrated stratigraphy of an offshore succession influenced by intense siliciclastic supply: Implications for Coniacian tectono-sedimentary evolution of the West Sudetic area (NW Bohemian Cretaceous Basin, Czech Republic)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10397282" target="_blank" >RIV/00216208:11310/19:10397282 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=aje5n_Wis~" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=aje5n_Wis~</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cretres.2019.06.005" target="_blank" >10.1016/j.cretres.2019.06.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Integrated stratigraphy of an offshore succession influenced by intense siliciclastic supply: Implications for Coniacian tectono-sedimentary evolution of the West Sudetic area (NW Bohemian Cretaceous Basin, Czech Republic)

Popis výsledku v původním jazyce

We present the interpretation of tectono-sedimentary evolution of the West Sudetic area (central Europe) during the latest Turonian-middle Coniacian as recorded by deposits of the NW part of the Bohemian Cretaceous Basin. This paper provides the first strontium isotope curve from the Upper Cretaceous of the Bohemian Massif. The exact stratigraphic framework was provided by combining of macrofossils (inoceramids) and calcareous nannofossils. Six inoceramid zones were distinguished, from Cremnoceramus deformis erectus Zone to Volviceramus koeneni Zone. Biostratigraphic data were combined with XRF curves and geophysical logs which allowed for correlation of several key sections within the study area. Using the genetic stratigraphy, contrasting parts of the depositional system interpreted as nearshore to deltaic were successfully correlated. Six elementary sequences were defined within the studied succession. These are TUR 7 (latest Turonian), backstepping, aggradation-dominated, with a short-term progradational episode and CON 1 to 5 (early-middle Coniacian), deposited during a period of increasing depth through time. The progradational pattern is most typical for the CON 4 sequence. Intensified sediment supply resulting in pronounced progradation is also evidenced by increased siliciclastic influx to the offshore zone and resulting changes in calcareous nannofossil assemblages. Three major transgressive events are interpreted at the base of sequences: (1) CON 1 (close to the Turonian-Coniacian boundary); (2) CON 2 (near FO of Cremnoceramus crassus crassus); (3) CON 5. The transgressions were predominantly driven by basin-floor subsidence, although the transgression at the Turonian-Coniacian boundary and at the base of sequence CON 2 likely carried a component of eustatic sea-level rise. The accelerated basin-floor tectonic subsidence and source uplift in the NW part of BCB falls within the early Ilsede phase of the Late Cretaceous (&apos;Subhercynian&apos;) deformation of the Alpine foreland.

Název v anglickém jazyce

Integrated stratigraphy of an offshore succession influenced by intense siliciclastic supply: Implications for Coniacian tectono-sedimentary evolution of the West Sudetic area (NW Bohemian Cretaceous Basin, Czech Republic)

Popis výsledku anglicky

We present the interpretation of tectono-sedimentary evolution of the West Sudetic area (central Europe) during the latest Turonian-middle Coniacian as recorded by deposits of the NW part of the Bohemian Cretaceous Basin. This paper provides the first strontium isotope curve from the Upper Cretaceous of the Bohemian Massif. The exact stratigraphic framework was provided by combining of macrofossils (inoceramids) and calcareous nannofossils. Six inoceramid zones were distinguished, from Cremnoceramus deformis erectus Zone to Volviceramus koeneni Zone. Biostratigraphic data were combined with XRF curves and geophysical logs which allowed for correlation of several key sections within the study area. Using the genetic stratigraphy, contrasting parts of the depositional system interpreted as nearshore to deltaic were successfully correlated. Six elementary sequences were defined within the studied succession. These are TUR 7 (latest Turonian), backstepping, aggradation-dominated, with a short-term progradational episode and CON 1 to 5 (early-middle Coniacian), deposited during a period of increasing depth through time. The progradational pattern is most typical for the CON 4 sequence. Intensified sediment supply resulting in pronounced progradation is also evidenced by increased siliciclastic influx to the offshore zone and resulting changes in calcareous nannofossil assemblages. Three major transgressive events are interpreted at the base of sequences: (1) CON 1 (close to the Turonian-Coniacian boundary); (2) CON 2 (near FO of Cremnoceramus crassus crassus); (3) CON 5. The transgressions were predominantly driven by basin-floor subsidence, although the transgression at the Turonian-Coniacian boundary and at the base of sequence CON 2 likely carried a component of eustatic sea-level rise. The accelerated basin-floor tectonic subsidence and source uplift in the NW part of BCB falls within the early Ilsede phase of the Late Cretaceous (&apos;Subhercynian&apos;) deformation of the Alpine foreland.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Cretaceous Research

ISSN

0195-6671

e-ISSN

—

Svazek periodika

102

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

33

Strana od-do

127-159

Kód UT WoS článku

000482250300010

EID výsledku v databázi Scopus

2-s2.0-85068859046