Geology and thermal maturity of autochthonous Upper Cretaceous deposits on the southeastern margin of the Bohemian Massif

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169872" target="_blank" >RIV/00025798:_____/25:10169872 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14310/25:00143529 RIV/61989100:27350/25:10259559

Result on the web

<a href="https://doi.org/10.31577/GeolCarp.2025.25" target="_blank" >https://doi.org/10.31577/GeolCarp.2025.25</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.31577/GeolCarp.2025.25" target="_blank" >10.31577/GeolCarp.2025.25</a>

Result language

angličtina

Original language name

Geology and thermal maturity of autochthonous Upper Cretaceous deposits on the southeastern margin of the Bohemian Massif

Original language description

Knowledge of deposits of the Klement Formation (Upper Cretaceous) has been deriven solely from subsurface data in the southern Moravian territory of the Czech Republic. These deposits were deposited on a passive margin of the Neo-Tethys Ocean and a seaway continuation into the Bohemian Cretaceous Basin towards the north and northwest. Three recognised facies associations provide evidence of lower to middle shoreface to offshore depositional environments with role of storm events. Palynological studies of the deposits indicate a Late Albian age, which connect them with the initial Cretaceous transgression (Albian-Lower Cenomanian) onto the Bohemian Massif. The provenance from the eastern margin of the Bohemian Massif is proved and some potential source areas are evaluated. The principal and proximal source can be located in the Moravo-Silesian Zone (Brunovistulicum), which compose the crystalline basement of the Mesozoic deposits. More distant sources can be traced to the Moravian and Moldanubian units or to even more distant sources such as the Teplá-Barrandian or Lugicum units. A remarkable difference in provenance has been recognised when compared with the clastic Jurassic deposits of the Gresten and Nikolčice Formations known from the area under study. The base of the Klement Formation represents a composite, polyhistory surface and subaerial unconformity. The thicknesses of Cretaceous Klement Formation deposits is generally increasing eastwardly pointing to the general increase in basin depth in this direction. According to the Rock-Eval pyrolysis, organic matter was classified as kerogen type III. Based on parameter Tmax thermal maturity of the Klement Formation corresponds to immature stage which means that the sediments were not exposed to temperatures greater than 50 oC. The absence of a depth trend in thermal maturity suggests that the original position of the evaluated samples was changed tectonically and that burial to maximum depth occurred before the overthrust or the Western Carpathians.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10505 - Geology

Project

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Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2025

Confidentiality

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

Name of the periodical

Geologica Carpathica

ISSN

1335-0552

e-ISSN

1336-8052

Volume of the periodical

76

Issue of the periodical within the volume

6

Country of publishing house

SK - SLOVAKIA

Number of pages

25

Pages from-to

459-483

UT code for WoS article

001677488900004

EID of the result in the Scopus database

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