Palaeo-thermal and coalification history of Permo-Carboniferous sedimentary basins of Central and Western Bohemia, Czech Republic: first insights from apatite fission track analysis and vitrinite reflectance modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00511608" target="_blank" >RIV/61389005:_____/19:00511608 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/19:00511608 RIV/67985891:_____/19:00511608 RIV/00216208:11310/19:10405449

Výsledek na webu

<a href="http://www.geology.cz/bulletin/fulltext/1696_Suchy_190617.pdf" target="_blank" >http://www.geology.cz/bulletin/fulltext/1696_Suchy_190617.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3140/bull.geosci.1696" target="_blank" >10.3140/bull.geosci.1696</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Palaeo-thermal and coalification history of Permo-Carboniferous sedimentary basins of Central and Western Bohemia, Czech Republic: first insights from apatite fission track analysis and vitrinite reflectance modelling

Popis výsledku v původním jazyce

Thermal modelling using AFTA has shown that the Carboniferous sediments were subjected to maximum temperatures ranging from similar to 75 degrees C in the SW to more than similar to 120 degrees C in the NE, which generally concluded during pre-Triassic times. Thermal records show a gradual cooling between similar to 280-180 Ma, followed by a long Mesozoic to Cenozoic Period of thermal stability, during which time, the sediments resided at constant temperatures of similar to 50-75 degrees C. From similar to 30 Ma onwards, accelerated cooling and erosion occurred, resulting in the present-day exposure of rocks on the surface. The EASY%R-0 modelling of average VR values that range from 0.59% R-r in the SW to 0.77% R-r in the NE, predicted maximum palaeo-temperatures ranging from similar to 85 degrees C to -135 degrees C, respectively, these were attained soon after sediment deposition. A coalification grade of about 0.40-0.50% R-r characteristic of sub-bituminous coals, was already completed during the late Carboniferous and/or early Permian limes. Later post-Permian heating did not have any substantial impact on the maturation of Carboniferous organic matter. By combining VR thermal modelling with local stratigraphic information we provide evidence that the coalification process occurred very rapidly. A coalification grade of similar to 0.40% R-r was attained during 2-4 m.y. after peat deposition, or even earlier. In addition, abundant sub-bituminous coal clasts embedded within the Carboniferous strata suggest that coalification proceeded close to the surface. These data collectively imply extremely high thermal gradients that must have prevailed during the Permo-Carboniferous thermal climax. The syn-sedimentary volcanic and/or igneous activity combined with effects of heat advection due to hot fluids circulating through the strata could have accounted for this dramatic geothermal setting, which had vanished by the end of the Palaeozoic Era.

Název v anglickém jazyce

Palaeo-thermal and coalification history of Permo-Carboniferous sedimentary basins of Central and Western Bohemia, Czech Republic: first insights from apatite fission track analysis and vitrinite reflectance modelling

Popis výsledku anglicky

Thermal modelling using AFTA has shown that the Carboniferous sediments were subjected to maximum temperatures ranging from similar to 75 degrees C in the SW to more than similar to 120 degrees C in the NE, which generally concluded during pre-Triassic times. Thermal records show a gradual cooling between similar to 280-180 Ma, followed by a long Mesozoic to Cenozoic Period of thermal stability, during which time, the sediments resided at constant temperatures of similar to 50-75 degrees C. From similar to 30 Ma onwards, accelerated cooling and erosion occurred, resulting in the present-day exposure of rocks on the surface. The EASY%R-0 modelling of average VR values that range from 0.59% R-r in the SW to 0.77% R-r in the NE, predicted maximum palaeo-temperatures ranging from similar to 85 degrees C to -135 degrees C, respectively, these were attained soon after sediment deposition. A coalification grade of about 0.40-0.50% R-r characteristic of sub-bituminous coals, was already completed during the late Carboniferous and/or early Permian limes. Later post-Permian heating did not have any substantial impact on the maturation of Carboniferous organic matter. By combining VR thermal modelling with local stratigraphic information we provide evidence that the coalification process occurred very rapidly. A coalification grade of similar to 0.40% R-r was attained during 2-4 m.y. after peat deposition, or even earlier. In addition, abundant sub-bituminous coal clasts embedded within the Carboniferous strata suggest that coalification proceeded close to the surface. These data collectively imply extremely high thermal gradients that must have prevailed during the Permo-Carboniferous thermal climax. The syn-sedimentary volcanic and/or igneous activity combined with effects of heat advection due to hot fluids circulating through the strata could have accounted for this dramatic geothermal setting, which had vanished by the end of the Palaeozoic Era.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000728" target="_blank" >EF16_019/0000728: Výzkum ultrastopových izotopů a jejich využití v sociálních a environmentálních vědách urychlovačovou hmotnostní spektrometrií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Bulletin of Geosciences

ISSN

1214-1119

e-ISSN

—

Svazek periodika

94

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

19

Strana od-do

201-219

Kód UT WoS článku

000471678400005

EID výsledku v databázi Scopus

2-s2.0-85071151715