Počet záznamů: 1
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
- 1.
SYSNO ASEP 0511608 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 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 Tvůrce(i) Suchý, Václav (UJF-V) ORCID, SAI, RID
Filip, Jiří (GLU-S) RID, SAI
Sýkorová, Ivana (USMH-B) RID, ORCID
Pešek, J. (CZ)
Kořínková, Dagmar (GLU-S) RID, SAICelkový počet autorů 5 Zdroj.dok. Bulletin of Geosciences. - : Česká geografická společnost - ISSN 1214-1119
Roč. 94, č. 2 (2019), s. 201-219Poč.str. 19 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova coalification ; organic matter diagenesis ; geothermal gradient ; heat flow evolution ; Variscan orogeny ; Bohemian Massif Vědní obor RIV CB - Analytická chemie, separace Obor OECD Analytical chemistry Vědní obor RIV – spolupráce Geologický ústav - Geologie a mineralogie
Ústav struktury a mechaniky hornin - GeochemieCEP EF16_019/0000728 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UJF-V - RVO:61389005 ; GLU-S - RVO:67985831 ; USMH-B - RVO:67985891 UT WOS 000471678400005 EID SCOPUS 85071151715 DOI 10.3140/bull.geosci.1696 Anotace 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. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2020 Elektronická adresa http://www.geology.cz/bulletin/fulltext/1696_Suchy_190617.pdf
Počet záznamů: 1