Podrobnosti záznamu

Název
    The Main Ostrava Whetstone: composition, sedimentary processes, palaeogeography and geochronology of a major Mississippian volcaniclastic unit of the Upper Silesian Basin (Poland and Czech Republic)
Autor
    Hýlová, L.
    Jirásek, J.
    Jureczka, J.
    Martínek, K.
    Schmitz, M.
    Sivek, M.
    Sýkorová, Ivana
Jazyk
    anglicky
Typ dokumentu
    článek v odborném periodiku
Zdrojový dokument - seriál
    International Journal of Earth Sciences
Svazek/č.
    Roč. 102, č. 4
Strany
    s. 989-1006
Rok
    2013
Poznámky
    Rozsah: 18 s. : P
Předmětová kategorie
    Carboniferous
    chronostratigraphy
    sedimentology
Klíčové slovo
    Basin
    Composition
    Czech
    Geochronology
    Main
    Major
    Mississippian
    Ostrava
    Palaeogeography
    Poland
    Processes
    Republic
    Sedimentary
    Silesian
    Unit
    Upper
    Volcaniclastic
    Whetstone
Abstrakt (anglicky)
   The Main Ostrava Whetstone (MOW) is an important lithostratigraphic horizon of the Late Carboniferous sedimentary fill of the late Palaeozoic foreland Upper Silesian Basin. It is the largest and best-identified volcanogenic horizon in the basin, reaching thicknesses of 15.3 m and occupying an area of ca 2,973 km(2) and a volume after lithification of 9.24 km(3). It consists of volcanic materials transported to the basin probably by an aeolian process. Just after sedimentation, these materials were redeposited a short distance away in a shallow water environment. Granularity corresponds to a range from argillaceous siltstones to fine-grained sandstones. The components are dominated by glass shards replaced by clay minerals (mixed illite-smectite structures) in addition to quartz of volcanogenic and terrigenous origins. Sanidine and a plagioclase close to albite are also present.
   The sedimentary structures, micro-structures and composition of the MOW indicate variable and dynamic hydrodynamic conditions. The MOW represents a series of flooding events, which could be connected with unusual rainfall. Such major flooding events were most likely induced by volcanic eruptions. The available drill-core log data were used to construct a digital model of the whetstone, which showed an east-west zonality in the thicknesses, with the majority being synsedimentary. CA-TIMS U-Pb dating the volcanogenic zircons yields an age of 327.35 +/- A 0.15 Ma. The source location of the volcanogenic material is not clear; however, it is presumed to have been located in the west of the Upper Silesian Basin.
Přispěvatel
    AV ČR Brno, Ústav struktury minerálů a hornin
Kód přispěvatele
    AV ČR, ÚSMH
Zdrojový formát
    U
Datum importu
    24. 10. 2014