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Statements

Subject Item
n2:RIV%2F61989100%3A27350%2F14%3A86090119%21RIV15-MSM-27350___
rdf:type
skos:Concept n14:Vysledek
dcterms:description
Sideritové konkrece jsou známy z paralických i terestrických sedimentů hornoslezské pánve. Významný horizont nad 22. slojí svrchních sušských vrstev (westfal, pennsylvan) byl zkoumán geologickými, mineralogickými a geochemickými metodami. Sideritové konkrece jsou známy z paralických i terestrických sedimentů hornoslezské pánve. Významný horizont nad 22. slojí svrchních sušských vrstev (westfal, pennsylvan) byl zkoumán geologickými, mineralogickými a geochemickými metodami. Siderite concretion horizons are known both from the paralic and terrestrial sediments of the Upper Silesian Basin. Significant horizon above the No. 22 Coal Seam in the Upper Suchá Member of Karviná Fm. (Westphalian, Pennsylvanian) was investigated by geological, mineralogical and geochemical methods. Horizon is developed virtually in the whole area of the Upper Suchá Member, where geological documentation is available. It is hosted by grey claystones in the direct roof of the No. 22 Seam, which belongs to the freshwater Faunistic Horizon Group Hubert. Shape of the concretions is mostly ellipsoidal and lensoidal, tabular ones are also present. Their size usually ranges between X0 cm and 1 m. Concretions do not have internal layering, warping of the claystone layering around them was observed. Typical feature of concretions is presence of septarian cracks. Matrix of the concretions is formed almost purely by two populations of non-zoned Mg-Ca or Mg-rich siderite with dispersed quartz, mica and accessory minerals similar to surrounding claystones, i.e. apatite, zircon, monazite and TiO2 minerals. Septarian fissures are filled by two generations of carbonate with predominant dolomitic composition and beef (fibrous) structure. Older one has dark brown colour, younger is white. The 13C value of matrix siderite is +0.77 promile PDB and that of septarian dolomite -8.15 promile PDB, the 18O value of matrix siderite is -11.25 promile PDB and that of septarian dolomite -9.79 promile PDB. Siderite matrix data shows fractionation during diagenetic processes, while fissure carbonate represents post-sedimentary hydrothermal product. Dolomite isotope data are comparable to those of hydrothermal carbonate mineralization of Early Carboniferous of the Nízký Jeseník Mts. We interpret concretion horizon as sediment of internal part of large-scale freshwater lake. Concretions are very probably syncompactional and develop by pervasive growth mechanism.
dcterms:title
Siderite concretion horizon above the No. 22 Coal Seam in the Upper Suchá Member of the Czech part of the Upper Silesian Basin Pelokarbonátový horizont nad 22. slojí ve svrchních sušských vrstvách české části hornoslezské pánve Pelokarbonátový horizont nad 22. slojí ve svrchních sušských vrstvách české části hornoslezské pánve
skos:prefLabel
Siderite concretion horizon above the No. 22 Coal Seam in the Upper Suchá Member of the Czech part of the Upper Silesian Basin Pelokarbonátový horizont nad 22. slojí ve svrchních sušských vrstvách české části hornoslezské pánve Pelokarbonátový horizont nad 22. slojí ve svrchních sušských vrstvách české části hornoslezské pánve
skos:notation
RIV/61989100:27350/14:86090119!RIV15-MSM-27350___
n3:aktivita
n11:S
n3:aktivity
S
n3:cisloPeriodika
2
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n8:2136058 n8:6137792 n8:4962052
n3:druhVysledku
n12:J
n3:duvernostUdaju
n5:S
n3:entitaPredkladatele
n16:predkladatel
n3:idSjednocenehoVysledku
36056
n3:idVysledku
RIV/61989100:27350/14:86090119
n3:jazykVysledku
n17:cze
n3:klicovaSlova
mineralogy; sedimentology; septarian concretions; Late Carboniferous; Upper Silesian Basin
n3:klicoveSlovo
n4:Upper%20Silesian%20Basin n4:septarian%20concretions n4:mineralogy n4:Late%20Carboniferous n4:sedimentology
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[DCA5713BAB8E]
n3:nazevZdroje
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
n3:obor
n15:DB
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:rokUplatneniVysledku
n13:2014
n3:svazekPeriodika
22
n3:tvurceVysledku
Matýsek, Dalibor Osovský, Michal Gabrhelová, Pavla Jirásek, Jakub Sivek, Martin
s:issn
1211-0329
s:numberOfPages
10
n6:organizacniJednotka
27350