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@article{1824019,
author = {Slobodník, Marek and Všianský, Dalibor and Slavíček, Karel and Poláčková, Marie and Huzlík, Jiří},
article_number = {1-2},
doi = {http://dx.doi.org/10.5817/GVMS2021-15627},
keywords = {Moravo-Silesian Palaeozoic; carbonate strata; black carbonaceous matter; deformation structures; Raman spectra; disordered carbon; organic matter; temperatures},
language = {cze},
issn = {1212-6209},
journal = {Geologické výzkumy na Moravě a ve Slezsku},
title = {Neuspořádaný uhlík v tektonických zónách paleozoických sedimentů (devon moravskoslezského paleozoika)},
url = {https://journals.muni.cz/gvms/article/view/15627/16403},
volume = {28},
year = {2021}
}
TY - JOUR
ID - 1824019
AU - Slobodník, Marek - Všianský, Dalibor - Slavíček, Karel - Poláčková, Marie - Huzlík, Jiří
PY - 2021
TI - Neuspořádaný uhlík v tektonických zónách paleozoických sedimentů (devon moravskoslezského paleozoika)
JF - Geologické výzkumy na Moravě a ve Slezsku
VL - 28
IS - 1-2
SP - 73-84
EP - 73-84
PB - Masarykova univerzita
SN - 12126209
KW - Moravo-Silesian Palaeozoic
KW - carbonate strata
KW - black carbonaceous matter
KW - deformation structures
KW - Raman spectra
KW - disordered carbon
KW - organic matter
KW - temperatures
UR - https://journals.muni.cz/gvms/article/view/15627/16403
N2 - Dark carbonaceous matter staining tectonic zones and deformed carbonate strata of the Moravo-Silesian Palaeozoic were studied by several methods. Samples were taken from tectonic structures in the quarry in Čebín and in the middle quarry in Mokrá near Brno. The grey-black-coloured rocks are clearly macroscopically and microscopically deformed, show traces of brittle ductile shear deformation and with foliation developed. The dark colour is caused by the presence of black carbon matter, which is documented by methods of optical and electron (BSE) microscopy and Raman spectra. The mineral assemblage has the character of hydrothermal mineralization migrating along tectonic structures. Mineralization consists mainly of quartz, carbonates (calcite, dolomite), phyllosilicates (mica, chlorite, kaolinite), pyrite and it also includes black carbon. Apatite is one of the interesting and unusual components. The content of organic and elemental carbon determined by the thermo-optical method in intensively mineralized zones is around 2.5 mass %. The carbonaceous matter was more accurately identified using Raman spectra. The spectra at the two studied localities have a very similar shape and are very close to the spectra of black carbon in low-grade carbon coal matter, very disordered carbon and/or amorphous carbon (coal, kerogen). The spectra show the presence of peaks in the D, G and 2D regions and are different from the spectra of ordered and disordered graphite. The presence of a small peak G in the analysed spectra (Lorentzian function) also indicates the possible presence of a small amount of more ordered carbon in the studied black carbon matter. The components of the black mineralized zones were most likely mobilized from the surrounding rock formations during the Variscan tectono-metamorphic events. The similarity with the spectra of poorly ordered carbon matter from low metamorphic conditions shows transformation temperatures of 150–280 °C, which is in accordance with other thermometric methods in the region of the southern edge of the Moravo-Silesian Palaeozoic.
ER -
SLOBODNÍK, Marek, Dalibor VŠIANSKÝ, Karel SLAVÍČEK, Marie POLÁČKOVÁ and Jiří HUZLÍK. Neuspořádaný uhlík v tektonických zónách paleozoických sedimentů (devon moravskoslezského paleozoika) (Disodered carbon in tectonic zones of the Palaeozoic sediments (Devonian of the Moravosilesian Palaeozoic)). \textit{Geologické výzkumy na Moravě a ve Slezsku}. Masarykova univerzita, 2021, vol.~28, 1-2, p.~73-84. ISSN~1212-6209. Available from: https://dx.doi.org/10.5817/GVMS2021-15627.
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