DOSTALÍKOVÁ, Lucie, Hana VALENTÍKOVÁ and Slavomír NEHYBA. Využití gamaspektrometrie při studiu spodnobadenských sedimentů ve vrtu 2241_B Brno-Černá Pole (Use of gamma-ray spectrometry for the study of Lower Badenian deposits in the borehole 2241_B Brno-Černá Pole). Geologické výzkumy na Moravě a ve Slezsku. Brno: Masarykova univerzita, 2017, vol. 24, 1-2, p. 7-12. ISSN 1212-6209. Available from: https://dx.doi.org/10.5817/GVMS2017-1-2-07.
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Basic information
Original name Využití gamaspektrometrie při studiu spodnobadenských sedimentů ve vrtu 2241_B Brno-Černá Pole
Name in Czech Využití gamaspektrometrie při studiu spodnobadenských sedimentů ve vrtu 2241_B Brno-Černá Pole
Name (in English) Use of gamma-ray spectrometry for the study of Lower Badenian deposits in the borehole 2241_B Brno-Černá Pole
Authors DOSTALÍKOVÁ, Lucie (203 Czech Republic, belonging to the institution), Hana VALENTÍKOVÁ (203 Czech Republic, belonging to the institution) and Slavomír NEHYBA (203 Czech Republic, guarantor, belonging to the institution).
Edition Geologické výzkumy na Moravě a ve Slezsku, Brno, Masarykova univerzita, 2017, 1212-6209.
Other information
Original language Czech
Type of outcome Article in a journal
Field of Study 10500 1.5. Earth and related environmental sciences
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
RIV identification code RIV/00216224:14310/17:00099058
Organization unit Faculty of Science
Doi http://dx.doi.org/10.5817/GVMS2017-1-2-07
Keywords (in Czech) karpatská předhlubeň;spodní baden;neogenní sedimenty;gamaspektrometrie;klastické sedimenty
Keywords in English Carpathian Foredeep;Lower Badenian;Neogene deposits;gamma ray logging;clastic sediments
Tags NZ, rivok
Changed by Changed by: Ing. Nicole Zrilić, učo 240776. Changed: 13/4/2018 08:22.
Abstract
Spodnobadenské sedimenty představují největší část výplně karpatské předhlubně. Nový vrt 2241_B Brno-Černá Pole poskytl téměř kompletní jádrová data a profil tmito sedimenty. V rámci spodnobadenských sedimentů naprosto dominovaly dvě facie tj. vápnité jíly (tégly) - metráž 20–167 m a dále podložní klastické “brněnské písky“ - metráž 167–236 m. Gamaspektrometrické studium celkem 418 vzorků z těchto sedimentů ukazuje významné rozdíly v koncentracích měřených radionuklidů a také ve zdroji jejich signálu.
Abstract (in English)
Lower Badenian deposits represent volumetrically significant part of the Carpathian Foredeep infill. New drilled borehole 2241_B Brno-Černá Pole recorded sedimentary profile of these deposits with an almost complete core data. Two different Lower Badenian facies were documented. The first facies of calcareous clays (Tegel) have been documented in depths 20–167 m. Calcareous clays cover underlying “Brno sands“, which represent the second lithofacies and were recorded in depths 167–236 m. Gamma-ray spectrometry was studied on 418 samples of both clays and sands. The results show significant differences in both concentrations and source of signal for these two lithofacies. Lower Badenian clays reveal in general relatively higher concentrations of Th and K than was recognised for Lower Badenian sands. However, concentrations of U are higher in Lower Badenian sands. Remarkable is unusually high U content in selected samples from “Brno sands” (which was also confirmed by supplementary XRF analyses). Whereas Lower Badenian clays were deposited in mostly oxidic condition, deposition of “Brno sands” reveals more reducing conditions. The value Th/K points to varying mineralogy of clays, which is preliminary connected with alternation of more or less humid/arid climatic phases during Lower Badenian. Similar differences within the Lower Badenian sands are explained by source area variations.
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