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Celadonite and saponite nodules from Tertiary volcanic breccia of Račí vrch Hill, České středohoří Mts
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SYSNO ASEP 0145719 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Celadonite and saponite nodules from Tertiary volcanic breccia of Račí vrch Hill, České středohoří Mts Author(s) Melka, Karel (GLU-S) SAI
Novák, Jiří Karel (GLU-S) RID, SAI
Ulrych, Jaromír (GLU-S) RID, SAI
Wiesner, T. (CZ)Source Title Acta Universitatis Carolinae. Geologica - ISSN 0001-7132
Roč. 44, - (2000), s. 109-117Number of pages 9 s. Language eng - English Country CZ - Czech Republic Keywords celadonite ; saponite ; Ohře Rift Subject RIV DB - Geology ; Mineralogy R&D Projects RK99P03OMG035 GA MK - Ministry of Culture (MK) CEZ AV0Z3013912 - GLU-S EID SCOPUS 0037741366 Annotation A small volcano of the Račí vrch Hill near Krásné Březno has erupted basaltic volcanic breccia and a columnar basanitic neck (26.7 Ma in age). This locality is attractive for conspicuous green-coloured clay mineral nodules, 1-7 cm in size, and for aragonite crystals hosting in volcanic breccia. Spongy textured celadonite (1M polytype with well ordered structure), Fe-rich saponite with a subordinate mixed-layer phase of the celadonite/smectite series were identified as replacements after mantle xenoliths containing altered olivine, ferromagnesian minerals, and volcanic glass. As concluded in the discussion, any geological environment cannot be the only criterion for the differentiation of celadonite, Al-rich celadonite and glauconite. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2004
Number of the records: 1