Podrobnosti záznamu

Název
    Celadonite and saponite nodules from Tertiary volcanic breccia of Račí vrch Hill, České středohoří Mts.
Údaj o odpovědnosti
    Karel Melka, Jiří K. Novák, Jaromír Ulrych, Tomáš Wiesner
    Melka K., Novák J.K., Ulrych J., Wiesner T.
Další názvy
    Sixteenth Conference on Clay Mineralogy and Petrology in Karlovy Vary (Czech Republic), August 27-31, 2000 (Variant.)
Autor
    Melka, Karel
    Melka, Karel, 1930-
    Novák, Jiří K.
    Novák, Jiří Karel
    Ulrych, Jaromír
    Ulrych, Jaromír, 1943-
    Wiesner, Tomáš
Jazyk
    anglicky
Zdrojový dokument - seriál
    Acta Universitatis Carolinae. Geologica
Svazek/č.
    Vol. 44, no. 2-4
Strany
    p. 109-116
    p. 109-116, 1 l. příl.
Rok
    2000
Poznámky
    6 obr., 6 tab., 2 pl., 29 bibl.
    6 obr. v textu, 2 pl. v příl.
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Acta Univ. Carol., Geol.
Klasifikační znak
    549
    552
Skupina konspektu
    549
    552
Předmětová skupina
    analýza termická
    bazanit
    brekcie vulkanická
    metoda prášková
    mikroanalýza elektronová
    minerály jílové
    saponit
    seladonit
    vulkanity Českého středohoří
Geografické jméno
    České středohoří
    ČR-Čechy
    Krásné Březno (Ústí nad Labem)
Klíčové slovo
    Breccia
    Celadonite
    České
    Hill
    Mts
    Nodules
    Račí
    Saponite
    Středohoří
    Tertiary
    Volcanic
    Vrch
Abstrakt (anglicky)
   The composite volcanic body of Račí vrch Hill near krásné Březno, occassionally hosting green-coloured nodules, 1-7 cm in size, originated from tephra-producing eruption, and a massive basanitic neck. Compositional variations of natural celadonite and Fe-rich saponite with subordinate mixed-layer phase of the celadonite/smectite series, present in the nodules, were investigated using X-ray diffraction, electron microprobe analysis and thermal analytical methods. A pure celadonite was identified as a 1M polytype with well ordered structure. In the celadonite/smectite interstratified phase, the amount of 15 percent of expandable (smectite) layers was determined. The thermal decomposition of the sample containing saponite confirmed its trioctahedral character. The composition of secondary phyllosilicates is strongly dependent on primary mineral composition.
   The (i) spongy textured celadonite probably originated from the interaction of altered olivine, volcanic glass and clinopyroxene with autohydrothermal solutions, (ii) composition of Fe-rich saponite was controlled by volcanic glass chemistry only. In addition to these mineral phases, calcite and/or aragonite developed during the autohydrothermal stage of the rock alteration

   The composite volcanic body of Račí vrch Hill near krásné Březno, occassionally hosting green-coloured nodules, 1-7 cm in size, originated from tephra-producing eruption, and a massive basanitic neck. Compositional variations of natural celadonite and Fe-rich saponite with subordinate mixed-layer phase of the celadonite/smectite series, present in the nodules, were investigated using X-ray diffraction, electron microprobe analysis and thermal analytical methods. A pure celadonite was identified as a 1M polytype with well ordered structure. In the celadonite/smectite interstratified phase, the amount of 15 percent of expandable (smectite) layers was determined. The thermal decomposition of the sample containing saponite confirmed its trioctahedral character. The composition of secondary phyllosilicates is strongly dependent on primary mineral composition.
   The (i) spongy textured celadonite probably originated from the interaction of altered olivine, volcanic glass and clinopyroxene with autohydrothermal solutions, (ii) composition of Fe-rich saponite was controlled by volcanic glass chemistry only. In addition to these mineral phases, calcite and/or aragonite developed during the autohydrothermal stage of the rock alteration
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    21. 3. 2008
    16. 4. 2008
Datum importu
    8. 8. 2012