Introduction
Periodicals
Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze
2011/19/1
Chemická variabilita granitu typu Černá kočka čisteckého masivu
Chemická variabilita granitu typu Černá kočka čisteckého masivu
Josef Franče, Ferry Fediuk
| Pages | 42-46 |
|---|---|
| Citation | FRANČE, Josef a FEDIUK, Ferry. Chemická variabilita granitu typu Černá kočka čisteckého masivu. Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Prague: National Museum, 2011, 19(1), 42-46. ISSN 1211-0329 (print), 1804-6495 (online). Also available from: https://publikace.nm.cz/en/periodicals/bmpholnrhmvp/19-1/chemicka-variabilita-granitu-typu-cerna-kocka-cisteckeho-masivu |
The Černá kočka muscovite alkali feldspar granite, occurring on the SE border of the Čistá granitoide massif, has been hitherto chemically characterized by a single analysis only. The present contribution, using 46 new unpublished chemical analyses from a technological report, offers in a series of diagrams a comprehensive petrochemical characteristic of this rather exceptional. rock and compares it with the previous published analysis. The Černá kočka granite differs markedly from the main granitoid types of the Čistá-Jesenice Pluton (the Tis granite, Petrohrad granodiorite, Čistá central and Čistá peripheral granodiorite) by its specific geochemistry (namely high-K character, higher SiO2 and alkalis and extremely low TiO2, Fe2O3 tot , MgO and CaO contents), by its mineralogy (especially by the absence of biotite and the presence of albite and ± tourmaline) and by its autonomous geological setting and by the supposed younger age of the emplacement.
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