Objev a genetický význam porfyrického alkalickoživcového mikrodioritu (dioritového porfyritu) v Olšanech na Drahanské vrchovině

• Title in English: Finding and genetic significance of porphyric alkali feldspar microdiorite (diorite porphyry)
• Authors: KRMÍČEK Lukáš; PŘICHYSTAL Antonín; HALAVÍNOVÁ Michaela
• Year of publication: 2006
• Type: Article in Periodical
• Magazine / Source: Geologické výzkumy na Moravě a ve Slezsku
• MU Faculty or unit: Faculty of Science
• Field: Geology and mineralogy
• Keywords: Bohemian Massif; Drahany Upland; Olšany quarry; porphyric microdiorite; chemical composition
• Description: Abstract From large area of Culmian sediments in the Drahany Upland we described first finding of magmatic dyke (lamprophyre/minette) at the village of Rozstání-Baldovec in the year 2005 (Krmíček - Přichystal 2005). Our second finding of magmatic dyke was ascertained in the active quarry at the village of Olšany. Using complex petrologic study we classified the rock as a porphyric alkali feldspar microdiorite. Chondrite normalized REE patterns for our dyke show good correlation with Hercynian lamprophyres at the eastern margin of the Bohemian Massif (Moravo-Silesian Region) and slightly different composition from porphyric microdiorites of the Brno Massif.

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