Minerogeneze páskovaných magnetitových rud na lokalitě Mnišské jámy v desenské skupině silesika

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Title in English Minerogenesis of the banded magnetite ores from the Mnišské jámy locality in the Desná Group of the Silesicum
Authors

PRINZOVÁ Eva LOSOS Zdeněk

Year of publication 2000
Type Article in Proceedings
Conference Mineralogicko-petrologické sympózium Magurka 2000
MU Faculty or unit

Faculty of Science

Citation
Field Geology and mineralogy
Keywords banded magnetite ore; Desná Group; Silesicum
Description Banded quartz-magnetite ores placed conformably to the foliation of retrogradely metamorphosed gneisses of the Desná-group occur in the Mnišské jámy locality.Direct participation of volcanic basic material in forming of banded magnetite ores and protolite of neighbouring gneisses is probable. We can even think of bimodal volcanism if the layer of quarzitic gneiss corresponds to metamorphosed acid volcanic material. With regard to a possible portion of some clastic components in the ore, its origin in magmatogenic apatite and magnetite from sands can be considered too.
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