1. Magnezio-riebeckit v mramoroch zo Šugovskej doliny pri Medzeve (Slovensko).
- Author
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RUŽIČKA, PETER, MICHÁLEK, MARTIN, and BAČÍK, PETER
- Subjects
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RIEBECKITE , *AMPHIBOLES , *IRON silicates , *MARBLE , *METAMORPHIC rocks - Abstract
This contribution describes the occurrence of magnesio-riebeckite in marbles from Šugov valley, near Medzev within Bôrka nappe, in Meliata unit (Slovak Republic). Magnezio-riebeckite belongs to high pressure mineral assemblage that was locally identified in studied samples of Šugov marbles. Šugov marbles consist of Cal + Qtz ± Mg-Rbk ± Chl ± Hem mineral assemblage. Based on AlIV and BNa content, the relative pressure estimation is 700 MPa assuming low temperatures around 350 - 450°C. Remnants of magnezio-riebeckite reflect and confirm high-pressure evolution of Bôrka nappe during subduction processes connected to closure of the Meliata Ocean in the Late Jurassic. [ABSTRACT FROM AUTHOR]
- Published
- 2014