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Fluid inclusion study of pegmatites from Skalsko near Jílové and Dolní Bory
Fenclová, Kateřina ; Zachariáš, Jiří (advisor) ; Ackerman, Lukáš (referee)
Fluid inclusions of pegmatites from two localities in the Moldanubina Zone were studied in order to constrain P-T conditions of their crystallization and enstablish composition and properties of fluids associated with pegmatite formation. The first locality Skalsko (near Jílové u Prahy) is located within the Central Bohemian Plutonic Complex (CBPC) of Variscian age.Pegmatitic dykes represent the late stage of magmatic evolution of the CBPC. Pegmatite is hosted by biotite-granodiorite of the "Požáry" and "Sázava" types and probably belongs to the muscovite class of the pegmatites. The other locality, Dolní Bory, is located within the Bory granullite Massif ( metamorphism is dated to about 340 Ma). Following types of pegmatite occur in this district: 1. barren to less evolved pegmatites; 2. more evolved phosphate-bearing pegmatites and 3. Li-complex, the most evolved pegmatites. The studied material comes from an andalusite-diaspore nodule hosted by blocky quartz of the barren pegmatite (pegmatite dike No. 3). Fluid inclusions were studied mostly in quartz (Skalsko, Dolní Bory), andalusite and diaspore (Dolní Bory). Fluids trapped in samples from Skalsko correspond to H2O-CO2 and H2O types. The H2O-CO2 fluid had relatively low salinity (4,1-5,9 wt.% NaCleq), contained from 20 to 5 mol.% CO2 and its...
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Fluid inclusion study of pegmatites from Skalsko near Jílové and Dolní Bory
Fenclová, Kateřina ; Zachariáš, Jiří (advisor) ; Ackerman, Lukáš (referee)
Fluid inclusions of pegmatites from two localities in the Moldanubina Zone were studied in order to constrain P-T conditions of their crystallization and enstablish composition and properties of fluids associated with pegmatite formation. The first locality Skalsko (near Jílové u Prahy) is located within the Central Bohemian Plutonic Complex (CBPC) of Variscian age.Pegmatitic dykes represent the late stage of magmatic evolution of the CBPC. Pegmatite is hosted by biotite-granodiorite of the "Požáry" and "Sázava" types and probably belongs to the muscovite class of the pegmatites. The other locality, Dolní Bory, is located within the Bory granullite Massif ( metamorphism is dated to about 340 Ma). Following types of pegmatite occur in this district: 1. barren to less evolved pegmatites; 2. more evolved phosphate-bearing pegmatites and 3. Li-complex, the most evolved pegmatites. The studied material comes from an andalusite-diaspore nodule hosted by blocky quartz of the barren pegmatite (pegmatite dike No. 3). Fluid inclusions were studied mostly in quartz (Skalsko, Dolní Bory), andalusite and diaspore (Dolní Bory). Fluids trapped in samples from Skalsko correspond to H2O-CO2 and H2O types. The H2O-CO2 fluid had relatively low salinity (4,1-5,9 wt.% NaCleq), contained from 20 to 5 mol.% CO2 and its...
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