title: Micas from mariupolite of the Oktiabrski massif (SE Ukraine): an insight into the host rock evolution--geochemical data supported by Raman microspectroscopy.
abstract: Muscovite and two dark mica varieties (the coarse-crystalline, pegmatitic, and fine-crystalline with signs of early weathering) representing members of the biotite series, originating from mariupolite of the Oktiabrski massif, (Ukraine), were investigated along with their solid inclusions using electron microprobe and Raman micro-spectroscopy to discuss their genesis and relationship to the parental magma. The coarse-crystalline, pegmatitic biotite, (K1.90Rb0.02Na0.01)(Fe3.56(2+)Mg1.34Ti0.36Fe0.34(3+)Mn0.03)[(Si5.73Al2.10Fe0.17(3+))O20](OH3.24 F0.76) represents the primary, magmatic annite that crystallized from an alkaline, Fe-rich and Mg-depleted host magma, whereas the fine-crystalline biotite, partly altered to vermiculite, (K1.75Rb0.03Na0.03)(Fe3.23(3+)Fe1.16(2+)Mg0.26Mn0.04Ti0.10)[(Si5.16 Al2.84)O20](OH)4.00, devoid of F, represents a re-equilibrated or secondary, post-magmatic Fe(3+)-bearing mica crystallized from alkaline to the subalkaline host magma. Muscovite, (K1.96Na0.06)(Al3.97Fe0.06(2+))[(Si5.99Al2.01)O20](OH)4, with low Na/(Na+K) ratio, low Fe and devoid of Ti and also F, forms only tiny, subhedral flakes formed in the post-magmatic, hydrothermal stage. The primary, unaltered biotite contains numerous solid inclusions of primary origin (albite, aegirine, zircon, K-feldspar, nepheline, pyrochlore, magnetite) and secondary origin (natrolite, hematite, Ti-Mn oxides/hydroxides); most of them are accompanied by a carbonaceous substance, all confirmed by scanning electron microscopy and Raman microspectroscopy.
authors.affiliation: Faculty of Geology, Geophysics and Environmental Protection, Department of Mineralogy, Petrography and Geochemistry, AGH - University of Science and Technology, 30 Mickiewicza Av., 30-059 Kraków, Poland. Electronic address: dumanska@uci.agh.edu.pl.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Dumańska-Słowik
authors.affiliation: Faculty of Chemistry, Jagiellonian University, 3 Ingardena Str., 30-060 Kraków, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Wesełucha-Birczyńska
authors.affiliation: Faculty of Geology, Geophysics and Environmental Protection, Department of Mineralogy, Petrography and Geochemistry, AGH - University of Science and Technology, 30 Mickiewicza Av., 30-059 Kraków, Poland.
authors.forename: Adam
authors.initials: A
authors.lastname: Pieczka
mesh_terms: D000535:Aluminum / Q000737:chemistry; D000538:Aluminum Silicates / Q000737:chemistry*; D003460:Crystallization; D004577:Electron Probe Microanalysis; D005844:Geology; D008345:Manganese / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D008903:Minerals / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014025:Titanium / Q000737:chemistry; D014455:Ukraine
chemical_list: D000538:Aluminum Silicates; D008903:Minerals; D008345:Manganese; D000535:Aluminum; D014025:Titanium; C011934:mica
keywords: Biotite; Muscovite; Oktiabrski massif; Solid inclusions; Ukraine