Clay minerals from Permo-Carboniferous very low-grade metamorphic rocks from the central part of the Fore Sudetic Monocline (western Poland)
Abstract:The mafic rocks from boreholes studied here contain the assemblage typical for upper-subgreenschist to lower-greenschist facies (albite, chlorite, illite, titanite, quartz, Ti-oxide ± actinolite) as well as relict clinopyroxene. Metapelites underlying a metabasic rock sequence also record metamorphic alteration as demonstrated by the chlorite and illite crystallinities. Chlorite crystallinity suggests formation in conditions close to the subgreenschist/greenschist facies boundary, but this mineral is partly decomposed during metamorphic retrogression.
Document Type: Research Article
Publication date: December 1, 2008