The nodules of calc-silicate rocks from Polička crystalline unit and their lithologic significanceArticle PDF
The nodules of calc-silicate rocks from Polička crystalline unit and their lithologic significance
The nodules of calc-silicate rocks from several localities in the Polička crystalline complex were studied using various mineralogical and petrological methods. Nodules are enclosed in the biotite to muscovite-biotite gneises and located in 2 km thick zones situated concordantly with the main foliation of the Polička crystalline complex from NW to SE. These rocks are a product of the metamorphism predominantly calcareous concretions under amphibolite facies conditions and mineral assemblage indicated very low XCO2.
David Buriánek, Czech Geological Survey, Leitnerova 22, 658 59, Brno, Czech Republic, email@example.com