Graphite deposits of the Southern Bohemia (Moldanubian Zone, Czech Republic): their origin, metamorphic evolution and economic significance

0569111 - ÚSMH 2023 NZ eng C - Konferenční příspěvek (zahraniční konf.)
Poňavič, M. - Vymazalová, A. - Kříbek, B. - Knésl, I. - Pticen, F. - Hladíková, J. - Sýkorová, Ivana - Machovič, V. - Čížek, J.
Graphite deposits of the Southern Bohemia (Moldanubian Zone, Czech Republic): their origin, metamorphic evolution and economic significance.
The critical role of minerals in the carbon-neutral future. Proceedings of the 16th SGA Biennial Meeting, 28-31 March 2022. Vol. 1. Rotorua: Society for geology applied to mineral deposits, 2022 - (Christie, A.), s. 329-332
[SGA Biennial Meeting /16./. Rotorua (NZ), 28.03.2022-31.03.2022]
Grant CEP: GA TA ČR(CZ) SS02030023
Institucionální podpora: RVO:67985891
Klíčová slova: graphite * morphology * reflectance * Raman spectra * origin * metamorphic evolution * South Bohemia
Obor OECD: Geology

Based on the study of morphology, reflectance and micro-Raman spectroscopy of the graphite ore, three types of graphite flakes were distinguished, the shape and size of which are determined by their origin in prograde metamorphic processes, intensity of ductile and brittle deformations and retrograde recrystallization. The extreme lithological diversity of the unit, which is characterized by alternating
individual rock types in the order of cm to dm, and the presence of volcanic admixture in sediments, suggests that the deposition of organic protolite of graphite took place in a shallow water environment during synchronous volcanic activity. Abundant occurrence of Cl-scapolite in calc-silicate rocks and marbles indicate elevated salinity of the marine environment.
Trvalý link: https://hdl.handle.net/11104/0341104