New data on the origin of the Fe-Cu-As skarn deposit at Obří důl, West Sudetes, Bohemian Massif

0482287 - GLÚ 2018 RIV CA eng C - Konferenční příspěvek (zahraniční konf.)
Pašava, J. - Veselovský, F. - Dobeš, P. - Erban, V. - Pour, O. - Žák, Karel - Ackerman, Lukáš - Haluzová, Eva - Creaser, R. - Tásler, R.
New data on the origin of the Fe-Cu-As skarn deposit at Obří důl, West Sudetes, Bohemian Massif.
Mineral Resources to Discover : proceedings. Québec: Society for Geology Applied to Mineral Deposits, 2017, s. 1571-1574. ISBN 978-2-9816898-0-1.
[SGA Biennial Meeting /14./. Québec (CA), 20.08.2017-23.08.2017]
Grant CEP: GA ČR GA13-15390S
Institucionální podpora: RVO:67985831
Klíčová slova: Obří důl * Bohemian Massif * West Sudetes
Obor OECD: Geology

The Obří důl Fe-Cu-As sulfide deposit is hosted in metamorphosed lenses of marble, calc-silicate rocks and skarns. The deposit is located up to a few hundred meters away from the contact of the large, late-orogenic Variscan Krkonoše-Jizera Plutonic Complex (KJPC). Mineralogical and fluid inclusion studies of the Gustavská ore lens show that the main sulfide stage, dominated by pyrrhotite, chalcopyrite and arsenopyrite, originated from water-rich hydrothermal fluids with salinities up to 8 wt.% NaCl eq. at temperatures ranging from 324 to 358°C.These fluids replaced mainly the carbonate-rich lithologies. The 34S values indicate a magmatic source of sulfur and Re/Os dating of molybdenite are consistent with simultaneous formation of the main sulfide stage ore and the KJPC.
Trvalý link: http://hdl.handle.net/11104/0277698