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New data on the origin of the Fe-Cu-As skarn deposit at Obří důl, West Sudetes, Bohemian Massif
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SYSNO ASEP 0482287 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title New data on the origin of the Fe-Cu-As skarn deposit at Obří důl, West Sudetes, Bohemian Massif Author(s) Pašava, J. (CZ)
Veselovský, F. (CZ)
Dobeš, P. (CZ)
Erban, V. (CZ)
Pour, O. (CZ)
Žák, Karel (GLU-S) SAI, RID, ORCID
Ackerman, Lukáš (GLU-S) RID, SAI, ORCID
Haluzová, Eva (GLU-S) RID, SAI
Creaser, R. (CA)
Tásler, R. (CZ)Source Title Mineral Resources to Discover : proceedings. - Québec : Society for Geology Applied to Mineral Deposits, 2017 - ISBN 978-2-9816898-0-1 Pages s. 1571-1574 Number of pages 4 s. Publication form Print - P Action SGA Biennial Meeting /14./ Event date 20.08.2017 - 23.08.2017 VEvent location Québec Country CA - Canada Event type WRD Language eng - English Country CA - Canada Keywords Obří důl ; Bohemian Massif ; West Sudetes Subject RIV DB - Geology ; Mineralogy OECD category Geology R&D Projects GA13-15390S GA ČR - Czech Science Foundation (CSF) Institutional support GLU-S - RVO:67985831 Annotation 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. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2018
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