The Niederschlag fluorite-(barite) deposit, Erzgebirge/Germany—a fluid inclusion and trace element study

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Titel: The Niederschlag fluorite-(barite) deposit, Erzgebirge/Germany—a fluid inclusion and trace element study

Beteiligte: Haschke, Sebastian [Verfasser:in]; Gutzmer, Jens [Verfasser:in]; Wohlgemuth-Ueberwasser, Cora C. [Verfasser:in]; Kraemer, Dennis [Verfasser:in]; Burisch, Mathias [Verfasser:in]; Institut für Mineralogie, Technische Universität Bergakademie Freiberg, Freiberg, Germany [Verfasser:in]; Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz Institut Freiberg für Ressourcentechnologie, Freiberg, Germany [Verfasser:in]; German Research Centre for Geosciences, GFZ, Potsdam, Germany [Verfasser:in]; Department of Physics and Earth Sciences, Jacobs University Bremen, Bremen, Germany [Verfasser:in]

Erschienen: Springer Berlin Heidelberg, 2021-01-05

Sprache: Englisch

DOI: https://doi.org/10.1007/s00126-020-01035-y

Schlagwörter: Fluid inclusions ; Geochemistry ; Rare earth elements ; Industrial minerals ; Metallogenesis ; Fluorite ; Microthermometry

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Beschreibung: The Niederschlag fluorite-barite vein deposit in the Western Erzgebirge, Germany, has been actively mined since 2013. We present the results of a first comprehensive study of the mineralogy, petrography, fluid inclusions, and trace element geochemistry of fluorite related to the Niederschlag deposit. Two different stages of fluorite mineralization are recognized. Stage I fluorite is older, fine-grained, associated with quartz, and forms complex breccia and replacement textures. Conversely, the younger Stage II fluorite is accompanied by barite and often occurs as banded and coarse crystalline open-space infill. Fluid inclusion and REY systematics are distinctly different for these two fluorite stages. Fluid inclusions in fluorite I reveal the presence of a low to medium saline (7–20% eq. w (NaCl+CaCl2)) fluid with homogenization temperatures of 140–180 °C, whereas fluorite II inclusions yield distinctly lower (80–120 °C) homogenization temperatures with at least two high salinity fluids involved (18–27% eq. w (NaCl+CaCl2)). In the absence of geochronological data, the genesis of the earlier generation of fluorite-quartz mineralization remains enigmatic but is tentatively related to Permian magmatism in the Erzgebirge. The younger fluorite-barite mineralization, on the other hand, has similarities to many fluorite-barite-Pb-Zn-Cu vein deposits in Europe that are widely accepted to be related to the Mesozoic opening of the northern Atlantic Ocean. ; European Social Fund http://dx.doi.org/10.13039/501100004895

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