Whole-rock geochemistry of rock units from the Pfitscher Joch area, Western Tauern Window
Cite as:
Franz, Gerhard; Berryman, Eleanor; Kutzschbach, Martin; Meixner, Anette; Kasemann, Simone; Lucassen, Friedrich; Loges, Anselm; Schultze, Dina (2021): Whole-rock geochemistry of rock units from the Pfitscher Joch area, Western Tauern Window. GFZ Data Services. https://doi.org/10.5880/fidgeo.2021.013
Status
I N R E V I E W : Franz, Gerhard; Berryman, Eleanor; Kutzschbach, Martin; Meixner, Anette; Kasemann, Simone; Lucassen, Friedrich; Loges, Anselm; Schultze, Dina (2021): Whole-rock geochemistry of rock units from the Pfitscher Joch area, Western Tauern Window. GFZ Data Services. https://doi.org/10.5880/fidgeo.2021.013
Abstract
In the Western Tauern Window, Zillertal Alps (Austria/Italy), metasediments of a Mesozoic intra-montane basin ("Pfitsch-Mörchner basin"; Veselá and Lammerer, 2008) are exposed. The (me-ta)sediments were deposited on a Variscan basement, which comprises different types of meta-granitoids and their (Pre)-Variscan metamorphic country rocks. The chemical composition (major and trace elements) of these rocks is presented for 205 samples. In the metasediments (103 samples), we distinguish the following units (from base to top): metaconglomerate (14 samples) – mica schist (19) – carbonate-mica schist (9) – tourmaline gneiss (35) – lazulite quartzite (25) – marble (1). In the basement to the NW of the basin, we distinguish two different types of orthogneiss (both Zentralgneis of the Tux unit, in the local nomenclature two varieties Augenflasergneis and Schrammacher gneiss; 32 samples) and the roof pendant of these gneisses with serpentinite (10 samples), amphibolite, and paragneiss (no analyses presented).
In the SE of the basin we distinguish orthogneiss from the Zillertal branch of the Zentralgneis (7 samples), biotite-chlorite-plagioclase gneiss (9 samples), amphibolite, and (Pre-)Variscan graphitic micaschist with the local name Furtschagl schist (no analyses presented), and at the base of the basin sediments a schistose pyrite quartzite (31) with lenses of magnetite-chloritoide-staurolite-chlorite rich rocks (13 samples MCSC-lenses, interpreted as paleosol, Barrientos and Selverstone, 1987). From a subset of these samples (23 samples), rare earth elements were determined, and from another subset of 25 samples 11B/10B boron isotope ratios and whole rock B-contents. This extends a previously published data set of B isotope ratios in tourmaline from the metasedimen-tary unit (Berryman et al. 2017). For a test of stratigraphic correlation, typical rocks from the meta-conglomerate, the carbonate-mica schist, lazulite quartzite, and marble (one sample each) were analyzed for 87Sr/86Sr isotope ratios.
Authors
Franz, Gerhard;Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Berryman, Eleanor;CammetMINING of Natural Resources Canada, Ottawa, Ontario, Canada
Kutzschbach, Martin;Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
Meixner, Anette;Faculty of Geosciences MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Kasemann, Simone;Faculty of Geosciences MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Lucassen, Friedrich;Faculty of Geosciences MARUM Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Loges, Anselm;Institut für Geologische Wissenschaften, Freie Universität Berlin, Berlin, Germany
Schultze, Dina;Institut für Geologische Wissenschaften, Freie Universität Berlin, Berlin, Germany
Contact
Franz, Gerhard; Department of Applied Geosciences, Technical University Berlin, Berlin, Germany;
CharacterString: In the Western Tauern Window, Zillertal Alps (Austria/Italy), metasediments of a Mesozoic intra-montane basin ("Pfitsch-Mörchner basin"; Veselá and Lammerer, 2008) are exposed. The (me-ta)sediments were deposited on a Variscan basement, which comprises different types of meta-granitoids and their (Pre)-Variscan metamorphic country rocks. The chemical composition (major and trace elements) of these rocks is presented for 205 samples. In the metasediments (103 samples), we distinguish the following units (from base to top): metaconglomerate (14 samples) – mica schist (19) – carbonate-mica schist (9) – tourmaline gneiss (35) – lazulite quartzite (25) – marble (1). In the basement to the NW of the basin, we distinguish two different types of orthogneiss (both Zentralgneis of the Tux unit, in the local nomenclature two varieties Augenflasergneis and Schrammacher gneiss; 32 samples) and the roof pendant of these gneisses with serpentinite (10 samples), amphibolite, and paragneiss (no analyses presented).
In the SE of the basin we distinguish orthogneiss from the Zillertal branch of the Zentralgneis (7 samples), biotite-chlorite-plagioclase gneiss (9 samples), amphibolite, and (Pre-)Variscan graphitic micaschist with the local name Furtschagl schist (no analyses presented), and at the base of the basin sediments a schistose pyrite quartzite (31) with lenses of magnetite-chloritoide-staurolite-chlorite rich rocks (13 samples MCSC-lenses, interpreted as paleosol, Barrientos and Selverstone, 1987). From a subset of these samples (23 samples), rare earth elements were determined, and from another subset of 25 samples 11B/10B boron isotope ratios and whole rock B-contents. This extends a previously published data set of B isotope ratios in tourmaline from the metasedimen-tary unit (Berryman et al. 2017). For a test of stratigraphic correlation, typical rocks from the meta-conglomerate, the carbonate-mica schist, lazulite quartzite, and marble (one sample each) were analyzed for 87Sr/86Sr isotope ratios.
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CharacterString: Franz, Gerhard
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CharacterString: Department of Applied Geosciences, Technical University Berlin, Berlin, Germany
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