Mineral Chemistry of Metapelites from the Modereck Nappe (central Tauern Window, Eastern Alps)

Cite as:

Groß, Philip; Handy, Mark; John, Timm; Pestal, Gerhard; Pleuger, Jan (2020): Mineral Chemistry of Metapelites from the Modereck Nappe (central Tauern Window, Eastern Alps). GFZ Data Services. https://doi.org/10.5880/fidgeo.2020.010

Status

I N R E V I E W : Groß, Philip; Handy, Mark; John, Timm; Pestal, Gerhard; Pleuger, Jan (2020): Mineral Chemistry of Metapelites from the Modereck Nappe (central Tauern Window, Eastern Alps). GFZ Data Services. https://doi.org/10.5880/fidgeo.2020.010

Abstract

In this dataset we report exemplary, representative mineral chemistry data of two metapelite samples (PG61 and PG89) from the Modereck Nappe in the central Tauern Window. The dataset is supplemental to the publication by Groß et al. (2020). For further details on the sample mineralogy and microstructure not provided in the data description file, we refer to this publication. The data was initially collected for a thermobarometry study of the region in the framework of the priority programme SPP 4DMB, funded by the German Research Association (DFG).

Sample description:
Sample PG61 is an example of a chloritoid-micaschist from the Piffkar Formation. Sample coordinates are UTM Zone 33N: 337044 E, 5216460 N (WGS84, 12.85326 E, 47.081526 N). It contains quartz, phengite, chloritoid, some chlorite, ilmenite (mix of ilmenite, geikielite, Fe-oxide) and relicts of sceletal garnet (as palisades along quartz grain boundaries) and accessory allanite. Rutile occurs as inclusions in quartz and no lawsonite, kyanite or carpholite were found.

Sample PG89 is an example of a garnet-micaschist from the Brennkogel Formation. Sample coordinates are UTM Zone 33N: 341888 E, 5207230 N. (WGS 84, 12.920259 E, 46.999701 N) It contains quartz, phengite, garnet, chlorite, albite, tourmaline and rutile (often with ilmenite margins). No lawsonite, paragonite, glaucophane or omphacite was found.

Analytical procedure:
The compositions of rock forming minerals (white mica, garnet, chloritoid and chlorite) were aquired on a JEOL JXA 8200 SuperProbe at Freie Universität Berlin, Institut für Geologische Wissenschaften. Measurement conditions for spot analyses were 15 kV acceleration voltage, 20 nA beam current and <1 μm beam diameter. We used natural and synthetic reference materials for instrument calibration.

Authors

Groß, Philip;Freie Universität Berlin, Berlin, Germany
Handy, Mark;Freie Universität Berlin, Berlin, Germany
John, Timm;Freie Universität Berlin, Berlin, Germany
Pestal, Gerhard;Geologische Bundesanstalt, Vienna, Austria
Pleuger, Jan;Freie Universität Berlin, Berlin, Germany

Contact

Groß, Philip; Freie Universität Berlin;

Keywords

exhumation, high-pressure metamorphism, Alps, channel extrusion, orogenic wedge, sheath fold, 4DMB, 4D Mountain Building, geodynamics, geology, tectonics