Steinbruch Wanko/NÖ: Optimierung der Rohstoffgewinnung auf der Basis von geowissenschaftlichen Untersuchungen: eine multi-disziplinäre Studie

Translated title of the contribution: Quarry Wanko/NÖ: optimisation of the raw material production on basis of geoscientific investigations: a multi-disciplinary study

Birgit Kain - Bückner

Research output: ThesisMaster's Thesis

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Abstract

The subject of the present MSc thesis is the granulite quarry Wanko, Niederösterreich. The study was carried out in cooperation with the ASAMER Kies- und Betonwerke GmbH. The task of the present study was a comparison between the mineralogical, petrological and geochemical characteristics of the occurring granulite types with the mechanical properties (LA, PSV), which represent the most important criterias for the industrial use of these rocks. The Wanko quarry is located within the Granulite- Complex of the Dunkelsteiner Wald as part of the Moldanubian Zone of the Bohemian Massiv of Niederösterreich. Three types of granulites could be distinguished on the basis of colour and the mineralogical composition: a) Violet Type, b) Light Type and c) Dark Type. The major mineralogical differences are defined by the contents of biotite, orthopyroxene and garnet. The pyroxene- rich granulite (Dark Type) is characterized by a higher content of garnet and ore minerals and less biotite, if compared with the felsic types of granulite (Violet Type and Light Type). A geochemical classification and discrimination was carried out on the basis of major, trace and rare earth element concentrations. It is shown that all granulites of the Wanko quarry are part of a co-genetic rock sequence. The protolith of the granulites was, most likely, a granite that derived from a S-type magma. Furthermore, it could be shown, that the granulites were formed at a destructive plate margin. The P-T- conditions of metamorphism could be estimated at 13,7+/-2,3kbar and 950+/-55°C using garnet- biotite- orthopyroxene geothermobarometry. Comparing the mineralogical and petrological characteristics with the mechanical properties (LA, PSV) showed that all granulites correspond to the highest quality class G1 in respect to the LA. However, regarding PSV the pyroxene rich granulite belongs to the highest quality class G1, whereas the felsic granulite types belong to the lower quality class G2. The higher biotite content represents the reason for the lower quality of the mechanical properties of the felsic granulite types (i.e. PSV). The strict schistosity parallel orientation of the biotite causes higher rock anisotropy of the felsic granulite types (Violett Type and Light Type), resulting in less reproducible homogenous properties during material testing (i.e. PSV).
Translated title of the contributionQuarry Wanko/NÖ: optimisation of the raw material production on basis of geoscientific investigations: a multi-disciplinary study
Original languageGerman
QualificationDipl.-Ing.
Supervisors/Advisors
  • Thalhammer, Oskar, Supervisor (internal)
  • Stadlober, Kurt, Co-Supervisor (external), External person
Award date25 Jun 2010
Publication statusPublished - 2010

Bibliographical note

embargoed until 14-05-2015

Keywords

  • granulite quarry Wanko material properties S-type granite

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