Počet záznamů: 1

Two Contrasting Fabric Patterns of Olivine Observed in Garnet and Spinel Peridotite from a Mantle-derived Ultramafic Mass Enclosed in Felsic Granulite, the Moldanubian Zone, Czech Republic

  1. 1.
    0337938 - GLU-S 2010 RIV GB eng J - Článek v odborném periodiku
    Kamei, A. - Obata, M. - Michibayashi, K. - Hirajima, T. - Svojtka, Martin
    Two Contrasting Fabric Patterns of Olivine Observed in Garnet and Spinel Peridotite from a Mantle-derived Ultramafic Mass Enclosed in Felsic Granulite, the Moldanubian Zone, Czech Republic.
    Journal of Petrology. Roč. 51, 1/2 (2010), s. 101-123 ISSN 0022-3530
    Výzkumný záměr: CEZ:AV0Z30130516
    Klíčová slova: garnet peridotite * spinel peridotite * olivine fabrics * Bohemian Massif
    Kód oboru RIV: DB - Geologie a mineralogie
    Impakt faktor: 3.842, rok: 2010

    The Mohelno peridotite is a medium-sized ultramafic body (2 km x 4 km in size) enclosed in the Gfoehl granulites in the eastern part of the Bohemian Massif. To decipher the origin and history of this mantle-derived peridotite, we determined the mineral chemistry by electron microprobe analysis and olivine fabric patterns by the electron backscattered diffraction method for each rock type.We found two distinct types of olivine fabric (crystal-preferred orientation; CPO) in the peridotite, which can be correlated with the mineralogy and thermal history of each. Starting from a high-temperature (>1200 oC) spinel peridotite, during exhumation and cooling in contact with surrounding granulites, the marginal part of the body was transformed to garnet peridotite, whereas the interior remained in the spinel-peridotite facies because cooling was slower inside the body.
    Trvalý link: http://hdl.handle.net/11104/0181823