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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
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SYSNO ASEP 0337938 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 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 Tvůrce(i) Kamei, A. (JP)
Obata, M. (JP)
Michibayashi, K. (JP)
Hirajima, T. (JP)
Svojtka, Martin (GLU-S) SAI, RID, ORCIDZdroj.dok. Journal of Petrology. - : Oxford University Press - ISSN 0022-3530
Roč. 51, 1/2 (2010), s. 101-123Poč.str. 23 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova garnet peridotite ; spinel peridotite ; olivine fabrics ; Bohemian Massif Vědní obor RIV DB - Geologie a mineralogie CEZ AV0Z30130516 - GLU-S (2005-2011) UT WOS 000273893000008 EID SCOPUS 77749291852 DOI 10.1093/petrology/egp092 Anotace 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°C) 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2010
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