Letter. High-pressure aragonite phenocrysts in carbonatite and carbonated syenite xenoliths within an alkali basalt

Letter. High-pressure aragonite phenocrysts in carbonatite and carbonated syenite xenoliths... American Mineralogist, Volume 98, pages 1074–1077, 2013 Letter High-pressure aragonite phenocrysts in carbonatite and carbonated syenite xenoliths within an alkali basalt 1, 2 3 3 VtisL ra a V Hurai , * Monika HuraioVá , r astisLa V MiLoVský , JarMiLa LuptákoVá , and Patrik konečný Geological Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia Department of Mineralogy and Petrology, Comenius University, Mlynská dolina, 842 15 Bratislava, Slovakia Geological Institute, Slovak Academy of Sciences, Ďumbierska 1, 974 01 Banská Bystrica, Slovakia State Geological Institute of D. Štúr, Mlynská dolina 1, 817 04 Bratislava, Slovakia a bstract We describe the first observation of primary magmatic aragonite in carbonatite and carbonated syenite, occurring as xenoliths in a Pliocene basaltic diatreme located near the Hungary–Slovakia border. The aragonite-hosting matrix consists of disordered P-rich calcite, occasionally associated with trachyte glass. We interpret the aragonite growth as evidence of supra-lithostatic overpressure in the magmatic plumbing system that connected the crustal basaltic reservoir with the partial melting zone of the lithospheric mantle, and the disordered calcite ± trachyte as quenched residual, immiscible melts, generated close to the solidus of the carbonated alkali basalt differentiated in the crustal reservoir. The quenching event http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Mineralogist de Gruyter

Letter. High-pressure aragonite phenocrysts in carbonatite and carbonated syenite xenoliths within an alkali basalt

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Publisher
de Gruyter
Copyright
Copyright © 2011–2019 by Walter de Gruyter GmbH
ISSN
0003-004X
DOI
10.2138/am.2013.4410
Publisher site
See Article on Publisher Site

Abstract

American Mineralogist, Volume 98, pages 1074–1077, 2013 Letter High-pressure aragonite phenocrysts in carbonatite and carbonated syenite xenoliths within an alkali basalt 1, 2 3 3 VtisL ra a V Hurai , * Monika HuraioVá , r astisLa V MiLoVský , JarMiLa LuptákoVá , and Patrik konečný Geological Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia Department of Mineralogy and Petrology, Comenius University, Mlynská dolina, 842 15 Bratislava, Slovakia Geological Institute, Slovak Academy of Sciences, Ďumbierska 1, 974 01 Banská Bystrica, Slovakia State Geological Institute of D. Štúr, Mlynská dolina 1, 817 04 Bratislava, Slovakia a bstract We describe the first observation of primary magmatic aragonite in carbonatite and carbonated syenite, occurring as xenoliths in a Pliocene basaltic diatreme located near the Hungary–Slovakia border. The aragonite-hosting matrix consists of disordered P-rich calcite, occasionally associated with trachyte glass. We interpret the aragonite growth as evidence of supra-lithostatic overpressure in the magmatic plumbing system that connected the crustal basaltic reservoir with the partial melting zone of the lithospheric mantle, and the disordered calcite ± trachyte as quenched residual, immiscible melts, generated close to the solidus of the carbonated alkali basalt differentiated in the crustal reservoir. The quenching event

Journal

American Mineralogistde Gruyter

Published: May 1, 2013

Keywords: Aragonite

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