Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/181648
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Aguilar Gil, Carmen María | - |
dc.contributor.author | Stípská, Pavla | - |
dc.contributor.author | Chopin, Francis | - |
dc.contributor.author | Schulmann, Karel | - |
dc.contributor.author | Pitra, Pavel | - |
dc.contributor.author | Závada, Prokop | - |
dc.contributor.author | Hasalová Pavlína | - |
dc.contributor.author | Martelat, Jean-Emmanuel | - |
dc.date.accessioned | 2021-12-03T12:05:13Z | - |
dc.date.available | 2021-12-03T12:05:13Z | - |
dc.date.issued | 2020-02-15 | - |
dc.identifier.issn | 1437-3254 | - |
dc.identifier.uri | http://hdl.handle.net/2445/181648 | - |
dc.description.abstract | High-pressure granitic orthogneiss of the south-eastern Orlica-Śnieżnik Dome (NE Bohemian Massif) shows relics of a shallow-dipping foliation, reworked by upright folds and a mostly pervasive N-S trending subvertical axial planar foliation. Based on macroscopic observations, a gradual transition from banded to schlieren and nebulitic orthogneiss was distinguished. All rock types comprise plagioclase, K-feldspar, quartz, white mica, biotite and garnet. The transition is characterized by increasing presence of interstitial phases along like-like grain boundaries and by progressive replacement of recrystallized K-feldspar grains by fine-grained myrmekite. These textural changes are characteristic for syn-deformational grain-scale melt percolation, which is in line with the observed enrichment of the rocks in incompatible elements such as REEs, Ba, Sr and K suggesting open-system behaviour with melt passing through the rocks. The P-T path deduced from the thermodynamic modelling indicates decompression from ~ 15−16 kbar and ~ 650-740 oC to ~ 6 kbar and ~ 640 oC. Melt was already present at the P-T peak conditions as indicated by the albitic composition of plagioclase in films, interstitial grains and in myrmekite. The variably re-equilibrated garnet suggests that melt content may have varied along the decompression path, involving successively both melt gain and loss. The ~ 6-8 km wide zone of vertical foliation and migmatite textural gradients is interpreted as vertical crustal-scale channel where the grain-scale melt percolation was associated with horizontal shortening and vertical flow of partially molten crustal wedge en masse. | - |
dc.format.extent | 79 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Verlag | - |
dc.relation.isformatof | Versió postprint del document publicat a: https://doi.org/10.1007/s00531-020-01838-4 | - |
dc.relation.ispartof | International Journal of Earth Sciences, 2020, vol. 109, num. 4, p. 1213-1246 | - |
dc.relation.uri | https://doi.org/10.1007/s00531-020-01838-4 | - |
dc.rights | (c) Springer Verlag, 2020 | - |
dc.source | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) | - |
dc.subject.classification | Petrologia | - |
dc.subject.classification | Geologia estructural | - |
dc.subject.classification | Granit | - |
dc.subject.other | Petrology | - |
dc.subject.other | Structural geology | - |
dc.subject.other | Granite | - |
dc.title | Syn-Deformational Melt percolation through a high-pressure orthogneiss and the exhumation of a subducted continental wedge (Orlica-Śnieżnik Dome, NE Bohemian Massif) | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 709634 | - |
dc.date.updated | 2021-12-03T12:05:14Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
709634.pdf | 5.35 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.