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Submagmatic microfractures in granites
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1992
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Christian DelasEarth ScienceEngineeringStructural GeologyMetamorphic PetrologyGeomechanicsEconomic GeologyGeologyEarth SciencesSubmagmatic MicrofracturesFrance SearchGeochronologyExperimental PetrologyPetrologyMetamorphic ProcessTectonics
Research Article| January 01, 1992 Submagmatic microfractures in granites Jean Luc Bouchez; Jean Luc Bouchez 1Laboratoire de Pétrophysique et Tectonique, Université Paul-Sabatier and Centre National de la Recherche Scientifique, Rue des 36-Ponts, 31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Christian Delas; Christian Delas 1Laboratoire de Pétrophysique et Tectonique, Université Paul-Sabatier and Centre National de la Recherche Scientifique, Rue des 36-Ponts, 31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Gérard Gleizes; Gérard Gleizes 1Laboratoire de Pétrophysique et Tectonique, Université Paul-Sabatier and Centre National de la Recherche Scientifique, Rue des 36-Ponts, 31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Anne Nédélec; Anne Nédélec 1Laboratoire de Pétrophysique et Tectonique, Université Paul-Sabatier and Centre National de la Recherche Scientifique, Rue des 36-Ponts, 31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Michel Cuney Michel Cuney 1Laboratoire de Pétrophysique et Tectonique, Université Paul-Sabatier and Centre National de la Recherche Scientifique, Rue des 36-Ponts, 31400 Toulouse, France Search for other works by this author on: GSW Google Scholar Geology (1992) 20 (1): 35–38. https://doi.org/10.1130/0091-7613(1992)020<0035:SMIG>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jean Luc Bouchez, Christian Delas, Gérard Gleizes, Anne Nédélec, Michel Cuney; Submagmatic microfractures in granites. Geology 1992;; 20 (1): 35–38. doi: https://doi.org/10.1130/0091-7613(1992)020<0035:SMIG>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Microstructures in Hercynian granite plutons of the Pyrenees indicate fracturing of plagioclase crystals in the presence of melt. This is represented mainly by quartz and/or feldspar that fills fractures. Electron-microprobe analyses demonstrate that, in compositional agreement with the rims of the zoned plagioclase, the feldspar infillings are more sodic with decreasing melt fraction. Fracturing resulted from concentration of stress at contacts between grains while the granite was submagmatic, i.e., when the melt was below the critical fraction for magmatic flow. Material compositionally far from eutectic is petrologically the best candictate to develop submagmatic fractures, because during cooling the volume fraction of melt remains low for a large temperature range. A strong tendency for microfractures to be oblique to flow foliation may constitute a new criterion for shear sense in magmas. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.