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Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones
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1996
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EngineeringMechanical EngineeringPetrologyEarth ScienceRegional GeologyGeotechnical EngineeringCrustal DeformationFluid DistributionRheologyRegional TectonicsNeotectonicsShear ZoneGeologyDeformation-enhanced Fluid DistributionRock PropertiesTectonicsStructural GeologyGeotechnical PropertyCivil EngineeringGeomechanicsFluid-solid InteractionFeldspar AggregatesDuctile Shear Zones
Research Article| January 01, 1996 Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones J. Tullis; J. Tullis 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar R. Yund; R. Yund 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar J. Farver J. Farver 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Search for other works by this author on: GSW Google Scholar Author and Article Information J. Tullis 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 R. Yund 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 J. Farver 1Department of Geological Sciences, Brown University, Providence, Rhode Island 02912 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1996) 24 (1): 63–66. https://doi.org/10.1130/0091-7613(1996)024<0063:DEFDIF>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 Email Permissions Search Site Citation J. Tullis, R. Yund, J. Farver; Deformation-enhanced fluid distribution in feldspar aggregates and implications for ductile shear zones. Geology 1996;; 24 (1): 63–66. doi: https://doi.org/10.1130/0091-7613(1996)024<0063:DEFDIF>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 Experiments at 900 °C and 1.4 GPa show that the distribution of aqueous fluid in fine-grained feldspar aggregates changes from isolated pores under hydrostatic conditions to mostly wetted grain boundaries during deformation; the isolated pore distribution is rapidly regained during annealing following deformation. The deformation-enhanced fluid distribution causes a switch from dislocation creep to diffusion creep accompanied by a significant decrease in strength; it also increases the bulk transport rate through the aggregate by more than an order of magnitude. A change in fluid distribution is not observed in fine-grained quartz aggregates deformed at similar conditions. If deformation-enhanced fluid distribution occurs in naturally deformed feldspathic rocks, it could help to explain the localization of strain and enhancement of bulk transport in ductile shear zones. 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.