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dc.contributor.authorCarter, Matthew J.
dc.contributor.authorZimmerman, Mark E.
dc.contributor.authorTeyssier, Christian
dc.date.accessioned2019-11-04T16:21:17Z
dc.date.available2019-11-04T16:21:17Z
dc.date.issued2019-07-26
dc.identifier.citationCarter, M. J., Zimmerman, M. E., & Teyssier, C. (2019). An experimental investigation on fluid transfer mechanisms in ultramafic rocks. Journal of Structural Geology, 127, 103871. doi:10.1016/j.jsg.2019.103871en_US
dc.identifier.issn0191-8141
dc.identifier.issn1873-1201
dc.identifier.urihttps://dspace.allegheny.edu/handle/10456/49443
dc.description.abstractStatic annealing and crack-cook experiments were performed on wet and dry fabricated San Carlos olivine aggregates and a core of Balsam Gap dunite to investigate fluid infiltration mechanisms for low-permeability mantle rocks. Deionized water (30–40 μL) was added to cold-pressed olivine powders before hot-pressing to make wet samples; samples hot-pressed without added water are dry (<30 H/106 Si). Talc was added to all samples to provide fluid during the experiments. All samples were annealed at 1200 °C and 300 MPa confining pressure for 3 h, but crack-cook experiments were subjected to a 300–500 MPa axial differential stress at 600 °C and 125 MPa confining pressure before annealing. All samples contain abundant fluid inclusions (FIs) after annealing. Olivine aggregate samples show FI-rich and FI-depleted regions. Grain size was reduced in all samples, particularly in FI-rich regions. Crosscutting FIs associated with fractures are only widespread in the dunite. Fluids were primarily transferred from talc along grain boundaries in olivine aggregate samples and along fractures in dunite. FIs inhibit grain growth and grain-boundary migration, leading to smaller than expected grain sizes at the experimental conditions. Results have important implications where excess fluid may affect grain-size sensitive deformation mechanisms in the upper oceanic lithosphere.en_US
dc.description.sponsorshipSupport from the National Science Foundation grant EAR-1347309 is gratefully acknowledged.en_US
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Structural Geologyen_US
dc.relation.isversionofhttps://www.sciencedirect.com/science/article/pii/S0191814119301567en_US
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.en_US
dc.subjectFluid inclusionsen_US
dc.subjectZener pinningen_US
dc.subjectGrain-boundary migrationen_US
dc.subjectShear zonesen_US
dc.subjectDeformation mechanismsen_US
dc.titleAn experimental investigation on fluid transfer mechanisms in ultramafic rocksen_US
dc.description.versionFinal manuscript post peer review, without publisher's formatting or copy editing (postprint)en_US
dc.contributor.departmentGeologyen_US
dc.description.embargoThis version of the article is available for viewing to the public after July 26, 2021.en_US
dc.citation.volume127en_US
dc.identifier.doi10.1016/j.jsg.2019.103871
dc.contributor.avlauthorCarter, Matthew J.


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