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dc.date.accessioned2017-09-05T12:29:05Z
dc.date.available2017-09-05T12:29:05Z
dc.date.created2015-06-10T09:42:36Z
dc.date.issued2015
dc.identifier.citationRøyne, Anja Dalby, Kim N. Hassenkam, Tue . Repulsive hydration forces between calcite surfaces and their effect on the brittle strength of calcite-bearing rocks. Geophysical Research Letters. 2015, 42(12), 4786-4794
dc.identifier.urihttp://hdl.handle.net/10852/57823
dc.description.abstractThe long-term mechanical strength of calcite-bearing rocks is highly dependent on the presence and nature of pore fluids, and it has been suggested that the observed effects are due to changes in nanometer-scale surface forces near fracture tips and grain contacts. In this letter, we present measurements of forces between two calcite surfaces in air and water-glycol mixtures using the atomic force microscope. We show a time- and load-dependent adhesion at low water concentrations and a strong repulsion in the presence of water, which is most likely due to hydration of the strongly hydrophilic calcite surfaces. We argue that this hydration repulsion can explain the commonly observed water-induced decrease in strength in calcitic rocks and single calcite crystals. Furthermore, this relatively simple experimental setup may serve as a useful tool for analyzing surface forces in other mineral-fluid combinations. This research has been published in Geophysical Research Letters. © 2015 American Geophysical Unionen_US
dc.languageEN
dc.publisherAmerican Geophysical Union
dc.titleRepulsive hydration forces between calcite surfaces and their effect on the brittle strength of calcite-bearing rocksen_US
dc.typeJournal articleen_US
dc.creator.authorRøyne, Anja
dc.creator.authorDalby, Kim N.
dc.creator.authorHassenkam, Tue
cristin.unitcode185,15,4,10
cristin.unitnameKondenserte fasers fysikk
cristin.ispublishedtrue
cristin.fulltextPublishedVersion
cristin.qualitycode1
dc.identifier.cristin1247272
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical Research Letters&rft.volume=42&rft.spage=4786&rft.date=2015
dc.identifier.jtitleGeophysical Research Letters
dc.identifier.volume42
dc.identifier.issue12
dc.identifier.startpage4786
dc.identifier.endpage4794
dc.identifier.doihttp://dx.doi.org/10.1002/2015GL064365
dc.identifier.urnURN:NBN:no-60554
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0094-8276
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/57823/4/R-yne_et_al-2015-Geophysical_Research_Letters.pdf
dc.type.versionPublishedVersion


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