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Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
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the effect of rock particles and d2o replacement on the flow behaviour of ice

descriptionPublicationkeyboard_double_arrow_right Article , Journal 13 Feb 2017 Belgium, United Kingdom Publisher:The Royal SocietyJournal:Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, volume 375, page 20,150,349 (issn: 1364-503X, eissn: 1471-2962, Copyright policy )
Authors: Ceri A. Middleton; Peter M. Grindrod; Peter R. Sammonds;

doi: 10.1098/rsta.2015.0349

pmid: 28025298

pmc: PMC5179959

handle: 2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/247676

the effect of rock particles and d2o replacement on the flow behaviour of ice

Abstract

Ice–rock mixtures are found in a range of natural terrestrial and planetary environments. To understand how flow processes occur in these environments, laboratory-derived properties can be extrapolated to natural conditions through flow laws. Here, deformation experiments have been carried out on polycrystalline samples of pure ice, ice–rock and D 2 O-ice–rock mixtures at temperatures of 263, 253 and 233 K, confining pressure of 0 and 48 MPa, rock fraction of 0–50 vol.% and strain-rates of 5 × 10 −7 to 5 × 10 −5 s −1 . Both the presence of rock particles and replacement of H 2 O by D 2 O increase bulk strength. Calculated flow law parameters for ice and H 2 O-ice–rock are similar to literature values at equivalent conditions, except for the value of the rock fraction exponent, here found to be 1. D 2 O samples are 1.8 times stronger than H 2 O samples, probably due to the higher mass of deuterons when compared with protons. A gradual transition between dislocation creep and grain-size-sensitive deformation at the lowest strain-rates in ice and ice–rock samples is suggested. These results demonstrate that flow laws can be found to describe ice–rock behaviour, and should be used in modelling of natural processes, but that further work is required to constrain parameters and mechanisms for the observed strength enhancement. This article is part of the themed issue ‘Microdynamics of ice’.

Countries
Belgium, United Kingdom
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Keywords

550, Physique, Astronomie, Sciences de l'ingénieur, Mathématiques, es, Ice-rock flow laws, Ice-rock rheology, cps, D2O-ice-rock rheology, Triaxial deformation

  • BIP!
    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 11
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    		 Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
11
Average
Average
Top 10%
Green
bronze