ROLE OF AQUEOUS FLUIDS IN THE INTERNAL FRICTION OF ROCK.

J. R. Bulau, B. R. Tittmann, M. Abdel-Gawad, C. Salvado

Research output: Contribution to journalConference articlepeer-review

17 Scopus citations

Abstract

The effects of water on elastic energy dissipation in rock under upper crustal conditions are considered briefly in this paper. Experimental evidence indicates that in dry rock the energy dissipation process involves water adsorbed on the surfaces of very thin cracks. In one mechanism the adsorbed water is regarded as a viscoelastic film. Portions of this layer are forced to relax as crack thickness changes with the passing elastic wave. A second possible mechanism involves the relaxation of electrostatic repulsion stresses between oriented polar water molecules on opposing crack faces. When water is present as a bulk fluid, attenuation can be explained by the flow of a viscous fluid into and out of very thin cracks in response to dynamic stresses associated with a passing elastic wave.

Original languageEnglish (US)
Pages (from-to)4207-4212
Number of pages6
JournalJournal of Geophysical Research
Volume89
Issue numberB6
StatePublished - Jun 10 1984
EventChem Eff on Water on the Deform and Strengths of Rocks -
Duration: Jun 6 1982Jun 10 1982

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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