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GEOREF RECORD

Anticrack model for pressure solution surfaces

Raymond C. Fletcher and David D. Pollard
Anticrack model for pressure solution surfaces
Geology (Boulder) (September 1981) 9 (9): 419-424

Abstract

It is proposed that discrete solution surfaces originate at stress concentrations and propagate through rocks as anticracks. As material is dissolved and removed, the anticrack walls move toward each other; stress and displacement fields are identical with those for the conventional opening crack, but with a change in sign. Observations of entire traces of solution surfaces are consistent with the anticrack concept: 1) the surfaces are bounded in extent; 2) the dissolved thickness varies from the centre to zero at the tips; and 3) the maximum dissolved thickness is proportional to the length of the surfaces. Local dissolution and in-plane propagation are suggested by the large isotropic compressive stress at the anticrack tip. Intersecting arrays of cracks, anticracks, and shear cracks operate to yield a mode of bulk deformation similar to diffusion-accommodated grain boundary sliding in polycrystalline solids.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 9
Serial Issue: 9
Title: Anticrack model for pressure solution surfaces
Affiliation: U. S. Geol. Surv., Menlo Park, CA, United States
Pages: 419-424
Published: 198109
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 22
Accession Number: 1981-066197
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Update Code: 1981
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