| Title: |
Correlation of microseismic and chemical properties of brittle deformation in Locharbriggs sandstone
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| Resource Type: |
document --> technical publication --> journal article
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| Country: |
EU Projects
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| Year: |
2003 |
| Availability: |
Journal of Geophysical Research 108 (B5), 2268 doi:10.1029/2002JB002277.
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| Author 1/Producer: |
Ojala, IO
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| Other Authors/Producers: |
Ngwenya, BT, Main, IG & Elphick, SC
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| Author / Producer Type: |
EC Project
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| Publisher: |
American Geophysical Union
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| Publisher City: |
2000 Florida Avenue N.W. Washington, DC 20009 USA
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| ISSN: |
0148-022
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EUGRIS Keyword(s): |
Contaminated land-->Soil and groundwater processes-->Geochemistry
Soil-->Soil Overview
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| Short description: |
Time-dependent properties of materials such as rocks depend both on preexisting cracks and chemical properties acting at their tips. This paper looks at the effect of chemical processes on a crack population using triaxial flow-through compression tests on Locharbriggs sandstone. The tests were carried out at temperatures of 25–80°C and at strain rates ranging from 10−5 to 10−8 s−1 under constant stress rate loading. Damage parameters inferred from exit pore data from the acoustic emission (AE) monitoring predicted the stress-strain curves adequately, or at least up to the point of strong microcrack coalescence. Observed environmental and strain rate dependence of mechanical properties can hence be attributed uniquely to time-dependent crack growth by the stress corrosion mechanism.
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Submitted By:
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Dr Stefan Gödeke WhoDoesWhat?
Last update: 15/05/2007
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