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| Main Authors: | , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2001
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.787094 |
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| _version_ | 1867168561366040576 |
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| author | Stover, S Cheree Screaton, Elizabeth J Likos, William J Ge, Shemin |
| author_facet | Stover, S Cheree Screaton, Elizabeth J Likos, William J Ge, Shemin |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Vertical permeability testing was conducted on four samples collected from Site 1109, a borehole advanced during Ocean Drilling Program Leg 180. Closed conditions were applied during each test, and the samples were measured using a constant flow approach and permeant solutions that matched the geochemistry of nearby interstitial waters. Vertical permeabilities measured at 34.5 kPa effective stress generally decreased with depth and ranged from 10**-14 m**2 at 212.53 meters below seafloor (mbsf) to 10**-18 m**2 at 698.10 mbsf. The three deepest samples differed in permeability by less than one order of magnitude. Reconsolidation testing on the shallowest sample yielded a minimum permeability of 1.56 x 10**-16 m**2 at 276 kPa effective stress. Subsequent rebound testing yielded a hysteresis-type curve, with the final permeability measuring lower than the initial permeability by nearly 1.5 orders of magnitude. Dilution experiments indicated that use of a permeant solution matching the geochemistry of the interstitial waters may be necessary for accuracy in measurements and mitigation of clay swellage and collapse during testing, but further research is mandated. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_787094 |
| institution | PANGAEA |
| language | en |
| publishDate | 2001 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Lithologic description and vertical permeability measurements of ODP Site 180-1109 Stover, S Cheree Screaton, Elizabeth J Likos, William J Ge, Shemin Ocean Drilling Program; ODP Vertical permeability testing was conducted on four samples collected from Site 1109, a borehole advanced during Ocean Drilling Program Leg 180. Closed conditions were applied during each test, and the samples were measured using a constant flow approach and permeant solutions that matched the geochemistry of nearby interstitial waters. Vertical permeabilities measured at 34.5 kPa effective stress generally decreased with depth and ranged from 10**-14 m**2 at 212.53 meters below seafloor (mbsf) to 10**-18 m**2 at 698.10 mbsf. The three deepest samples differed in permeability by less than one order of magnitude. Reconsolidation testing on the shallowest sample yielded a minimum permeability of 1.56 x 10**-16 m**2 at 276 kPa effective stress. Subsequent rebound testing yielded a hysteresis-type curve, with the final permeability measuring lower than the initial permeability by nearly 1.5 orders of magnitude. Dilution experiments indicated that use of a permeant solution matching the geochemistry of the interstitial waters may be necessary for accuracy in measurements and mitigation of clay swellage and collapse during testing, but further research is mandated. |
| title | Lithologic description and vertical permeability measurements of ODP Site 180-1109 |
| topic | Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.787094 |