Permeability and consolidation properties of subducting sediments off Costa Rica, ODP Leg 205

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doi: 10.2973/odp.proc.sr.205.203.2006
Author(s): McKiernan, Alexander W.; Saffer, Demian M.
Ocean Drilling Program, Leg 205, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United States
Other:
Universität Bremen, Federal Republic of Germany
Texas A&M University, United States
Southampton Oceanography Centre, United Kingdom
Woods Hole Oceanographic Institution, United States
Dalhousie University, Canada
Japan Agency for Marine-Earth Science and Technology, Japan
University of California San Diego, United States
University of Wyoming, United States
University of Florida, United States
Eidgenössische Technische Hochschule-Zentrum, Switzerland
Universita degli Studi di Modena, Italy
Volume Title: Proceedings of the Ocean Drilling Program; scientific results; fluid flow and subduction fluxes across the Costa Rica convergent margin; implications for the seismogenic zone and subduction factory; covering Leg 205 of the cruises of the Drilling Vessel JOIDES Resolution; Victoria, Canada, to Balboa, Panama; Sites 1253-1255; 2 September-6 November 2002
Volume Author(s): Morris, Julie D.; Villinger, Heinrich W.; Klaus, Adam; Cardace, Dawn M.; Chavagnac, Valerie M. C.; Clift, Peter D.; Haeckel, Matthias; Hisamitsu, Toshio; Kastner, Miriam; Pfender, Marion; Saffer, Demian M.; Santelli, Cara; Schramm, Burkhard; Screaton, Elizabeth J.; Solomon, Evan A.; Strasser, Michael; Moe, Kyaw Thu; Vannucchi, Paola
Source: Proceedings of the Ocean Drilling Program; scientific results; fluid flow and subduction fluxes across the Costa Rica convergent margin; implications for the seismogenic zone and subduction factory; covering Leg 205 of the cruises of the Drilling Vessel JOIDES Resolution; Victoria, Canada, to Balboa, Panama; Sites 1253-1255; 2 September-6 November 2002, Julie D. Morris, Heinrich W. Villinger, Adam Klaus, Dawn M. Cardace, Valerie M. C. Chavagnac, Peter D. Clift, Matthias Haeckel, Toshio Hisamitsu, Miriam Kastner, Marion Pfender, Demian M. Saffer, Cara Santelli, Burkhard Schramm, Elizabeth J. Screaton, Evan A. Solomon, Michael Strasser, Kyaw Thu Moe and Paola Vannucchi; Ocean Drilling Program, Leg 205, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.205, 24p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML. 5 refs.CD-ROM, ISSN 1096-2514; WWW, ISSN 1096-7451; illus., incl. sect., 6 tables, sketch map
Summary: Vertical permeability and sediment consolidation measurements were taken on seven whole-round drill cores from Sites 1253 (three samples), 1254 (one sample), and 1255 (three samples) drilled during Ocean Drilling Program Leg 205 in the Middle America Trench off of Costa Rica's Pacific Coast. Consolidation behavior including slopes of elastic rebound and virgin compression curves (Cc) was measured by constant rate of strain tests. Permeabilities were determined from flowthrough experiments during stepped-load tests and by using coefficient of consolidation (Cv) values continuously while loading. Consolidation curves and the Casagrande method were used to determine maximum preconsolidation stress. Elastic slopes of consolidation curves ranged from 0.097 to 0.158 in pelagic sediments and 0.0075 to 0.018 in hemipelagic sediments. Cc values ranged from 1.225 to 1.427 for pelagic carbonates and 0.504 to 0.826 for hemipelagic clay-rich sediments. In samples consolidated to an axial stress of ∼20 MPa, permeabilities determined by flow-through experiments ranged from a low value of 7.66 × 10-20 m2 in hemipelagic sediments to a maximum value of 1.03 × 10-16 m2 in pelagic sediments. Permeabilities calculated from Cv values in the hemipelagic sediments ranged from 4.81 × 10-16 to 7.66 × 10-20 m2 for porosities 49.9%-26.1%.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 30 Engineering Geology; Central America; Compression; Consolidation; Costa Rica; East Pacific; Engineering properties; Experimental studies; Laboratory studies; Leg 205; Marine sediments; Mechanical properties; Middle America Trench; North Pacific; Northeast Pacific; Ocean Drilling Program; Pacific Ocean; Permeability; Physical properties; Pressure; Sediments; Soil mechanics; Strain; Stress; Subduction zones; Uniaxial tests
Coordinates: N093800 N094000 W0861000 W0861200
Record ID: 2007025139
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