McKiernan, Alexander W.; Saffer, Demian M. (2006): Permeability and consolidation properties of subducting sediments off Costa Rica, ODP Leg 205. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: 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, 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, 205, georefid:2007-025139

Abstract:
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 (C (sub c) ) was measured by constant rate of strain tests. Permeabilities were determined from flowthrough experiments during stepped-load tests and by using coefficient of consolidation (C (sub v) ) 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. C (sub c) 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 approximately 20 MPa, permeabilities determined by flow-through experiments ranged from a low value of 7.66 X 10 (super -20) m (super 2) in hemipelagic sediments to a maximum value of 1.03 X 10 (super -16) m (super 2) in pelagic sediments. Permeabilities calculated from C (sub v) values in the hemipelagic sediments ranged from 4.81 X 10-16 to 7.66 X 10-20 m2 for porosities 49.9%-26.1%.
Coverage:
West: -86.1200 East: -86.1000 North: 9.4000 South: 9.3800
Relations:
Expedition: 205
Supplemental Information:
Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.205.203.2006 (c.f. for more detailed metadata)
Data download: application/pdf
This metadata in ISO19139 XML format