Long, Hui et al. (2006): Data report; Consolidation characteristics of sediments from IODP Expedition 308, Ursa Basin, Gulf of Mexico

Leg/Site/Hole:
IODP 308
IODP 308 U1322
IODP 308 U1324
Identifier:
2008-102411
georefid

10.2204/iodp.proc.308.204.2008
doi

Creator:
Long, Hui
Pennsylvania State University, Department of Energy and Mineral Engineering, University Park, PA, United States
author

Flemings, Peter B.
Albert-Ludwigs-Universitaet Freiburg, Federal Republic of Germany
author

Germaine, J. T.
University of California-Santa Cruz, United States
author

Saffer, D. M.
Lamont-Doherty Earth Observatory, United States
author

Dugan, Brandon
Kyoto University, Japan
author

Identification:
Data report; Consolidation characteristics of sediments from IODP Expedition 308, Ursa Basin, Gulf of Mexico
2006
In: Flemings, Peter B., Behrmann, Jan H., John, Cedric M., Iturrino, Gerardo J., Aizawa, Yasutaka, Nguyen Thi Thanh Binh, De Silva, Neil, Dugan, Brandon, Edeskar, Tommy M., Franke, Christine, Gay, Aurelien, Gilhooly, William Patrick, III, Gutierrez-Pastor, Julia, Jiang Shaoyong, Li Qianyu, Long, Hui, Moore, J. Casey, Nunoura, Takuro, Pirmez, Carlos, Reichow, Marc, Sawyer, Derek E., Schneider, Julia, Shumnyk, Anatoliy V., Suzuki, Takahiro, Takano, Yoshinori, Urgeles, Roger, Yamamoto, Yuzuru, Zampetti, Valentina, Gulf of Mexico hydrogeology; Expedition 308 of the riserless drilling platform from Mobile, Alabama, to Balboa, Panama; Sites U1319-U1324; 30 May-8 July 2005
IODP Management International, Washington, DC, United States
308
We conducted constant rate of strain consolidation tests on 9 samples from Integrated Ocean Drilling Program Site U1322 and 23 samples from Site U1324 in three laboratories (Massachusetts Institute of Technology, Pennsylvania State University, and Rice University) to obtain the consolidation properties of the sediment, as well as determine the stress history of the sites. The sediments recovered from above 200 meters below seafloor (mbsf) at both sites have similar consolidation properties. The compression index (Cc) ranges from 0.1508 to 0.5052. Cc decreases with void ratio at both sites. The expansion index (Ce) ranges from 0.0153 to 0.1144 and decreases with void ratio at both sites. The in situ hydraulic conductivity (Ki) ranges from 2.18X10 (super -11) to 6.38X10 (super -10) m/s. Ki decreases with depth. The e-log(Ki) relation has different slopes for sediments above and below 300 mbsf at Site U1324. The coefficient of consolidation (cv) ranges from 1.5X10 (super -8) to 4.2X10 (super -) 7 m (super 2) /s. cv increases with depth for the sediments above 200 mbsf at both sites and shows no clear trend for the sediments below 200 mbsf at Site U1324. The preconsolidation pressure (P'c) is significantly less than the hydrostatic vertical effective stress (sigma 'vh) at both sites, which suggests that Ursa sediments are overpressured.
English
Coverage:Geographic coordinates:
North:28.0600
West:-89.0800East: -89.0100
South:28.0500

Engineering geology; Atlantic Ocean; compression; consolidation; consolidometer tests; cores; expansion; Expedition 308; experimental studies; Gulf of Mexico; hydraulic conductivity; Integrated Ocean Drilling Program; IODP Site 1322; IODP Site 1324; laboratory studies; marine sediments; mechanical properties; North Atlantic; northern Gulf of Mexico; overpressure; sediments; soil mechanics; strain; stress; Ursa Basin; water content;

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