Data report; Consolidation characteristics of sediments from IODP Expedition 308, Ursa Basin, Gulf of Mexico

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doi: 10.2204/iodp.proc.308.204.2008
Author(s): Long, Hui; Flemings, Peter B.; Germaine, J. T.; Saffer, D. M.; Dugan, Brandon
Integrated Ocean Drilling Program, Expedition 308 Scientists, College Station, TX
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Energy and Mineral Engineering, University Park, PA, United States
Albert-Ludwigs-Universität Freiburg, Federal Republic of Germany
University of California-Santa Cruz, United States
Lamont-Doherty Earth Observatory, United States
Kyoto University, Japan
University of Tokyo, Japan
Rice University, United States
Lulea University of Technology, Sweden
Universität Bremen, Federal Republic of Germany
Southampton Oceanography Centre, United Kingdom
University of Virginia, United States
Universidad de Granada, Spain
Nanjing University, Japan
Tongji University, Japan
Japan Agency for Marine-Earth Science and Technology, Japan
Shell International Exploration and Production, United States
University of Leicester, United Kingdom
Florida State University, United States
University of Tsukuba, Japan
Hokkaido University, Japan
Universitat de Barcelona, Spain
Shizuoka University, Japan
Vrije Universiteit Amsterdam, Netherlands
University of Texas at Austin, United States
Massachusetts Institute of Technology, United States
Volume Title: 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
Volume Author(s): Flemings, Peter B.; Behrmann, Jan H.; John, Cédric M.; Iturrino, Gerardo J.; Aizawa, Yasutaka; Nguyen Thi Thanh Binh; De Silva, Neil; Dugan, Brandon; Edeskar, Tommy M.; Franke, Christine; Gay, Aurélien; 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
Source: 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, Peter B. Flemings, Jan H. Behrmann, Cédric M. John, Gerardo J. Iturrino, Yasutaka Aizawa, Nguyen Thi Thanh Binh, Neil De Silva, Brandon Dugan, Tommy M. Edeskar, Christine Franke, Aurélien Gay, William Patrick Gilhooly, III, Julia Gutierrez-Pastor, Jiang Shaoyong, Li Qianyu, Hui Long, J. Casey Moore, Takuro Nunoura, Carlos Pirmez, Marc Reichow, Derek E. Sawyer, Julia Schneider, Anatoliy V. Shumnyk, Takahiro Suzuki, Yoshinori Takano, Roger Urgeles, Yuzuru Yamamoto and Valentina Zampetti; Integrated Ocean Drilling Program, Expedition 308 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program, Vol.308. Publisher: IODP Management International, Washington, DC, United States. ISSN: 1930-1014
Note: In English. 5 refs.; illus., incl. 4 tables, sketch map
Summary: 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 2.18×10-11 to 6.38×10-10 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 1.5×10-8 to 4.2×10-7 m2/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 (σ'vh) at both sites, which suggests that Ursa sediments are overpressured.
Year of Publication: 2006
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 30 Engineering Geology; Atlantic Ocean; Compression; Consolidation; Consolidometer tests; Cores; Expansion; Expedition 308; Experimental studies; Gulf of Mexico; Hydraulic conductivity; IODP Site U1322; IODP Site U1324; Integrated Ocean Drilling Program; Laboratory studies; Marine sediments; Mechanical properties; North Atlantic; Northern Gulf of Mexico; Overpressure; Sediments; Soil mechanics; Strain; Stress; Ursa Basin; Water content
Coordinates: N280600 N280600 W0890100 W0890200
N280500 N280500 W0890800 W0890800
Record ID: 2008102411
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