Consolidation, effective stress, and fluid pressure of sediments from ODP Site 1073, US mid-Atlantic continental slope

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doi: 10.1016/S0012-821X(03)00425-4
Author(s): Dugan, Brandon; Flemings, Peter B.; Olgaard, David L.; Gooch, M. J.
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Geosciences, University Park, PA, United States
ExxonMobil Upstream Research Company, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 215(1-2), p.13-26. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Includes appendix. 31 refs.; illus., incl. 4 tables, sketch map
Summary: Fluid pressure interpreted from uniaxial consolidation tests equals 80% of the overburden (total) stress in Pleistocene mudstones at Ocean Drilling Program (ODP) Site 1073 of the US mid-Atlantic continental slope, offshore New Jersey. The fluid overpressure decreases effective vertical stress and preserves void ratio (e) greater than 0.8 in Pleistocene sediments. Overpressure in Oligocene-Miocene sediments is lower even though e is high. Cementation preserves high void ratio of Oligocene-Miocene sediments and therefore the void ratio does not record overpressure and low effective vertical stress. Sedimentation-flow models simulate overpressure and high void ratio in the Pleistocene sediments when fluid flow is coupled with sediment loading at ODP Site 1073. Lateral fluid migration is interpreted to be focused in the Oligocene-Miocene sediments, which are 2.5 times more permeable than the overlying Pliocene-Pleistocene mudstones. The lateral flow provides fluids to ODP Site 1073 to maintain high void ratio, high overpressure, and low effective vertical stress. Abstract Copyright (2003) Elsevier, B.V.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 30 Engineering Geology; Atlantic Ocean; Cementation; Cenozoic; Clastic rocks; Consolidation; Continental slope; Diagenesis; Elastoplastic materials; Experimental studies; Fluid pressure; Leg 174A; Marine sediments; Miocene; Mudstone; Neogene; New Jersey; North Atlantic; Northwest Atlantic; ODP Site 1073; Ocean Drilling Program; Oligocene; Overburden; Overpressure; Paleogene; Permeability; Plastic materials; Pleistocene; Pliocene; Quaternary; Sedimentary rocks; Sediments; Soil mechanics; Stress; Tertiary; Uniaxial tests; United States
Coordinates: N391331 N391331 W0721633 W0721633
Record ID: 2004082836
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands