A permeability estimate in 56 Ma crust at ODP Hole 642E, Voring Plateau Norwegian Sea

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doi: 10.1016/j.epsl.2007.11.055
Author(s): Harris, Robert N.; Higgins, Sean M.
Author Affiliation(s): Primary:
Oregon State University, College of Oceanic and Atmospheric Sciences, Corvallis, OR, United States
Other:
Lamont-Doherty Earth Observatory, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 267(1-2), p.378-385. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. 30 refs.; illus., incl. sect., geol. sketch map
Summary: Temperature measurements made in Ocean Drilling Program (ODP) Hole 642E are used to estimate bulk crustal permeability. Hole 642E is located on the Voring Plateau near the transition between oceanic and continental crust on a volcanically rifted margin. A temperature-depth profile measured 20 yr after the hole was drilled indicates fluid flowing from the basement, up the Hole and into the ocean. This flow regime suggests that the basement is naturally over pressured with respect to hydrostatic. We estimate the up-hole flow rate to be approximately 6-11 m h-1. This flow rate, coupled with an estimated minimum differential overpressure of 13-20 kPa, and an estimated aquifer thickness of 100 m, yields a bulk permeability of 10-13 m2. This result suggests that fluid flow through basement may be an important component of passive margin hydrology.
Year of Publication: 2008
Research Program: IODP Integrated Ocean Drilling Program
ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Arctic Ocean; Boreholes; Crust; Density; Expeditions 303/306; Geothermal gradient; Ground water; Heat flow; Hydrostatic pressure; Integrated Ocean Drilling Program; Meteoric water; Movement; Norwegian Sea; ODP Site 642; Ocean Drilling Program; Ocean floors; Oceanic crust; Overpressure; Passive margins; Permeability; Porosity; Resistivity; Rifting; Temperature; Velocity; Voring Plateau; Well logs
Coordinates: N671312 N671330 E0025548 E0025542
Record ID: 2008109574
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands