Integrated Ocean Drilling Program

Expedition 301 Preliminary Report

Juan de Fuca Hydrogeology

The hydrogeologic architecture of basaltic oceanic crust: compartmentalization, anisotropy, microbiology, and crustal-scale properties on the eastern flank of Juan de Fuca Ridge, eastern Pacific Ocean

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TABLE OF CONTENTS

• COVER PAGE
• PUBLISHER'S NOTES
• SHIPBOARD PARTICIPANTS
  • Shipboard Scientific Party
  • Transocean Officials
  • IODP Shipboard Personnel and Technical Representatives
• ABSTRACT
• INTRODUCTION
• BACKGROUND
  • Geological Setting
  • Site Survey for IODP Expedition 301
  • Selected Results from ODP Leg 168
• SCIENTIFIC AND OPERATIONAL OBJECTIVES OF EXPEDITION 301
  • Hydrogeologic Testing
  • Microbiological Analyses
  • Tracer Tests
  • Borehole and Offset-Vertical Seismic Profile Experiments
• OPERATIONAL STRATEGY AND OVERVIEW OF EXPEDITION ACHIEVEMENTS
  • Operational Strategy
  • Overview of Expedition Achievements
• SITE RESULTS
  • Site 1026
  • Site U1301
  • Sediments
  • Basement
• OPERATIONS
  • Astoria, Oregon, Port Call
  • Site U1301
  • Site 1026
• REFERENCES
• FIGURES
  • Figure F1. Regional bathymetric map.
  • Figure F2. Summary of selected results from ODP Leg 168 and related experiment.
  • Figure F3. Second Ridge maps.
  • Figure F4. Examples of MCS seismic data from the 2000 ImageFlux survey.
  • Figure F5. Permeability of upper oceanic crust versus crustal age and measurement scale.
  • Figure F6. Crustal-scale hydrogeologic testing.
  • Figure F7. Cell density data from ODP sediment core.
  • Figure F8. Cartoon illustrating selected features of three CORK borehole observatory systems.
  • Figure F9. Penetration rates in Holes U1301A and U1301B.
  • Figure F10. Summary of selected data from basement in Hole U1301B.
  • Figure F11. Hole U1301A reentry cone.
  • Figure F12. Hole U1301B reentry cone.
  • Figure F13. Calculated tides.
  • Figure F14. Schematic of Hole U1301A reentry cone and borehole casing, CORK borehole completion, and instrument string.
  • Figure F15. The wireline-conveyed mechanical deployment tool (Lula).
  • Figure F16. Fabricated fishing tool.
  • Figure F17. Schematic of Hole U1301B reentry cone and borehole casing, CORK borehole completion, and instrument string.
  • Figure F18. Hole U1301B ROV/submersible platform being prepared for deployment.
  • Figure F19. Photograph of Hole 1026B CORK.
  • Figure F20. Fabricated fork-shaped fishing tool.
  • Figure F21. Retrieval of old Hole 1026B CORK and ROV platform.
  • Figure F22. The old Leg 168 CORK body on deck.
  • Figure F23. The new Hole 1026B CORK head being lifted into the derrick.
  • Figure F24. Schematic of Hole 1026B reentry cone and borehole casing, CORK-II borehole completion, and instrument string.
• TABLES
  • Table T1. Expedition 301 operational steps with start and end times and dates.
  • Table T2. Hole and related site locations.

Date posted: 2 November 2004

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