Integrated Ocean Drilling Program

Expedition 311 Preliminary Report

Cascadia Margin Gas Hydrates

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TABLE OF CONTENTS

• COVER PAGE
• PUBLISHER'S NOTES
• PARTICIPANTS
  • Expedition 311 Scientists
  • Transocean Officials
  • IODP Shipboard Personnel and Technical Representatives
• ABSTRACT
• INTRODUCTION
• RESULTS
  • Site U1325
  • Site U1326
  • Site U1327
  • Site U1328
  • Site U1329
• SUMMARY AND IMPLICATIONS
  • Occurrence of Gas Hydrate
  • Gas Hydrate Stability Calculations
  • Core Analysis
  • Downhole Logging Analysis
  • Pressure Core Analysis
  • Remote Sensing Calibration
  • Gas Hydrate Geologic System
• PRELIMINARY SCIENTIFIC ASSESSMENT
• REFERENCES
• TABLES
  • Table T1. Operations summary.
  • Table T2. Temperature tool deployments.
  • Table T3. Pressure coring results.
• FIGURES
  • Figure F1. Drilling transect.
  • Figure F2. Marine gas hydrate cycle.
  • Figure F3. MCS Line 89-08.
  • Figure F4. Multibeam bathymetry along transect.
  • Figure F5. Multibeam bathymetry over accreted ridge.
  • Figure F6. Borehole fluid pressure profiles.
  • Figure F7. MCS over Site U1325.
  • Figure F8. Comparison of seismic, logging, and core data, Site U1325.
  • Figure F9. Comparison of seismic, logging, and core data, Site U1325.
  • Figure F10. MCS Line PGC9902-ODP7, Site U1326.
  • Figure F11. SCS Line PGC0408-CAS03B-X03, Site U1326.
  • Figure F12. MCS Line 89-08 section, Site U1326.
  • Figure F13. Data compilation, Site U1326.
  • Figure F14. Bathymetry at Site U1327.
  • Figure F15. MCS Inline 38 section, Site U1327.
  • Figure F16. Data compilation, Site U1327.
  • Figure F17. MCS Line XL07 section, Site U1328.
  • Figure F18. Downhole logging data with Line XL07 data, Hole U1328A.
  • Figure F19. Downhole logging data with MCS data, Hole U1328A.
  • Figure F20. Seismic section from MCS.
  • Figure F21. SCS Line CAS05C-01-04.
  • Figure F22. Core and downhole logging data with MCS data, Site U1329.
  • Figure F23. Core and downhole logging data with SCS data, Site U1329.
  • Figure F24. Pore-filling gas hydrate.
  • Figure F25. Hydrate samples.
  • Figure F26. In situ temperatures.
  • Figure F27. Interstitial water chlorinity.
  • Figure F28. Core liner temperatures.
  • Figure F29. Methane/ethane gas profiles.
  • Figure F30. Pore water saturations.
  • Figure F31. Methane phase diagram.
  • Figure F32. SMI at all sites.
  
  

  Date posted: 19 December 2005

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