Ocean Drilling Program

Leg 204 Preliminary Report

Drilling Gas Hydrates on Hydrate Ridge, Cascadia Continental Margin

7 July–2 September 2002

TABLE OF CONTENTS

• TITLE PAGE
• PUBLISHER'S NOTES
• DISCLAIMER
• SHIPBOARD PARTICIPANTS
  • Shipboard Scientific Party
  • Transocean Officials
  • ODP Shipboard Personnel and Technical Representatives
  • Media Representatives
• ABSTRACT
  
• INTRODUCTION
  
• GEOLOGIC AND BIOGEOCHEMICAL SETTING
  
  • Seafloor Observations of Southern Hydrate Ridge
• HIGH-RESOLUTION 3-D SEISMIC DATA
  
  • Horizon A
  • Seismic Signature of the Southern Summit
  • Horizons B and B' on the Eastern Flank of Hydrate Ridge
  • Slope Basin East Of Hydrate Ridge
• SCIENTIFIC OBJECTIVES
  
  • Stratigraphic and Structural Controls on Hydrate Development
  • Formation of Massive Hydrate near the Seafloor
  • Methane Sources and Geochemical Effects of Hydrate Formation and Dissociation
  • Geochemical Impact on the Geological Record
  • Calibration of Geophysical Estimates of Hydrate and Gas Volumes
  • Hydrates and Slope Stability
• DRILLING STRATEGY
• OPERATIONAL SUMMARY
• SITE SUMMARIES
  • Site 1244
  • Site 1245
  • Site 1246
  • Site 1247
  • Site 1248
  • Site 1249
  • Site 1250
  • Site 1251
  • Site 1252
• CONCLUSIONS
• REFERENCES
• TABLE CAPTIONS AND TABLES
• FIGURE CAPTIONS AND FIGURES
  

Date posted: 5 December 2002

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