Position: 44.57031°N, 125.074193°W
Water Depth: 1210 m
Sediment Thickness: >7 km
Target Drilling Depth: 620 mbsf
Approved Maximum Penetration: 620 mbsf
Seismic Coverage: TTN112 3-D high-resolution seismic survey
Objectives: To establish the source and distribution of gas hydrate in this setting, which is characterized by rapid deposition of terrestrial sediments. This site provides a test of the generality of models for hydrate formation in a region of rapid sedimentation developed from results of Leg 164.
Drilling Program: APC to refusal, XCB to refusal, RCB as necessary to reach target depth. At least two holes. Use of PCS and/or HYACE.
Logging and Downhole Program: LWD, triple combo, APC-temperature, DVTP, APC methane tools; VSP, walkaway VSP.
Nature of Rock Anticipated: Interlayered silts and clays, some authigenic carbonates possible.
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