Location: Middle Valley, Juan de Fuca Ridge, northeast Pacific Ocean
Priority: 1
Position: 48°26.020'N, 128°40.859'W
Water Depth: 2434 m
Sediment Thickness: 13 m
Total Penetration: >250 mbsf
Seismic Coverage: Multichannel Line 89-14
Objectives: Deepen Hole 856H or drill a new hole through the massive sulfide deposit and the underlying alteration zone
Drilling Program: Reenter open and unobstructed Hole 856H with either MDCB or RCB. Alternatively, drill-in a casing to isolate the upper part of the formation and MDCB or RCB to TD.
Logging and Downhole Operations: Temperature log, full Schlumberger suite, FMS, geochemical log
Nature of Rock Anticipated: Massive sulfide, interbedded hydrothermally altered basalt, and hemipelagic and turbiditic sediment