168 Prospectus

Site: PP-2A

Priority: 2
Position: 47°46.71´N; 127°44.47´W
Water Depth: 2682 m
Sediment Thickness: 265 m
Total Penetration: 265 mbsf (stop at first basement penetration)
Seismic Coverage: Line 95-27, SP 370 (Fig. 6A, Appendix 1B)

Objectives: At the Permeable Penetrators site relatively rugged relief of the igneous crust is buried by sediment everywhere, except at three small volcanic edifices where fluids vent through the seafloor. Holes spanning the primary basement relief will allow determination of the lateral thermal and chemical gradients in the upper igneous crust, and the buoyancy forces that drive fluid flow. The holes will also extend the overall drilling transect to 3.5 Ma.

Drilling Program: APC/XCB

Logging and Downhole: APC temperature measurements at every or every other core, approximately six temperature probe trips

Nature of Rock Anticipated: Turbidite sediments, altered basalt

To Site PP-3A

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