169 Prospectus

Site: ET5

Location: Escanaba Trough, southern Gorda Ridge, northeast Pacific Ocean

Priority: 1

Position: 41°00'N, 127°29'W

Water Depth: 3250 m

Sediment Thickness: 200 m

Total Penetration: >400 mbsf

Seismic Coverage: Single-channel, Tully, 89-04, Line 3

Objectives: Determine extent and composition of hydrothermal mineralization and alteration in an active hydrothermal massive sulfide deposit, determine depth to and composition of basement.

Drilling Program: Multiple reentry, drill-in casing, RCB/MDCB to 400 m or as deep as possible.

Logging and Downhole Operations: Temperature log, full Schlumberger suite, FMS, geochemical log

Nature of Rock Anticipated: Massive sulfide and hydrothermally altered hemipelagic and turbiditic sediment, hydrothermally altered basalt

To Site BH2

169 Table of Contents

Publications Home

ODP Home