Priority: 2 (alternate to APSHE-11A)
Position: 66°46.55'S, 69°33.35'W
Water Depth: 375 m
Sediment Thickness: >1000 m
Approved Maximum Penetration: 620 mbsf
Seismic Coverage: Line PD88-04 (0830/002). Intersection: Line IT92-111 SP 1125.
Objectives: The objectives of Site APSHE-12A are to:
1. Obtain a record of "pre-glacial" sedimentation in the inner shelf basin.
2. Provide constraints on the history of vertical motion associated with ridge-crest collision.
Drilling Program: Single RCB hole.
Logging and Downhole Operations: Standard suites IPLT-DLT and FMS-sonic, plus GHMT.
Nature of Rock Anticipated: Diamicton intercalated with thin hemipelagic layers down to IS1/IS2 boundary. Volcaniclastic sandstones and mudstones below IS1/IS2 boundary.
Note: seismic line same as Site APSHE-05A
To 178 Site APSHE-15
To 178 Table of Contents