Site Summaries (continued) | Table of Contents
SITE SUMMARIES (continued)
Site: COC-3A
Priority: 2
Position: 4°37.089´N, 86°42.334´W
Water Depth: 919 m
Sediment Thickness: 143 m
Target Drilling Depth: 150 mbsf
Approved Maximum Penetration: 150 mbsf
Seismic Coverage: Sediment thickness: 0.183 s (143 m)
Primary Site: 2000 NEMO-3 (Melville), COC-3 survey Line 4, JD146 01:09:09z (SP416)
Crossing line: 2000 NEMO-3 (Melville), COC-3 survey Line 7
Seismic Line 4 | Seismic Line 7 | Bathymetry map
Objectives: The objectives at Site COC-3A are to provide a continuous sedimentary sequence to:
1. Sample lower intermediate waters.
2. Assess variations of the low-salinity, shallow pycnocline region of the Northern Panama Basin.
Drilling Program: Triple APC to refusal. Tensor orientation on APC cores.
Logging and Downhole: None
Nature of Rock Anticipated: Site survey core is composed of sandy foram ooze with occasional
dispersed ash. The basement age should be 5-7 Ma (assuming hotspot crust, Christie et al., 1992),
which implies a sedimentation rate of 20-30 m/m.y. If acoustic basement is younger coral or an
erosion surface, sedimentation rate may be higher.
