Site summaries (continued)

Site GC-04B

Priority: High
Position: Lat 36°15'24.96"N (36°15.416), Long 6°48'16.4"W (–6°48.273) (WGS 84)
Water depth (m) 686
Target depth (mbsf): 1548 (primary operation plan based on 1139 m penetration)
Approved maximum penetration (mbsf): Pending EPSP/TAMU Safety Panel approval
Previous drilling in area: None
Comments: Jurisdiction: Spain
Potential hazards: shallow gas, shallow-water flow, soft seabed, strong currents
Survey coverage (track map, seismic profile) • Bathymetric sketch with site location and seismic lines on the contourite depositional system on the middle slope of the Gulf of Cádiz (Close to the Strait of Gibraltar) (Fig. AF4)
• Multichannel seismic reflection (MCS) profile (Line S81A-16) across the middle slope (Fig. AF5).
Objectives (see text for complete details): Influence of the Gibraltar Gateway on MOW during the Quaternary and late Pliocene
Drilling/coring program: Double APC to refusal, then single XCB/RCB hole to 1139 mbsf
Temperature measurements: APCT-3
Downhole logging program: Standard tools: triple combo, FMS-sonic, VSI
Anticipated lithology: Mainly sands, but also silts and clays