Site summaries (continued)

Site ECS-1A (East China Sea-Danjo Basin)

Priority: Alternate
Position: 31°38.30′N, 128°56.60′E (WGS 84)
Water depth (m) 746
Target drilling depth (mbsf): 200
Approved maximum penetration (mbsf): *Pending request to EPSP for 500
Previous drilling in area: Piston cores: KR07-12, St. 2, PC-01
Comments: Jurisdiction: Japan EEZ
Potential hazards: typhoon season (June to October)
Survey coverage (track map, seismic profile): Seismic single-channel survey:
• Cross section of Seismic line 1 (Fig. AF27)
• Cross section of Seismic line 4 (Fig. AF28)
High-resolution seismic reflection:
• Primary line(s) KY07-04, Line 7; Crossing Lines(s): KY07-04, Line 8
Deep-penetration seismic reflection:
• Primary line(s): KR07-12, st2-1-2; Crossing Lines(s): KR07-12, st2-5-6 Seismic grid:
• (MCS) KR07-12, Lines st2-1-2, st2-3-4, st2-5-6
• (SCS) KY07-04, Line 1, 2a, 2b, 3, 4, 5, 7, 8
3.5 kHz: KR07-12, Line st2-1-2, Line st2-5-6
Swath bathymetry: KR07-12, Line st2-1-2, Line st2-5-6 (Fig. AF29)
Objectives (see text for complete details): High-resolution reconstruction of SSS and SST in the southern part of the East China Sea during the last 3–5 m.y.
Drilling, coring, and downhole measurements program: Triple APC to 200 mbsf
Temperature measurements: APCT-3
Orientation on first hole: FlexIt
Downhole logging program: Standard tools: paleo combo, FMS-sonic
Anticipated lithology: Diatomaceous clay to silt