Site summaries (continued)

Site YB-1 (Yamato Basin, Japan Sea)

Priority: Primary (high)
Position: 35°57.92′N, 134°26.06′E (WGS 84)
Water depth (m) 316
Target drilling depth (mbsf): 500
Approved maximum penetration (mbsf): 500
[EPSP 2008] *Pending request to EPSP for 550
Previous drilling in area: ODP Site 798; piston Core GH872-308
Comments: Old site name: JS-10B
Jurisdiction: Japan EEZ
Potential hazards: typhoon season (June to October)
Survey coverage (track map, seismic profile): High-resolution seismic reflection:
• Primary line(s): KR07-12, Line St4-3-4 (SP1140) (Fig. AF15)
• Crossing lines(s): KR07-12, Line St4-1-2 (SP1250) (Fig. AF16)
3.5 kHz: KR07-12: Line St4-3-4, Line St4-1-2
Swath bathymetry: KR07-12, Line St4-3-4, Line St4-1-2 (Fig. AF17)
Objectives (see text for complete details): High-resolution reconstruction of dust flux, as well as other paleoceanographic records, in the southern part of the Japan Sea during the last 2 m.y.
Drilling, coring, and downhole measurements program: Triple APC to 200 mbsf; single XCB to 500 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