Site summaries (continued)

Site YR-1 (Yamato Ridge, Japan Sea)

Priority: Primary (very high)
Position: 39°29.44′N, 134°26.55′E (WGS 84)
Water depth (m) 1917
Target drilling depth (mbsf): 450
Approved maximum penetration (mbsf): 450
[EPSP 2008] *Pending request to EPSP for 500
Previous drilling in area: ODP Site 799
Piston cores: KR07-12, St. 7’’, PC-05 and PC-08
Comments: Old Site Number: JS-3B
Jurisdiction: Japan EEZ
Potential hazards: typhoon season (June to October)
Survey coverage (track map, seismic profile): Bathymetric sketch and site track map (Fig. AF10)
High-resolution seismic reflection:
• Primary line(s): KR07-12, Line st7’’-1-2 (SP100) (Fig. AF11)
• Crossing lines(s): KR07-12, Line st7’’-5-6 (SP510) (Fig. AF12)
3.5 kHz and swath bathymetry: KR07-12, Lines st7’’-1-2, st7’’-5-6
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 5 m.y.
Drilling, coring, and downhole measurements program: Triple APC to 200 mbsf; double XCB to 450 mbsf
Temperature measurements: APCT-3
Orientation on first hole: FlexIt
Downhole logging program: Standard tools: triple combo, FMS-sonic
Anticipated lithology: Diatomaceous clay to silt