IODP Expedition 320/321 Scientific Prospectus

doi:10.2204/iodp.sp.320321.2008

Site summaries (continued)


PEAT-7 Line 4:	2006 JD 084 16:53:48 UTC, SP 1756
Nearest crossing:	PEAT-7C Line 10 at 2006 JD 084 23:20:59 UTC, SP 4071
Estimated crustal age (Ma):	24
Ship location:	SP 1756: 3°50.006’N, 123°12.352’W
Basement depth (m):	4966 (6.522 s TWT)
Sediment thickness (m):	452 (estimated) (0.534 s TWT)
Velocity (Mayer et al., 1985):	Depth (mbsf)	Velocity (m/s)
	0–100	1520
	100–193	1613
	193–410	1650
	>410	1970
Site PEAT-7C was chosen near the intersection of Lines 4 and 10. The section is typical in the thickness of the deposits within the small basins imaged along Line 4. The site was moved to the west side of the basin so that it would be over well-imaged basement. Subbottom profiler sections image ~80 m of layered sediments in the upper sediment column.