IODP Expedition 320/321 Scientific Prospectus

doi:10.2204/iodp.sp.320321.2008

Site summaries (continued)


PEAT-6 Line 8:	2006 JD 087 08:14:59 UTC, SP 19103
Nearest crossing:	PEAT-6 Line 1 at 2006 JD 087 08:26:19 UTC, SP 16216 (SP 19171 on Line 8 using ship's position)
Estimated crustal age (Ma):	26–27
Ship location:	SP 19103: 5°18.807’N, 126°16.998’W
Basement depth (m):	4723 (6.257 s TWT)
Sediment thickness (m):	361 (estimated) (0.441 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-6C was initially chosen near the intersection of Lines 1 and 8. The thickness of the deposits in basins along the seismic lines are typical. The site was then moved south along seismic Line 8 where it was originally located in order to obtain a better imaged basement reflector and to capture the slightly expanded lower target section. Subbottom profiler sections image ~100 m of layered sediments in the upper sediment column.