IODP Expedition 320/321 Scientific Prospectus

doi:10.2204/iodp.sp.320321.2008

Site summaries (continued)


PEAT-2 Line 6:	2006 JD 096 17:52:29 UTC, SP 32971
Nearest crossing:	Line 1 and Line 6 cross at 2006 JD 096 17:55:22 UTC, SP 32987 (L6) and 2006 JD 096 09:39:41 UTC, SP 30013 (L1)
Estimated crustal age (Ma):	49–50
Ship location:	SP 32971: 11°54.760’N, 141°02.748’W
Basement depth (m):	5103 (6.793 s TWT)
Sediment thickness (m):	162 from Leg 199 composite (0.205 s TWT)
Velocity (Busch et al., 2006):	Depth (mbsf)	TWT (ms)	Velocity (m/s)
	0–50	0–65	1540
	50–250	65–315	1600
	250–TD	>315	1660
Site PEAT-2C was sited close to the intersection between Lines 1 and 6 to maximize the thickness of the deeper section and minimize a set of high-amplitude, flat reflectors south of the crossing lines (possible chert, "peg-leg" type reflector between SPs 32713 and 32932). The cross and proposed drill sites are within the deep sediment fill between to north-south–running minor basement hills.