Ocean Drilling Program: Leg 197 Scientific Prospectus

Leg 197 Operations Plan and Time Estimate
Option 1
Site	Location	Water	Operations Description	Transit	Drilling	Logging	Total
No.	Lat/Long	Depth		(days)	(days)	(days)	On-site

		(mbrf)
Yokohama	35°16.80'N		Transit 1572 nmi from Yokohama, Japan to Site HE-1B @ 11.0 kt	6.0
	139°23.40'E

HE-1B	52°53.00'N	3200	Drill ahead with a center bit to 800 mbsf.		9.6	0.9	10.5
	164°35.00'E		RCB in sediment from 800 to 950 mbsf
			Wireline logs (Triple combo and FMS)



			Transit 167 nmi from Site HE-1B to Site HE-3B @ 11.0 kt	0.6


HE-3B	50°48.60'N	2740	Drill ahead through sediment with a center bit to 450 mbsf		7.1	1.1	8.2
	167°33.00'E		RCB from 450 to 600 mbsf (150 m into basement) using FFF
			for one bit change
			Wireline logs (Triple combo, Mag Tool, and FMS)

			Transit 574 nmi from Site HE-3B to Site HE-4B @ 10.5 kt	2.3


HE-4B	41°29.00'N	1300	RCB to 190 mbsf (150 m into basement)		4.8	0.5	5.3
	170°38.00'E		Wireline logs (Triple combo and FMS)


			Transit 200 nmi from Site HE-4B to Site HE-5C @ 10.5 kt	0.8


HE-5C	38°09.50'N	1480	RCB to 210 mbsf (150 m into basement)		4.9	0.5	5.4
	170°50.00'E		Wireline logs (Triple combo and FMS)


			Transit 201 nmi from Site HE-5C to Site HE-6A @ 10.5 kt	0.8

HE-6A	34°58.94'N	1331	RCB to 230 mbsf (150 m into basement)		4.8	0.5	5.3
	172°08.98'E		Wireline logs (Triple combo and FMS)


Yokohama	35°16.80'N		Transit 1640 nmi from Site HE-6A to Yokohama, Japan @ 10.0 kt	6.8
	139°23.40'E
			TOTAL:	17.3	31.2	3.5	34.7

				TOTAL DAYS:		52.0