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Table T1. Operations, Expedition 318.
Site Location
(latitude,
longitude)
Seafloor depth (mbsl) Operations description Duration (days)
Task Transit Drilling/coring Logging
Wellington, NZ
Begin expedition







Transit from Wellington, NZ, to WLSHE-09B; ~1907 nmi @ 10.0 kt
8.0


WLSHE-09B 66°22.03835′S
142°44.70833′E
525 Hole A: Seismic survey, APC to refusal (~50 mbsf)

0.9

Hole B: Drilling with RCB center bit to 50 mbsf, RCB to 200 mbsf

1.4

- Drop bit with MBR, wiper trip, displace hole with logging mud



- Log: triple combo and FMS-sonic (12.3 h)



- Log: VSP with WST, plug hole (4.1 h)


1.2
Subtotal days on site:
3.5






Transit to WLSHE-08A; 22 nmi @ 10.0 kt
0.1


WLSHE-08A 66°5.42394′S
143°18.7707′E
525 Hole A: APC to refusal (~50 mbsf)

0.9

Hole B: Drilling with RCB center bit to 50 mbsf, RCB 50–220 mbsf

1.4

- Drop bit with MBR, wiper trip, displace hole with logging mud



- Log: triple combo and FMS-sonic (12.6 h)



- Log: VSP with WST, plug hole (4.4 h)


1.2
Subtotal days on site:
3.5






Transit to ADEL-01B; 150 nmi @ 10.0 kt
0.6


ADEL-01B
Adélie Drift
66°24.8′S
140°25.5′E
1010 Hole A: APC core sediment to refusal ~200 m, XCB diamict ~2 m

1.4

Hole B: APC core sediment to refusal ~200 m

0.9

Hole C: APC core sediment to refusal ~200 m

0.9

- Log: triple combo and FMS-sonic (13.0 h)


1.1
Subtotal days on site:
4.3






Transit to WLRIS-02A; 145 nmi @ 10.0 kt
0.6


WLRIS-02A 64°1.09973′S
139°48.28302′E
3705 Hole A: APC/XCB to refusal ~500 mbsf, plug with cement

4.5

Hole B: Drill with RCB center bit to 500 mbsf, RCB 500–1050 mbsf

8.4

- Contingency FFF assumes interruption by iceberg (12 h)

0.5

- Drop bit with MBR, displace hole with logging mud



- Log: triple combo and FMS-sonic (28.2 h)



- Log: VSP with WST, plug hole (12.8 h)


2.8
Subtotal days on site:
16.2






Transit to WLRIS-04A; 121 nmi @ 10.0 kt
0.5


WLRIS-04A 64°54.23754′S
143°57.68046′E
3075 Hole A: APC/XCB to refusal ~500 mbsf, plug with cement

4.1
Hole B: Drill with RCB center bit to 500 mbsf, RCB 500–1000 mbsf



- Contingency FFF assumes interruption by iceberg (12 h)

0.5

- Drop bit with MBR, displace hole with logging mud

6.5

- Log: triple combo and FMS-sonic (27.3 h)



- Log: VSP with WST, plug hole (12.0 h)


2.4
Subtotal days on site:
13.5






Transit from WLRIS-04A to Wellington; 1997 nmi @ 10.0 kt
8.2


Wellington, NZ
End expedition

18.0
32.3
8.7


Subtotal time on site:

41.0




Total operating days:

59.0




Total expedition (including 5 port call days)

64.0



Note: APC = advanced piston corer, RCB = rotary core barrel, MBR = mechanical bit release, triple combo = triple combination, FMS = Formation MicroScanner, VSP = vertical seismic profile, WST = Well Seismic Tool, XCB = extended core barrel, FFF = free-fall funnel.

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