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Table T2. Coring summary, Hole C0001F. (See table notes.)

Hole C0001F
Latitude: 33°14.3437′N
Longitude: 136°42.7067′E
Time on hole (h): 68.5 (0830 h, 21 Nov 2007–0500 h, 24 Nov 2007)
Seafloor (drillers measurement from rig floor, m): 2225.5
Distance between rig floor and sea level (m): 28.5
Water depth (drillers measurement from sea level, m): 2197
Total depth (drillers depth below rig floor, m): 2474.3
Total penetration (core depth below seafloor, m): 248.8
Total length of cored section (m): 140.9
Total core recovered (m): 137.5
Core recovery (%): 97.6
Total number of cores: 21
Core Date
(Nov 2007)
Local time (h) Depth CSF (m) Length (m) Recovery (%) Comments
Top Bottom Cored Recovered
315-C0001F-
1H 21 1552 108.0 117.5 9.5 9.5 100.0  
2H 21 1726 117.5 127.0 9.5 9.5 100.0 With APCT3
3H 21 2021 127.0 136.5 9.5 5.0 52.1  
4H 21 2223 136.5 146.0 9.5 9.0 94.7 Overdrilled 3 m; 40 cm of bottom of liner is broken
5H 22 0205 146.0 155.5 9.5 9.9 104.0 With APCT3
6H 22 0347 155.5 161.5 6.0 6.0 100.0 Pumped twice; shot timing unclear
7H 22 0825 161.5 171.0 9.5 9.5 100.0 Overdrilled 3 m; hard to pull out liner
8H 22 1215 171.0 179.7 8.8 8.8 100.0 With APCT3; overdrilled 6 m
9H 22 1352 179.7 189.2 9.5 9.5 100.0  
10H 22 1553 189.2 196.8 7.5 7.5 100.0 Middle 4 m core liner burst
11H 22 1740 196.8 200.8 4.0 6.0 150.0 With APCT3; top and bottom were loose sand; recovery was 9.48 m; upper half of core became slime; Curator decided total length = ~ 6 m
12H 22 2009 200.8 202.4 1.6 1.6 100.0 Prepuncture liner surface for safety
13H 22 2137 202.4 207.2 4.8 4.8 100.0  
14H 22 2303 207.2 213.3 6.1 6.1 100.0  
15H 23 0058 213.3 218.9 5.6 5.6 100.0 Lower part of core tube covered with very fine sandy silt; difficult to pull out
16H 23 0239 218.9 219.6 0.8 0.8 100.0  
17H 23 0400 219.6 220.3 0.7 0.7 100.0 Pump pressure did not increase; gravity coring applied
18H 23 0629 220.3 226.5 6.2 6.2 100.0  
19H 23 0824 226.5 229.8 3.3 3.3 100.0 Formation too stiff for HPCS
20X 23 1247 229.8 239.3 9.5 9.3 98.3 Severe drilling disturbance
21X 23 1541 239.3 248.8 9.5 9.0 94.8 Severe drilling disturbance
Cored totals: 140.8 137.5 97.6  

Notes: CSF = core depth below seafloor. APCT3 = advanced piston corer temperature tool, HPCS = hydraulic piston coring system. APCT3 measurements were abandoned because of the time required to take an accurate measurement.

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