Table T9. Multichannel seismic surveys associated with the continental shelf and rise sites.
| British Antarctic Survey(Discovery) | Brazilian Antarctic Program(Almirante Cāmara) | Osservatorio Geofisico Sperimentale(OGS-Explora) | Univ. Granada-CSIC(Hesperides) | Japanese
National Oil Co.(Hakurei Maru) |
|||
|---|---|---|---|---|---|---|---|
Depositional environment: |
Shelf |
Shelf |
Shelf |
Rise |
Rise and Shelf |
Shelf |
Shelf |
Survey/profile: |
1984-85/AMG 845-08, -10 |
1986-87, 1987-88/BRAZ5-28 |
1995/I95-152 |
1995/I95-130-135A-137 |
1989, 1992/IT89-47 IT92-109-114; |
1997/AISM02-06 -11-12 |
1996/HM-96 |
Leg 178 sites: |
1100-1102, 1103 |
1100-1102, 1103 |
1100-1102, 1103 |
1095, 1096 |
1096, 1097, 1101 |
1097 |
1101-1103, 1103 |
Source |
|||||||
Gun types: |
Bolt array |
Bolt array |
GI |
GI |
Bolt array |
Bolt air gun |
GI |
Number of guns: |
4 |
8 |
2 |
2 |
2 × 20 |
5 |
4 |
Total volume: |
15.8 L (964 in3) |
8.8 L (536 in3) |
6.8 L (420 in3) |
6.8 L (420 in3) |
72 L (4390 in3) |
22.4 L (1365 in3) |
9.83 L (600 in3) |
Tow depth (m): |
10 |
7 |
6 |
7 |
6 |
7 |
15 |
Shot interval (m): |
50 |
50 |
25 |
25 |
50 |
25 |
50 |
Sensors |
|||||||
Number of traces: |
48 |
72 |
120 |
120 |
120 |
96 |
192 |
Length of streamer (m): |
2400 |
1800 |
1500 |
3000 |
3000 |
2400 |
2400 |
Trace interval (m): |
50 |
25 |
12.5 |
25 |
25 |
25 |
12.5 |
Tow depth (m): |
10 |
10-11 |
8 |
12 |
50 |
7-9 |
15 |
Recording |
|||||||
Coverage: |
24-fold |
18-fold |
30-fold |
60-fold |
30-fold |
24-fold |
24-fold |
Sampling rate (ms): |
4 |
4 |
2 |
2 |
4 |
2 |
4 |
Record length: |
8 s |
8 s |
8 s |
8 s |
14 s |
5 s |
10 ms |
Notes: Acquisition parameters are indicated. GI = Generator Injector.