Table
T1. Acquisition
parameters of seismic reflection data used in selecting proposed drill sites on
the Kerguelen Plateau and Broken Ridge.
Research
vessel:
Cruise number:Rig
Seismic
47Marion
Dufresne
47Robert
Conrad
2708Rig
Seismic
179Rig
Seismic
180Marion
Dufresne
109
Region:
Kerguelen
Plateau
Kerguelen
Plateau
Broken
Ridge
Kerguelen
Plateau
Kerguelen
Plateau
Kerguelen
Plateau
Year:
1985
1986
1986
1997
1997
1998
Designation:
RS47
MD47
C2708
RS179
RS180
MD109
Navigation:
Transit
satellite
Transit
satellite
Transit
satellite
Differential
GPS
Differential
GPS
GPS
Source:
2
air guns
1
Flexichoc
2
water guns
20
sleeve air guns
20
sleeve air guns
10
GI air guns
Volume:
1000
in3
NA
160
in3
3000
in3
3000
in3
1050
in3
Shot
interval:
~50
m
~50
m
~65
m
~50
m
~50
m
~50
m
Sample
interval:
2
ms
4
ms
1
ms
2
ms
2
ms
4
ms
Record
length:
7
s + delay
4
s
9
s
16
s
16
s
17
s
Streamer
length:
1200
m
2400
m
?
3000
m
3000
m
2400
m
Number
of groups:
48
48
1
240
240
96
Group
interval:
25
m
50
m
NA
12.5
m
12.5
m
25
Processing:
Stack
Stack
NA
F-x
migration
F-x
migration
F-k
migration
Notes: GPS = Global Positioning System, GI = Generator-Injector. NA = not applicable, ? = unknown. F-x = frequency-distance, F-k = frequency-wave number.