GLIMPCE - GREAT LAKES INTERNATIONAL
MULTIDICIPLINARY PROGRAM ON CRUSTAL
EVOLUTION

Acquisition Parameters for all Seismic Lines

Survey Company: Can-Nav Ltd. and Geophoto Service Ltd.
Acquisition Company: Geophysical Services Inc.
Direction: A (S to N, refraction, Superior)
           A (S to N, reflection, Superior)
           B (N to S, NE Superior)
           C (N to S, W Superior)
           F (N to S (BFlink), then E to W, E Superior)
           G (E to W, N Superior)
           H (S to N + dogleg called line 3, to ENE, N Michigan)
           I (S to N, NW Huron/Georgian Bay)
           J (E to W, E Georgian Bay to NW Huron)
           1: southern portion of line I
           2: eastern portion of line J

SOURCE

Type: Airgun Array (60 guns)
Volume: 7780 cu ft
Pressure: 1900 - 2000 psi
Depth(AVG): 6 m

INSTRUMENT

Make: DFS V
Filter: HiCut 64.0 Hz / LoCut 5.3 Hz
Sample Rate:4 ms
Record Legth: 20 s

RECEIVERS

Array: 3024 stream
Group Length: 25 m group
Depth(AVG): 10-14 m

SPREAD

Fold: 30 or 24
Sp Interval: 50 m or 62.5 m (low water temp caused streamer to sink, forcing a speed increase.)
(50 m: B)
(62.5 m: C, G, H, I, J)
(50 m and 62.5 m: A, F)
Group Interval: 50 m