1,280 km on 6 lines of seismic reflection, gravimetric and magnetometric survey of Balleny Islands area

Gravity; Seismic reflection

Multi-channel seismic reflection systems; seismic refraction systems; gravimeters; satellite positioning systems

During the austral summer 1989-90 and in the framework of the Italian National Research Program in Antarctica coordinated by ENEA, the third geophysical survey was conducted in the waters surrounding Antarctica, with the systematic collection of seismic reflection, gravity and magnetic data. Some seismic refraction profiles have also been acquired in cooperation with the United States Geological Survey (USGS). The survey was conducted in three different areas: the Antarctic Peninsula, the South Pacific Ocean and the Ross Sea. The second part of the survey has been dedicated to the South Pacific Ocean (Balleny Islands area), where 1,280 km of profiles have been collected. The data have been collected with the following sampling parameters: Coverage = 3000 % Sample Rate = 4 ms Shot Interval = 50 m Streamer Length = 3000 m Streamer Depth = 12 m Group Interval = 25 m Number of Groups = 120 Record Length = 14 sec Air-Guns: - Total Volume = 45.16 l - Pressure = 140 bar - Depth = 6 m

National Institute of Oceanography and Applied Geophysics - OGS, Division of Geophysics
Borgo Grotta Gigante 42/c
Sgonico (Trieste),

34010
Italy