EDMED Details

General

Dataset Name

Seismic reflection and refraction, magnetic, gravimetric survey of Ross Sea, Antarctica (1989-90)

Data Holding Centre

OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Geophysics

Time Period

from 1989 to 1990

Start Date

1989-01-01

End Date

1990-12-31

Project

Geographic Area

Geocoverage

2,562 km on 30 lines of seismic reflection, gravimetric and magnetometric survey of Ross Sea area

Geographic Box (south,north,west,east)

-75, 163, 167, -73

Sea Area

Southern Ocean

Observations

Parameters

Gravity

Seismic reflection

Seismic refraction

Magnetics

Instruments

multi-channel seismic reflection systems

magnetometers

seismic refraction systems

gravimeters

satellite positioning systems

Description

Summary

PNRA (Italian Research Programme in Antarctica) - 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 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. In the Ross Sea 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 The third part of the survey has been dedicated to the Ross Sea area, where seismic refraction data have been collected using sonobuoys. Four sites of particular interest were occupied and the data acquisition system was modified as follows: Coverage = 6000 % Sample Rate = 2 ms Shot Interval = 25 m Streamer Length = 3000 m Streamer Depth = 12 m Group Interval = 25 m Number of Groups = 120 Record Length = 6 sec Air-Guns: - Total Volume = 22.5 l - Pressure = 140 bar - Depth = 6 m A total amount of 2,562 km of seismic refraction profiles and 31 datasets has been collected.

Originator

OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Geophysics

References

Availability

Availability

by negotiation

Organization

OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Geophysics

Contact

Unknown

Address

OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Division of Geophysics

Sgonico (Trieste),

34010

Italy

webmaster@ogs.trieste.it

http://www.ogs.trieste.it

Administration

Local identifier

1228

Creation Date

2014-10-02

Revision Date

2013-07-26