Reflection seismic, magnetic, gravimetric survey of the Pacific Margin of the Antarctic Pe

Geophysical survey data from the Antarctic summers of 1989-1990 and 1991-1992, collected by the Italian OGS Explora research vessel. The dataset includes reflection seismic, magnetic, and gravimetric measurements across multiple regions including the Scotia Plate, Antarctic Peninsula, and Ross Sea, totaling over 1,550 km of profiles in the first campaign and additional lines in subsequent areas. This research was conducted under the Italian National Research Program in Antarctica (PNRA) in cooperation with the United States Geological Survey.

Use Cases

• Modeling sub-surface geological structures based on reflection seismic profiles with detailed acquisition parameters.
• Analyzing magnetic anomalies to infer crustal composition and tectonic history of the Pacific Margin.
• Investigating gravimetric variations to understand density contrasts and deep crustal configuration.
• Studying the Hero Fracture Zone and Bransfield Strait geophysics using the specific survey lines and parameters described.

Strengths

• Contains data from two dedicated Antarctic summer campaigns (1989-90 and 1991-92) with explicit temporal coverage.
• Specifies detailed seismic acquisition parameters for different areas, including coverage percentages, streamer lengths, and air-gun volumes.
• Data collection involved cooperation with the United States Geological Survey (USGS) and used named research vessel and sensor equipment.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Last updated 1992-03-30; freshness should be verified for modern applications.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

Osservatorio Geofisico Sperimentale (OGS), under the Italian National Research Program in Antarctica (PNRA) coordinated by ENEA.

Collection Method

Marine geophysical survey using the Research Vessel OGS-Explora, collecting data with analog streamer, multichannel seismic recorder, gravimeter, and magnetometer.

Time Range

Antarctic summers 1989-1990 and 1991-1992.

Freshness

Last updated 1992-03-30 23:59:59.999000

Geography

Pacific Margin of the Antarctic Peninsula, Scotia Plate, South Pacific Ocean, Ross Sea, Hero Fracture Zone, Bransfield Strait, Southern Margin of the Scotia Arc.