USAC Airborne Magnetic and Gravity Survey Data for Antarctic Seas

Instituto Antartico Argentino Antarctic Data Base describes nearly 55,000 km of airborne magnetics and 20,000 km of gravity data. The data was collected by the USAC Program, a joint effort between the U.S., Argentina, and Chile, covering the Tierra del Fuego, Weddell, Bellingshausen, and Scotia Seas. Data availability is subject to agreement by the three countries.

Use Cases

• Modeling crustal thickness and geological structures based on gravity anomalies.
• Mapping magnetic anomalies to identify subsurface rock types and tectonic features.
• Conducting regional geophysical analysis for resource exploration in Antarctic seas.
• Integrating magnetic and gravity data for joint geophysical inversion studies.

Strengths

• Covers approximately 55,000 line-kilometers of airborne magnetic survey data.
• Includes approximately 20,000 line-kilometers of gravity survey data.
• Data originates from a multinational scientific program (USAC) involving the U.S., Argentina, and Chile.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data availability is subject to a tri-national agreement, which may restrict access.
• Last update date is unknown; freshness unverified.

Provenance

Source

Instituto Antartico Argentino Antarctic Data Base, collected via the USAC Program.

Collection Method

Airborne survey (magnetometry and gravimetry).

Time Range

null

Freshness

null

Geography

Tierra del Fuego, Weddell Sea, Bellingshausen Sea, Scotia Seas.