Aerial Gamma Ray and Magnetic Survey Data for Alaska's National Petroleum Reserve

The National Petroleum Reserve in Alaska's North Slope is covered by aerial geophysical survey data from 1977. The U.S. Geological Survey collected radiometric and magnetic profiles at 1-second intervals from a helicopter flying approximately 800 feet above ground. This data is published as USGS Open-File Report 95-835.

Use Cases

• Map subsurface magnetic anomalies using residual total magnetic-field profile data for geological structure analysis.
• Identify radioactive mineral signatures from gamma ray radiometric profiles for resource assessment.
• Estimate depth-to-basement for regional geological modeling using the interpreted map provided.
• Analyze spatial correlation between magnetic and gamma ray data points recorded at 1-second intervals.

Strengths

• Data includes multiple map products: 5 index maps, 2 record location maps, 2 residual magnetic-field maps, and 1 depth-to-basement map.
• Aerial profiles were collected with specific operational parameters: 800-foot altitude and 100 mph average ground speed.

Limitations

• Data is from a single year (1977), making it temporally limited for change detection.
• The specific number of data rows, columns, and file size is unknown.

Provenance

Source

U.S. Geological Survey (USGS).

Collection Method

Aerial data recorded at 1-second intervals from a helicopter.

Time Range

1977

Freshness

1977

Geography

National Petroleum Reserve in Alaska (NPRA), North Slope, Alaska, USA.