Aeromagnetic Survey First Vertical Derivative Map, Little Nahanni, Yukon

A geospatial map of the first vertical derivative of the magnetic field derived from an aeromagnetic survey flown between April 12 and June 2, 2010. Data were collected using a cesium vapour magnetometer from a Piper Navajo aircraft flying at a nominal 250-meter terrain clearance. The Government of Yukon produced this dataset, which was last updated on June 3, 2026.

Use Cases

• Geological mapping and structural analysis based on magnetic field gradients.
• Mineral exploration targeting using high-resolution aeromagnetic data.
• Geophysical research on crustal magnetism in northern Canada.
• Integrating magnetic data with other geospatial layers for regional studies.

Strengths

• Data collected with a high-sensitivity magnetometer (0.005 nT).
• Survey conducted with controlled flight parameters, including 250 m terrain clearance and 800 m traverse line spacing.
• Flight path was recovered using post-flight differential GPS corrections and video inspection.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The International Geomagnetic Reference Field (IGRF) was not removed from the magnetic field values.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Government of Yukon | Gouvernement du Yukon

Collection Method

Data acquired via airborne survey by EON Geosciences Inc. using a split-beam cesium vapour magnetometer, then levelled and gridded.

Time Range

Survey flown between April 12, 2010 and June 2, 2010.

Freshness

Last updated 2026-06-03 15:38:55.426149; freshness should be verified.

Geography

Little Nahanni Aeromagnetic Survey, Part of NTS 105-I (south half), Yukon, Canada.