First Vertical Derivative of the Magnetic Field, Eagle Plains Yukon 2009

Aeromagnetic survey data from the Eagle Plains region of Yukon, Canada, collected between April 10 and September 16, 2009. The data were recorded using cesium vapour magnetometers from aircraft flying at a nominal 250-meter terrain clearance and were interpolated to a 200-meter grid. The Government of Yukon published this dataset, which represents the first vertical derivative of the magnetic field without removal of the International Geomagnetic Reference Field.

Use Cases

• Geological mapping and structural interpretation based on magnetic field gradients.
• Mineral exploration targeting by identifying subsurface magnetic anomalies.
• Integrating magnetic data with other geophysical surveys for regional geological models.
• Studying the effects of survey parameters like flight line spacing and terrain clearance on data quality.

Strengths

• Data collection used high-sensitivity cesium vapour magnetometers with a sensitivity of 0.005 nT.
• Flight parameters are precisely documented, including 800 m traverse line spacing, 2400 m control line spacing, and 250 m nominal terrain clearance.
• Data underwent post-flight processing including differential GPS correction and mutual levelling of flight-line intersections.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The International Geomagnetic Reference Field (IGRF) was not removed, which may complicate direct geological interpretation.
• Row count and file size are unknown, which may limit suitability assessment.

Provenance

Source

Government of Yukon | Gouvernement du Yukon

Collection Method

Data acquired via airborne survey using split-beam cesium vapour magnetometers mounted on aircraft, followed by post-flight differential GPS correction and gridding.

Time Range

2009-04-10 to 2009-09-16

Freshness

Last updated 2026-05-20 15:32:00.763588; freshness should be verified.

Geography

Eagle Plains region, NTS 116 H (north half), Yukon, Canada