Little Nahanni Aeromagnetic Survey: First Vertical Derivative of Magnetic Field

A map of the first vertical derivative of the magnetic field derived from an aeromagnetic survey flown over part of NTS 105-P in the Yukon. The survey was conducted by EON Geosciences Inc. between April 12 and June 2, 2010, using a cesium vapour magnetometer mounted on a Piper Navajo aircraft. The data were recorded with a nominal terrain clearance of 250 m, levelled, and interpolated to a 200 m grid.

Use Cases

• Geological mapping based on magnetic field derivatives to identify subsurface structures.
• Mineral exploration targeting based on magnetic anomalies mentioned in the survey description.
• Geophysical research using high-sensitivity (0.005 nT) magnetic data collected from a low-altitude (250 m) flight.
• Data integration for regional geological models based on the 200 m gridded data product.

Strengths

• Data was collected with a high-sensitivity instrument (0.005 nT) mounted on an aircraft.
• Flight parameters are specified, including a nominal terrain clearance of 250 m and traverse line spacing of 800 m.
• The data underwent a levelling process to minimize differences at line intersections before being interpolated to a 200 m grid.

Limitations

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

Provenance

Source

Government of Yukon, data acquired by EON Geosciences Inc.

Collection Method

Aeromagnetic survey using a split-beam cesium vapour magnetometer mounted on a Piper Navajo aircraft.

Time Range

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

Freshness

Last updated 2026-05-20 16:32:21.964851; freshness should be verified.

Geography

Little Nahanni area, part of NTS 105-P, Yukon, Canada.