Detailed aeromagnetic surveying in Minnesota

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Abstract

The Minnesota Geological Survey has initiated a detailed aeromagnetic survey over a five-county block of northeastern Minnesota that includes the region east of 93°W and north of 46°N. The current survey is being conducted at a mean ground clearance of 150 m with a 400-m line spacing, and it will include approximately 60,000 line miles of data.

This project, which is entirely funded by the state of Minnesota, represents the first step in a long-term geophysics program that will involve acquisition of detailed aeromagnetic data over extensive regions of the state. The Minnesota Geological Survey plans to use the aeromagnetic data primarily in geologic mapping of the Precambrian bedrock.

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