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Airborne electromagnetic and magnetic survey data, northeast Wisconsin (ver. 1.1, June 2022)

June 30, 2022

Airborne electromagnetic (AEM) and magnetic survey data were collected during January and February 2021 over a distance of 3,170 line kilometers in northeast Wisconsin. These data were collected in support of an effort to improve estimates of depth to bedrock through a collaborative project between the U.S. Geological Survey (USGS), Wisconsin Department of Agriculture, Trade, and Consumer Protection (DATCP), and Wisconsin Geological and Natural History Survey (WGNHS). Data were acquired by SkyTEM Canada Inc. with the SkyTEM 304M time-domain helicopter-borne electromagnetic system together with a Geometrics G822A cesium vapor magnetometer. The survey was acquired at a nominal flight height of 30 - 40 m above terrain along parallel flight lines oriented northwest-southeast with nominal line spacing of 0.5 miles (800 m). AEM data were inverted to produce models of electrical resistivity along flight paths, with typical depth of investigation up to about 300 m and 1 - 2 m near-surface resolution. Shallow resistivity transitions were used to estimate depth to bedrock across the survey area.

Publication Year 2022
Title Airborne electromagnetic and magnetic survey data, northeast Wisconsin (ver. 1.1, June 2022)
DOI 10.5066/P93SY9LI
Authors Burke J Minsley, Benjamin Bloss, David J Hart, William Fitzpatrick, Maureen A. Muldoon, Esther K. Stewart, Randall J Hunt, Stephanie R James, Nathan L Foks, Matthew J Komiskey
Product Type Data Release
Record Source USGS Digital Object Identifier Catalog
USGS Organization Geology, Geophysics, and Geochemistry Science Center