Middle Styx survey area: Airborne magnetic, electromagnetic, and radiometric data in line (point), grid, vector, and map formats, Lime Hills and Tyonek quadrangles, southcentral Alaska

This digital publication, GPR 2013-2, contains data produced from airborne geophysical surveys conducted in 2012 for the Middle Styx survey area in the McGrath and Yentna mining districts, Lime Hills and Tyonek quadrangles, southcentral Alaska. Aeromagnetic, electromagnetic (EM), and radiometric data were acquired by helicopter for about 138 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2013-2 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines.