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Circle Geophysical Survey

This geophysical survey is located in north-central Alaska in the Circle mining district, about 120 kilometers northeast of Fairbanks, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEM system from August to September 1993. A total of 2516.7 line kilometers were collected covering 921.5 square kilometers. Line spacing was 400 meters (m). Data were collected 30 m above the ground surface from a helicopter towed sensor platform ("bird") on a 30 m long line.

Available Data Metadata Overview
File Name Data File Format File Size Info
Download circle_vector_data Vector data 149.1 M Read me
Download circle_maps_prn_format Plot files 27.1 M Read me
Download circle_databases_geosoft Linedata Geosoft format database 21.1 M Read me
Download circle_images_registered Image files 30.1 M Read me
Download circle_grids_geosoft Gridded data Geosoft format 3.0 M Read me
Download circle_grids_ermapper Gridded data ER Mapper 4.3 M Read me
Download circle_kmz Google Earth files 25.1 M Read me
Download circle_documents Adobe PDF files 12.4 M Read me
Download circle_maps_pdf_format Adobe PDF files 49.1 M Read me
Download circle_profiles_stacked Adobe PDF files 17.8 M Read me
Download circle_ascii_data ASCII tabular files 106.2 M Read me


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