Koyukuk Geophysical Survey

The Koyukuk geophysical survey is located in interior Alaska in the Koyukuk mining district, about 300 kilometers north of Fairbanks, Alaska. Frequency domain electromagnetic and magnetic data were collected with the SIGHEM-5 system from August to October 1997. A total of 4223.4 line kilometers were collected covering 533 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 gpr2020_009_koyukuk_1997_vector_data	Vector data	26.2 M	Read me
Download gpr2020_009_koyukuk_1997_databases_geosoft	Linedata Geosoft format database	154.5 M	Read me
Download gpr2020_009_koyukuk_1997_images_registered	Image files	3.6 M	Read me
Download gpr2020_009_koyukuk_1997_grids_geosoft	Gridded data Geosoft format	34.6 M	Read me
Download gpr2020_009_koyukuk_1997_grids_ermapper	Gridded data ER Mapper	35.7 M	Read me
Download gpr2020_009_koyukuk_1997_kmz	Google Earth files	49.6 M	Read me
Download gpr2020_009_koyukuk_1997_documents	Adobe PDF files	6.8 M	Read me
Download gpr2020_009_koyukuk_1997_maps_pdf_format	Adobe PDF files	2.1 G	Read me
Download gpr2020_009_koyukuk_1997_ascii_data	ASCII tabular files	100.3 M	Read me

Publications

GPR 2020-9. Koyukuk electromagnetic and magnetic airborne geophysical survey data compilation.
RI 98-10. 4200 Hz coplanar resistivity contours for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-23. CD-ROM containing gridded files and section lines of 1997 geophysical survey data for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
RI 98-8. Total field magnetics for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-19. Flight line path of the 1997 geophysical survey for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-20. Total field magnetics and electromagnetic anomalies for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (clear diazo film version).
PDF 98-21. 900 Hz coplanar resistivity contours for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-22. 4200 Hz coplanar resistivity contours for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-25. Project report of the airborne geophysical survey for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-26. Portfolio of aeromagnetic and resistivity maps of the northeastern portion of the Koyukuk mining district.
PDF 98-40A. Total field magnetics and detailed electromagnetic anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (parts of the Wiseman A-1, A-2, and B-1 quadrangles).
PDF 98-40B. Total field magnetics and electromagnetic anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (parts of the Wiseman B-1 and C-1 quadrangles).
PDF 98-40C. Total field magnetics and detailed electromagnetic anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (parts of the Wiseman A-1, B-1, and Chandalar A-6 and B-6 quadrangles).
PDF 98-40D. Total field magnetics and detailed electromagnetic anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (parts of the Chandalar C-5 and C-6 quadrangles).
PDF 98-40E. Total field magnetics and detailed electromagnetics anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska (parts of the Chandalar C-5 and C-6 quadrangles).
RI 98-7. Total field magnetics and electromagnetic anomalies of the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
RI 98-9. 900 Hz coplanar resistivity contours for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.
PDF 98-24. CD-ROM digital archive files of 1997 survey data for the northeastern portion of the Koyukuk mining district, eastern Brooks Range, Alaska.