Nyac Geophysical Survey

This geophysical survey is located in southwestern Alaska in the Nyac mining district near Bethel, about 520 kilometers west of Anchorage, Alaska. The data for this magnetic-only survey were collected from August to September 1993. A total of 1366 line kilometers were collected covering 502 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 gpr2019_004_nyac_vector_data	Vector data	10.3 M	Read me
Download gpr2019_004_nyac_maps_prn_format	Plot files	3.8 M	Read me
Download gpr2019_004_nyac_databases_geosoft	Linedata Geosoft format database	3.0 M	Read me
Download gpr2019_004_nyac_images_registered	Image files	1.4 M	Read me
Download gpr2019_004_nyac_grids_geosoft	Gridded data Geosoft format	9.5 M	Read me
Download gpr2019_004_nyac_grids_ermapper	Gridded data ER Mapper	9.4 M	Read me
Download gpr2019_004_nyac_kmz	Google Earth files	9.0 M	Read me
Download gpr2019_004_nyac_documents	Adobe PDF files	12.3 M	Read me
Download gpr2019_004_nyac_maps_pdf_format	Adobe PDF files	21.2 M	Read me
Download gpr2019_004_nyac_profiles_stacked	Adobe PDF files	4.3 M	Read me
Download gpr2019_004_nyac_ascii_data	ASCII tabular files	3.9 M	Read me

Publications

GPR 2019-4. Nyac magnetic airborne geophysical survey data compilation. Supersedes GPR 2004-4, GPR 2004-4-1A, GPR 2004-4-1B, PDF 94-15, PDF 94-16, PDF 94-17, PDF 94-18, PDF 94-34, PDF 94-36, and RI 94-3.
GPR 2004-4. Line, gridded, and vector data, and selected plot files from the aeromagnetic survey of the Nyac mining district, central Alaska.
PDF 94-34. Digital gridded data of total field magnetics for entire survey of Nyac mining district.
PDF 94-16. Flight lines of Nyac mining district.
PDF 94-17. Filtered total field VLF contours of Nyac mining district.
PDF 94-18. Clear mylar version of RI 94-3: Total field magnetics of the Nyac mining district.
PDF 94-36. Final summary of 1993 airborne geophysical surveys of the Nome, Circle, Nyac, and Valdez Creek areas. The data and maps for this publication were initially released as a compilation of several distinct geophysical surveys. The maps and digital data have subsequently been divided into the original acquisition areas: Nome, GPR 2019-11; Circle, GPR 2019-3; Nyac, GPR 2019-4; and Valdez Creek, GPR 2019-5.
RI 94-3. Total field magnetics of the Nyac mining district.
PDF 94-15. CD-ROM digital archive files of 1993 survey data for Nome, Circle, Nyac, and Valdez Creek mining districts. The data and maps for this publication were initially released as a compilation of several distinct geophysical surveys. The maps and digital data have subsequently been divided into the original acquisition areas: Nome, GPR 2019-11; Circle, GPR 2019-3; Nyac, GPR 2019-4; and Valdez Creek, GPR 2019-5.