Tanana River and Big Delta Geophysical Survey

The Tanana River and Big Delta airborne magnetic and radiometric geophysical survey covers parts of the Big Delta, Charley River, Circle, Eagle, Fairbanks, Kantishna River, Livengood, Mount Hayes, and Tanacross quadrangles near Fairbanks and Delta Junction, Alaska. Magnetic and radiometric data were collected with a fixed-wing aircraft from May 14 to August 4, 2022, by MPX Geophysics LTD. The survey contains six individual blocks. A total of 97,386 line kilometers were collected. The six blocks total 33,095 km2; they cover 32,944 km2 due to overlap. The magnetometer was mounted to a rear-facing fixed boom (tail stinger). The radiometric crystals were located in the cabin of the aircraft. The Tanana, Chena, Healy, Eisen, and North Pole blocks were flown with a line spacing of 400 meters (m). Mean ground clearances were: Tanana, 188 m; Chena, 352 m; Healy, 295 m; Eisen, 430 m; North Pole, 180 m. The Eisen Infill block was flown with a line spacing of 200 m and a mean ground clearance of 422 m. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30899.

Publications

• Emond, A.M. and Twelker, Evan, 2022. DGGS's completed Yukon-Tanana Upland Earth MRI airborne geophysics program and CY 2023 Mag, Rad, and EM acquisition plans (presentation): Alaska Miners Association Annual Meeting, Anchorage, Alaska, November 8-10, 2022. Maps, figures, text, web services, and web apps published in this series have not necessarily undergone technical peer review and should not be used or cited as reviewed data. Future reviewed publications incorporating these data may or may not change the interpretations presented.
• GPR 2022-1. Tanana River and Big Delta airborne magnetic and radiometric survey.