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This airborne magnetic geophysical survey of the lower Yukon Delta, Alaska is in the St Michael, Kwiguk, and Black 1:250,000-scale USGS quadrangles on the Yukon River delta. Magnetic data were collected September 29 to November 20, 1995 by Aerodat. A total of 10,343.5 line kilometers were collected covering 7,402.9 square kilometers. Line spacing was 800 meters (m). Data were collected using a fixed wing aircraft with a median ground clearance of 90 m. [ABSTRACT FROM AUTHOR]

The Holitna airborne magnetic geophysical survey covers the Holitna basin, located in the Sleetemute and Lime Hills quadrangles surrounding the town of Stony River in southwest Alaska. Magnetic data were collected September 8th to October 7th 1997. A total of 13,658 line kilometers were collected covering 9,229.1 square kilometers. Line spacing was 800 meters (m). Data were collected using a fixed wing aircraft with a mean ground clearance of 90 m. PURPOSE These data were collected to assist the state in assessing the hydrocarbon potential of the Holitna basin area. The aeromagnetic data was intended to be interpreted and integrated with available geoscience data. SURVEY OVERVIEW DESCRIPTION This document provides an overview of the survey and includes text and figures of select primary and derivative products of this survey. A table of digital data packages available for download is provided to assist users in data selection. For reference, a catalog of the available maps is presented in reduced resolution. Please consult the metadata, project report, and digital data packages for more information and data. [ABSTRACT FROM AUTHOR]

The airborne magnetic geophysical survey of the Bethel Basin, Alaska is located in the Bethel, Baird Inlet, Russian Mission, and Marshall quadrangles near the town of Bethel in southwest Alaska. Magnetic data were collected during October 1996 by Sanders Geophysics Ltd. and August 1994 by GEONEX Aero Service and its subsidiaries. A total of 20,915 line kilometers were collected covering 14,953 square kilometers. Line spacing was 800 meters (m). Data were collected using a fixed-wing aircraft with a median ground clearance of 90 m. [ABSTRACT FROM AUTHOR]

The Stikine geophysical survey is located in southeast Alaska near the city of Wrangell, about 175 kilometers south of Juneau, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system from March to May 1997. A total of 8,097 line kilometers were collected covering 2,870.1 square kilometers. Line spacing was 400 meters (m). Data were collected approximately 30 m above the ground cover or tree canopy from a helicopter-towed sensor platform ("bird") on a 30-m-long line. The large trees and steep terrain resulted in an average ground clearance of 150 m. [ABSTRACT FROM AUTHOR]

The Southern NPRA electromagnetic and magnetic airborne geophysical survey is located in northwest Alaska in the southern National Petroleum Reserve-Alaska, about 320 kilometers south of the City of Utqiaġvik. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system from July to August 2005. A total of 11,115 line kilometers were collected covering 3,947.9 square kilometers. Line spacing was 400 meters (m) and 200 m over the Drenchwater area. Data were collected with an average ground clearance of 35 m from a helicopter towed sensor platform ("bird") on a 30-m-long line. [ABSTRACT FROM AUTHOR]

The Liberty Bell geophysical survey was originally flown in 2001 and published in 2002 (Alaska Division of Geological & Geophysical Surveys and others, 2002) as a part of the State of Alaska's Airborne Geophysical/Geological Mineral Inventory (AGGMI) program. This publication supersedes the previous publications to provide a compilation of published and unpublished information and includes standardized databases and product formats, upgrades digital datasets to modern formats, and re-releases the historical survey and associated documentation (http://doi.org/10.14509/29690). This publication contains geophysical data produced from airborne surveys flown from the 24th to 27th of August 2001 for 2,023.6 line kilometers at 400m line spacing in the Bonnifield mining district, Alaska. This DIGHEMV electromagnetic/magnetic survey was flown by Fugro Airborne Surveys Corp. under contract to Stevens Exploration Management Corp. [ABSTRACT FROM AUTHOR]

Maps for airborne geophysical survey of the Moran Survey Area in South-Central Melozitna Mining District, Central Alaska are presented, including one on the total magnetic field of the area, one on the coplanar apparent resistivity for 900 hertz (Hz) of the area, and one on recorded concentration units of thorium (Th).