The Compilation and Application of Aeromagnetic Data for Hydrocarbon Exploration in Interior Alaska
John F. Meyer, Jr., Louis J. Racic, Richard W. Saltus, 1998. "The Compilation and Application of Aeromagnetic Data for Hydrocarbon Exploration in Interior Alaska", Geologic Applications of Gravity and Magnetics: Case Histories, Richard I. Gibson, Patrick S. Millegan
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To stimulate interest and provide background information for future petroleum and mineral exploration in interior Alaska, the state of Alaska, Division of Oil and Gas, and the U.S. Geological Survey joined in a cooperative effort to compile and merge all of the publicly available magnetic data throughout interior Alaska. Interior Alaska extends from the Brooks Range in the north to the Alaska Range in the south and from the Peninsula on the west to the Alaska-Canadian border. Budget and time constraints restricted the initial compilation to the area of state-controlled lands within the Alaskan interior, extending from 61°N to 66°N and 144°W to 159°W (Figure 1). The primary sedimentary basins within this area consist of the Copper River Basin, Susitna Basin, Minchumina Basin, Holitna Basin, and Middle Tanana Basin (Kirschner, 1994).
The data processing was performed by Paterson, Grant & Watson Ltd. of Toronto, Ontario, under contract to the state of Alaska. Aeromagnetic maps at a scale of 1:500,000 have been published jointly by the U.S. Geological Survey and the state of Alaska, Division of Oil and Gas (Meyer and Saltus, 1995). In this study, twenty-three magnetic surveys, comprising 280 000 line-kilometers, flown between 1954 and 1982, were merged to produce two digital data grids. The first grid, referred to as the composite grid (Figure 2), was produced to retain the closest resolution to the original data for each survey and was designed to be used for detailed modeling and local depth-to-basement determinations. The second grid, referred to as the merged grid