Merged grids of residual magnetic intensity, digital terrain model, and apparent resistivity compiled from the Tanacross, Ladue, Western Fortymile, and Fortymile geophysical surveys. The grids were compiled by Benjamin Drenth (USGS). The data, as well as additional metadata, are available from the Alaska Division of Geological & Geophysical Surveys website: http://dggs.alaska.gov/pubs/id/29555

Merged grids of residual magnetic intensity and apparent resistivity compiled from the Wrangellia, Iron Creek, Southern Delta River, Valdez Creek, and Nikolai geophysical surveys.

Merged grids of residual magnetic intensity and apparent resistivity compiled from the Beaver Creek, Fox Hills, Southern Dishna River, Aniak, Sleetmute, Iditarod geophysical surveys.

Merged grids of residual magnetic intensity and apparent resistivity compiled from the East Styx, Farewell, Middle Styx, and Styx River geophysical surveys.

Merged grids of residual magnetic intensity, digital terrain model, and apparent resistivity compiled from the Black Mountain, Liscum, Goodpaster, SE extension of Salcha River - Pogo, and Salcha River Pogo geophysical surveys.

Merged grids of residual magnetic intensity and apparent resistivity compiled from the Northeast Fairbanks, Fairbanks, Headwaters of the Little Chena, and Circle geophysical surveys.

This magnetic anomaly map of Alaska provides a statewide view of magnetic anomalies in Alaska. This composite magnetic anomaly grid is a merge of the available, public-domain, digital, magnetic surveys for the state of Alaska as of 2015. The grid was compiled by Richard Saltus (USGS). The data, as well as additional metadata, are available from the Alaska Division of Geological & Geophysical Surveys website: http://dggs.alaska.gov/pubs/id/29555

A rich legacy of geochemical data produced since the early 1960s covers the great expanse of Alaska; careful treatment of such data may provide significant and revealing geochemical maps that may be used for landscape geochemistry, mineral resource exploration, and geoenvironmental investigations over large areas. To maximize the spatial density and extent of data coverage for statewide mapping of element distributions, we compiled and integrated analyses of more than 175,000 sediment and soil samples from three major, separate sources: the U.S. Geological Survey, the National Uranium Resource Evaluation program, and the Alaska Division of Geological & Geophysical Surveys geochemical databases. Various types of heterogeneity and deficiencies in these data presented major challenges to our development of coherently integrated datasets for modeling and mapping of element distributions. Researchers from many different organizations and disparate scientific studies collected samples that were analyzed using highly variable methods throughout a time period of more than 50 years, during which many changes in analytical techniques were developed and applied. Despite these challenges, the U.S. Geological Survey has produced a new systematically integrated compilation of sediment and soil geochemical data with an average sample site density of approximately 1 locality per 10 square kilometers (km2) for the entire State of Alaska, although density varies considerably among different areas. From that compilation, we have modeled and mapped the distributions of 68 elements, thus creating an updated geochemical atlas for the State.