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Open-File Report 2012–1060

Alaska Geochemical Database—Mineral Exploration Tool for the 21st Century—PDF of Presentation

By Matthew Granitto, Jeanine M. Schmidt, Keith A. Labay, Nora B. Shew, and Bruce M. Gamble

Thumbnail of and link to report PDF (3.27 MB)Abstract

The U.S. Geological Survey has created a geochemical database of geologic material samples collected in Alaska. This database is readily accessible to anyone with access to the Internet. Designed as a tool for mineral or environmental assessment, land management, or mineral exploration, the initial version of the Alaska Geochemical Database—U.S. Geological Survey Data Series 637—contains geochemical, geologic, and geospatial data for 264,158 samples collected from 1962–2009: 108,909 rock samples; 92,701 sediment samples; 48,209 heavy-mineral-concentrate samples; 6,869 soil samples; and 7,470 mineral samples. In addition, the Alaska Geochemical Database contains mineralogic data for 18,138 nonmagnetic-fraction heavy mineral concentrates, making it the first U.S. Geological Survey database of this scope that contains both geochemical and mineralogic data. Examples from the Alaska Range will illustrate potential uses of the Alaska Geochemical Database in mineral exploration.

Data from the Alaska Geochemical Database have been extensively checked for accuracy of sample media description, sample site location, and analytical method using U.S. Geological Survey sample-submittal archives and U.S. Geological Survey publications (plus field notebooks and sample site compilation base maps from the Alaska Technical Data Unit in Anchorage, Alaska). The database is also the repository for nearly all previously released U.S. Geological Survey Alaska geochemical datasets. Although the Alaska Geochemical Database is a fully relational database in Microsoft® Access 2003 and 2010 formats, these same data are also provided as a series of spreadsheet files in Microsoft® Excel 2003 and 2010 formats, and as ASCII text files. A DVD version of the Alaska Geochemical Database was released in October 2011, as U.S. Geological Survey Data Series 637, and data downloads are available at Also, all Alaska Geochemical Database data have been incorporated into the interactive U.S. Geological Survey Mineral Resource Data web portal, available at

First posted April 11, 2012

For additional information contact:
USGS Central Mineral and Environmental Resources Science Center
Box 25046, MS-973
Denver Federal Center
Denver, CO 80225

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Suggested citation:

Granitto, Matthew, Schmidt, J.M., Labay, K.A., Shew, N.B., and Gamble, B.M., 2012, Alaska Geochemical Database—Mineral Exploration Tool for the 21st Century—PDF of presentation: U.S. Geological Survey Open-File Report 2012–1060, 33 p.






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