Joseph S. Duval 2001 CD-ROM U.S. Geological Survey Open-File Report 01-128 Reston, Virginia U.S. Geological Survey http://pubs.usgs.gov/of/of01-128/ Data generated by aerial sensing of radiation emanating from the earth's surface in Alaska provides general estimates of the geographic distribution of Uranium, Thorium, and Potassium in surficial and bedrock units throughout this area. The grids were re-projected and geotiff images created for distribution using internet map services. -174 -116 72 54 2002 available when data upgraded complete none none none radiometric, uranium, potassium, thorium ISO 19115 Topic Categories geoscientificInformation none Alaska Robert P. Kucks U.S. Geological Survey Operational Geologist mailing address

Box 25046, MS 964 Denver Federal Center

Denver CO 80225 USA (303)236-1405 rkucks@usgs.gov http://pubs.usgs.gov/of/of01-128/AKccm.jpg Gamma-ray composite-color map that combines the uranium, potassium, and thorium data as shades of red, green, and blue, respectively, 555x453 pixels, 78k bytes. JPEG Saltus, Richard W. Riggle, Frederic E. Clark, Brian T. Hill, Patricia L. 1999 only remote-sensing image U.S. Geological Survey Open-File Report 99-16 Denver U.S. Geological Survey An earlier release of generally the same raw data with modified resultant products. http://pubs.usgs.gov/of/1999/ofr-99-0016/ Joseph S. Duval 2001 CD-ROM U.S. Geological Survey Open-File Report 01-128 Reston, Virginia U.S. Geological Survey http://pubs.usgs.gov/of/of01-128/ CD-ROM 2001 publication date USGS OF 01-128 contains all grids and Geosoft/Oasis maps needed for processing Reprojected original grids to Spacial Data project specifications Input Geosoft/Oasis map files from USGS OFR 01-128 to create color scales from original images Create ArcView geotiff files from new maps in Geosoft/Oasis using above input USGS OF 01-128 20020610 Robert P. Kucks U.S. Geological Survey Operational Geologist mailing

Box 25046, MS 964 Denver Federal Center

Denver CO 80225 USA (303)236-1405 rkucks@usgs.gov AKfltlin.gdb - this database contains flight-line data for the aerial surveys. After completion of all corrections, grids of the various data channels were calculated using a minimum curvature algorithm and a grid cell of 5 km. Merged aeromagnetic anomaly data are provided in AKMagMrg.GRD. Gridded gamma-ray emission data are provided for Potassium (kfilt.grd), Thorium (thfilt.grd), and Uranium (ufilt.grd). http://pubs.usgs.gov/of/2001/of01-128/Database.htm Peter N Schweitzer USGS ER MW GD Geologist mailing address

12201 Sunrise Valley Drive$Mail Stop 954

Reston VA 20192-0002 USA 703-648-6533 703-648-6252 pschweitzer@usgs.gov USGS Open-File Report 01-128 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic Code). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Geosoft database (.gdb) Flight-line gamma-ray observations 1000 megabytes http://pubs.usgs.gov/of/2001/of01-128/Data/GDB/AKfltlin.gdb Geosoft grid (.grd) Gridded data in .grd file, georeference information in .grd.gi file by the same name Gridded geophysical parameters http://pubs.usgs.gov/of/2001/of01-128/Data/GRD/AKMagMrg.GRD http://pubs.usgs.gov/of/2001/of01-128/Data/GRD/kfilt.grd http://pubs.usgs.gov/of/2001/of01-128/Data/GRD/thfilt.grd http://pubs.usgs.gov/of/2001/of01-128/Data/GRD/tcfilt.grd http://pubs.usgs.gov/of/2001/of01-128/Data/GRD/ufilt.grd none 20091124 Robert P. Kucks U.S. Geological Survey Operational Geologist mailing

Box 25046, MS 964 Denver Federal Center

Denver CO 80225 USA (303)236-1405 rkucks@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998