Aerial Gamma-Ray Surveys in Alaska

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Joseph S. Duval
Publication_Date: 2001
Title: Aerial Gamma-Ray Surveys in Alaska
Geospatial_Data_Presentation_Form: CD-ROM
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 01-128
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2001/of01-128/
Description:
Abstract:
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.
Purpose:
The grids were re-projected and geotiff images created for distribution using internet map services.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -174
East_Bounding_Coordinate: -116
North_Bounding_Coordinate: 72
South_Bounding_Coordinate: 54
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Currentness_Reference: available
Status:
Maintenance_and_Update_Frequency: when data upgraded
Progress: complete
Access_Constraints: none
Use_Constraints: none
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: radiometric, uranium, potassium, thorium
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Alaska
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Robert P. Kucks
Contact_Organization: U.S. Geological Survey
Contact_Position: Operational Geologist
Contact_Address:
Address_Type: mailing address
Address:
Box 25046, MS 964
Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: (303)236-1405
Contact_Electronic_Mail_Address: rkucks@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: https://pubs.usgs.gov/of/2001/of01-128/AKccm.jpg
Browse_Graphic_File_Description:
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.
Browse_Graphic_File_Type: JPEG
Cross_Reference:
Citation_Information:
Originator: Saltus, Richard W.
Originator: Riggle, Frederic E.
Originator: Clark, Brian T.
Originator: Hill, Patricia L.
Publication_Date: 1999
Title:
Merged aeroradiometric data for Alaska: A website for distribution of gridded data and plot files
Edition: only
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 99-16
Publication_Information:
Publication_Place: Denver
Publisher: U.S. Geological Survey
Other_Citation_Details:
An earlier release of generally the same raw data with modified resultant products.
Online_Linkage: https://pubs.usgs.gov/of/1999/ofr-99-0016/
Data_Quality_Information:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Joseph S. Duval
Publication_Date: 2001
Title: Aerial Gamma-Ray Surveys in Alaska
Geospatial_Data_Presentation_Form: CD-ROM
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 01-128
Publication_Information:
Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/2001/of01-128/
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2001
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: USGS OF 01-128
Source_Contribution: contains all grids and Geosoft/Oasis maps needed for processing
Process_Step:
Process_Description:
Reprojected original grids to Spatial 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
Source_Used_Citation_Abbreviation: USGS OF 01-128
Process_Date: 20020610
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Robert P. Kucks
Contact_Organization: U.S. Geological Survey
Contact_Position: Operational Geologist
Contact_Address:
Address_Type: mailing
Address:
Box 25046, MS 964
Denver Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone: (303)236-1405
Contact_Electronic_Mail_Address: rkucks@usgs.gov
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
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).
Entity_and_Attribute_Detail_Citation: https://pubs.usgs.gov/of/2001/of01-128/Database.htm
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: USGS ER MW GD
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive$Mail Stop 954
City: Reston
State_or_Province: VA
Postal_Code: 20192-0002
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Resource_Description: USGS Open-File Report 01-128
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Geosoft database (.gdb)
Format_Information_Content: Flight-line gamma-ray observations
Transfer_Size: 1000
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Geosoft grid (.grd)
Format_Specification:
Gridded data in .grd file, georeference information in .grd.gi file by the same name
Format_Information_Content: Gridded geophysical parameters
Digital_Transfer_Option:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20160607
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: USGS Eastern Mineral and Environmental Resources Science Center
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address: 12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192-0002
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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