Canada - Radiometric survey data compilation

The data presented in the radioactivity map of Canada series (Buckle et al., 2014) depict the surface concentrations of three naturally-occurring radioactive elements: potassium (K, %), equivalent uranium (eU, ppm), and equivalent thorium (eTh, ppm); as well as five derived products: natural air absorbed dose rate (NADR, nGy/h) calculated from a linear combination of potassium, equivalent uranium, and equivalent thorium concetrations; the ratios eU/eTh, eU/K, and eTh/K; and the ternary map which uses false colour to illustrate the co-variation of the three measured elements (Broome et al., 1987). This compilation was produced with data from more than 370 airborne gamma-ray surveys flown or supervised by the Geological Survey of Canada between 1969 and 2011. Data was calibrated and acquired in accordance to standards in effect at the time each survey (see Darnley et al., 1975 and IAEA, 1991). Most of the data was acquired using 50 L of Sodium Iodide (NaI) detectors flown at a nominal terrain clearance of 120 m, but line spacings vary from 5000 m to 200 m depending on the specific survey. Potassium is measured directly from the 1460 keV gamma-ray photons emitted by Potassium-40. Uranium and thorium, however, are determined indirectly from gamma-ray photons emitted by daughter products Bismuth-214 (1765 keV) and Thallium-208 (2614 keV) respectively assuming equilibrium between daughter and parent isotopes. For this reason, gamma-ray spectrometric measurements of uranium and thorium are referred to as equivalent uranium (eU) and equivalent thorium (eTh). The measured gamma-rays originate from geological materials in the upper 30 cm of the Earth's surface and their intensity are directly related to the concentrations of K, U and Th in the rocks and minerals present. The geochemical information presented in this compilation is used to support bedrock and surficial geology mapping by outlining lithological variations. It can also indicate mineralization either by association of radio-elements as trace elements with economic minerals or through delineation of their enrichment or depletion due to geochemical alteration resulting from mineralization processes. Overall, this information also contributes to the characterization of the natural radiation environment. Futher information on data acquisition, processing and interpretation and on application can be found in IAEA-TECDOC-1363 (2003), and references therein. These data were also published as Geological Survey of Canada maps, in the Open Files series (7396-7403). References Broome, J., J.M. Carson, J.A. Grant, and K.L. Ford, 1987. A modified ternary radioelement mapping technique and its application to the south coast of Newfoundland, Geological Survey of Canada, Paper 87-14. https://doi.org/10.4095/122382 Buckle, J.L., J.M. Carson, K.L. Ford, R. Fortin and W.F. Miles, 2014, Radioactivity map of Canada, ternary radioelement map, Geological Survey of Canada, Open File 7397. https://doi.org/10.4095/293354 Darnley, A.G., E. M. Cameron and K. A. Richardson, 1975. The Federal-Provincial Uranium Reconnaissance Program, in Geological Survey of Canada, Paper 75-26, p. 49-71. https://doi.org/10.4095/102591 International Atomic Energy Agency, 1991. Airborne Gamma Ray Spectrometer Surveying, International Atomic Energy Agency, Technical Reports Series No. 323. https://www.iaea.org/publications/1427/airborne-gamma-ray-spectrometer-surveying International Atomic Energy Agency, 2003. Guidelines for radioelement mapping using gamma ray spectrometry data; International Atomic Energy Agency, Technical Reports Series No. 1363. https://www.iaea.org/publications/6746/guidelines-for-radioelement-mapping-using-gamma-ray-spectrometry-data

Date ( RI_367 ): 2017-05-23

Date ( RI_366 ): 2017-05-23

RI_415

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Richard Fortin ( Geophysicist )

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 947-4129
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_413

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_409

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_418

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Douglas Oneschuk ( Physical Scientist )

601 Booth Street , Ottawa , Ontario , Canada

voice; +1 (613) 947-3337
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_414

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Presentation form: tableDigital; tableNumérique RI_397

Name: Data

Purpose: Radiometric measurements reflect radiological properties of the surficial geology and bedrock. They provide qualitative and quantitative information used in geological mapping. Understanding the geology assists in mineral exploration activities and provide useful information necessary for communities, aboriginal associations, and government to make land use decisions. This information is also important component to the response management to incidents involving radionuclide release.

Status: completed; complété RI_593

RI_412

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

Maintenance and update frequency: asNeeded; auBesoin RI_540

GSC Keywords Vocabulary - Thesaurus Thésaurus - vocabulaire de mots-clé de la CGC ( RI_528 )

Geophysics, general
Geophysics

NRCan - GSC - Geophysics - Keywords list Liste de mots-clés - RNCan - CGC - Géophysique ( RI_528 )

Radioactivity

Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )

Earth sciences
Geophysics

Use limitation: No constraint

Use limitation: Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)

Access constraints: license; licence RI_606

Use constraints: otherRestrictions; autresRestrictions RI_609

Spatial representation type: grid; grille RI_636

Distance: 200.00 http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#metre

Metadata language: eng; CAN

Metadata language: fra; CAN

Character set: utf8; utf8 RI_458

Topic category

Geoscientific information

Description: Canada

Begin date: 1968-12-31

End date: 2011-12-30

Reference system identifier: http://www.epsg-registry.org/ / EPSG: 3978 / 6.14

Spatial representation info

No information provided.

Distribution format

GRD ( not applicable )

RI_412

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada - Geophysics Data Center

601 Booth Street , Ottawa , Ontario , Canada

voice; 1 (613) 995-5326
http://gdr.agg.nrcan.gc.ca/gdrdap/dap/search-eng.php

RI_414

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Transfer size: 1000

OnLine resource: Equivalent Uranium - Potassium radioactivity, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Equivalent Uranium - Potassium radioactivity, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Equivalent Uranium - equivalent Thorium radioactivity, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Equivalent Uranium - equivalent Thorium radioactivity, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Equivalent Thorium radioactivity, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Equivalent Thorium radioactivity, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Radioactivité due à l'équivalent Thorium et au Potassium, Canada (grille 250 m) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Radioactivité due à l'équivalent Thorium et au Potassium, Canada (grille 250 m) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Radioactivity map of Canada, potassium (Open File 7403) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, potassium (Open File 7403) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, natural air absorbed dose rate (Open File 7396) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, natural air absorbed dose rate (Open File 7396) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, ternary radioelement map (Open File 7397) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, ternary radioelement map (Open File 7397) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, thorium (Open File 7401) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, thorium (Open File 7401) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, thorium/potassium (Open File 7398) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, thorium/potassium (Open File 7398) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, uranium (Open File 7402) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, uranium (Open File 7402) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, uranium/potassium (Open File 7399) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, uranium/potassium (Open File 7399) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Radioactivity map of Canada, uranium/thorium (Open File 7400) - English ( HTTPS )
Supporting Document;PDF;eng

OnLine resource: Radioactivity map of Canada, uranium/thorium (Open File 7400) - French ( HTTPS )
Supporting Document;PDF;fra

OnLine resource: Equivalent Uranium radioactivity, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Equivalent Uranium radioactivity, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Natural Air Absorbed Radioactivity Dose Rate, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Natural Air Absorbed Radioactivity Dose Rate, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Potassium radioactivity, Canada (250 m grid) - French ( HTTP )
Dataset;ZIP;fra

OnLine resource: Potassium radioactivity, Canada (250 m grid) - English ( HTTP )
Dataset;ZIP;eng

OnLine resource: Web map service - English ( HTTP )
Dataset;WMS;eng

OnLine resource: Web map service - French ( HTTP )
Dataset;WMS;fra

Hierarchy level: dataset; jeuDonnées RI_622

Statement: Compilation of all survey data and grid generation

Description: 1) Generate grids from point data

2) Merge the grids together

3) Any additional (new) grids are merged into the original grid as needed

4) Convert grids to HGD files, upload them to the DAP server and register them on the DAP