| - General - |
| Geofile: | NFLD/3393 |
| Companies: | Geological Survey of Canada; Geological Survey of Newfoundland and Labrador (compilers) |
| Contractor: | (various) |
| Survey Area: | Airborne Compilation: West-Central Newfoundland |
| NTS Areas: | parts of NTS 01M, 02D, 11O, 11P, 12A and 12B |
|
| - Survey Logistics - |
| Survey Date: | NA |
| Block: | West-Central Nfld. |
| Survey Extent: | The area includes most of western and central Newfoundland. |
| Altitude: | (various) |
| Line Spacing: | (various) |
| Positioning: | NA |
| Instrumentation: | NA |
| Data Recorded: | Eight (8) 1:240K maps and merged data layers: Mag (4): Residual Total Field; First Vertical Derivative; Tilt Derivative; Analytic Signal; and Rad (4): K; U; Th; Total Count |
| Comments: | Digital magnetic and radiometric data from adjacent, and often overlapping, high-resolution surveys flown by mineral exploration companies within western and central Newfoundland were mutually levelled and merged in this compilation (see survey index, located on the margin of each PDF map). The composite magnetic results were subsequently merged with regional aeromagnetic data, available from the Geological Survey of Canada’s Geophysical Data Repository. |
|
| - Digital Data - |
| Confidentiality Date: | April 16, 2021 |
| Grid Cell Size: | 25 m |
| Projection of Data: | NAD83, UTM Zone 21 |
| Data Comments: | Digital data (below) and 1:250K scale maps showing the results of this TGI project have been released April 16, 2021.
Links to PDF maps:
1:200K scale Maps
|
| Links to Data: |
| Merged Geosoft grid: Residual Mag (399 Mb zip'd) |
| Merged Geosoft grid: Mag, First Vertical Derivative (1VD) (416 Mb zip'd) |
| Merged Geosoft grid: Mag, Analytic Signal (403 Mb zip'd) |
| Merged Geosoft grid: Mag, Tilt Derivative (408 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Potassium (215 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Uranium (215 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Thorium (215 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Total Count (216 Mb zip'd) |
| Merged Geosoft grid: Residual Mag, Hi-Res Only (85 Mb zip'd) |
| Merged Geosoft grid: Mag First Vertical Derivative (1VD), Hi-Res Only (89 Mb zip'd) |
| Merged Geosoft grid: Mag, Analytic Signal, Hi-Res Only (86 Mb zip'd) |
| Merged Geosoft grid: Mag, Tilt Derivative, Hi-Res Only (87 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Potassium, Hi-Res Only (43 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Uranium, Hi-Res Only (43 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Thorium, Hi-Res Only (43 Mb zip'd) |
| Merged Geosoft grid: Radiometric, Total Count, Hi-Res Only (42 Mb zip'd) |
|
| GIS Layers: |
| Colour, shaded Geotiff, Residual Mag (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, First Vertical Derivative (1VD) (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, Analytic Signal (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, Tilt Derivative (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Residual Mag, Hi-Res Only (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, 1st Vert. Deriv., Hi-Res Only (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, Analytic Signal, Hi-Res Only (10 m resolution, 123 Mb zip'd) |
| Colour, shaded Geotiff, Mag, Tilt Derivative, Hi-Res Only (10 m resolution, 123 Mb zip'd) |
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