| - General - |
| Geofile: | NFLD/3443 |
| Companies: | Geological Survey of Newfoundland and Labrador |
| Contractor: | Terraquest Ltd., Project B562 |
| Survey Area: | Terrenceville - Sound Island, South Coast Nfld. |
| NTS Areas: | 01M/08; 01M/08; 01M/09; 01M/10; 01M/11; 01M/14; 01M/15; 01M/16; 02D/01; 02D/02 |
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| - Survey Logistics - |
| Survey Date: | Aug. 5 to Oct. 31, 2023 |
| Block: | Terrenceville |
| Survey Extent: | 27457.10 line km; 4458.11 km Tie (593+87); 31915.21 km Total |
| Altitude: | Beechcraft King Air C90 (C-GCFZ) & Piper Navajo PA31-310 (C-GJBG): 90 m drape surface |
| Line Spacing: | 150 m, Az: 135°; Ties: 1000 m, Az: 045° |
| Positioning: | AgNav Inc. LiNav P151 GPS navigation system, with Hemisphere Eclipse R330 or 320 antenna (aircraft), providing L1/L2 real-time differential correction (GNSS broadcast) - to Trimble AG GPS 132 L1/L2 receiver at base; Bendix King KRA 10A radar altimeter; Honeywell PPT0020AWN2VA-C barometric pressure sensor with Vaisala relative humidity sensor |
| Instrumentation: | Three Geometrics G-822A split-beam cesium vapour magnetometers mounted in aircraft wingtip pods (transverse gradient) and tail boom (longitudinal gradient); Billingsley 3-axis flux-gate sensor magnetic field compensation system; two Radiation Solutions Inc. RS-500 gamma-ray spectrometers with 4 downward (33.44 l) and 1 upward (8.36 l) crystal detector packs, providing 1024 channel output; Magenta Inc. Matrix Plus VLF-EM, recording up to either 4 frequencies (C-GJBG) or 8 frequencies (C-GCFG); RMS Instruments DAARC 500 high-resolution digital data; Scintrex CS-3 cesium vapour mag, GEM Systems GSM-19 Overhauser (Walking Mag), and data logging (1 Hz) to flash card at base station acquisition system |
| Data Recorded: | Total field mag; horizontal gradient mag; 512 channel gamma-ray spectrometry; multi-frequency VLF-EM |
| Comments: | These data will be published as a timed Open File release, November 14, 2024. Although the data have been processed, levelling "challenges" remain in some of the data layers - these are most noticeable in the dervied products from radiometric and VLF-EM data. The data archives will need to be reworked at some point in the future. |
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| - Digital Data - |
| Date Submitted: | March 31, 2024 |
| Confidentiality Date: | November 14, 2024 |
| Grid Cell Size: | 30 m |
| Projection of Data: | NAD83, UTM Zone 21 |
| Data Comments: | Grid file names were revised slightly and a "_Terrenceville" suffix was appended. |
| Links to Data: |
| Profile archive, Magnetic, Geosoft database format (1.0 Gb zip'd) |
| Profile archive, Radiometric, Geosoft database format (1.7 Gb zip'd) |
| Profile archive, VLF-EM, Geosoft database format (600 Mb zip'd) |
| Interpolated grids, Mag & DTM, Geosoft, original, NAD83 (140 Mb zip'd) |
| Interpolated grids, Radiometric, Geosoft, original, NAD83 (40 Mb zip'd) |
| Interpolated grids, VLF-EM, Geosoft, original, NAD83 (80 Mb zip'd) |
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| GIS Layers: |
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