Authors / CoAuthors
Kroll, A. | Hutchens, M. | Goodwin, J.A.
Abstract
The Geological Survey of South Australia (GSSA) designed the Gawler Craton Airborne Survey (GCAS) to provide high resolution magnetic, gamma-ray and elevation data covering the northern portion of the Gawler Craton. In total, 1.66 million line km were planned over an area of 295,000 km2 , covering approximately 30% of the state of South Australia. The survey design of 200 m spaced lines at a ground clearance of 60 m can be compared with the design of existing regional surveys which generally employed 400 m line spacing and a ground clearance of 80 m. The new survey design results in ~2 x the data coverage and ~25% closer to the ground when compared to previous standards for regional surveys in South Australia. Due to the enormous scale of the survey, the data were acquired using four contractors who employed ten systems to fly the sixteen blocks. To standardise the data from the multitude of systems, Geoscience Australia (GA) employed a comprehensive set of technical specifications. As part of these specifications the contractors were required to fly each of the ten systems over a series of test lines termed the “Whyalla Test Lines” (Whyalla). The final GCAS data provide truly impressive high resolution regional scale products. These will allow more detailed geological interpretation of the prospective Gawler Craton. Survey blocks available for download include: Tallaringa North, block 1A Tallaringa South, block 1B Coober Pedy West, block 8A Billa Kalina, block 8B Childara, block 9A Lake Eyre, block 10 The following grids are available in this download: • Laser-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Radar-derived digital elevation model grids (m). Height relative to the Australian Height Datum. • Total magnetic intensity grid (nT). • Total magnetic intensity grid with variable reduction to the pole applied (nT). • Total magnetic intensity grid with variable reduction to the pole and first vertical derivative applied (nT/m). • Dose rate concentration grid (nGy/hr). • Potassium concentration grid (%). • Thorium concentration grid (ppm). • Uranium concentration grid (ppm). • NASVD processed dose rate concentration grid (nGy/hr). • NASVD processed potassium concentration grid (%). • NASVD processed thorium concentration grid (ppm). • NASVD processed uranium concentration grid (ppm). The following point located data are available in this download: • Elevation. Height relative to the Australian Height Datum. Datum: GDA94 • Total Magnetic Intensity. Datum: GDA94 • Radiometrics. Datum: GDA94
Product Type
dataset
eCat Id
132176
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Owner
Digital Object Identifier
Keywords
- theme.ANZRC Fields of Research.rdf
-
- PHYSICAL SCIENCESEARTH SCIENCES
- ( Theme )
-
- Magnetics
- ( Place )
-
- Gawler Craton
- ( Theme )
-
- Radiometrics
- ( Theme )
-
- DEM
- ( Theme )
-
- Airborne Geophysics
-
- Published_External
Publication Date
2019-12-09T00:54:14
Creation Date
2019-12-01T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Point located and gridded aeromagnetic, radiometric and digital elevation model data.
Maintenance Information
asNeeded
Topic Category
geoscientificInformation
Series Information
Lineage
Data was acquired by Thomson Aviation and Magspec Airborne Surveys. Funding was supplied under the PACE initiative. Databases were supplied by Thomson Aviation and Magspec Airborne Surveys. Grids were gridded using a minimum curvature method by Geoscience Australia using the databases delivered by the acquisition companies.
Parent Information
Extents
[-32.665, -27.35, 131.00, 138.00]
Reference System
GDA94 / MGA zone 53 (EPSG:28353)
Spatial Resolution
200m line spacing, 60m flight height
Service Information
Associations
Downloads and Links
Project description (pdf) [914 KB]
P1300 GCAS 8b Billa Kalina elevation located data [665 MB]
P1300 GCAS 8b Billa Kalina magnetics located data [909 MB]
P1300 GCAS 8b Billa Kalina radiometrics located data [68 MB]
P1300 GCAS 8b Billa Kalina elevation grids [68 MB]
P1300 GCAS 8b Billa Kalina magnetics grids [107 MB]
P1300 GCAS 8b Billa Kalina radiometrics grids [261 MB]
P1301 GCAS 9a Childara elevation located data [963 MB]
P1301 GCAS 9a Childara magnetics located data [1.4 GB]
P1301 GCAS 9a Childara radiometrics located data [99 MB]
P1301 GCAS 9a Childara elevation grids [102 MB]
P1301 GCAS 9a Childara magnetics grids [161 MB]
P1301 GCAS 9a Childara radiometrics grids [395 MB]
P1299 GCAS 8a CooberPedy elevation located data [640 MB]
P1299 GCAS 8a CooberPedy magnetics located data [921 MB]
P1299 GCAS 8a CooberPedy radiometrics located data [67 MB]
P1299 GCAS 8a CooberPedy elevation grids [67 MB]
P1299 GCAS 8a CooberPedy magnetics grids [108 MB]
P1299 GCAS 8a CooberPedy radiometrics grids [263 MB]
P1302 GCAS 10 Lake Eyre elevation located data [419 MB]
P1302 GCAS 10 Lake Eyre magnetics located data [625 MB]
P1302 GCAS 10 Lake Eyre radiometrics located data [48 MB]
P1302 GCAS 10 Lake Eyre elevation grids [44 MB]
P1302 GCAS 10 Lake Eyre magnetics grids [65 MB]
P1302 GCAS 10 Lake Eyre radiometrics grids [153 MB]
P1297 GCAS 1a Tallaringa Nth elevation located data [712 MB]
P1297 GCAS 1a Tallaringa Nth magnetics located data [999 MB]
P1297 GCAS 1a Tallaringa Nth radiometrics located data [74 MB]
P1297 GCAS 1a Tallaringa Nth 1A elevation grids [68 MB]
P1297 GCAS 1a Tallaringa Nth magnetics grids [107 MB]
P1297 GCAS 1a Tallaringa Nth radiometrics grids [262 MB]
P1298 GCAS 1b Tallaringa Sth elevation located data [1.0 GB]
P1298 GCAS 1b Tallaringa Sth magnetics located data [1.4 GB]
P1298 GCAS 1b Tallaringa Sth radiometrics located data [106 MB]
P1298 GCAS 1b Tallaringa Sth elevation grids [110 MB]
Source Information