Authors / CoAuthors
Geophysical Acquisition & Processing Section
Abstract
The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. The Geological Survey of South Australia commissioned the Gawler Craton Airborne Survey (GCAS) as part of the PACE Copper initiative. The airborne geophysical survey was flown over parts of the Gawler Craton in South Australia. The program was designed to capture new baseline geoscientific data to provide further information on the geological context and setting of the area for mineral systems. This radiometric potassium grid has a cell size of 0.0004 degrees (approximately 41m) and shows potassium element concentration of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 in units of percent (or %). The data used to produce this grid was acquired in 2018 by the SA Government, and consisted of 90670 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.
Product Type
dataset
eCat Id
144981
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- theme.ANZRC Fields of Research.rdf
-
- EARTH SCIENCES
- ( Data centre )
-
- NCI
- ( Discipline )
-
- Earth sciences
- ( Discipline )
-
- geophysics
- ( Feature type )
-
- grid
- ( Place )
-
- Australia
- ( Place )
-
- SA
- ( Project )
-
- survey 1308
- ( Theme )
-
- AWAGS
- ( Theme )
-
- GADDS2.0
- ( Theme )
-
- radiometrics
- ( Theme )
-
- potassium
- ( Theme )
-
- airborne digital data
- ( Theme )
-
- geophysical survey
- ( Theme )
-
- rad
- ( Theme )
-
- K
- ( Theme )
-
- gamma-ray
- ( Theme )
-
- spectrometry
- ( Theme )
-
- grid
- ( Theme )
-
- raster
-
- Published_External
Publication Date
2020-10-31T00:00:00
Creation Date
2020-10-31T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) is an airborne-derived radiometric potassium grid for the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018. The Geological Survey of South Australia commissioned the Gawler Craton Airborne Survey (GCAS) as part of the PACE Copper initiative. The airborne geophysical survey was flown over parts of the Gawler Craton in South Australia. The program was designed to capture new baseline geoscientific data to provide further information on the geological context and setting of the area for mineral systems (http://energymining.sa.gov.au/minerals/geoscience/pace_copper/gawler_craton_airborne_survey). The survey was acquired under the project No. 1308 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 41m). A total of 90670 line-kilometres of data at a line spacing of 200m and 60m terrain clearance were acquired to produce this grid. This radiometric potassium grid shows potassium element concentration of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 in units of percent (or %). To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid (Milligan et al., 2009). This survey grid is essentially levelled to AWAGS. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134. References: Milligan, P.R., Minty, B.R.S., Richardson, M. & Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128, Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).
Parent Information
Geophysical Data Collection - Airborne Geophysics
UUID - ddeb0fc4-32e3-4913-80f2-f4249b17a925,
eCat ID - 111301
Extents
[-32.6698, -31.4958, 133.4888, 135.0116]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Association Type - operatedOnBy
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) NCSS
Association Type - operatedOnBy
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) OPeNDAP
Association Type - operatedOnBy
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) WMS
Association Type - operatedOnBy
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) WCS
Downloads and Links
File available for download in various formats from the GADDS2 portal
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) file download
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) NCSS
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) OPeNDAP
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) WMS
Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) WCS
Source Information
This Streaky Bay - K equivalent concentration grid (AWAGS, no nasvd) includes airborne-derived radiometric potassium data for the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 acquired for the geological survey of SA