Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS)

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 ( http://energymining.sa.gov.au/minerals/geoscience/pace_copper/gawler_craton_airborne_survey).


This radiometric thorium image has a cell size of 0.0004 degrees (approximately 41m) and shows thorium element concentration of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 in units of parts per million (or ppm). Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. The data used to produce this image was acquired in 2019 by the SA Government, and consisted of 1660000 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.

Simple

Identification info

Date (Creation)
2020-11-09T00:00:00
Date (Publication)
2020-11-09T00:00:00
Date (Revision)
2021-01-21T22:31:32
Cited responsible party
Role Organisation / Individual Name Details
Author

Geophysical Acquisition & Processing Section
Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Topic category
  • Geoscientific information

Extent

N
S
E
W


Temporal extent

Time period
2019-01-01T00:00:00 2019-01-01T00:00:00
Maintenance and update frequency
Not planned

Resource format

Title

Product data repository: Various Formats

Website

Data Store directory containing the digital product files

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

theme.ANZRC Fields of Research.rdf

  • EARTH SCIENCES

Data centre

  • NCI

Discipline

  • Earth sciences

Discipline

  • geophysics

Feature type

  • image

Place

  • Australia

Place

  • SA

Project

  • survey 5000

Theme

  • AWAGS

Theme

  • GADDS2.0

Theme

  • radiometrics

Theme

  • thorium

Theme

  • airborne digital data

Theme

  • geophysical survey

Theme

  • rad

Theme

  • Th

Theme

  • gamma-ray

Theme

  • spectrometry

Theme

  • pseudocolour image

Theme

  • raster

Theme

  • nasvd

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License
Other constraints

© Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Geoscience Australia

 Voice
OnLine resource

File available for download in various formats from the GADDS2 portal

The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS.

Distribution format

  • WWW:LINK-1.0-http--link

Distributor contact
Role Organisation / Individual Name Details
Distributor

National Computational Infrastructure

 Voice
OnLine resource

/g/data/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-radiometric-th_conc-AWAGS_RAD_2019.nc file at NCI

Fully qualified pathname of NetCDF file on NCI filesystem for Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS). Users must be logged onto the NCI network to access this file system.

Distribution format

  • FILE:GEO

Distributor contact
Role Organisation / Individual Name Details
Distributor

National Computational Infrastructure

 Voice
OnLine resource

/g/data/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-radiometric-th_conc-AWAGS_RAD_2019.nc file download

File download for Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS)

Distribution format

  • WWW:LINK-1.0-http--link

Resource lineage

Statement

This Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS) is an airborne-derived radiometric thorium pseudocolour image for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019.

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. 5000 for the geological survey of SA. The image has a cell size of 0.0004 degrees (approximately 41m). A total of 1660000 line-kilometres of data at a line spacing of 200m and 60m terrain clearance were acquired to produce this image. This radiometric thorium image shows thorium element concentration of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 in units of parts per million (or ppm). Noise-adjusted singular value decomposition (NASVD) has been applied to the data. NASVD is a spectral component analysis procedure for the removal of noise from gamma-ray spectra. 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). 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).

Hierarchy level
Dataset
Description

This Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS) includes airborne-derived radiometric thorium data for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 acquired for the geological survey of SA.

Reference System Information

Reference system identifier
EPSG/GDA94 (EPSG:4283)

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/25248425-3adb-4168-a5ad-47d8e3d17e8a

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Manager Client Services
Title

Geophysical Data Collection - Airborne Geophysics

Citation identifier
ddeb0fc4-32e3-4913-80f2-f4249b17a925

Citation identifier
111301

Type of resource

Resource scope
Dataset
Name

Gawler Craton Airborne Survey Merge Radiometrics - Th equivalent concentration image (AWAGS)

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/144812

Date info (Creation)
2020-12-23T00:00:00
Date info (Revision)
2020-12-23T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

AWAGS Earth sciences GADDS2.0 NCI Th airborne digital data gamma-ray geophysical survey geophysics image nasvd pseudocolour image rad radiometrics raster spectrometry survey 5000 thorium
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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