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. This Tanami NS - radiometric line data (AWAGS) were acquired in 2018 by the NT Government, and consisted of 145230 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.
Product Type
dataset
eCat Id
144833
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
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- EARTH SCIENCES
- ( Discipline )
-
- Earth sciences
- ( Discipline )
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- geophysics
- ( Feature type )
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- line
- ( Place )
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- Australia
- ( Place )
-
- NT
- ( Project )
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- survey 1312
- ( Theme )
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- AWAGS
- ( Theme )
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- GADDS2.0
- ( Theme )
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- radiometrics
- ( Theme )
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- gamma-ray
- ( Theme )
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- spectrometry
- ( Theme )
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- NASVD
- ( Theme )
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- potassium
- ( Theme )
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- thorium
- ( Theme )
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- uranium
- ( Theme )
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- airborne digital data
- ( Theme )
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- geophysical survey
- ( Theme )
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- line
- ( Theme )
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- vector
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- Published_External
Publication Date
2020-11-03T00:00:00
Creation Date
2020-11-03T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This Tanami NS - radiometric line data (AWAGS) is an airborne-derived radiometric data for the NTGS Tanami NS Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018. The data was acquired under the project No. 1312 for the geological survey of NT. A total of 145230 line-kilometres of data at a line spacing of 200m were acquired during this survey. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data (Milligan et al., 2009). This survey data is essentially levelled to AWAGS. 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. 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
[-21.2514, -20.1841, 128.9885, 131.5353]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Downloads and Links
Source Information
This Tanami NS - radiometric line data (AWAGS) includes airborne-derived radiometric data for the NTGS Tanami NS Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 acquired for the geological survey of NT