Authors / CoAuthors
Geophysical Acquisition & Processing Section
Abstract
This GSQ Charters Towers Clermont potassium grid geodetic is an airborne-derived radiometric potassium window countrate grid for the Charters Towers-Clermont merge, 1987-1989 survey. 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 GSQ Charters Towers Clermont potassium grid geodetic radiometric potassium window countrate grid has a cell size of 0.00083 degrees (approximately 89m). The data are in units of counts per second (cps). The data used to produce this grid was acquired in 1987 by the QLD Government, and consisted of 40255 line-kilometres of data at 400m line spacing and 60m terrain clearance.
Product Type
dataset
eCat Id
140292
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
- ( Data centre )
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- NCI
- ( Discipline )
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- Earth sciences
- ( Discipline )
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- geophysics
- ( Feature type )
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- grid
- ( Place )
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- Australia
- ( Place )
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- QLD
- ( Project )
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- survey 1327
- ( Theme )
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- GADDS2.0
- ( Theme )
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- radiometrics
- ( Theme )
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- potassium
- ( Theme )
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- window countrate
- ( Theme )
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- airborne digital data
- ( Theme )
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- geophysical survey
- ( Theme )
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- rad
- ( Theme )
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- K
- ( Theme )
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- gamma-ray
- ( Theme )
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- spectrometry
- ( Theme )
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- grid
- ( Theme )
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- raster
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- Published_External
Publication Date
2020-03-07T00:00:00
Creation Date
2020-03-07T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This GSQ Charters Towers Clermont potassium grid geodetic is an airborne-derived radiometric potassium window countrate grid for the Charters Towers-Clermont merge, 1987-1989 survey. The survey was acquired in 1987 under the project No. 1327 for the geological survey of QLD. The data consisted of 40255 line-kilometres of data at 400m line spacing and 60m terrain clearance. The radiometric count rate is contaminated by background radiation contributions from the aircraft, cosmic rays, and the presence of Radon gas escaping from the ground. It is also affected by the ground clearance of the detector, as well as the volume of the detector. This grid was produced after applying radiometric corrections to the potassium window data from the survey. The final grid is checked for quality by GA geophysicists to ensure that the final data released are fit-for-purpose. This GSQ Charters Towers Clermont potassium grid geodetic has a cell size of 0.00083 degrees (approximately 89m) and shows the potassium window countrate of the Charters Towers-Clermont merge, 1987-1989 survey in units of counts per second (or cps). 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 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
[-23.1346, -19.6689, 145.8812, 147.8237]
Reference System
GDA94 (EPSG:4283)
Spatial Resolution
Service Information
Associations
Association Type - operatedOnBy
GSQ Charters Towers Clermont potassium grid geodetic NCSS
Association Type - operatedOnBy
GSQ Charters Towers Clermont potassium grid geodetic OPeNDAP
Association Type - operatedOnBy
GSQ Charters Towers Clermont potassium grid geodetic WMS
Association Type - operatedOnBy
Downloads and Links
File available for download in various formats from the GADDS2 portal
GSQ Charters Towers Clermont potassium grid geodetic file download
GSQ Charters Towers Clermont potassium grid geodetic NCSS
GSQ Charters Towers Clermont potassium grid geodetic OPeNDAP
Source Information
This GSQ Charters Towers Clermont potassium grid geodetic includes airborne-derived radiometric Potassium window count radiometric data for the Charters Towers-Clermont merge, 1987-1989 survey acquired for the geological survey of QLD