Brief description
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 radiometric uranium grid has a cell size of 0.0002 degrees (approximately 20m) and shows uranium element concentration of the South West 1 (Moora), WA, 2011, South West 2 (Corrigin), 2012 survey. The data used to produce this grid was acquired in 2012 by the WA Government, and consisted of 137777, 115349 line-kilometres of data at 200m line spacing and 50m terrain clearance.
Lineage
This rWA1240_1241_Kauring_u.nc grid is an airborne-derived radiometric uranium equivalent grid for the South West 1 (Moora), WA, 2011, South West 2 (Corrigin), 2012 survey. The survey was acquired under the project No. 1240, 1241 for the geological survey of WA. The grid has a cell size of 0.0002 degrees (approximately 20m). A total of 137777, 115349 line-kilometres of data at a line spacing of 200m were acquired to produce this grid. 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. Further up to date information about individual surveys can also be obtained online from the Airborne Surveys Database at http://www.ga.gov.au/oracle/argus/.The original grid was converted from ERMapper (.ers) format to netCDF4_classic format using GDAL1.11.1. The main purpose of this conversion is to enable access to the data by relevant open source tools and software. The netCDF grid was created on 2016-08-29T10:51:42, 2013-05-03T00:00:00 and has its y-axis indexed Southward-positive.
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).
Issued: 2011
Data time period: 2011-06-13 to 2012-03-25
text: northlimit=-31.801700; southlimit=-31.999700; westlimit=116.941700; eastLimit=117.164300
Subjects
AWAGS |
Australia |
Earth sciences |
NCI |
Published_External |
WA |
airborne digital data |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
radiometrics |
survey 1240 |
survey 1241 |
uranium |
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Other Information
Digital Object Identifier for dataset 694f83a3-9448-4cc6-af56-466af817d14a
doi :
http://dx.doi.org/10.4225/25/58a4000c7c995
Fully qualified pathname of NetCDF file on NCI filesystem for dataset 694f83a3-9448-4cc6-af56-466af817d14a. Users must be logged onto the NCI network to access this file system. (md5sum=456ce53c55b94ed73d963351376257e7) (NetCDF file on NCI filesystem for dataset 694f83a3-9448-4cc6-af56-466af817d14a)
local : file:///g/data1/rr2/airborne_geophysics/WA/P1240_1241/radiometrics/uranium/grid/rWA1240_1241_Kauring_u/rWA1240_1241_Kauring_u.nc
Identifiers
- global : 694f83a3-9448-4cc6-af56-466af817d14a
- URI : http://pid.geoscience.gov.au/dataset/ga/107777
- DOI : 10.4225/25/58a4000c7c995
