Data

Gawler Craton Airborne Survey Merge Radiometrics

Geoscience Australia
Geophysical Acquisition & Processing Section
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://ecat.ga.gov.au/geonetwork/srv/eng/search?uuid=50a5b91f-bd04-4406-b70e-88eb2ca4100c&rft.title=Gawler Craton Airborne Survey Merge Radiometrics&rft.identifier=http://ecat.ga.gov.au/geonetwork/srv/eng/search?uuid=50a5b91f-bd04-4406-b70e-88eb2ca4100c&rft.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. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered total dose rate grid. This Gawler Craton Airborne Survey Merge Radiometrics has a cell size of 0.0004 degrees (approximately 41m) and shows the total dose rate of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The data used to produce this grid was acquired in 2017-2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This Gawler Craton Airborne Survey Merge Radiometrics is an airborne-derived radiometric total dose rate grid for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The survey was acquired under the project No. 5000 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 41m). A total of 1660000 line-kilometres of data at a line spacing of Nonem were acquired to produce this grid. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. The terrestrial dose is derived as a linear combination of the filtered K, U and Th grids. To constrain long wavelengths in the grid used to produce this image, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS)(Milligan et al., 2009) data, was used to control the base levels of the survey grid. The levelling and grid-merging procedure is described in detail in Minty et al. (2003). 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. and Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128. Minty, B.R.S., Milligan, P.R., Luyendyk, A.P.J. and Mackey, T., 2003. Merging airborne magnetic surveys into continental-scale compilations. Geophysics, 68 (3), 988-995. Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=130.9895; southlimit=-32.6744; eastlimit=138.0596; northlimit=-27.3241; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=130.9895; southlimit=-32.6744; eastlimit=138.0596; northlimit=-27.3241; projection=GDA94 (EPSG:4283)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=© Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=EARTH SCIENCES&rft_subject=NCI&rft_subject=Earth sciences&rft_subject=geophysics&rft_subject=image&rft_subject=Australia&rft_subject=SA&rft_subject=survey 5000&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=thorium&rft_subject=uranium&rft_subject=potassium&rft_subject=dose rate&rft_subject=total dose&rft_subject=rate&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=K&rft_subject=Th&rft_subject=U&rft_subject=gamma-ray&rft_subject=spectrometry&rft_subject=raster&rft_subject=pseudocolour image&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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© Commonwealth of Australia (Geoscience Australia) and Department for Energy and Mining, Government of South Australia 2020

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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. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered total dose rate grid. This Gawler Craton Airborne Survey Merge Radiometrics has a cell size of 0.0004 degrees (approximately 41m) and shows the total dose rate of the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The data used to produce this grid was acquired in 2017-2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance.

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Maintenance and Update Frequency: notPlanned
Statement: This Gawler Craton Airborne Survey Merge Radiometrics is an airborne-derived radiometric total dose rate grid for the Gawler Craton Airborne Survey Magnetic Radiometric and DEM Merge, SA, 2017-2019 survey. The survey was acquired under the project No. 5000 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 41m). A total of 1660000 line-kilometres of data at a line spacing of Nonem were acquired to produce this grid. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. The terrestrial dose is derived as a linear combination of the filtered K, U and Th grids. To constrain long wavelengths in the grid used to produce this image, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS)(Milligan et al., 2009) data, was used to control the base levels of the survey grid. The levelling and grid-merging procedure is described in detail in Minty et al. (2003). 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. and Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128. Minty, B.R.S., Milligan, P.R., Luyendyk, A.P.J. and Mackey, T., 2003. Merging airborne magnetic surveys into continental-scale compilations. Geophysics, 68 (3), 988-995. Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 09 11 2020

Issued: 09 11 2020

Modified: 21 01 2021

Data time period: 2019 to 2019

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138.0596,-27.3241 138.0596,-32.6744 130.9895,-32.6744 130.9895,-27.3241 138.0596,-27.3241

134.52455,-29.99925

text: westlimit=130.9895; southlimit=-32.6744; eastlimit=138.0596; northlimit=-27.3241; projection=GDA94 (EPSG:4283)

Subjects
Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | K | NCI | Published_External | SA | Th | U | airborne digital data | dose rate | gamma-ray | geophysical survey | geophysics | geoscientificInformation | image | potassium | pseudocolour image | rad | radiometrics | raster | rate | spectrometry | survey 5000 | thorium | total dose | uranium |

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Other Information
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. (File available for download in various formats from the GADDS2 portal)

uri : https://portal.ga.gov.au/persona/gadds

Fully qualified pathname of NetCDF file on NCI filesystem for Gawler Craton Airborne Survey Merge Radiometrics. Users must be logged onto the NCI network to access this file system. (/g/data/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-radiometric-dose_total-AWAGS_RAD_2019.nc file at NCI)

local : file://iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/SA/image/P5000/P5000-image-radiometric-dose_total-AWAGS_RAD_2019.nc

Identifiers
  • global : 50a5b91f-bd04-4406-b70e-88eb2ca4100c