Data

GSQ Ayr St Lawrence Qld ppm thorium grid geodetic

Geoscience Australia
Geophysical Acquisition & Processing Section
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/141835&rft.title=GSQ Ayr St Lawrence Qld ppm thorium grid geodetic&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/141835&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. This radiometric thorium grid has a cell size of 0.00096 degrees (approximately 103m) and shows thorium element concentration of the Ayr-St Lawrence, QLD, AIRDATA, 1996 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the QLD Government, and consisted of 108435 line-kilometres of data at 400m line spacing and 80m terrain clearance.Maintenance and Update Frequency: notPlannedStatement: This GSQ Ayr St Lawrence Qld ppm thorium grid geodetic is an airborne-derived radiometric thorium grid for the Ayr-St Lawrence, QLD, AIRDATA, 1996. The survey was acquired under the project No. 796 for the geological survey of QLD. The grid has a cell size of 0.00096 degrees (approximately 103m). A total of 108435 line-kilometres of data at a line spacing of 400m and 80m terrain clearance were acquired to produce this grid. This radiometric thorium grid shows thorium element concentration of the Ayr-St Lawrence, QLD, AIRDATA, 1996 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. 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. Reference: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).&rft.creator=Geophysical Acquisition & Processing Section &rft.date=2020&rft.coverage=westlimit=146.7203; southlimit=-23.4667; eastlimit=150.2685; northlimit=-19.499; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=146.7203; southlimit=-23.4667; eastlimit=150.2685; northlimit=-19.499; 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=(c) Geological Survey of Queensland 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=grid&rft_subject=Australia&rft_subject=QLD&rft_subject=survey 796&rft_subject=GADDS2.0&rft_subject=radiometrics&rft_subject=NASVD&rft_subject=thorium&rft_subject=airborne digital data&rft_subject=geophysical survey&rft_subject=rad&rft_subject=Th&rft_subject=gamma-ray&rft_subject=spectrometry&rft_subject=raster&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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(c) Geological Survey of Queensland 2020

Australian Government Security ClassificationSystem

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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. This radiometric thorium grid has a cell size of 0.00096 degrees (approximately 103m) and shows thorium element concentration of the Ayr-St Lawrence, QLD, AIRDATA, 1996 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the QLD Government, and consisted of 108435 line-kilometres of data at 400m line spacing and 80m terrain clearance.

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Maintenance and Update Frequency: notPlanned
Statement: This GSQ Ayr St Lawrence Qld ppm thorium grid geodetic is an airborne-derived radiometric thorium grid for the Ayr-St Lawrence, QLD, AIRDATA, 1996. The survey was acquired under the project No. 796 for the geological survey of QLD. The grid has a cell size of 0.00096 degrees (approximately 103m). A total of 108435 line-kilometres of data at a line spacing of 400m and 80m terrain clearance were acquired to produce this grid. This radiometric thorium grid shows thorium element concentration of the Ayr-St Lawrence, QLD, AIRDATA, 1996 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. 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. Reference: Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 07 03 2020

Issued: 07 03 2020

Modified: 06 07 2021

Data time period: 16 09 1995 to 21 04 1996

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150.2685,-19.499 150.2685,-23.4667 146.7203,-23.4667 146.7203,-19.499 150.2685,-19.499

148.4944,-21.48285

text: westlimit=146.7203; southlimit=-23.4667; eastlimit=150.2685; northlimit=-19.499; projection=GDA94 (EPSG:4283)

Subjects
Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | NASVD | NCI | Published_External | QLD | Th | airborne digital data | gamma-ray | geophysical survey | geophysics | geoscientificInformation | grid | rad | radiometrics | raster | spectrometry | survey 796 | thorium |

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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

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