East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid  


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 radiometric thorium grid has a cell size of degrees (approximately 40m) and shows thorium element concentration of the East Tasmania Magnetic and Radiometric Survey, 2022 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2022 by the TAS Government, and consisted of 57178 line-kilometres of data at 200m line spacing and 80m terrain clearance.

Product Type

dataset

eCat Id

147527

Contact for the resource

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

  Point of contact

 
Contact instructions
MEG

  Resource provider

 

Digital Object Identifier

https://dx.doi.org/10.26186/147527

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Data centre )
  • NCI
( Discipline )
  • Earth sciences
( Discipline )
  • geophysics
( Feature type )
  • grid
( Place )
  • Australia
( Place )
  • TAS
( Project )
  • survey 5020
( Theme )
  • GADDS2.0
( Theme )
  • radiometrics
( Theme )
  • NASVD
( Theme )
  • thorium
( Theme )
  • airborne digital data
( Theme )
  • geophysical survey
( Theme )
  • rad
( Theme )
  • Th
( Theme )
  • gamma-ray
( Theme )
  • spectrometry
( Theme )
  • grid
( Theme )
  • raster
  • Published_External

Publication Date

2022-11-22T00:00:00

Creation Date

2022-11-22T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

This data set forms part of the Tasmania and national airborne magnetic and radiometric mosaic that is continually updated with higher resolution datasets. When integrated with other geological, geochemical, geophysical or technical datasets, it provides pre-competitive insight into the mineral, groundwater, energy, soil and other resource potential of the continental land mass. Subject to the quality control, equipment tolerances and inherent limitations on the measurements themselves, it may also be employed for other geophysical and scientific investigations into the earth.

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

This East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid is an airborne-derived radiometric thorium grid for the East Tasmania Magnetic and Radiometric Survey, 2022. The survey was acquired under the project No. 5020 for the geological survey of TAS. The grid has a cell size of degrees (approximately 40m). A total of 57178 line-kilometres of data at a line spacing of 200m and 80m terrain clearance were acquired to produce this grid. This radiometric thorium grid shows thorium element concentration of the East Tasmania Magnetic and Radiometric Survey, 2022 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).

Parent Information

Geophysical Data Collection - Airborne Geophysics

UUID - ddeb0fc4-32e3-4913-80f2-f4249b17a925,

eCat ID - 111301

Extents

[-43.264377, -41.881109, 146.990272, 148.388113]

Reference System

GDA94 (EPSG:4283)

Spatial Resolution

Service Information

Associations

Association Type - operatedOnBy

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid NCSS    

Association Type - operatedOnBy

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid OPeNDAP    

Association Type - operatedOnBy

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid WMS    

Association Type - operatedOnBy

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid WCS    

Downloads and Links

File available for download in various formats from the GADDS2 portal  

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid file download  

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid NCSS  

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid OPeNDAP  

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid WMS  

East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid WCS  

Source Information

This East Tasmania Magnetic and Radiometric Survey, TAS, 2022, (P5020), Th equivalent ground concentration grid includes airborne-derived radiometric thorium data for the East Tasmania Magnetic and Radiometric Survey, 2022 acquired for the geological survey of TAS