GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic  


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 0.0005 degrees (approximately 51m) and shows thorium element concentration of the Southern Yilgarn (Boorabbin, Lk Johnstn, Sthn Cross, W Kal.), WA, 2004 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2004 by the WA Government, and consisted of 83101 line-kilometres of data at a line spacing between 200m and 400m, and 60m terrain clearance.

Product Type

dataset

eCat Id

143442

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

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Data centre )
  • NCI
( Discipline )
  • Earth sciences
( Discipline )
  • geophysics
( Feature type )
  • grid
( Place )
  • Australia
( Place )
  • WA
( Project )
  • survey 1065
( 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

2020-03-07T00:00:00

Creation Date

2020-03-07T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

This GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic is an airborne-derived radiometric thorium grid for the Southern Yilgarn (Boorabbin, Lk Johnstn, Sthn Cross, W Kal.), WA, 2004. The survey was acquired under the project No. 1065 for the geological survey of WA. The grid has a cell size of 0.0005 degrees (approximately 51m). A total of 83101 line-kilometres of data at a line spacing between 200m and 400, and 60m terrain clearance were acquired to produce this grid. This radiometric thorium grid shows thorium element concentration of the Southern Yilgarn (Boorabbin, Lk Johnstn, Sthn Cross, W Kal.), WA, 2004 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

[-33.0392, -30.9762, 119.679, 121.69]

Reference System

GDA94 (EPSG:4283)

Spatial Resolution

Service Information

Associations

Association Type - operatedOnBy

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic NCSS    

Association Type - operatedOnBy

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic OPeNDAP    

Association Type - operatedOnBy

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic WMS    

Association Type - operatedOnBy

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic WCS    

Downloads and Links

File available for download in various formats from the GADDS2 portal  

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic file download  

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic NCSS  

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic OPeNDAP  

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic WMS  

GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic WCS  

Source Information

This GSWA Boorabbin Lake Johnston ppm Thorium Grid Geodetic includes airborne-derived radiometric thorium data for the Southern Yilgarn (Boorabbin, Lk Johnstn, Sthn Cross, W Kal.), WA, 2004 acquired for the geological survey of WA