Improving the quality of aerial gamma-ray surveys

Bruce Dickson

doi:10.1071/ASEG2001ab029

ISSN: 2202-0586
E-ISSN:

oa Improving the quality of aerial gamma-ray surveys
Authors Bruce Dickson^a
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^a CSIRO Exploration & Mining, Australia,, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2001, Issue ASEG2001 - 15th Geophysical Conference, Dec 2001, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2001ab029
- Published online: 01 Dec 2001

Abstract

A review of the parameters used in processing aerial gamma-ray survey data from a number of recent surveys showed that many surveys were processed with incorrect values. Many of the problems arise from unrecognized variations in concentrations of airborne radon during the collection of the calibration data. These problems may be overcome by:

Testing values against expected values to flag potential problems,
Deriving the height attenuation coefficient for U from the average values for K and Th if the value does not fall between those for K and Th, and,
Calculating the sensitivity coefficients at various heights and plotting the K/U and K/Th ratios to reveal any radon effects.

If necessary, a U sensitivity value can be obtained by appropriately scaling the Th value.

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2001-12-01

2026-01-22

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References

Grasty, R.L. and Minty, B.R.S., 1995. A guide to the technical specifications for airborne gamma-ray surveys. AGSO Record 1995/60, 89pp.
IAEA, 1989. Construction and use of calibration facilities for radiometric field equipment. Report 309, IAEA Vienna.
IAEA, 1991. Airborne gamma ray spectrometer surveying, Report 323, IAEA Vienna.
Minty B.R.S., Mackey T., and Grasty R.L., 1999. A calibration range in south-eastern Australia for airborne gamma-ray spectrometers. Exploration Geophysics 30, 27-32.

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Article Type: Research Article

Keyword(s): aerial gamma-ray survey calibration radon

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