TY - GEN
T1 - Airborne gamma-ray spectrometry compilation and investigation of leveling discrepancies
AU - Stampolidis, A.
AU - Rønning, J. R.
AU - Ofstad, F.
AU - Baranwal, V. C.
AU - Heincke, B.
PY - 2014
Y1 - 2014
N2 - Large-scale airborne geophysical data are an important part of regional-scale mineral exploration and in that context NGU conducted an airborne magnetic and radiometric survey over the Kviteseid, Notodden and Ulefoss regions, in Telemark county in summer 2013 as a part of the MINS project (Mineral resources in South Norway). Results from a previous high resolution helicopter-borne gamma-ray spectrometry survey that was carried out in 2006 over the Fen Complex, Ulefoss region, were reevaluated in the light of the new data from the regional survey of the MINS project. We compare the thorium (eTh) ground concentrations of the two surveys, and although they have similar pattern, are showing significant scaling difference. The differences in the level of ground concentrations between two spectrometry surveys flown over the same region were investigated. Reprocessing of the old data revealed that the discrepancies arose from inappropriate selection of sensitivity coefficients during the calculation of elemental ground concentrations from height corrected gamma-ray counts. Therefore, correct calibration of the spectrometers are essential for the quality of the processed data.
AB - Large-scale airborne geophysical data are an important part of regional-scale mineral exploration and in that context NGU conducted an airborne magnetic and radiometric survey over the Kviteseid, Notodden and Ulefoss regions, in Telemark county in summer 2013 as a part of the MINS project (Mineral resources in South Norway). Results from a previous high resolution helicopter-borne gamma-ray spectrometry survey that was carried out in 2006 over the Fen Complex, Ulefoss region, were reevaluated in the light of the new data from the regional survey of the MINS project. We compare the thorium (eTh) ground concentrations of the two surveys, and although they have similar pattern, are showing significant scaling difference. The differences in the level of ground concentrations between two spectrometry surveys flown over the same region were investigated. Reprocessing of the old data revealed that the discrepancies arose from inappropriate selection of sensitivity coefficients during the calculation of elemental ground concentrations from height corrected gamma-ray counts. Therefore, correct calibration of the spectrometers are essential for the quality of the processed data.
UR - http://www.scopus.com/inward/record.url?scp=85088768028&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.20142061
DO - 10.3997/2214-4609.20142061
M3 - Conference article in proceedings
AN - SCOPUS:85088768028
T3 - Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
BT - Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics
PB - European Association of Geoscientists and Engineers
T2 - 20th European Meeting of Environmental and Engineering Geophysics of EAGE's Near Surface Geoscience Division
Y2 - 14 September 2014 through 18 September 2014
ER -