Distribution of U and Th in an Iberian U-fertile granitic complex (NW, Spain): airborne-radiometry, chemical and statistical approaches

Mohamud, Abdullahi Hassan; Cózar, J.S.; Rodrigo-Naharro, Julio; Villar, Luis

doi:10.1016/j.gexplo.2014.07.022

Cited by 8 publications

(2 citation statements)

References 24 publications

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“…Airborne Gamma-Ray Spectroscopy (AGRS) is a proximal remote sensing method that allows quantifying the abundances of natural ( 40 K, 238 U, 232 Th) and artificial (e.g., 137 Cs) radionuclides present in the topsoil (~30 cm depth) over relatively large scales. Studying the spatial distribution of these radionuclides is strategic for monitoring environmental radioactivity [ 1 ], producing thematic maps of geochemical interest [ 2 , 3 , 4 ], identifying radioactive orphan sources [ 5 ] or investigating areas potentially contaminated by nuclear fallout [ 6 ]. Sodium iodide scintillation detectors (NaI(Tl)) are widely employed in AGRS measurements thanks to the high portability and high detection efficiency which allow performing surveys over extended areas in reasonable times and minimizing costs.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Flight Altitude Measured with Low-Cost GNSS, Radar and Barometer Sensors: Implications for Airborne Radiometric Surveys

Albéri

Baldoncini

Bottardi

et al. 2017

Sensors

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Flight height is a fundamental parameter for correcting the gamma signal produced by terrestrial radionuclides measured during airborne surveys. The frontiers of radiometric measurements with UAV require light and accurate altimeters flying at some 10 m from the ground. We equipped an aircraft with seven altimetric sensors (three low-cost GNSS receivers, one inertial measurement unit, one radar altimeter and two barometers) and analyzed ~3 h of data collected over the sea in the (35–2194) m altitude range. At low altitudes (H < 70 m) radar and barometric altimeters provide the best performances, while GNSS data are used only for barometer calibration as they are affected by a large noise due to the multipath from the sea. The ~1 m median standard deviation at 50 m altitude affects the estimation of the ground radioisotope abundances with an uncertainty less than 1.3%. The GNSS double-difference post-processing enhanced significantly the data quality for H > 80 m in terms of both altitude median standard deviation and agreement between the reconstructed and measured GPS antennas distances. Flying at 100 m the estimated uncertainty on the ground total activity due to the uncertainty on the flight height is of the order of 2%.

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Section: Introductionmentioning

confidence: 99%

Accuracy of Flight Altitude Measured with Low-Cost GNSS, Radar and Barometer Sensors: Implications for Airborne Radiometric Surveys

Albéri

Baldoncini

Bottardi

et al. 2017

Sensors

View full text Add to dashboard Cite

show abstract

“…Together with other data sets, airborne radiometric maps are valuable for petrogenetic studies (Tartèse et al., 2011; Xhixha et al., 2016) or for the study of surface processes, as shown by the global map of weathering of Australia produced by Wilford (2012). Gamma rays surveys are also useful for understanding the behavior of Th, and U in granitic complexes (Mohamud et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

The Impact of Measurement Scale on the Univariate Statistics of K, Th, and U in the Earth Crust

Baratoux

Fall

Meslin

et al. 2021

Earth and Space Science

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The impact of measurement scale on the univariate statistics of K, Th, and U in the Earth crust

Baratoux

Fall

Meslin

et al. 2021

Preprint

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Distribution of U and Th in an Iberian U-fertile granitic complex (NW, Spain): airborne-radiometry, chemical and statistical approaches

Cited by 8 publications

References 24 publications

Accuracy of Flight Altitude Measured with Low-Cost GNSS, Radar and Barometer Sensors: Implications for Airborne Radiometric Surveys

Accuracy of Flight Altitude Measured with Low-Cost GNSS, Radar and Barometer Sensors: Implications for Airborne Radiometric Surveys

The Impact of Measurement Scale on the Univariate Statistics of K, Th, and U in the Earth Crust

The impact of measurement scale on the univariate statistics of K, Th, and U in the Earth crust

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