Upcoming TALKS

Title: Inversion of Airborne Gamma-Ray Spectrometry Data

Date: Tuesday May 14th at 4:00 PM EST

Speaker: Jessica Weihermann, Research Associate at Colorado School of Mines

Location: Live stream at University of Toronto, Department of Earth Sciences, Room ES2093 (22 Ursula Franklin Street)/Virtual, please register here

Abstract: 

Airborne gamma-ray spectrometry or radiometrics, has been used in many applications, such as geological mapping, environmental studies, and mineral exploration. The standard processing of gamma-ray spectrometry data provides good results when the acquisition conditions such as the flight and sensor orientation are constant. In practice, abrupt changes in flight height when flying in mountainous terrain are common, and standard processing neglecting this factor can lead to erroneous interpretation. The 2D inversion-based processing method incorporates the real aircraft height and replaces the sensitivity correction. In addition, the inclusion of positivity condition using a logarithmic barrier prevents unphysical negative values that may arise from steps in the standard processing. The resulting maps of the inversion-based processing enhance the anomalies facilitating the interpretation, suppresses the interpolation artefacts, and increase the signal-to-noise ratio.

Author Biography: Jessica Weihermann is a Research Associate at Colorado School of Mines. Her research interests focus is in developing new approaches to the radiometric method, on data analysis, processing, and interpretation of radiometric data combined with interdisciplinary knowledge and tools. She holds a B.Sc in Geology from Federal University of Paraná (2013) and earned her M.Sc and Ph.D. in Geophysics at Federal University of Paraná. She worked as a post-doctoral researcher at the University of Brasilia on a Vale project developing new interpretation techniques based on radiometric inversion.

Upcoming Talks:

TBD