Inversion of non-linear quantities derived from potential fields

V. Paoletti, H. Bingham, M. Abbas, M. Fedi

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In recent years, potential field quantities such as the Normalized Source Strength and the Total Gradient have been increasingly used in applied and environmental geophysics because of their properties. They are always non-negative and minimally affected by the direction of the source’s remanent magnetization. Despite the fact that these quantities are derived from nonlinear transformations of potential field data, a linear inversion approach of NSS and TG is often used in the literature without investigating its theoretical and practical limits. In this paper, we present an approach for the nonlinear constrained inversion of these quantities and apply it to synthetic data and measurements carried out at the Vredefort structure, South Africa. We show, through GSVD analysis tools, that the nonlinearity of the problem can hamper the inversion results when using a linear approach, whereas our nonlinear iterative approach leads to more reliable reconstructions of the subsurface density/magnetization distribution.
Original languageEnglish
Title of host publicationProceedings of the 81st EAGE Conference and Exhibition
PublisherEuropean Association of Geoscientists and Engineers
Publication date2019
ISBN (Electronic)978-946282289-4
DOIs
Publication statusPublished - 2019
Event 81st EAGE Conference and Exhibition 2019 - ExCeL Centre, London, United Kingdom
Duration: 3 Jun 20196 Jun 2019
Conference number: 81

Conference

Conference 81st EAGE Conference and Exhibition 2019
Number81
LocationExCeL Centre
CountryUnited Kingdom
CityLondon
Period03/06/201906/06/2019

Cite this

Paoletti, V., Bingham, H., Abbas, M., & Fedi, M. (2019). Inversion of non-linear quantities derived from potential fields. In Proceedings of the 81st EAGE Conference and Exhibition European Association of Geoscientists and Engineers. https://doi.org/10.3997/2214-4609.201901494