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Mapping and characterization of Induced Polarization in airborne TEM data from central East Greenland: application of a Self-Organizing Map procedure
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1629-2920
GEUS.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Number of Authors: 4
2016 (English)Conference paper, Poster (Refereed)
Abstract [en]

nduced Polarization (IP) effects were observed in airborne Time Domain EM (TEM) data acquired in central East Greenland in the context of exploration for disseminated sulphides in a sedimentary basin. Some of the IP anomalies were targeted by drilling which revealed the absence of mineralization. In order to understand the possible causes of the IP effects we first identified them in the TEM data. IP indicators were extracted from the shape of the transient curves at every measurement location and were analysed by using a Self-Organizing Map (SOM) procedure. Results from K-mean clustering of the SOM are visualized on a geographical map showing the transient curves’ characteristics. Some of the clusters are clearly correlated with the geology whereas others merely reflect recordings below the noise level. In order to interpret the cause of the IP anomalies the airborne TEM data were inverted for the Cole-Cole parameters.

Place, publisher, year, edition, pages
2016.
National Category
Geophysics Geology
Research subject
Exploration Geophysics; Ore Geology
Identifiers
URN: urn:nbn:se:ltu:diva-60805OAI: oai:DiVA.org:ltu-60805DiVA: diva2:1050691
Conference
4th International Workshop on Induced Polarization - IP2016, Aarhus, June 6-8, 2016
Available from: 2016-11-29 Created: 2016-11-29 Last updated: 2016-11-30Bibliographically approved

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Brethes, AnaïsRasmussen, Thorkild MaackBauer, Tobias
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