From Manual to Automatic AEM Bedrock Mapping
| Autor: | A.A. Pfaffhuber, Anne-Lise Berggren, Guillaume Sauvin, Helgard Anschütz, Asgeir Olaf Kydland Lysdahl, Sara Bazin, Malte Vöge |
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| Rok vydání: | 2017 |
| Předmět: |
geography
Geophysics Environmental Engineering geography.geographical_feature_category 010504 meteorology & atmospheric sciences Mining engineering Scope (project management) Bedrock 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Geology 0105 earth and related environmental sciences |
| Zdroj: | Journal of Environmental and Engineering Geophysics. 22:35-49 |
| ISSN: | 1943-2658 1083-1363 |
| DOI: | 10.2113/jeeg22.1.35 |
| Popis: | An extensive airborne electromagnetic (AEM) survey was carried out in Norway with the primary purpose to obtain information of depth to bedrock in areas with little or no prior geotechnical knowledge. We present different approaches to extract a bedrock model from the high-resolution time-domain AEM data, including both automated and manual procedures. It was found that in the area of investigation a user-driven approach of manual bedrock picking was the most suitable, taking into account the strongest vertical resistivity gradient and geological information as additional information. A semi-automatic, statistical method, called Localized Smart Interpretation (LSI), is also presented and discussed. This method, while not included in the original bedrock model for the entire area, showed promising results while using less time compared to the fully manual approach. It is recommended that LSI be considered in future projects of similar scope. |
| Databáze: | OpenAIRE |
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