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3D resistivity models from inversion of controlled source and radio-magnetotelluric (CSRMT) data at a quick-clay site in southwestern Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Geological Survey of Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Geological Survey of Sweden.
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2013 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

We have collected 3D tensor Controlled Source- and RadioMagnetotelluric data at a quick-clay site in southwesternSweden with the aim to image the geological structures thathave given rise to retrogressive landslides in the area. The3D resistivity models show layering within the glacial andpost-glacial sediments including marine clay, quick-clayand coarser grain sands. Because of the smoothingregularization used in the inversion, the lateral and depthextents of the quick-clays cannot be determined just byusing the resistivity model. The depth to the top of theresistive crystalline bedrock is to some extent uncertain.However, the geometry of the sediments and bedrock seenin the 3D resistivity model correlates reasonably well withthe results from the high resolution reflection seismic datacollected along the same lines in the site. The results showthat the bedrock deepens towards the river in the northernpart of the site.

Place, publisher, year, edition, pages
2013. 1950-1954 p.
Series
SEG Technical Program Expanded Abstracts, ISSN 1949-4645
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-286466DOI: 10.1190/segam2013-1164.1OAI: oai:DiVA.org:uu-286466DiVA: diva2:921555
Conference
SEG International Exposition and 83rd Annual Meeting, 22-27 September 2013, Houston, Texas, USA
Available from: 2016-04-20 Created: 2016-04-20 Last updated: 2016-06-20Bibliographically approved

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Shan, ChunlingMalehmir, AlirezaLundberg, Emil

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