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Combining electromagnetic measurements in the Mygdonian sedimentary basin, Greece
Oulu Mining School, University of Oulu.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Institute of Engineering Seismology and Earthquake Engineering, Thessaloniki.
Department of Environmental and Natural Resources Engineering, Technological Educational Institute of Crete, Chania.
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Number of Authors: 5
2016 (English)In: Journal of Applied Geophysics, ISSN 0926-9851, E-ISSN 1879-1859, Vol. 135, 261-269 p.Article in journal (Refereed) Published
Abstract [en]

We present a novel approach where time-domain electromagnetic (TEM) data are transformed and subsequently used in two-dimensional (2-D) magnetotelluric inversion of the determinant of the impedance tensor. The main idea is to integrate TEM with magnetotelluric (MT) data to produce subsurface electrical resistivity models. Specifically, we show that 2-D MT data inversion of the determinant of the impedance tensor supported by inclusion of TEM–MT-transformed data has superior resolution at the near surface and at the same time static shift afflicting the MT data can be addressed. Thus, the approach allows for practical express integration of TEM data with MT measurements as opposed to a full combined 3-D inversion, which requires significant resources. The approach is successfully applied in the Mygdonian sedimentary basin located in Northern Greece. In addition to TEM and MT data, also controlled source — and radiomagnetotelluric data are available from the Mygdonian basin, which have been subjected to 2-D analysis previously. We have extended the analysis to a full 3-D inversion using ModEM code. All obtained models are analysed and are in a good agreement.

Place, publisher, year, edition, pages
2016. Vol. 135, 261-269 p.
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Research subject
Exploration Geophysics
URN: urn:nbn:se:ltu:diva-60003DOI: 10.1016/j.jappgeo.2016.10.014ISI: 000390731900025ScopusID: 2-s2.0-84993126391OAI: diva2:1040484

Validerad; 2016; Nivå 2; 2016-11-20 (andbra)

Available from: 2016-10-27 Created: 2016-10-27 Last updated: 2017-01-20Bibliographically approved

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