UAV-electromagnetic measurements to map variations of depth to bedrock in southern Sweden
Bastani, M. ; Beckel, L. and Martin, T. LU
(2024)
4th Conference on Airborne, Drone and Robotic Geophysics, Held at the Near Surface Geoscience Conference and Exhibition 2024, NSG 2024
- Abstract
In the context of an infrastructure project UAV-electromagnetic measurements at five areas in southern parts of Sweden are conducted to study the variation of depth to the bedrock. The source signals are the distant radio transmitters in the band 15-350 kHz. The example shown in this work is from Area 5 where the underlying bedrock is a gneissic granite with reasonably high resistivity. The resistivity maps at lowest frequencies of the band reveal a N-NW low resistivity that coincides well with the observed increase of the soil thickness in the boreholes near the study area. The resistive bedrock is resolved well in all resistivity models from the 2D inversion. Drilling information in a borehole located at the centre of Area 5 report... (More)
In the context of an infrastructure project UAV-electromagnetic measurements at five areas in southern parts of Sweden are conducted to study the variation of depth to the bedrock. The source signals are the distant radio transmitters in the band 15-350 kHz. The example shown in this work is from Area 5 where the underlying bedrock is a gneissic granite with reasonably high resistivity. The resistivity maps at lowest frequencies of the band reveal a N-NW low resistivity that coincides well with the observed increase of the soil thickness in the boreholes near the study area. The resistive bedrock is resolved well in all resistivity models from the 2D inversion. Drilling information in a borehole located at the centre of Area 5 report presence of kaolinite below the quaternary sediments and on top of the bedrock at depth of 16 m. The closest resistivity model to the same borehole resolves an increase of resistivity at the depth of about 19 m. In general, the results are very promising although a sharp boundary inversion should be made to resolve depth to the bedrock more accurately.
(Less)
- author
- Bastani, M.
; Beckel, L.
and Martin, T.
LU
- organization
- publishing date
- 2024
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 4th Conference on Airborne, Drone and Robotic Geophysics, Held at the Near Surface Geoscience Conference and Exhibition 2024, NSG 2024
- publisher
- European Association of Geoscientists and Engineers
- conference name
- 4th Conference on Airborne, Drone and Robotic Geophysics, Held at the Near Surface Geoscience Conference and Exhibition 2024, NSG 2024
- conference location
- Helsinki, Finland
- conference dates
- 2024-09-08 - 2024-09-12
- external identifiers
-
- scopus:85214644586
- ISBN
- 9789462825109
- DOI
- 10.3997/2214-4609.202420010
- language
- English
- LU publication?
- yes
- id
- fe94cc33-a95e-4852-9ee0-a7134b7cef45
- date added to LUP
- 2025-02-26 09:49:38
- date last changed
- 2025-05-07 14:48:43
@inproceedings{fe94cc33-a95e-4852-9ee0-a7134b7cef45,
abstract = {{<p>In the context of an infrastructure project UAV-electromagnetic measurements at five areas in southern parts of Sweden are conducted to study the variation of depth to the bedrock. The source signals are the distant radio transmitters in the band 15-350 kHz. The example shown in this work is from Area 5 where the underlying bedrock is a gneissic granite with reasonably high resistivity. The resistivity maps at lowest frequencies of the band reveal a N-NW low resistivity that coincides well with the observed increase of the soil thickness in the boreholes near the study area. The resistive bedrock is resolved well in all resistivity models from the 2D inversion. Drilling information in a borehole located at the centre of Area 5 report presence of kaolinite below the quaternary sediments and on top of the bedrock at depth of 16 m. The closest resistivity model to the same borehole resolves an increase of resistivity at the depth of about 19 m. In general, the results are very promising although a sharp boundary inversion should be made to resolve depth to the bedrock more accurately.</p>}},
author = {{Bastani, M. and Beckel, L. and Martin, T.}},
booktitle = {{4th Conference on Airborne, Drone and Robotic Geophysics, Held at the Near Surface Geoscience Conference and Exhibition 2024, NSG 2024}},
isbn = {{9789462825109}},
language = {{eng}},
publisher = {{European Association of Geoscientists and Engineers}},
title = {{UAV-electromagnetic measurements to map variations of depth to bedrock in southern Sweden}},
url = {{http://dx.doi.org/10.3997/2214-4609.202420010}},
doi = {{10.3997/2214-4609.202420010}},
year = {{2024}},
}