Imaging buried Quaternary valleys using the transient electromagnetic method

Buried Quaternary valleys in Denmark are complex structures filled with various deposits consisting primarily of glacio-lacustrine clay, till and meltwater sand, and gravel. The valleys are important geophysical targets, because they often contain significant volumes of groundwater used for public w...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied geophysics 2003-10, Vol.53 (4), p.199-213
Main Authors: Jørgensen, Flemming, Sandersen, Peter B.E., Auken, Esben
Format: Article
Language:English
Subjects:
Applied geophysics
Buried valleys
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrogeology
Hydrogeophysics
Hydrology. Hydrogeology
Imaging
Internal geophysics
Quaternary
TEM
Transient electromagnetic
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Buried Quaternary valleys in Denmark are complex structures filled with various deposits consisting primarily of glacio-lacustrine clay, till and meltwater sand, and gravel. The valleys are important geophysical targets, because they often contain significant volumes of groundwater used for public water supply. About 700 km of buried valley structures have been imaged in the western part of Denmark by the transient electromagnetic (TEM) method. The ability to map the valleys depends primarily on valley geometry, infill architecture and the resistivity of the fill sediments as well as the substratum. One-dimensional (1-D) inversion models of the TEM soundings have been used to construct contour maps of 20 m average resistivities and depth to a good conductor, which provide images for geological interpretation. Images of buried valley morphology, fill properties, infill architecture, such as cut-and-fill structures, valley distribution and valley generations, are characterized for case studies from Hornsyld, Holstebro and the Vonsild/Agtrup areas of Denmark.
ISSN:0926-9851
1879-1859
DOI:10.1016/j.jappgeo.2003.08.016