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Detection and Mapping of a Palaeokarstic Network in a Quarry Work Using GPR
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface Geoscience 2013 - 19th EAGE European Meeting of Environmental and Engineering Geophysics, Sep 2013, cp-354-00011
- ISBN: 978-90-73834-38-5
Abstract
A Ground Penetrating Radar (GPR) survey was conducted on the bench of a limestone quarry to detect and map a network of weathering. The investigated area is a rectangle of 16.60 m by 10.25m on the Carboniferous limestone from southern Belgium. Profiles are parallel and equally spaced of 25 cm from each other and the distance between each trace along a profile was 2 cm. The GPR survey was conducted using a 250 MHz antenna. After filtering, 2D-sections show very clearly weathered features to at least 10m in depth. A 3D model of the area was created to identify the branches of the weathered network. On time slices, these features are well located throughout the entire model and anthropic cuttings lines are recognized on their total height (~6m).