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Geophysical Investigation of the Malga Archaeological Park (Carthage, Tunisia)Normal access

Authors: A. Jrad, C. Jallouli, Y. Quesnel and P. Rochette
Event name: 24th European Meeting of Environmental and Engineering Geophysics
Session: Forensic and Archaeogeophysics I & Geophysical Surveys in Permafrost & Geophysics in Precision Agriculture I
Publication date: 09 September 2018
DOI: 10.3997/2214-4609.201802512
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 642.28Kb )
Price: € 20

A non-invasive multitechnical geophysical survey, using magnetic cartography, seismic and electrical resistivity tomographies, was carried out at the Malga archaeological park of Carthage in Tunisia. The goals were to understand the geological stratigraphy of the subsurface and to locate buried archaeological relics at the high-potential archaeological area of El Malga site. A potential linear magnetic anomaly was observed at the eastern-north side of the prospected area and which can be related to ruins probably made of sandy bricks like those of the Carthage-Zaghouan Aqueduct. Numerous bipolar magnetic anomalies are also characterized suggesting the presence of magnetized bodies in the subsurface. Seismic tomography profiles crossing magnetic anomalies show four main stratigraphic layers which are from the top to the bottom; the weathered zone with the lowest seismic velocity, a more compacted layer which deposited above the layers with the higher seismic velocity. The enhancement of the velocity can be related to enrichment with limestone or the impact of the phreatic table water. A depth of about 1 m was defined for potential archaeological features with strong electrical resistivity contrasts.

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