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SERVICETECHNOLOGYABOUT USREFERENCESPROJECTS
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SAVE THE DATE
01-02.09.2023
25 Years Eastern Atlas

10/22
CAA Köln

GER-NL-Fl chapter

09/22
IMC Innsbruck

Mountain congress

09/22
ICNS Warzawa

Nubian Studies

 PARTNERS

COOPERATIVE PARTNERS
Archaeology

Minerex, Ireland
Hartmut Krahn
www.mgx.ie

University Gent
Prof. Frank Vermeulen
www.ugent.be

University Groningen
Prof. Peter Attema
www.rug.nl

University Zuerich
Dr. Rouven Turck
www.archaeologie.uzh.ch

FIAK - Free Institute
for Applied Cultural Studies

Cottbus - Fulda
www.fiak.de

Geophysical Modelling
Dr. Thomas Günther,
Hannover

www.resistivity.net
Prof. Dr. Andreas Weller,
TU Clausthal

www.ifg.tu-clausthal.de

Exzellenzcluster TOPOI
Freie Universität Berlin /
Humboldt-Universität
zu Berlin

www.topoi.org

Resistivity  Detection of underground structures with resistivity methods is possible using the specific electrical conductivity (σ) or the specific electrical resistivity (ρ; ρ = 1 / σ). Hence archaeological features can be mapped when they are of higher or lower resistivity than their surroundings. In general walls and foundations show through an increase in resistivity whereas ditches and pits show through an increase in conductivity.

To define the electrical characteristics of an area several metal probes (electrodes) are placed into the ground. Two probes are used to inserted an electrical current (I) into the earth. Thus the potential difference (U) between two other probes and therewith the electrical resistivity is obtained. Besides that the specific resistivity depends on a geometry factor defined by the exact position of each probe in the measurement.

Various configurations of electrodes and a wide range of geoelectrical investigation methods exist. To detect near surface resistivity anomalies geoelectrical mapping is most efficient. In order to reach a greater depth of penetration multi-electrode-measurements are used. They result either in 2D-vertical sections or 3D-models of the resistivity distribution and give information about the depth of expected
underground structures.

Using state-of-the-art multi-electrode systems eastern atlas is able to do 1D sounding, 2D mapping and sounding as well as 3D electrical resistivity tomography (ERT). Furthermore we use the method of induced polarization (IP) - a technique that benefits of the phase shift between electrical current and voltage – for archeometallurgical investigations and in search for buried wooden structures. We also apply inductive electromagnetic measurements for large scaled agricultural prospections. One advantage of the latter is that it does not require direct contact with the ground. Thus the conductivity distribution of large areas is detected and soil categories can be classified quick and easily.

Resistivity field work and data examples:
Resistivity instrument in field
sheme of 2D resistivity imaging
IP (Induced Polarisation) measurements on slag heap
3D IP model of a slag heap
(© Th. Günther / C. Rücker)
Resistivity profile on the hill fort of Lossow
 DOWNLOAD

ACTIVITY OVERVIEW
Archaeology, building research
and forensics

download

ARCHAEOPROSPECTION
Brochure (German)
download


TECHNOLOGY
Geomagnetics (German)
download
IP geoelectrics at slag heaps (English)
download
(Poster at Conference on "Early Iron in Europe – Prehistoric and Roman Iron Production", Hüttenberg, Austria, Sept. 2008)


ENGINEERING AND
ENVIRONMENTAL GEOPHYSICS

Geophysics in civil engineering
download
(Excerpt of a dissertation at
TU Berlin by Dipl.-Ing. Holger Böhm, in German)


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