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Earth Science Institute of the Slovak Academy of Sciences

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Polish Geological Institute Institute of Geology - Academy of Sciences of the Czech Republic

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IRON AGE SLAGS AT SNORUP (DENMARK): MAGNETIC PROSPECTING, MODELLING, RECONSTRUCTION AND DATING

• Geologica Carpathica
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• Volume 49 No.1 / February 1998

Published: Feb 1998

Pages: 61 - 70

Authors: NIELS ABRAHAMSEN, UWE KOPPELT, BO HOLM JACOBSEN, TATYANA SMEKALOVA, OLFERT VOSS

Abstract: A description of the archaeological reconstruction of iron production (100 to 700 AD) based upon bog-iron ore and charcoal in Denmark during the Iron Age is given, the total number of furnaces being of the order of 100,000. Examples of magnetic prospection for slags in general and in more detail, including simple interactive interpretation by inclined magnetic dipoles (spheres) are illustrated. Finally the mean magnetic remanent direction determined by a paleomagnetic study of oriented cores from three slag pits, as well as by magnetic inversion of the surface magnetic field from the same slag pits, is used to obtain a magnetic dating of the slag pits by comparison with the geomagnetic secular variation, suggesting that the mean age of the slag pits is between the 2^nd and 5^th centuries AD.

Keywords: Iron Age, Denmark, iron production, slags, magnetic prospecting, magnetic modelling, magnetic secular variation, magnetic dating, archaeomagnetism

Volume 49 no. 1 / February 1998

• JOHN-PAUL J. POLLARD, GRAHAM J. SHERWOOD, HARALD BOHNEL

  PRELIMINARY RESULTS FROM ROCK MAGNETIC ANALYSES OF QUATERNARY AND TERTIARY BASALTS FROM THE GULF COAST OF MEXICO

• PHILIP J. HOEDEMAEKER, MIROSLAV KRS, OTAKAR MAN, JOSEP M. PARES, PETR PRUNER, DANIELA VENHODOVA

  THE NEOGENE REMAGNETIZATION AND PETROMAGNETIC STUDY OF THE EARLY CRETACEOUS LIMESTONE BEDS FROM THE RIO ARGOS, (CARAVACA, PROVINCE OF MURCIA, SE SPAIN)

• JADWIGA KRUCZYK, MAGDALENA KADZIALKO-HOFMOKL, IGOR TUNYI, PAVOL PAGAC, JAN MELLO

  PALEOMAGNETIC STUDY OF TRIASSIC SEDIMENTS FROM THE SILICA NAPPE IN THE SLOVAK KARST, A NEW APPROACH

• MARINA ORLOVA

  THE DEVONIAN PALEOMAGNETIC POLE FOR THE SOUTHERN PART OF THE RUSSIAN PLATFORM (DONETS BASIN) AND ITS GEODYNAMIC IMPLICATION

• FILIPPOS VALLIANATOS

  ANALYSIS OF SELF- AND HETERODIFFUSION IN FERROMAGNETIC AND PARAMAGNETIC á-IRON

• KONSTANTINOS NOMIKOS, FILIPPOS VALLIANATOS

  ELECTROMAGNETIC VARIATIONS ASSOCIATED WITH THE SEISMICITY OF THE FRONTAL HELLENIC ARC

• NIELS ABRAHAMSEN, UWE KOPPELT, BO HOLM JACOBSEN, TATYANA SMEKALOVA, OLFERT VOSS

  IRON AGE SLAGS AT SNORUP (DENMARK): MAGNETIC PROSPECTING, MODELLING, RECONSTRUCTION AND DATING