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A palaeomagnetic study of maar-lake sediments from the Westeifel

  • B. Haverkamp
  • Th. Beuker
Palaeomagnetism
Part of the Lecture Notes in Earth Sciences book series (LNEARTH, volume 49)

Abstract

A record of geomagnetic secular variations (SV) has been obtained from 13 cores from the maar-lakes Meerfelder Maar (MFM), Holzmaar (HZM) and Schalkenmehrener Maar (SMM). Logs of initial magnetic susceptibility have been used for intercore correlation. Remanence variations in declination and first of all in inclination from the different lakes have been combined. The Westeifel SV curves as derived so far for the last 10,000 yrs agree well with the SV mastercurves for the U.K. (Turner & Thompson 1979, 1981, 1982), but with differences in age up to 1000 yrs. The time-scale for the post-glacial Westeifel sediments is based on varve-chronology (Zolitschka 1986, 1989, 1990). The glacial sediment sequences were dated by matching our SV records with those from Lac du Bouchet (Thouveny et al. 1990). An ash flow tuff (basaltic ash tuff, MFM 38.5 m) was dated in this way to 25,700 yrs BP. This age agrees well with a thermoluminescence age for this tuff of about 25,000 yrs BP (Velde 1988).

Keywords

Secular Variation Natural Remanent Magnetization Isothermal Remanent Magnetization Piston Corer Glacial Sediment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • B. Haverkamp
    • 1
  • Th. Beuker
    • 1
  1. 1.Institut für GeophysikWWU MünsterMünster

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