A palaeomagnetic study of maar-lake sediments from the Westeifel

作者: B. Haverkamp , Th. Beuker

DOI: 10.1007/BFB0117606

关键词: GeomorphologyGeologySecular variationEarth's magnetic fieldGlacial periodSedimentMaarDeclinationBasaltGeochemistryNatural remanent magnetization

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

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