Utilization of magnetic susceptibility and intensity of remanent magnetisation for chronostratigraphic correlation of lake sediments

Summary Magnetic susceptibility (k) and intensity of remanent magnetisation (J) logs can be used for chronostratigraphic correlation of the late Holocene stratigraphic sequence of the southern basin of Mara Lake. Q-ratio (J/k) logs also show a good correlation from core to core within the lake basin.Chronostratigraphic correlations of cores from Mara, Shawnigan and Christina Lakes were carried out on the basis of paleodeclination and paleoinclination log information and substantiated by the relative position of the Mt. Mazama tephra in the Mara and Shawnigan Lake stratigraphic sequences. This information was used as dating control to construct and compare magnetic susceptibility, intensity of remanent magnetisation and the Q ratio record for each of the three lakes. None of these three parameters would appear to be useful for correlation from lake basin to lake basin. Therefore, on the basis of this study magnetic susceptibility, intensity of remanent magnetisation and Q ratio logs can be used for intra-lake basin correlation but not for lake to lake correlation.Presented at 2nd conference on New Trends in Geomagnetism, Castle of Bechyn, Czechoslovakia, September 24–29, 1990.