Physics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pepi...52..232h&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 52, Issue 3-4, p. 232-242.
Physics
Scientific paper
Rock magnetic properties of sediments from the Werne 27, Konrad 101 and Anderten-Mühle 1 borehole sections, NW Germany, covering the Cenomian/Turonian boundary are related to lithofacies. White coccolith limestones of lower upper Cenomanian age have very low NRM intensities below 0.1 mA m-1. At the base of the Cenomanian/Turonian boundary succession lithofacies changes very distinctly to multicoloured marls and marly limestones. The NRM intensities of these sediments are up to several hundred mA m-1 with a very distinctive intensity peak occurring within the Plenus Bed sequence. The lithofacies change is also reflected in a drastic bulk susceptibility increase. Coercitivity and blocking temperature spectra and IRM acquisition characteristics reveal that the magnetic mineralogy is dominated by minerals of the magnetite group, presumably derived from ash falls.
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