Inverse magnetic susceptibility fabrics in pelagic sediment; Implications for magnetofossil abundance and alignment

Usui, Yoichi*; Yamazaki, Toshitsugu*; Oka, Toshitaka   ; Kumagai Yuho*

We report the discovery of inverse AMS fabrics from pelagic clay recovered by a 12 m long piston core from the western North Pacific. Rock magnetic data and ferromagnetic resonance spectroscopy indicated that magnetofossils account for most of the mean susceptibility regardless of normal or inverse AMS, suggesting that the inverse AMS fabrics due to magnetofossils may be widespread in pelagic clay.