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Progress in Earth and Planetary Science
Fig. 5 | Progress in Earth and Planetary Science

Fig. 5

From: X-ray fluorescence core scanning, magnetic signatures, and organic geochemistry analyses of Ryukyu Trench sediments: turbidites and hemipelagites

Fig. 5

SQUID-VSM magnetic susceptibility analyses of bulk marine sediments from a, b 209.5 and c, d 66.5 cm depth in PC04 during a, c cooling and b, d warming over temperatures from 5 K to room temperature. Both heating and cooling rates were 3 K/min. The magnetic susceptibility scale (emu) on the left of each plot is reported as ΔM/ΔT on the right. Peaks at 119 K and 34 K indicate the presence of magnetite (mt) and pyrrhotite (po), respectively, in the bulk sediments. Pyrrhotite peaks are observed throughout PL04 and in three turbidite beds in PC04. e Day plot (Day et al. 1977) of hysteresis magnetization and coercivity parameter ratios. The clastic mud beds and silty-sand laminae samples plot in the pseudo-single domain (PSD) and multi-domain (MD) fields, indicating that most of the magnetic particles are uniformly fine-grained

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