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Earth, Planets and Space
Fig. 9 | Earth, Planets and Space

Fig. 9

From: Volcanic ash in bare ice south of Sør Rondane Mountains, Antarctica: geochemistry, rock magnetism and nondestructive magnetic detection with SQUID gradiometer

Fig. 9

a Day plot for this study (solid circles, which is basically the same as Fig. 5d. Colored symbols are from Day et al. (1977) for pure magnetite (open blue circles), TM20 (solid green circles), TM40 (solid red circles) and TM60 (open purple circles). Thick (thin) black curve is theoretical mixing line of SD and MD magnetite by Dunlop (2002b) for case 2 and case 3 in his Fig. 2. Numbers on the sides of red circles are size of particles prepared by Day et al. (1977) for TM40. Thick broken line is a mixing curve of SD and MD titanomagnetite with TM60 composition (a curve in Figure 10 of Dunlop 2002a). b M rs/M s versus H c plot proposed by Wang and Van der Voo (2004). Symbols are the same as Fig. 9a. Broken line is the fit through the origin for the data in this study (solid circles)

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