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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

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

Fig. 4

Backscattered electron images (BEIs) of volcanic ash particles extracted from tephra-bearing ice block samples collected from Sites a JARE54-ASH1 and b JARE54-ASH3. BB bubble, GL glass, MT titanomagnetite, PL plagioclase, PX pyroxene. c Harker diagram of K2O for volcanic glass. Black solid circles are data from this study, white circles are data from Naraoka et al. (1991), and gray solid circles are from Narcisi et al. (2005). Boundary of low-K, medium-K and high-K is from Gill (1981). d Histogram of ulvospinel content for the analyzed titanomagnetite grains

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