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Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 4 | Geoscience Letters

Fig. 4

From: Hematite (α-Fe2O3) quantification in sedimentary magnetism: limitations of existing proxies and ways forward

Fig. 4

First derivative of IRM acquisition (gradient) curves and hematite components for 7-T maximum applied fields. Results for hematite pigments in a decorative ‘print stone’ from the Mount McRae Shale Formation, Western Australia (Abrajevitch et al. 2014): a hematite print stone pigment (sample pps11) and b uniform pigment (sample TOM07). Results from Abrajevitch et al. (2015) for: c Paleogene limestone 21 cm above the K–Pg boundary at Bottaccione Gorge, Italy, and d limestone 46.5 cm below the boundary. Abrajevitch et al. (2015) identified five components; for clarity, only the hematite (labelled H) component of interest here is shown. Dashed vertical lines represent the 300-mT cut-off field

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