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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Characterization of marine ferromanganese crust from the Pacific using residues of selective chemical leaching: identification of fossil magnetotactic bacteria with FE-SEM and rock magnetic methods

Fig. 2

a Results of XRD analyses measured on ~ 3 mm chip taken from polished section shown as photographic images on the left. Horizontal scale for each mineral show count per second (cps) value for a characteristic peak of each mineral. b Distribution of Mn, Ni, and Fe (from left to right) based on XRF analysis on another polished section shown as photographic images on the left. c Diagrams summarizing chemical leaching experiments. From left to right, age model based on 10Be chronology, photograph of a polished section, units classified based on visual observations, optical microscopy and XRD analysis, observed materials within the residue, and fractions of each size within the residues. Observations for Fig. 3c were conducted using the material on 6-µm mesh sieve. ‘Biogenic particles’ in the observed materials column represents unidentified partially dissolved apatite particles considered to be originated from fossils. Residual fraction shows weight percentage of each size fraction obtained after chemical leaching of starting material (0.5 g)

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