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Compositional tomography of benthic foraminifera microfossils using stimulated Raman microspectroscopy.

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posted on 2018-07-11, 17:38 authored by Asefeh Golreihan, Christian Steuwe, Lineke Woelders, Arne Deprez, Yasuhiko Fujita, Johan Vellekoop, Rudy Swennen, Maarten B. J. Roeffaers

(A) SRS imaging of Nuttallides truempyi at 1092 cm-1. Shown is a maximum projection of a tomography stack of the sample. (B) The SRS spectrum taken at the indicated position (i) in Nuttallides truempyi confirms that Mg calcite is abundant in this sample (data in red, Lorentzian peak fit in black). Tuning the laser off resonance reveals broadly resonant features inside the fossil. Shown here is a scan at an indicated position (ii). (C) An ‘off resonance’ tomography (maximum projection) of Anomalinoides midwayensis is displayed with many absorptive features. (D) Magnified SEM image of the same fossil showing framboidal pyritizations inside the test wall. Scale bars of A and C are 80μm.

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