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Progress in Earth and Planetary Science
Fig. 2 | Progress in Earth and Planetary Science

Fig. 2

From: FTIR microspectroscopy of carbonaceous matter in ~ 3.5 Ga seafloor hydrothermal deposits in the North Pole area, Western Australia

Fig. 2

Optical photomicrographs of the analyzed thin sections. a–g Plane-polarized light photomicrographs of the thin section 96NP452. b Composite image of the photomicrographs; the dashed rectangle in b corresponds to the area shown in Fig. 3a. f Enlarged view of the dashed rectangle in e. h Cross-polarized light photomicrograph of the same area in g. i, j Plane-polarized light photomicrographs of the thin section T-58. i Composite image of the photomicrographs. j Enlarged view of the dashed rectangle in i. The locations (50 × 50 μm2 dotted squares) of the 12 clots with satisfactory signal/noise ratios and their calculated R3/2 ratios (1024 scans) are shown in a–d, f, g, j

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