Fig. 1
From: Abiotic polycyclic aromatic hydrocarbons originating from the sub-oceanic mantle
(a) Photomicrograph of the host Cpx grain in thin section “H3–001_TK.” The white rectangle indicates the area shown in (b). (b) Magnified image of the host Cpx grain. The white-dotted rectangles indicate regions from which samples for detailed analyses were extracted using a focused ion beam (FIB). The numbers adjacent to the rectangles indicate the sample numbers. PGMs-containing inclusions were observed only in the Cpx grain. Three samples were extracted to ensure that these inclusions were included. (c) 3D view of sample #01, shown as a representative block sample analysed in this study. The image was reconstructed from X-ray nano-computed tomography data. White-dotted lines indicate the portion of sample #01 previously extracted for transmission electron microscopy (TEM) analyses [15]. (d) Cross-sectional image obtained by X-ray nano-computed tomography. Abbreviations: Ol = olivine; Opx = orthopyroxene; Cpx = clinopyroxene; PGM = platinum-group minerals; BMS = base metal sulphides; STXM–XANES = X-ray absorption near-edge spectroscopy combined with scanning transmission X-ray microscopy.
