Extended Data Fig. 2: Fe-oxide and silicate inclusions in BGS detrital zircons.
From: Hadaean to Palaeoarchaean stagnant-lid tectonics revealed by zircon magnetism
a, SEM BSD image of zircon BGS2-z51 highlighting melt inclusions discussed (b,f,d); entire grain shown as inset with 50-μm scale bar. b, Higher-magnification SEM BSD image of feldspar inclusion b. EDS analysis location highlighted. c, EDS spectra of inclusion b. d, Higher-magnification SEM BSD image of multicomponent inclusion partially disrupted by polishing. EDS analysis location highlighted. e, EDS spectra from d suggesting a feldspar composition. f, Higher-magnification SEM BSD image of inclusion f (see Fig. 1 showing extinction with 90° change in polarization) showing EDS analysis locations. This inclusion may be partially disrupted by polishing. g, EDS spectra of main grain in f highlighting strong Fe signal. Al may be from adjacent feldspar (see h). h, EDS of small grain in f showing spectra compatible with feldspar. i, Reflected-light microscopy image (100×) of zircon BGS2-z50. j, Reflected-light images (1,000× oil immersion) at 0° (top) and 90° (bottom) polarization showing extinction of Fe-oxide inclusion (magnetite) at depth (see Fig. 1). k, Reflected-light image of zircon BGS5-z36 (see Fig. 1). l, SEM BSD image of BGS5-z36. Fe particles shown in Fig. 1 are approximately 2 μm from the grain edge (also see ‘Microtectonic analyses of zircons’ section in Methods).
