Fig. 2

BSE images of ringwoodite lamellae. a shock-induced melt pocket (SMP) outlined by the dotted line. The grain labeled “b” and the white box labeled “d” are shown in b and d, respectively. b High magnification image of grain “b”, showing significant heterogeneity. Raman analyses were conducted on the adjacent pyroxene (#2 px-gl) and on the lamellae (R3). c Enlarged image of white box “c” in b reveals ringwoodite (Rwt) lamellae intergrown with the host olivine (Ol). R1, R2, and R4 are the analyses positions of Raman spectra. The yellow box indicates the position of FIB-slice #1. d Enlarged image of white box “d” in a shows that the olivine in contact with the glass phase (Gl) has been transformed into ringwoodite lamellae. e Bright-field (BF) TEM image from the FIB-slice #1. The lamellae parallel to each other. f Enlarged BF-TEM image of the white box “f” in e. The SAED pattern of region 1 shows olivine viewed along the crystal zone axis [01 \(\overline{3 }\)]. The SAED pattern of region 2 shows that crystallographic relationship {111}_Rwt//(100)_Ol exist. SMP shock-induced melt pocket, Ap apatite; others are the same as above