Supporting Information
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- Ross Neal
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1 Supporting Information Bindi et al /pnas Fig. S1. Electron microprobe X-ray elemental maps for the grain reported in Fig. 1B. Experimental details are given in Experimental Methods. 1of8
2 Fig. S2. The fragment reported in Fig. 1C. (A) Backscattered electron (BSE) image of the grain, the darker region corresponds to olivine and the lighter region corresponds to icosahedrite (natural quasicrystal). (B) BSE blow up of the region marked with the dashed red line in A. (C) Secondary electron image of the same region given in B. (D) X-ray elemental map for the region given in B, green color indicates Mg and blue color indicates Al. Experimental details are given in Experimental Methods. Fig. S3. Sample of exterior rind material exhibiting calcium-aluminum-rich inclusion-like properties. The left side is a backscattered electron image, and the right side is a composite Ca-Al-Mg X-ray area map of exactly the same region. Ne, nepheline; Ol, olivine; Hed, hedenbergite; Sp, spinel. 2 of 8
3 Fig. S4. Polished slice of the original rock sample. (A) Backscattered electron image of the slice, the darker regions (upper right) correspond to silicates (olivine and clinopyroxene) and the lighter region corresponds to Cu-Al alloys (khatyrkite and cupalite). (B) X-ray elemental map of phosphorous. (C) X-ray elemental map of chromium. (D) X-ray elemental map of nickel. P, Cr, and Ni show a chemical zoning in olivine. Experimental details are given in Experimental Methods. Fig. S5. The stishovite grain reported in Fig. 2. (A) Transmission electron microscopy image of the grain. (B) Selected area diffraction pattern taken down the [001] axis. (C) Selected area diffraction pattern taken down the [010] axis. (D) Selected area diffraction pattern taken down the [0 11] axis. Experimental details are given in Experimental Methods. 3of8
4 Fig. S6. Inclusion of icosahedrite (natural quasicrystal) within the stishovite grain reported in Fig. 2. (A) Transmission electron microscopy image of the grain. (B) Si map; (C) O map; (D) Al map; (E) Cu map; and (F) Fe map. Experimental details are given in Experimental Methods. 4of8
5 Fig. S7. A plot of oxygen three-isotope composition as suggested by Clayton et al. (1) to discriminate terrestrial and extraterrestrial minerals, containing data for four minerals (pyroxene, nepheline, olivine, and spinel) in the meteorite studied here, and compared to concurrent analyses of terrestrial (Burma spinel, San Carlos olivine) and extraterrestrial (Eagle Station olivine) standards. All data are ion probe measurements made with either the Cameca NanoSIMS (large error bars) or the Cameca ims-7f geo (small error bars). The error bars are 2σ. The plotted compositional indices, δ 18 O VSMOW and δ 17 O VSMOW (where VSMOW is Vienna standard mean ocean water), are the difference in 18 O 16 O and 17 O 16 O ratios, respectively, compared to the ratios in VSMOW, expressed in parts per million. Terrestrial minerals fall along the upper gently sloping line [terrestrial fractionation line (TF)]; the oxygen isotope compositions measured for our sample lie along the line corresponding to anhydrous minerals in the CO or CV carbonaceous chondrites (the CCAM). 1 Clayton RN, Onuma N, Mayeda TK (1976) A classification of meteorites based on oxygen isotopes. Earth Planet Sci Lett 30: Table S1. Semiquantitative SEM analyses (in wt % of oxides standard deviations in parentheses) for olivine (red circles) MgO 54.88(1.21) 54.36(1.30) 54.22(1.46) 54.28(1.38) 55.29(1.28) 54.91(1.39) 54.84(1.44) 54.99(1.48) 55.08(1.52) 54.92(1.59) 54.91(1.18) 54.55(1.45) FeO 0.99(0.17) 1.01(0.13) 1.11(0.09) 1.06(0.12) 0.80(0.11) 0.97(0.08) 1.06(0.07) 0.55(0.12) 1.16(0.10) 0.87(0.09) 0.91(0.12) 1.09(0.10) CoO 0.18(0.03) 0.08(0.02) 0.05(0.01) 0.07(0.03) 0.11(0.06) 0.15(0.07) 0.25(0.09) 0.30(0.10) 0.10(0.05) 0.15(0.06) 0.23(0.07) 0.30(0.08) NiO 0.21(0.06) 0.02(0.01) 0.02(0.01) 0.01(0.01) 0.36(0.07) 0.20(0.05) 0.16(0.07) 0.18(0.08) 0.31(0.10) 0.36(0.12) 0.24(0.08) 0.23(0.07) Al 2 O (0.02) 0.10(0.02) 0.04(0.02) 0.08(0.02) 0.05(0.02) 0.11(0.05) 0.11(0.04) 0.12(0.03) 0.07(0.02) 0.11(0.03) 0.15(0.08) 0.09(0.02) Cr 2 O (0.08) 0.90(0.11) 1.21(0.14) 0.94(0.11) 0.33(0.05) 0.31(0.04) 0.27(0.04) 0.25(0.03) 0.27(0.05) 0.34(0.06) 0.28(0.04) 0.34(0.03) SiO (0.98) 42.44(1.02) 42.21(1.06) 42.38(1.11) 42.55(1.20) 42.66(1.18) 42.74(1.07) 42.92(1.22) 42.46(1.18) 42.62(0.99) 42.71(1.04) 42.80(1.29) P 2 O (0.12) 1.09(0.10) 1.14(0.09) 1.18(0.08) 0.51(0.05) 0.69(0.08) 0.57(0.04) 0.69(0.06) 0.55(0.04) 0.63(0.07) 0.57(0.06) 0.60(0.08) Tables S1 S4 show semiquantitative SEM analyses (carried out by means of an EDAX energy-dispersion system) for olivine (red circles), clinopyroxene (blue squares), khatyrkite (green triangles), and cupalite (yellow hexagons) reported in Fig. 1A. Table S2. Semiquantitative SEM analyses (in wt % of oxides standard deviations in parentheses) for clinopyroxene (blue squares) 1 2 CaO 25.02(0.78) 24.99(0.80) Na 2 O 0.45(0.08) 0.50(0.07) MgO 18.39(0.66) 18.31(0.63) FeO 0.39(0.05) 0.41(0.04) Cr 2 O (0.04) 0.28(0.03) SiO (1.65) 55.51(1.54) Table S3. Semiquantitative SEM analyses (in wt % of elements standard deviations in parentheses) for khatyrkite (green triangles) Cu 54.09(1.45) 54.17(1.49) 54.22(1.53) 54.29(1.38) 54.30(1.50) 54.19(1.43) Al 45.89(1.21) 45.81(1.18) 45.74(1.30) 45.69(1.29) 45.70(1.19) 45.79(1.28) Fe 0.02(0.01) 0.02(0.01) 0.04(0.01) 0.02(0.01) 0.00(0.01) 0.02(0.01) Table S4. Semiquantitative SEM analyses (in wt % of elements standard deviations in parentheses) for cupalite (yellow hexagons) Cu 70.14(1.89) 70.22(1.76) 70.08(1.93) 70.19(1.96) 70.25(1.70) 70.26(1.69) 70.22(1.81) Al 29.84(0.83) 29.76(0.77) 29.88(0.86) 29.77(0.75) 29.74(0.81) 29.74(0.78) 29.75(0.80) Fe 0.02(0.01) 0.02(0.01) 0.04(0.01) 0.04(0.01) 0.01(0.01) 0.00(0.01) 0.03(0.01) 5of8
6 Table S5. Electron microprobe analyses (in wt % of elements) for icosahedrite in Fig. 1B Mg b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Al 44.91(0.45) 45.11(0.42) 45.10(0.38) 45.12(0.32) 45.19(0.43) 45.21(0.37) 44.89(0.36) 45.11(0.40) 45.22(0.33) 45.30(0.38) 45.01(0.35) Si 0.10(0.02) 0.09(0.02) 0.10(0.02) 0.09(0.02) 0.08(0.02) 0.10(0.02) 0.18(0.03) 0.06(0.01) 0.07(0.02) 0.15(0.03) 0.15(0.03) P 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.01(0.01) 0.02(0.01) 0.02(0.01) 0.00(0.01) Cl b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ca b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Cr 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) Fe 17.20(0.18) 17.30(0.20) 17.25(0.16) 17.17(0.15) 17.31(0.19) 17.25(0.18) 17.29(0.17) 17.17(0.18) 17.31(0.20) 17.26(0.16) 17.41(0.21) Co b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ni 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.03(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) Cu 37.51(0.29) 37.57(0.31) 37.40(0.27) 37.46(0.28) 37.51(0.29) 37.47(0.26) 37.56(0.31) 37.46(0.27) 37.57(0.29) 37.40(0.25) 37.49(0.28) Zn 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.00(0.01) 0.03(0.01) 0.02(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) S b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Total Mg b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Al 44.88(0.38) 45.11(0.42) 45.28(0.30) 45.00(0.39) 45.17(0.35) 45.08(0.29) 45.11(0.37) 44.97(0.34) 45.12(0.37) 45.20(0.31) Si 0.11(0.02) 0.07(0.02) 0.08(0.02) 0.11(0.02) 0.08(0.02) 0.12(0.02) 0.16(0.03) 0.14(0.02) 0.09(0.02) 0.10(0.02) P 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) Cl b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ca b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Cr b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Fe 17.36(0.10) 17.25(0.12) 17.26(0.11) 17.21(0.13) 17.23(0.10) 17.30(0.12) 17.35(0.11) 17.20(0.10) 17.16(0.09) 17.18(0.11) Co b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ni 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Cu 37.59(0.25) 37.51(0.28) 37.39(0.29) 37.55(0.27) 37.50(0.31) 37.44(0.33) 37.48(0.27) 37.50(0.30) 37.57(0.32) 37.41(0.28) Zn 0.00(0.01) 0.00(0.01) 0.03(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) S b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Total Mg b.d.l. 0.03(0.01) 0.00(0.01) 0.05(0.01) 0.06(0.01) 0.00(0.01) 0.05(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Al 45.06(0.35) 44.60(0.42) 45.10(0.40) 45.32(0.37) 45.22(0.49) 44.78(0.44) 44.31(0.35) 45.21(0.38) 45.11(0.40) 45.18(0.43) Si 0.12(0.02) 0.15(0.03) 0.13(0.02) 0.16(0.02) 0.18(0.03) 0.19(0.03) 0.17(0.02) 0.10(0.02) 0.12(0.02) 0.13(0.02) P 0.01(0.01) 0.09(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) Cl b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ca b.d.l. 0.05(0.01) 0.00(0.01) 0.04(0.01) 0.08(0.02) 0.00(0.01) 0.07(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Cr b.d.l. 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Fe 17.23(0.10) 17.25(0.11) 17.20(0.10) 17.15(0.12) 17.15(0.09) 17.30(0.11) 17.20(0.10) 17.28(0.13) 17.33(0.12) 17.28(0.11) Co b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Ni 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Cu 37.39(0.26) 37.49(0.25) 37.53(0.26) 37.40(0.28) 37.41(0.31) 37.38(0.23) 37.40(0.28) 37.55(0.29) 37.49(0.31) 37.50(0.26) Zn 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) S b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. b.d.l. Total Below detection limit, b.d.l. 6of8
7 Table S6. Electron microprobe analyses (in wt % of oxides) for clinopyroxene in Fig. 1B SiO (0.55) 55.46(0.52) 54.99(0.50) 55.00(0.58) 55.30(0.49) 55.48(0.51) 55.40(0.57) 55.31(0.55) 55.50(0.54) TiO (0.01) 0.01(0.01) 0.01(0.01) 0.04(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) Al 2 O (0.01) 0.00(0.01) 0.00(0.01) 0.07(0.01) 0.01(0.01) 0.08(0.01) 0.01(0.01) 0.01(0.01) 0.08(0.02) Cr 2 O (0.04) 0.28(0.04) 0.27(0.03) 0.36(0.05) 0.27(0.04) 0.22(0.04) 0.35(0.04) 0.30(0.05) 0.28(0.04) FeO 0.41(0.04) 0.29(0.04) 0.31(0.04) 0.48(0.05) 0.29(0.04) 0.55(0.05) 0.27(0.04) 0.22(0.04) 0.54(0.05) MnO 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) MgO 18.44(0.13) 18.30(0.15) 18.33(0.14) 18.40(0.13) 18.38(0.11) 18.29(0.10) 18.43(0.12) 18.36(0.13) 18.46(0.12) CaO 24.99(0.19) 25.11(0.21) 25.16(0.23) 24.95(0.17) 25.11(0.19) 25.08(0.18) 25.19(0.20) 25.22(0.22) 24.98(0.21) Na 2 O 0.40(0.04) 0.51(0.04) 0.53(0.04) 0.32(0.03) 0.55(0.04) 0.60(0.05) 0.43(0.04) 0.28(0.04) 0.56(0.05) P 2 O (0.01) 0.02(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.02(0.01) CuO 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.05(0.01) 0.00(0.01) 0.07(0.02) 0.00(0.01) 0.00(0.01) 0.06(0.01) CoO 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) NiO 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.02(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) Total SiO (0.57) 55.11(0.55) 55.10(0.48) 55.38(0.52) 55.27(0.53) 54.77(0.56) 55.00(0.50) 55.21(0.45) 54.97(0.52) 55.11(0.50) TiO (0.01) 0.02(0.01) 0.02(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.01(0.01) 0.02(0.01) 0.01(0.01) 0.01(0.01) Al 2 O (0.01) 0.01(0.01) 0.06(0.01) 0.09(0.01) 0.01(0.01) 0.01(0.01) 0.02(0.01) 0.07(0.01) 0.01(0.01) 0.01(0.01) Cr 2 O (0.03) 0.27(0.04) 0.24(0.04) 0.32(0.04) 0.31(0.04) 0.17(0.03) 0.23(0.04) 0.23(0.04) 0.27(0.04) 0.30(0.04) FeO 0.30(0.04) 0.27(0.04) 0.50(0.05) 0.62(0.05) 0.33(0.04) 0.33(0.04) 0.25(0.04) 0.44(0.04) 0.20(0.03) 0.19(0.03) MnO 0.00(0.01) 0.00(0.01) 0.02(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.01(0.01) MgO 18.45(0.11) 18.40(0.15) 18.35(0.13) 18.27(0.17) 18.23(0.18) 18.40(0.15) 18.36(0.18) 18.29(0.16) 18.41(0.17) 18.31(0.15) CaO 25.19(0.17) 24.90(0.21) 24.91(0.23) 25.07(0.18) 25.21(0.22) 25.10(0.21) 25.02(0.24) 24.88(0.21) 24.97(0.23) 25.02(0.19) Na 2 O 0.50(0.04) 0.36(0.04) 0.50(0.05) 0.30(0.04) 0.41(0.04) 0.43(0.04) 0.30(0.04) 0.33(0.04) 0.41(0.04) 0.38(0.04) P 2 O (0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) CuO 0.00(0.01) 0.00(0.01) 0.09(0.02) 0.11(0.02) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.09(0.02) 0.00(0.01) 0.00(0.01) CoO 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) NiO 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) Total SiO (0.53) 55.41(0.55) 55.21(0.50) 55.00(0.47) 54.95(0.53) 55.56(0.55) 55.22(0.57) 55.34(0.44) 54.96(0.47) TiO (0.01) 0.01(0.01) 0.00(0.01) 0.02(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.03(0.01) 0.01(0.01) Al 2 O (0.01) 0.01(0.01) 0.02(0.01) 0.00(0.01) 0.01(0.01) 0.08(0.02) 0.00(0.01) 0.01(0.01) 0.01(0.01) Cr 2 O (0.04) 0.24(0.04) 0.23(0.04) 0.20(0.04) 0.30(0.04) 0.15(0.03) 0.28(0.04) 0.25(0.04) 0.31(0.04) FeO 0.30(0.04) 0.41(0.04) 0.33(0.04) 0.46(0.04) 0.38(0.04) 0.57(0.05) 0.40(0.04) 0.44(0.04) 0.36(0.04) MnO 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) MgO 18.27(0.18) 18.34(0.15) 18.39(0.17) 18.44(0.18) 18.48(0.15) 18.34(0.16) 18.45(0.15) 18.49(0.17) 18.39(0.18) CaO 25.10(0.21) 24.94(0.21) 25.11(0.20) 24.89(0.18) 24.93(0.19) 25.00(0.23) 25.18(0.22) 24.99(0.21) 25.12(0.18) Na 2 O 0.40(0.04) 0.45(0.05) 0.37(0.04) 0.40(0.04) 0.30(0.04) 0.40(0.04) 0.38(0.04) 0.38(0.04) 0.29(0.04) P 2 O (0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) CuO 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.09(0.02) 0.00(0.01) 0.07(0.02) 0.01(0.01) 0.00(0.01) 0.00(0.01) CoO 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) NiO 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.00(0.01) 0.01(0.01) 0.01(0.01) 0.00(0.01) 0.00(0.01) Total Table S7. Electron microprobe analyses for the grain (consisting of olivine and icosahedrite) reported in Fig. 1C. Icosahedrite (wt % of elements) Al 43.13(0.33) 43.38(0.31) 43.22(0.29) 43.32(0.27) 43.10(0.34) 43.17(0.30) 43.22(0.33) 43.19(0.31) 43.44(0.34) 43.28(0.33) Cu 38.70(0.26) 38.55(0.24) 38.45(0.28) 38.65(0.26) 38.50(0.27) 38.48(0.26) 38.55(0.28) 38.66(0.30) 38.33(0.25) 38.31(0.26) Fe 18.09(0.11) 18.20(0.10) 18.14(0.08) 18.11(0.09) 18.19(0.11) 18.21(0.12) 18.18(0.10) 18.25(0.11) 18.30(0.10) 18.26(0.09) Total of8
8 Table S8. Electron microprobe analyses for the grain (consisting of olivine and icosahedrite) reported in Fig. 1C. Olivine (wt % of oxides) CaO 0.32(0.04) 0.28(0.04) 0.34(0.04) 0.36(0.04) 0.27(0.04) 0.30(0.04) 0.31(0.04) 0.29(0.04) 0.33(0.04) MgO 55.27(0.52) 55.32(0.49) 55.25(0.55) 55.30(0.51) 55.40(0.55) 55.19(0.50) 55.29(0.49) 55.35(0.57) 55.21(0.56) FeO 2.07(0.06) 2.01(0.05) 2.05(0.05) 1.99(0.06) 2.10(0.06) 2.13(0.06) 2.05(0.05) 1.99(0.06) 2.16(0.06) SiO (0.32) 42.31(0.29) 42.30(0.34) 42.34(0.36) 42.30(0.35) 42.34(0.29) 42.36(0.35) 42.34(0.32) 42.40(0.33) Total CaO 0.32(0.04) 0.29(0.04) 0.32(0.04) 0.30(0.04) 0.31(0.04) 0.37(0.04) 0.33(0.04) 0.36(0.04) 0.24(0.04) 0.30(0.04) MgO 55.30(0.53) 55.26(0.49) 55.37(0.53) 55.21(0.52) 55.32(0.51) 55.45(0.52) 55.10(0.50) 55.27(0.56) 55.31(0.48) 55.28(0.52) FeO 2.05(0.05) 2.01(0.06) 1.98(0.06) 2.03(0.06) 1.96(0.05) 2.08(0.06) 2.11(0.06) 2.05(0.06) 1.95(0.06) 2.12(0.05) SiO (0.31) 42.36(0.31) 42.31(0.35) 42.41(0.28) 42.31(0.31) 42.19(0.30) 42.44(0.32) 42.34(0.34) 42.45(0.35) 42.29(0.28) Total of8
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