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Oxygen isotope composition of main-group pallasites and mesosiderites. Data for main-group pallasites and mesosiderites from Greenwood et al. (2006). Solid lines through data points show the mean Δ17O value for each group. Grey-shaded boxes depict the 2σ error on the mesosiderite and main-group pallasite population Δ17O and δ18O mean values. Open squares are individual mesosiderite analyses, open circles individual pallasite analyses. The dashed line labelled (1) is the eucrite fractionation line of Greenwood et al. (2005); the dashed line labelled (2) shows the range of HED values obtained by Weichert et al. (2004). Δ17O is linearized using the format of Miller (2002): Δ17O = 1000 ln (1+ (δ17O/1000)) – λ1000 ln (1+ ( δ18O/1000)) where λ = 0.5247. TFL = Terrestrial Fractionation Line. |
δ18O | δ17O | Δ17O: given | Δ17O: Miller (2002) | Comment |
---|---|---|---|---|
4.5500 | 2.1300 | -0.2600 | -0.257 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Northwest Africa 4418 | Mesosiderite | 4.5240 | 2.1450 | -0.228 | -0.03 | 0.02 | 0.03 |
Northwest Africa 2904 | Eucrite-pmict | 4.5800 | 2.1600 | -0.242 | 0.03 | 0.03 | 0.01 |
El Médano 395 | Brachinite | 4.5820 | 2.1700 | -0.233 | 0.03 | 0.04 | 0.02 |
Northwest Africa 4882 | Brachinite | 4.4550 | 2.0950 | -0.242 | -0.09 | -0.03 | 0.01 |
Northwest Africa 4882 | Brachinite | 4.4550 | 2.0950 | -0.242 | -0.09 | -0.03 | 0.01 |
Northwest Africa 6152 | Brachinite | 4.6500 | 2.2300 | -0.209 | 0.1 | 0.1 | 0.05 |
Northwest Africa 6152 | Brachinite | 4.6500 | 2.2400 | -0.199 | 0.1 | 0.11 | 0.06 |
Northwest Africa 10497 | Brachinite | 4.6700 | 2.2200 | -0.229 | 0.12 | 0.09 | 0.03 |
Northwest Africa 4395 | Diogenite | 4.3900 | 2.0900 | -0.213 | -0.16 | -0.04 | 0.04 |
Northwest Africa 12004 | Angrite | 4.4400 | 2.2580 | -0.071 | -0.11 | 0.13 | 0.19 |
Northwest Africa 7025 | Mesosiderite | 4.3870 | 2.0820 | -0.219 | -0.16 | -0.05 | 0.04 |
Northwest Africa 10423 | Eucrite-cm | 4.6900 | 2.2300 | -0.23 | 0.14 | 0.1 | 0.03 |
Northwest Africa 4636 | Mesosiderite | 4.3800 | 2.0900 | -0.208 | -0.17 | -0.04 | 0.05 |
Allan Hills 12073 | Eucrite | 4.4000 | 2.0400 | -0.268 | -0.15 | -0.09 | -0.01 |
Northwest Africa 8659 | Eucrite | 4.3760 | 2.0830 | -0.212 | -0.17 | -0.05 | 0.04 |
Northwest Africa 8059 | LL3.05 | 4.7020 | 2.2280 | -0.238 | 0.15 | 0.1 | 0.02 |
Ramlat as Sahmah 309 | Brachinite | 4.3700 | 2.0900 | -0.202 | -0.18 | -0.04 | 0.05 |
Northwest Africa 2904 | Eucrite-pmict | 4.7400 | 2.1300 | -0.356 | 0.19 | 0 | -0.1 |
Northwest Africa 12320 | Angrite | 4.4160 | 2.2680 | -0.049 | -0.13 | 0.14 | 0.21 |
Northwest Africa 4882 | Brachinite | 4.3680 | 2.0640 | -0.227 | -0.18 | -0.07 | 0.03 |
Northwest Africa 4882 | Brachinite | 4.3680 | 2.0640 | -0.227 | -0.18 | -0.07 | 0.03 |
Northwest Africa 12004 | Angrite | 4.4310 | 2.2850 | -0.04 | -0.12 | 0.16 | 0.22 |
Northwest Africa 4872 | Brachinite | 4.3540 | 2.0610 | -0.223 | -0.2 | -0.07 | 0.03 |
Northwest Africa 4872 | Brachinite | 4.3540 | 2.0610 | -0.223 | -0.2 | -0.07 | 0.03 |
Northwest Africa 12320 | Angrite | 4.4070 | 2.2810 | -0.031 | -0.14 | 0.15 | 0.23 |
Northwest Africa 12320 | Angrite | 4.5450 | 2.3390 | -0.045 | -0 | 0.21 | 0.21 |
Los Vientos 263 | Pallasite, ungrouped | 4.3400 | 2.0900 | -0.187 | -0.21 | -0.04 | 0.07 |
Northwest Africa 12951 | Winonaite | 4.7300 | 1.9690 | -0.511 | 0.18 | -0.16 | -0.25 |
Northwest Africa 7904 | Brachinite | 4.7810 | 2.2100 | -0.297 | 0.23 | 0.08 | -0.04 |
Northwest Africa 5400 | Achondrite-ung | 4.4860 | 2.3670 | 0.013 | -0.06 | 0.24 | 0.27 |
Northwest Africa 11917 | Winonaite | 4.5410 | 1.8760 | -0.505 | -0.01 | -0.25 | -0.25 |
Al Huwaysah 010 | Achondrite-ung | 4.7300 | 2.3100 | -0.171 | 0.18 | 0.18 | 0.09 |
Northwest Africa 12397 | Mesosiderite | 4.3230 | 1.9920 | -0.276 | -0.23 | -0.14 | -0.02 |
Northwest Africa 4872 | Brachinite | 4.3080 | 2.0120 | -0.248 | -0.24 | -0.12 | 0.01 |
Northwest Africa 4872 | Brachinite | 4.3080 | 2.0120 | -0.248 | -0.24 | -0.12 | 0.01 |
Northwest Africa 12543 | Winonaite | 4.6620 | 1.8800 | -0.565 | 0.11 | -0.25 | -0.31 |
Northwest Africa 12004 | Angrite | 4.2840 | 2.1970 | -0.051 | -0.27 | 0.07 | 0.21 |
Northwest Africa 8173 | Enst achon | 4.6000 | 2.4000 | -0.013 | 0.05 | 0.27 | 0.24 |
El Médano 395 | Brachinite | 4.2900 | 2.0200 | -0.23 | -0.26 | -0.11 | 0.03 |
Northwest Africa 6292 | Achondrite-ung | 4.5500 | 2.4200 | 0.033 | 0 | 0.29 | 0.29 |
Zag (b) | Winonaite | 4.8400 | 2.0600 | -0.478 | 0.29 | -0.07 | -0.22 |
Northwest Africa 6023 | Brachinite-an | 4.8380 | 2.2690 | -0.268 | 0.29 | 0.14 | -0.01 |
Northwest Africa 6474 | Brachinite | 4.2340 | 2.1810 | -0.04 | -0.32 | 0.05 | 0.22 |
Northwest Africa 13432 | Winonaite | 4.8550 | 2.0160 | -0.53 | 0.31 | -0.11 | -0.27 |
Northwest Africa 12951 | Winonaite | 4.8870 | 2.0490 | -0.513 | 0.34 | -0.08 | -0.26 |
Jiddat al Harasis 395 | Diogenite | 4.2300 | 1.9900 | -0.229 | -0.32 | -0.14 | 0.03 |
Thiel Mountains 07009 | EL6 | 4.2100 | 2.2100 | 0.001 | -0.34 | 0.08 | 0.26 |
Acfer 366 | CH3 | 4.6100 | 1.7810 | -0.636 | 0.06 | -0.35 | -0.38 |
Northwest Africa 7605 | Brachinite | 4.8220 | 2.3700 | -0.159 | 0.27 | 0.24 | 0.1 |
Northwest Africa 10637 | Brachinite | 4.7940 | 2.4050 | -0.11 | 0.24 | 0.28 | 0.15 |
Northwest Africa 5363 | Achondrite-ung | 4.1830 | 2.1520 | -0.043 | -0.37 | 0.02 | 0.21 |
Old Homestead 003 | Howardite | 4.8800 | 2.3000 | -0.259 | 0.33 | 0.17 | -0 |
Northwest Africa 2999 | Angrite | 4.1540 | 2.0950 | -0.084 | -0.4 | -0.03 | 0.17 |
El Médano 395 | Brachinite | 4.8970 | 2.3290 | -0.239 | 0.35 | 0.2 | 0.02 |
Dhofar 378 | Martian (shergottite) | 4.4600 | 2.5200 | 0.18 | -0.09 | 0.39 | 0.44 |
Northwest Africa 8686 | Martian (shergottite) | 4.4170 | 2.5110 | 0.193 | -0.13 | 0.38 | 0.45 |
Northwest Africa 6690 | Diogenite | 4.1900 | 1.9400 | -0.258 | -0.36 | -0.19 | -0 |
Northwest Africa 4937 | Winonaite | 4.3700 | 1.7630 | -0.529 | -0.18 | -0.37 | -0.27 |
Northwest Africa 10424 | Eucrite-cm | 4.1800 | 1.9500 | -0.243 | -0.37 | -0.18 | 0.01 |
Northwest Africa 12338 | Achondrite-ung | 4.1600 | 1.9800 | -0.202 | -0.39 | -0.15 | 0.05 |
Northwest Africa 11729 | Eucrite-an | 4.9340 | 2.3010 | -0.287 | 0.38 | 0.17 | -0.03 |
Northwest Africa 3151 | Brachinite | 4.8600 | 2.4200 | -0.129 | 0.31 | 0.29 | 0.13 |
Northwest Africa 7025 | Mesosiderite | 4.1490 | 1.9610 | -0.215 | -0.4 | -0.17 | 0.04 |
Northwest Africa 10416 | Martian | 4.3100 | 2.5000 | 0.238 | -0.24 | 0.37 | 0.49 |
Northwest Africa 739 | CH3 | 4.3200 | 1.7500 | -0.516 | -0.23 | -0.38 | -0.26 |
Northwest Africa 5718 | Martian (shergottite) | 4.2900 | 2.5000 | 0.249 | -0.26 | 0.37 | 0.51 |
Northwest Africa 6963 | Martian (shergottite) | 4.3320 | 2.5280 | 0.255 | -0.22 | 0.4 | 0.51 |
Northwest Africa 12522 | Martian (shergottite) | 4.4260 | 2.5670 | 0.244 | -0.12 | 0.44 | 0.5 |
Northwest Africa 10593 | Martian (shergottite) | 4.4840 | 2.5820 | 0.229 | -0.07 | 0.45 | 0.49 |
Northwest Africa 10602 | Eucrite-melt breccia | 4.9520 | 2.3490 | -0.248 | 0.4 | 0.22 | 0.01 |
Northwest Africa 13355 | Eucrite-an | 4.1570 | 1.8950 | -0.286 | -0.39 | -0.24 | -0.03 |
Yamato 980459 | Martian (shergottite) | 4.3100 | 2.5200 | 0.258 | -0.24 | 0.39 | 0.51 |
Yamato 980459 | Martian (shergottite) | 4.3100 | 2.5200 | 0.258 | -0.24 | 0.39 | 0.51 |
Sayh al Uhaymir 094 | Martian (shergottite) | 4.2900 | 2.5100 | 0.259 | -0.26 | 0.38 | 0.52 |
Northwest Africa 2986 | Martian (shergottite) | 4.4500 | 2.5800 | 0.245 | -0.1 | 0.45 | 0.5 |
Northwest Africa 2999 | Angrite | 4.0930 | 2.0540 | -0.093 | -0.46 | -0.08 | 0.16 |
Northwest Africa 7032 | Martian (shergottite) | 4.4230 | 2.5770 | 0.256 | -0.13 | 0.45 | 0.51 |
Northwest Africa 11264 | Eucrite | 4.1300 | 1.9300 | -0.236 | -0.42 | -0.2 | 0.02 |
Northwest Africa 8124 | LL3 | 4.7180 | 2.5680 | 0.093 | 0.17 | 0.44 | 0.35 |
Northwest Africa 10416 | Martian | 4.3920 | 2.5730 | 0.268 | -0.16 | 0.44 | 0.52 |
Northwest Africa 10153 | Martian (nakhlite) | 4.4460 | 2.5910 | 0.258 | -0.1 | 0.46 | 0.51 |
Northwest Africa 5718 | Martian (shergottite) | 4.4700 | 2.6000 | 0.254 | -0.08 | 0.47 | 0.51 |
Northwest Africa 10593 | Martian (shergottite) | 4.3730 | 2.5760 | 0.281 | -0.18 | 0.45 | 0.54 |
Northwest Africa 5990 | Martian (shergottite) | 4.2100 | 2.4700 | 0.261 | -0.34 | 0.34 | 0.52 |
Northwest Africa 12540 | Eucrite-an | 4.1200 | 1.9090 | -0.252 | -0.43 | -0.22 | 0 |
Northwest Africa 12951 | Winonaite | 5.0350 | 2.1190 | -0.521 | 0.49 | -0.01 | -0.26 |
Northwest Africa 8656 | Martian (shergottite) | 4.2760 | 2.5340 | 0.29 | -0.27 | 0.4 | 0.55 |
Northwest Africa 5990 | Martian (shergottite) | 4.1500 | 2.4100 | 0.232 | -0.4 | 0.28 | 0.49 |
Northwest Africa 7812 | Angrite | 4.0680 | 2.0510 | -0.083 | -0.48 | -0.08 | 0.17 |
Northwest Africa 2627 | Acapulcoite | 4.9300 | 1.8200 | -0.765 | 0.38 | -0.31 | -0.51 |
Northwest Africa 6484 | Lodranite | 4.5420 | 1.6350 | -0.746 | -0.01 | -0.5 | -0.49 |
Northwest Africa 13457 | Eucrite | 4.1250 | 1.8750 | -0.289 | -0.43 | -0.26 | -0.03 |