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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 |
---|---|---|---|---|
4.5240 | 2.1450 | -0.2070 | -0.228 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Northwest Africa 3213 | Mesosiderite | 4.5500 | 2.1300 | -0.257 | 0.03 | -0.02 | -0.03 |
Northwest Africa 14717 | Eucrite-unbr | 4.5710 | 2.1460 | -0.252 | 0.05 | 0 | -0.02 |
Northwest Africa 2904 | Eucrite-pmict | 4.5800 | 2.1600 | -0.242 | 0.06 | 0.02 | -0.01 |
El Médano 395 | Brachinite | 4.5820 | 2.1700 | -0.233 | 0.06 | 0.02 | -0.01 |
Northwest Africa 4882 | Brachinite | 4.4550 | 2.0950 | -0.242 | -0.07 | -0.05 | -0.01 |
Northwest Africa 4882 | Brachinite | 4.4550 | 2.0950 | -0.242 | -0.07 | -0.05 | -0.01 |
Northwest Africa 15861 | Angrite | 4.4790 | 2.2190 | -0.131 | -0.04 | 0.07 | 0.1 |
Pecora Escarpment 91461 | EH3 | 4.5270 | 2.0570 | -0.317 | 0 | -0.09 | -0.09 |
Northwest Africa 15317 | Angrite | 4.5290 | 2.2830 | -0.093 | 0 | 0.14 | 0.14 |
Northwest Africa 14717 | Eucrite-unbr | 4.4180 | 2.0530 | -0.264 | -0.11 | -0.09 | -0.04 |
Northwest Africa 12004 | Angrite | 4.4400 | 2.2580 | -0.071 | -0.08 | 0.11 | 0.16 |
Northwest Africa 4395 | Diogenite | 4.3900 | 2.0900 | -0.213 | -0.13 | -0.06 | 0.02 |
Northwest Africa 7025 | Mesosiderite | 4.3870 | 2.0820 | -0.219 | -0.14 | -0.06 | 0.01 |
Northwest Africa 6152 | Brachinite | 4.6500 | 2.2300 | -0.209 | 0.13 | 0.09 | 0.02 |
Northwest Africa 4636 | Mesosiderite | 4.3800 | 2.0900 | -0.208 | -0.14 | -0.06 | 0.02 |
Allan Hills 84206 | EH3 | 4.4230 | 2.2630 | -0.057 | -0.1 | 0.12 | 0.17 |
Northwest Africa 6152 | Brachinite | 4.6500 | 2.2400 | -0.199 | 0.13 | 0.1 | 0.03 |
Northwest Africa 8659 | Eucrite | 4.3760 | 2.0830 | -0.212 | -0.15 | -0.06 | 0.02 |
Allan Hills 12073 | Eucrite | 4.4000 | 2.0400 | -0.268 | -0.12 | -0.11 | -0.04 |
Ramlat as Sahmah 309 | Brachinite | 4.3700 | 2.0900 | -0.202 | -0.15 | -0.06 | 0.03 |
Northwest Africa 12320 | Angrite | 4.4160 | 2.2680 | -0.049 | -0.11 | 0.12 | 0.18 |
Northwest Africa 10497 | Brachinite | 4.6700 | 2.2200 | -0.229 | 0.15 | 0.08 | -0 |
Northwest Africa 12004 | Angrite | 4.4310 | 2.2850 | -0.04 | -0.09 | 0.14 | 0.19 |
Elephant Moraine 90757 | Aubrite | 4.5910 | 2.3050 | -0.103 | 0.07 | 0.16 | 0.12 |
Northwest Africa 4882 | Brachinite | 4.3680 | 2.0640 | -0.227 | -0.16 | -0.08 | 0 |
Northwest Africa 4882 | Brachinite | 4.3680 | 2.0640 | -0.227 | -0.16 | -0.08 | 0 |
Northwest Africa 15861 | Angrite | 4.5880 | 2.3100 | -0.097 | 0.06 | 0.17 | 0.13 |
Northwest Africa 12320 | Angrite | 4.4070 | 2.2810 | -0.031 | -0.12 | 0.14 | 0.2 |
Northwest Africa 10423 | Eucrite-cm | 4.6900 | 2.2300 | -0.23 | 0.17 | 0.09 | -0 |
Northwest Africa 4872 | Brachinite | 4.3540 | 2.0610 | -0.223 | -0.17 | -0.08 | 0.01 |
Northwest Africa 4872 | Brachinite | 4.3540 | 2.0610 | -0.223 | -0.17 | -0.08 | 0.01 |
Los Vientos 263 | Pallasite, ungrouped | 4.3400 | 2.0900 | -0.187 | -0.18 | -0.06 | 0.04 |
Northwest Africa 12320 | Angrite | 4.5450 | 2.3390 | -0.045 | 0.02 | 0.19 | 0.18 |
Northwest Africa 8059 | LL3.05 | 4.7020 | 2.2280 | -0.238 | 0.18 | 0.08 | -0.01 |
Cumberland Falls | Aubrite | 4.5400 | 2.3600 | -0.022 | 0.02 | 0.22 | 0.21 |
Northwest Africa 2904 | Eucrite-pmict | 4.7400 | 2.1300 | -0.356 | 0.22 | -0.02 | -0.13 |
Northwest Africa 5400 | Achondrite-ung | 4.4860 | 2.3670 | 0.013 | -0.04 | 0.22 | 0.24 |
Parsa | EH3 | 4.5500 | 2.3800 | -0.007 | 0.03 | 0.24 | 0.22 |
Northwest Africa 12004 | Angrite | 4.2840 | 2.1970 | -0.051 | -0.24 | 0.05 | 0.18 |
Northwest Africa 12397 | Mesosiderite | 4.3230 | 1.9920 | -0.276 | -0.2 | -0.15 | -0.05 |
Northwest Africa 4872 | Brachinite | 4.3080 | 2.0120 | -0.248 | -0.22 | -0.13 | -0.02 |
Northwest Africa 4872 | Brachinite | 4.3080 | 2.0120 | -0.248 | -0.22 | -0.13 | -0.02 |
Al Huwaysah 010 | Achondrite-ung | 4.7300 | 2.3100 | -0.171 | 0.21 | 0.17 | 0.06 |
Northwest Africa 7904 | Brachinite | 4.7810 | 2.2100 | -0.297 | 0.26 | 0.07 | -0.07 |
El Médano 395 | Brachinite | 4.2900 | 2.0200 | -0.23 | -0.23 | -0.13 | -0 |
Northwest Africa 8173 | Enst achon | 4.6000 | 2.4000 | -0.013 | 0.08 | 0.26 | 0.21 |
Hutchison Icefield 18034 | Aubrite | 4.5310 | 2.4140 | 0.037 | 0.01 | 0.27 | 0.26 |
Northwest Africa 11917 | Winonaite | 4.5410 | 1.8760 | -0.505 | 0.02 | -0.27 | -0.28 |
Northwest Africa 12951 | Winonaite | 4.7300 | 1.9690 | -0.511 | 0.21 | -0.18 | -0.28 |
Northwest Africa 6292 | Achondrite-ung | 4.5500 | 2.4200 | 0.033 | 0.03 | 0.28 | 0.26 |
Northwest Africa 13735 | Winonaite | 4.7420 | 1.9740 | -0.513 | 0.22 | -0.17 | -0.28 |
Northwest Africa 6474 | Brachinite | 4.2340 | 2.1810 | -0.04 | -0.29 | 0.04 | 0.19 |
Northwest Africa 15317 | Angrite | 4.7340 | 2.3530 | -0.13 | 0.21 | 0.21 | 0.1 |
Northwest Africa 12543 | Winonaite | 4.6620 | 1.8800 | -0.565 | 0.14 | -0.27 | -0.34 |
Queen Alexandra Range 94594 | EL3 | 4.5640 | 2.4570 | 0.062 | 0.04 | 0.31 | 0.29 |
Thiel Mountains 07009 | EL6 | 4.2100 | 2.2100 | 0.001 | -0.31 | 0.07 | 0.23 |
Qingzhen | EH3 | 4.7000 | 2.4200 | -0.046 | 0.18 | 0.28 | 0.18 |
Zag (b) | Winonaite | 4.8400 | 2.0600 | -0.478 | 0.32 | -0.09 | -0.25 |
Jiddat al Harasis 395 | Diogenite | 4.2300 | 1.9900 | -0.229 | -0.29 | -0.16 | -0 |
Northwest Africa 6023 | Brachinite-an | 4.8380 | 2.2690 | -0.268 | 0.31 | 0.12 | -0.04 |
Northwest Africa 5363 | Achondrite-ung | 4.1830 | 2.1520 | -0.043 | -0.34 | 0.01 | 0.19 |
Northwest Africa 14988 | Winonaite | 4.8560 | 2.0210 | -0.525 | 0.33 | -0.12 | -0.3 |
Northwest Africa 13432 | Winonaite | 4.8550 | 2.0160 | -0.53 | 0.33 | -0.13 | -0.3 |
Queen Alexandra Range 94204 | EH7 | 4.7130 | 2.4530 | -0.019 | 0.19 | 0.31 | 0.21 |
Northwest Africa 2999 | Angrite | 4.1540 | 2.0950 | -0.084 | -0.37 | -0.05 | 0.14 |
Northwest Africa 7605 | Brachinite | 4.8220 | 2.3700 | -0.159 | 0.3 | 0.23 | 0.07 |
Acfer 366 | CH3 | 4.6100 | 1.7810 | -0.636 | 0.09 | -0.36 | -0.41 |
Northwest Africa 10637 | Brachinite | 4.7940 | 2.4050 | -0.11 | 0.27 | 0.26 | 0.12 |
Northwest Africa 12951 | Winonaite | 4.8870 | 2.0490 | -0.513 | 0.36 | -0.1 | -0.29 |
Dhofar 378 | Martian (shergottite) | 4.4600 | 2.5200 | 0.18 | -0.06 | 0.38 | 0.41 |
Northwest Africa 8686 | Martian (shergottite) | 4.4170 | 2.5110 | 0.193 | -0.11 | 0.37 | 0.42 |
Old Homestead 003 | Howardite | 4.8800 | 2.3000 | -0.259 | 0.36 | 0.16 | -0.03 |
Northwest Africa 6690 | Diogenite | 4.1900 | 1.9400 | -0.258 | -0.33 | -0.21 | -0.03 |
Northwest Africa 10424 | Eucrite-cm | 4.1800 | 1.9500 | -0.243 | -0.34 | -0.2 | -0.01 |
Northwest Africa 12338 | Achondrite-ung | 4.1600 | 1.9800 | -0.202 | -0.36 | -0.17 | 0.03 |
Acfer 287 | E4 | 4.1610 | 1.9760 | -0.207 | -0.36 | -0.17 | 0.02 |
Pesyanoe | Aubrite | 4.7890 | 2.4570 | -0.055 | 0.27 | 0.31 | 0.17 |
Northwest Africa 4937 | Winonaite | 4.3700 | 1.7630 | -0.529 | -0.15 | -0.38 | -0.3 |
Northwest Africa 10416 | Martian | 4.3100 | 2.5000 | 0.238 | -0.21 | 0.36 | 0.47 |
El Médano 395 | Brachinite | 4.8970 | 2.3290 | -0.239 | 0.37 | 0.18 | -0.01 |
Northwest Africa 7025 | Mesosiderite | 4.1490 | 1.9610 | -0.215 | -0.38 | -0.18 | 0.01 |
Northwest Africa 15317 | Angrite | 4.8020 | 2.4570 | -0.062 | 0.28 | 0.31 | 0.17 |
Northwest Africa 5718 | Martian (shergottite) | 4.2900 | 2.5000 | 0.249 | -0.23 | 0.36 | 0.48 |
Northwest Africa 6963 | Martian (shergottite) | 4.3320 | 2.5280 | 0.255 | -0.19 | 0.38 | 0.48 |
Yamato 980459 | Martian (shergottite) | 4.3100 | 2.5200 | 0.258 | -0.21 | 0.38 | 0.49 |
Yamato 980459 | Martian (shergottite) | 4.3100 | 2.5200 | 0.258 | -0.21 | 0.38 | 0.49 |
Northwest Africa 12532 | Brachinite | 4.9080 | 2.3450 | -0.229 | 0.38 | 0.2 | -0 |
Northwest Africa 12522 | Martian (shergottite) | 4.4260 | 2.5670 | 0.244 | -0.1 | 0.42 | 0.47 |
Sayh al Uhaymir 094 | Martian (shergottite) | 4.2900 | 2.5100 | 0.259 | -0.23 | 0.37 | 0.49 |
Northwest Africa 3151 | Brachinite | 4.8600 | 2.4200 | -0.129 | 0.34 | 0.28 | 0.1 |
Northwest Africa 11729 | Eucrite-an | 4.9340 | 2.3010 | -0.287 | 0.41 | 0.16 | -0.06 |
Northwest Africa 10593 | Martian (shergottite) | 4.4840 | 2.5820 | 0.229 | -0.04 | 0.44 | 0.46 |
Yamato 691 | EH3 | 4.8300 | 2.4600 | -0.074 | 0.31 | 0.32 | 0.15 |
Northwest Africa 2999 | Angrite | 4.0930 | 2.0540 | -0.093 | -0.43 | -0.09 | 0.13 |
Northwest Africa 2986 | Martian (shergottite) | 4.4500 | 2.5800 | 0.245 | -0.07 | 0.44 | 0.47 |
Northwest Africa 7032 | Martian (shergottite) | 4.4230 | 2.5770 | 0.256 | -0.1 | 0.43 | 0.48 |
Northwest Africa 13355 | Eucrite-an | 4.1570 | 1.8950 | -0.286 | -0.37 | -0.25 | -0.06 |
Northwest Africa 13917 | Winonaite | 4.9590 | 2.0550 | -0.545 | 0.44 | -0.09 | -0.32 |
Northwest Africa 739 | CH3 | 4.3200 | 1.7500 | -0.516 | -0.2 | -0.4 | -0.29 |
Northwest Africa 14988 | Winonaite | 4.9590 | 2.0440 | -0.556 | 0.44 | -0.1 | -0.33 |
Northwest Africa 10416 | Martian | 4.3920 | 2.5730 | 0.268 | -0.13 | 0.43 | 0.5 |
Northwest Africa 11264 | Eucrite | 4.1300 | 1.9300 | -0.236 | -0.39 | -0.22 | -0.01 |
Northwest Africa 5990 | Martian (shergottite) | 4.2100 | 2.4700 | 0.261 | -0.31 | 0.33 | 0.49 |
Northwest Africa 10153 | Martian (nakhlite) | 4.4460 | 2.5910 | 0.258 | -0.08 | 0.45 | 0.49 |
Northwest Africa 10593 | Martian (shergottite) | 4.3730 | 2.5760 | 0.281 | -0.15 | 0.43 | 0.51 |
Northwest Africa 5718 | Martian (shergottite) | 4.4700 | 2.6000 | 0.254 | -0.05 | 0.46 | 0.48 |
Northwest Africa 5990 | Martian (shergottite) | 4.1500 | 2.4100 | 0.232 | -0.37 | 0.27 | 0.46 |
Northwest Africa 8656 | Martian (shergottite) | 4.2760 | 2.5340 | 0.29 | -0.25 | 0.39 | 0.52 |
Northwest Africa 8124 | LL3 | 4.7180 | 2.5680 | 0.093 | 0.19 | 0.42 | 0.32 |
Northwest Africa 7812 | Angrite | 4.0680 | 2.0510 | -0.083 | -0.46 | -0.09 | 0.14 |
Northwest Africa 12540 | Eucrite-an | 4.1200 | 1.9090 | -0.252 | -0.4 | -0.24 | -0.02 |
Ramlat Fasad 533 | Martian (Shergottite) | 4.2430 | 2.5200 | 0.293 | -0.28 | 0.38 | 0.52 |
Northwest Africa 13921 | Achondrite-ung | 4.0920 | 1.9630 | -0.184 | -0.43 | -0.18 | 0.04 |
Allan Hills 88046 | EH3 | 4.9050 | 2.4200 | -0.153 | 0.38 | 0.28 | 0.08 |
Itqiy | EH7-an | 4.8000 | 2.5300 | 0.012 | 0.28 | 0.39 | 0.24 |
Northwest Africa 10602 | Eucrite-melt breccia | 4.9520 | 2.3490 | -0.248 | 0.43 | 0.2 | -0.02 |
Yamato 000097 | Martian (shergottite) | 4.1780 | 2.4710 | 0.278 | -0.35 | 0.33 | 0.51 |
Bustee | Aubrite | 4.8300 | 2.5100 | -0.024 | 0.31 | 0.37 | 0.2 |
Northwest Africa 7635 | Martian (shergottite) | 4.2170 | 2.5130 | 0.3 | -0.31 | 0.37 | 0.53 |
Allan Hills A78113 | Aubrite | 4.8100 | 2.5300 | 0.007 | 0.29 | 0.39 | 0.23 |
Northwest Africa 8649 | LL3.05 | 4.4640 | 2.6230 | 0.28 | -0.06 | 0.48 | 0.51 |
Northwest Africa 13457 | Eucrite | 4.1250 | 1.8750 | -0.289 | -0.4 | -0.27 | -0.06 |
Yamato 000047 | Martian (shergottite) | 4.1780 | 2.4810 | 0.288 | -0.35 | 0.34 | 0.52 |
Northwest Africa 7635 | Martian (shergottite) | 4.2410 | 2.5360 | 0.31 | -0.28 | 0.39 | 0.54 |
Northwest Africa 7635 | Martian (shergottite) | 4.2200 | 2.5210 | 0.306 | -0.3 | 0.38 | 0.53 |
Northwest Africa 10416 | Martian | 4.5000 | 2.6300 | 0.268 | -0.02 | 0.49 | 0.5 |
Northwest Africa 8694 | Martian (Chassignite) | 4.1800 | 2.4900 | 0.296 | -0.34 | 0.35 | 0.52 |
Northwest Africa 8656 | Martian (shergottite) | 4.4170 | 2.6230 | 0.305 | -0.11 | 0.48 | 0.53 |
Jiddat al Harasis 845 | Mesosiderite-C2 | 4.0770 | 1.9380 | -0.201 | -0.45 | -0.21 | 0.03 |
Northwest Africa 7944 | Martian (shergottite) | 4.3740 | 2.6150 | 0.319 | -0.15 | 0.47 | 0.55 |
Yamato 000027 | Martian (shergottite) | 4.1290 | 2.4460 | 0.279 | -0.4 | 0.3 | 0.51 |
Ramlat as Sahmah 511 | Eucrite | 4.0800 | 1.9200 | -0.22 | -0.44 | -0.23 | 0.01 |
Northwest Africa 8679 | Martian (shergottite) | 4.5620 | 2.6420 | 0.248 | 0.04 | 0.5 | 0.48 |
Northwest Africa 15861 | Angrite | 4.0440 | 2.0080 | -0.114 | -0.48 | -0.14 | 0.11 |
Northwest Africa 12241 | Martian (shergottite) | 4.6200 | 2.6350 | 0.211 | 0.1 | 0.49 | 0.44 |