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Oxygen isotope composition of primitive achondrites (SNCs shown for comparison). Data for brachinites, winonaites, acapulcoite-lodranite clan from Greenwood et al. (2012). Data for ureilites from Clayton and Mayeda (1999). Data for Martian meteorites (SNCs) from Franchi et al. (1999) and compiled from laser fluorination analyses in the Meteoritical Bulletin. Δ17O calculated as: Δ17O = δ17O – 0.52δ18O. Individual winonaite and acapulcoite-lodranite clan samples are very highly susceptible to terrestrial weathering resulting in large shifts in δ18O and to a lesser extent Δ17O. Most analysis points for these two groups plotted on this diagram have been cleaned in EATG (ethanolamine thioglycollate) in order to reduce the influence of terrestrial weathering (see Greenwood et al., 2012 for further details). TFL: terrestrial fractionation line, Y&R: slope 1 line (Young and Russell, 1998), CCAM: carbonaceous chondrite anhydrous mineral line (Clayton et al., 1977; Clayton and Mayeda 1999). |
δ18O | δ17O | Δ17O: given | Δ17O: linear | Comment |
---|---|---|---|---|
3.5430 | 1.4160 | -0.4550 | -0.426 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Northwest Africa 8614 | Winonaite | 3.5430 | 1.4160 | -0.426 | 0 | 0 | 0 |
Yamato 981651 | Eucrite | 3.5500 | 1.4400 | -0.406 | 0.01 | 0.02 | 0.02 |
Yamato 981710 | Diogenite | 3.4900 | 1.3800 | -0.435 | -0.05 | -0.04 | -0.01 |
Miller Range 07001 | Diogenite-olivine | 3.5500 | 1.3400 | -0.506 | 0.01 | -0.08 | -0.08 |
Northwest Africa 2968 | Achondrite-ung | 3.6400 | 1.4600 | -0.433 | 0.1 | 0.04 | -0.01 |
Northwest Africa 8404 | Diogenite-olivine | 3.4770 | 1.5100 | -0.298 | -0.07 | 0.09 | 0.13 |
Miller Range 07003 | Diogenite | 3.6600 | 1.4800 | -0.423 | 0.12 | 0.06 | 0 |
Miller Range 07613 | Diogenite | 3.5500 | 1.5500 | -0.296 | 0.01 | 0.13 | 0.13 |
Northwest Africa 11916 | Achondrite-ung | 3.6800 | 1.4700 | -0.444 | 0.14 | 0.05 | -0.02 |
Bilanga | Diogenite | 3.4100 | 1.3500 | -0.423 | -0.13 | -0.07 | 0 |
Northwest Africa 8739 | Eucrite-pmict | 3.4200 | 1.5080 | -0.27 | -0.12 | 0.09 | 0.16 |
Northwest Africa 10752 | Diogenite | 3.4490 | 1.5400 | -0.253 | -0.09 | 0.12 | 0.17 |
Miller Range 07003 | Diogenite | 3.5700 | 1.5700 | -0.286 | 0.03 | 0.15 | 0.14 |
Jiddat al Harasis 804 | Eucrite | 3.4730 | 1.5610 | -0.245 | -0.07 | 0.15 | 0.18 |
Tirhert | Eucrite-unbr | 3.4150 | 1.5240 | -0.252 | -0.13 | 0.11 | 0.17 |
Northwest Africa 5743 | Howardite | 3.4100 | 1.5200 | -0.253 | -0.13 | 0.1 | 0.17 |
Northwest Africa 2739 | Howardite | 3.4390 | 1.5540 | -0.234 | -0.1 | 0.14 | 0.19 |
Sayh al Uhaymir 493 | Achondrite-ung | 3.5300 | 1.5900 | -0.246 | -0.01 | 0.17 | 0.18 |
Northwest Africa 5743 | Howardite | 3.4100 | 1.5300 | -0.243 | -0.13 | 0.11 | 0.18 |
Northwest Africa 6686 | Howardite | 3.4800 | 1.5800 | -0.23 | -0.06 | 0.16 | 0.2 |
Sayh al Uhaymir 493 | Achondrite-ung | 3.4100 | 1.5400 | -0.233 | -0.13 | 0.12 | 0.19 |
Northwest Africa 1882 | Mesosiderite-C | 3.3600 | 1.4200 | -0.327 | -0.18 | 0 | 0.1 |
Berthoud | Eucrite-mmict | 3.4600 | 1.5800 | -0.219 | -0.08 | 0.16 | 0.21 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.5160 | 1.5990 | -0.229 | -0.03 | 0.18 | 0.2 |
Northwest Africa 6489 | Diogenite | 3.5040 | 1.5980 | -0.224 | -0.04 | 0.18 | 0.2 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.4260 | 1.5710 | -0.211 | -0.12 | 0.16 | 0.22 |
Ooldea 015 | Howardite | 3.6440 | 1.5860 | -0.309 | 0.1 | 0.17 | 0.12 |
Ramlat as Sahmah 287 | Diogenite | 3.3800 | 1.5300 | -0.228 | -0.16 | 0.11 | 0.2 |
Jiddat al Harasis 804 | Eucrite | 3.5010 | 1.6130 | -0.208 | -0.04 | 0.2 | 0.22 |
Frontier Mountain 97045 | Eucrite-pmict | 3.4100 | 1.5700 | -0.203 | -0.13 | 0.15 | 0.22 |
Northwest Africa 12562 | Achondrite-ung | 3.4770 | 1.6090 | -0.199 | -0.07 | 0.19 | 0.23 |
Miller Range 07613 | Diogenite | 3.5700 | 1.6200 | -0.236 | 0.03 | 0.2 | 0.19 |
Northwest Africa 12562 | Achondrite-ung | 3.4920 | 1.6190 | -0.197 | -0.05 | 0.2 | 0.23 |
Northwest Africa 5738 | Eucrite-br | 3.5900 | 1.6200 | -0.247 | 0.05 | 0.2 | 0.18 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.5540 | 1.6300 | -0.218 | 0.01 | 0.21 | 0.21 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.3590 | 1.5290 | -0.218 | -0.18 | 0.11 | 0.21 |
Northwest Africa 5961 | Eucrite-mmict | 3.5800 | 1.6300 | -0.232 | 0.04 | 0.21 | 0.19 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.5480 | 1.6350 | -0.21 | 0 | 0.22 | 0.22 |
Northwest Africa 5312 | Mesosiderite | 3.3640 | 1.5450 | -0.204 | -0.18 | 0.13 | 0.22 |
Northwest Africa 1461 | Diogenite | 3.5840 | 1.6340 | -0.23 | 0.04 | 0.22 | 0.2 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.6070 | 1.6300 | -0.246 | 0.06 | 0.21 | 0.18 |
Northwest Africa 10765 | Mesosiderite | 3.5790 | 1.6450 | -0.216 | 0.04 | 0.23 | 0.21 |
Miller Range 07662 | Eucrite-br | 3.7000 | 1.5900 | -0.334 | 0.16 | 0.17 | 0.09 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.3680 | 1.5720 | -0.179 | -0.18 | 0.16 | 0.25 |
Elephant Moraine 99402 | Brachinite | 3.5700 | 1.6500 | -0.206 | 0.03 | 0.23 | 0.22 |
Northwest Africa 6909 | Eucrite | 3.6000 | 1.6470 | -0.225 | 0.06 | 0.23 | 0.2 |
Northwest Africa 1982 | Mesosiderite-C | 3.7800 | 1.4700 | -0.496 | 0.24 | 0.05 | -0.07 |
Graves Nunataks 98098 | Eucrite-unbr | 3.3000 | 1.4000 | -0.316 | -0.24 | -0.02 | 0.11 |
Northwest Africa 4272 | Diogenite | 3.7800 | 1.5000 | -0.466 | 0.24 | 0.08 | -0.04 |
Northwest Africa 5784 | Diogenite | 3.5600 | 1.6700 | -0.181 | 0.02 | 0.25 | 0.25 |
Northwest Africa 10765 | Mesosiderite | 3.6750 | 1.6380 | -0.273 | 0.13 | 0.22 | 0.15 |
Northwest Africa 5961 | Eucrite-mmict | 3.6300 | 1.6600 | -0.228 | 0.09 | 0.24 | 0.2 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.6080 | 1.6680 | -0.208 | 0.07 | 0.25 | 0.22 |
Northwest Africa 2339 | Eucrite | 3.6600 | 1.6500 | -0.253 | 0.12 | 0.23 | 0.17 |
Northwest Africa 4271 | Eucrite-pmict | 3.3400 | 1.2500 | -0.487 | -0.2 | -0.17 | -0.06 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.2860 | 1.4790 | -0.23 | -0.26 | 0.06 | 0.2 |
Northwest Africa 8671 | Eucrite-an | 3.6880 | 1.6420 | -0.276 | 0.15 | 0.23 | 0.15 |
La'gad 002 | Pallasite, PMG-an | 3.6230 | 1.6800 | -0.204 | 0.08 | 0.26 | 0.22 |
Tirhert | Eucrite-unbr | 3.2680 | 1.4510 | -0.248 | -0.28 | 0.04 | 0.18 |
Thiel Mountains 07016 | Pallasite | 3.3100 | 1.5700 | -0.151 | -0.23 | 0.15 | 0.28 |
Northwest Africa 6909 | Eucrite | 3.6470 | 1.6830 | -0.213 | 0.1 | 0.27 | 0.21 |
Northwest Africa 7831 | Diogenite | 3.6800 | 1.6770 | -0.237 | 0.14 | 0.26 | 0.19 |
Northwest Africa 8027 | Howardite | 3.6800 | 1.6800 | -0.234 | 0.14 | 0.26 | 0.19 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.6670 | 1.6930 | -0.214 | 0.12 | 0.28 | 0.21 |
Northwest Africa 4255 | Diogenite | 3.2500 | 1.3100 | -0.38 | -0.29 | -0.11 | 0.05 |
Northwest Africa 8404 | Diogenite-olivine | 3.2330 | 1.4520 | -0.229 | -0.31 | 0.04 | 0.2 |
Northwest Africa 10765 | Mesosiderite | 3.7330 | 1.6640 | -0.277 | 0.19 | 0.25 | 0.15 |
Northwest Africa 1459 | Diogenite | 3.6200 | 1.7200 | -0.162 | 0.08 | 0.3 | 0.26 |
Tirhert | Eucrite-unbr | 3.2330 | 1.4740 | -0.207 | -0.31 | 0.06 | 0.22 |
Chasseron | Pallasite, PMG | 3.2390 | 1.5140 | -0.17 | -0.3 | 0.1 | 0.26 |
Northwest Africa 7824 | Mesosiderite | 3.7180 | 1.6840 | -0.249 | 0.18 | 0.27 | 0.18 |
Northwest Africa 4482 | Pallasite, PMG | 3.6500 | 1.7200 | -0.178 | 0.11 | 0.3 | 0.25 |
Northwest Africa 4223 | Diogenite | 3.2200 | 1.4800 | -0.194 | -0.32 | 0.06 | 0.23 |
Northwest Africa 5134 | Eucrite | 3.7070 | 1.7070 | -0.221 | 0.16 | 0.29 | 0.21 |
Northwest Africa 12396 | Mesosiderite | 3.7450 | 1.6890 | -0.258 | 0.2 | 0.27 | 0.17 |
Northwest Africa 12566 | Mesosiderite-C3 | 3.2090 | 1.4780 | -0.191 | -0.33 | 0.06 | 0.24 |
Northwest Africa 4215 | Diogenite | 3.2030 | 1.4310 | -0.235 | -0.34 | 0.02 | 0.19 |
Miller Range 07001 | Diogenite-olivine | 3.8000 | 1.6400 | -0.336 | 0.26 | 0.22 | 0.09 |
Northwest Africa 5234 | Eucrite-mmict | 3.6940 | 1.7270 | -0.194 | 0.15 | 0.31 | 0.23 |
Northwest Africa 6105 | Eucrite-pmict | 3.7730 | 1.6790 | -0.283 | 0.23 | 0.26 | 0.14 |
Northwest Africa 1817 | Mesosiderite-B | 3.1900 | 1.4600 | -0.199 | -0.35 | 0.04 | 0.23 |
Northwest Africa 7824 | Mesosiderite | 3.7570 | 1.7080 | -0.246 | 0.21 | 0.29 | 0.18 |
Northwest Africa 8671 | Eucrite-an | 3.7760 | 1.6940 | -0.27 | 0.23 | 0.28 | 0.16 |
Northwest Africa 1461 | Diogenite | 3.1770 | 1.4100 | -0.242 | -0.37 | -0.01 | 0.18 |
Yamato 980318 | Eucrite-cm | 3.1800 | 1.3600 | -0.294 | -0.36 | -0.06 | 0.13 |
Yamato 980318 | Eucrite-cm | 3.1800 | 1.3600 | -0.294 | -0.36 | -0.06 | 0.13 |
Northwest Africa 10015 | Pallasite, PMG | 3.7000 | 1.7500 | -0.174 | 0.16 | 0.33 | 0.25 |
Northwest Africa 4269 | Eucrite-mmict | 3.7620 | 1.7180 | -0.238 | 0.22 | 0.3 | 0.19 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.1670 | 1.4400 | -0.207 | -0.38 | 0.02 | 0.22 |
Northwest Africa 1880 | Diogenite | 3.1600 | 1.4200 | -0.223 | -0.38 | 0 | 0.2 |
Jepara | Pallasite, PMG | 3.1600 | 1.3800 | -0.263 | -0.38 | -0.04 | 0.16 |
Northwest Africa 2738 | Howardite | 3.7310 | 1.7540 | -0.186 | 0.19 | 0.34 | 0.24 |
Northwest Africa 10752 | Diogenite | 3.1590 | 1.3610 | -0.282 | -0.38 | -0.05 | 0.14 |
Northwest Africa 4801 | Angrite | 3.5950 | 1.8090 | -0.06 | 0.05 | 0.39 | 0.37 |
Northwest Africa 12217 | Achondrite-ung | 3.6600 | 1.7960 | -0.107 | 0.12 | 0.38 | 0.32 |
Northwest Africa 5312 | Mesosiderite | 3.1490 | 1.4840 | -0.153 | -0.39 | 0.07 | 0.27 |
Jiddat al Harasis 203 | Mesosiderite-C2 | 3.1430 | 1.4030 | -0.231 | -0.4 | -0.01 | 0.2 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.1430 | 1.4580 | -0.176 | -0.4 | 0.04 | 0.25 |
Northwest Africa 12605 | Eucrite | 3.7750 | 1.7460 | -0.217 | 0.23 | 0.33 | 0.21 |
Northwest Africa 5349 | Eucrite-pmict | 3.8000 | 1.7300 | -0.246 | 0.26 | 0.31 | 0.18 |
Northwest Africa 4801 | Angrite | 3.5440 | 1.8230 | -0.02 | 0 | 0.41 | 0.41 |
Northwest Africa 12566 | Mesosiderite-C3 | 3.1320 | 1.4250 | -0.204 | -0.41 | 0.01 | 0.22 |
Miller Range 07662 | Eucrite-br | 3.8600 | 1.6800 | -0.327 | 0.32 | 0.26 | 0.1 |
Miller Range 07662 | Eucrite-br | 3.8900 | 1.6400 | -0.383 | 0.35 | 0.22 | 0.04 |
Northwest Africa 7674 | Lodranite | 3.4880 | 1.0040 | -0.81 | -0.06 | -0.41 | -0.38 |
Northwest Africa 12217 | Achondrite-ung | 3.7230 | 1.7930 | -0.143 | 0.18 | 0.38 | 0.28 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.7820 | 1.7600 | -0.207 | 0.24 | 0.34 | 0.22 |
Northwest Africa 4523 | Eucrite | 3.7910 | 1.7570 | -0.214 | 0.25 | 0.34 | 0.21 |
Northwest Africa 1645 | Mesosiderite-B | 3.7900 | 1.7600 | -0.211 | 0.25 | 0.34 | 0.22 |
Northwest Africa 3211 | Eucrite | 3.8500 | 1.7100 | -0.292 | 0.31 | 0.29 | 0.13 |
Pecora Escarpment 01021 | Eucrite-mmict | 3.8310 | 1.7400 | -0.252 | 0.29 | 0.32 | 0.17 |
Malotas (b) | Eucrite | 3.7870 | 1.7750 | -0.194 | 0.24 | 0.36 | 0.23 |
Northwest Africa 10074 | Acapulcoite | 3.7240 | 1.0210 | -0.915 | 0.18 | -0.4 | -0.49 |
Malotas (b) | Eucrite | 3.7790 | 1.7850 | -0.18 | 0.24 | 0.37 | 0.25 |
Umm as Samim 024 | Eucrite-cm | 3.8600 | 1.7200 | -0.287 | 0.32 | 0.3 | 0.14 |
Northwest Africa 3212 | Eucrite | 3.8400 | 1.7400 | -0.257 | 0.3 | 0.32 | 0.17 |
Northwest Africa 8671 | Eucrite-an | 3.8470 | 1.7360 | -0.264 | 0.3 | 0.32 | 0.16 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.8170 | 1.7630 | -0.222 | 0.27 | 0.35 | 0.2 |
Northwest Africa 5784 | Diogenite | 3.1000 | 1.3900 | -0.222 | -0.44 | -0.03 | 0.2 |
Northwest Africa 8404 | Diogenite-olivine | 3.1030 | 1.3280 | -0.286 | -0.44 | -0.09 | 0.14 |
Northwest Africa 12562 | Achondrite-ung | 3.7950 | 1.7880 | -0.185 | 0.25 | 0.37 | 0.24 |
Northwest Africa 10074 | Acapulcoite | 3.6910 | 0.9910 | -0.928 | 0.15 | -0.43 | -0.5 |
Northwest Africa 7193 | Eucrite-an | 3.8100 | 1.7800 | -0.201 | 0.27 | 0.36 | 0.23 |
Northwest Africa 5350 | Howardite | 3.7900 | 1.8000 | -0.171 | 0.25 | 0.38 | 0.26 |
Northwest Africa 2968 | Achondrite-ung | 3.0800 | 1.4400 | -0.162 | -0.46 | 0.02 | 0.26 |
Northwest Africa 4223 | Diogenite | 3.0800 | 1.4400 | -0.162 | -0.46 | 0.02 | 0.26 |
Northwest Africa 10154 | Diogenite-an | 3.0860 | 1.3320 | -0.273 | -0.46 | -0.08 | 0.15 |
Northwest Africa 10074 | Acapulcoite | 3.9490 | 1.1760 | -0.877 | 0.41 | -0.24 | -0.45 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.8780 | 1.7600 | -0.257 | 0.34 | 0.34 | 0.17 |
La'gad 002 | Pallasite, PMG-an | 3.8610 | 1.7770 | -0.231 | 0.32 | 0.36 | 0.2 |
Northwest Africa 10023 | Pallasite, PMG-an | 3.8870 | 1.7530 | -0.268 | 0.34 | 0.34 | 0.16 |
Northwest Africa 4529 | Lodranite | 3.4670 | 0.9390 | -0.864 | -0.08 | -0.48 | -0.44 |
Northwest Africa 10019 | Pallasite, ungrouped | 3.8710 | 1.7840 | -0.229 | 0.33 | 0.37 | 0.2 |
Northwest Africa 10252 | Pallasite, PMG-an | 3.0490 | 1.3510 | -0.234 | -0.49 | -0.07 | 0.19 |