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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 |
---|---|---|---|---|
4.7810 | 2.2100 | -0.3140 | -0.276 | |
4.9990 | 2.6340 | -0.0050 | 0.035 | |
5.1660 | 2.6940 | -0.0340 | 0.008 | |
5.3480 | 2.7970 | -0.0270 | 0.016 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Dhofar 1983 | Lunar (feldsp. breccia) | 5.1000 | 2.6000 | -0.052 | 0.03 | 0.02 | 0 |
Northwest Africa 8173 | Enst achon | 5.0130 | 2.6050 | -0.002 | -0.06 | 0.02 | 0.05 |
Northwest Africa 4537 | Aubrite | 5.0210 | 2.6500 | 0.039 | -0.05 | 0.07 | 0.09 |
Northwest Africa 5400 | Achondrite-ung | 5.0610 | 2.6810 | 0.049 | -0.01 | 0.1 | 0.1 |
Northwest Africa 4741 | Achondrite-ung | 4.9900 | 2.6400 | 0.045 | -0.08 | 0.06 | 0.1 |
Northwest Africa 4042 | Achondrite-ung | 5.1780 | 2.5390 | -0.154 | 0.1 | -0.04 | -0.1 |
Northwest Africa 5548 | Achondrite-ung | 5.0000 | 2.6900 | 0.09 | -0.07 | 0.11 | 0.14 |
Northwest Africa 6077 | Achondrite-ung | 5.1800 | 2.6670 | -0.027 | 0.11 | 0.08 | 0.03 |
Northwest Africa 5548 | Achondrite-ung | 5.0800 | 2.7200 | 0.078 | 0.01 | 0.14 | 0.13 |
Jiddat al Harasis 556 | Howardite | 4.9800 | 2.4800 | -0.11 | -0.09 | -0.1 | -0.06 |
Northwest Africa 6023 | Brachinite-an | 5.1620 | 2.4450 | -0.239 | 0.09 | -0.14 | -0.18 |
Northwest Africa 6023 | Brachinite-an | 5.2260 | 2.4910 | -0.227 | 0.15 | -0.09 | -0.17 |
Northwest Africa 10637 | Brachinite | 5.0480 | 2.4020 | -0.223 | -0.03 | -0.18 | -0.17 |
Northwest Africa 6023 | Brachinite-an | 5.1100 | 2.4020 | -0.255 | 0.04 | -0.18 | -0.2 |
Northwest Africa 5400 | Achondrite-ung | 4.8800 | 2.5250 | -0.013 | -0.19 | -0.06 | 0.04 |
Northwest Africa 10637 | Brachinite | 5.2730 | 2.5260 | -0.216 | 0.2 | -0.06 | -0.16 |
Thiel Mountains 07014 | Eucrite | 5.2700 | 2.5100 | -0.23 | 0.2 | -0.07 | -0.18 |
Northwest Africa 5400 | Achondrite-ung | 5.2230 | 2.7410 | 0.025 | 0.15 | 0.16 | 0.08 |
Old Homestead 003 | Howardite | 5.0200 | 2.3700 | -0.24 | -0.05 | -0.21 | -0.19 |
Northwest Africa 8173 | Enst achon | 5.2650 | 2.7080 | -0.03 | 0.19 | 0.12 | 0.02 |
Northwest Africa 8059 | LL3.05 | 5.2770 | 2.6880 | -0.056 | 0.2 | 0.1 | -0 |
Silistra | Achondrite-ung | 5.3000 | 2.5000 | -0.256 | 0.23 | -0.08 | -0.2 |
Northwest Africa 10602 | Eucrite-melt breccia | 4.9520 | 2.3490 | -0.226 | -0.12 | -0.23 | -0.17 |
Northwest Africa 3151 | Brachinite | 4.8600 | 2.4200 | -0.107 | -0.21 | -0.16 | -0.05 |
Northwest Africa 4929 | Brachinite | 5.3300 | 2.4900 | -0.282 | 0.26 | -0.09 | -0.23 |
Dar al Gani 670 | Martian (shergottite) | 4.9500 | 2.8300 | 0.256 | -0.12 | 0.25 | 0.31 |
Northwest Africa 1457 | Winonaite | 5.1000 | 2.3000 | -0.352 | 0.03 | -0.28 | -0.3 |
Larkman Nunatak 06319 | Martian (shergottite) | 4.9200 | 2.8300 | 0.272 | -0.15 | 0.25 | 0.33 |
Northwest Africa 8679 | Martian (shergottite) | 4.9340 | 2.8450 | 0.279 | -0.14 | 0.26 | 0.33 |
Northwest Africa 7944 | Martian (shergottite) | 4.8920 | 2.8190 | 0.275 | -0.18 | 0.24 | 0.33 |
Northwest Africa 12241 | Martian (shergottite) | 4.8750 | 2.8080 | 0.273 | -0.2 | 0.22 | 0.33 |
Northwest Africa 10153 | Martian (nakhlite) | 4.9630 | 2.8700 | 0.289 | -0.11 | 0.29 | 0.34 |
Northwest Africa 8686 | Martian (shergottite) | 4.9840 | 2.8790 | 0.287 | -0.09 | 0.3 | 0.34 |
El Médano 395 | Brachinite | 4.8970 | 2.3290 | -0.217 | -0.18 | -0.25 | -0.16 |
Northwest Africa 2251 | Howardite | 5.2000 | 2.3000 | -0.404 | 0.13 | -0.28 | -0.35 |
Northwest Africa 4222 | Martian (shergottite) | 4.9100 | 2.8500 | 0.297 | -0.16 | 0.27 | 0.35 |
Northwest Africa 11729 | Eucrite-an | 4.9340 | 2.3010 | -0.265 | -0.14 | -0.28 | -0.21 |
Northwest Africa 10720 | Martian (nakhlite) | 4.9030 | 2.8540 | 0.304 | -0.17 | 0.27 | 0.36 |
Northwest Africa 12241 | Martian (shergottite) | 5.0920 | 2.9070 | 0.259 | 0.02 | 0.32 | 0.31 |
Dar al Gani 489 | Martian (shergottite) | 4.9800 | 2.8950 | 0.305 | -0.09 | 0.31 | 0.36 |
Northwest Africa 8679 | Martian (shergottite) | 4.9740 | 2.8960 | 0.31 | -0.1 | 0.31 | 0.36 |
Northwest Africa 12908 | Martian (shergottite) | 4.9670 | 2.8960 | 0.313 | -0.11 | 0.31 | 0.37 |
Northwest Africa 7605 | Brachinite | 4.8220 | 2.3700 | -0.137 | -0.25 | -0.21 | -0.08 |
Northwest Africa 10637 | Brachinite | 4.7940 | 2.4050 | -0.088 | -0.28 | -0.18 | -0.03 |
Tissint | Martian (shergottite) | 4.9430 | 2.8920 | 0.322 | -0.13 | 0.31 | 0.38 |
Northwest Africa 6172 | Achondrite-ung | 5.3500 | 2.7800 | -0.002 | 0.28 | 0.2 | 0.05 |
Northwest Africa 8649 | LL3.05 | 4.8960 | 2.8750 | 0.329 | -0.18 | 0.29 | 0.38 |
Northwest Africa 12542 | Martian (nakhlite) | 5.0760 | 2.9270 | 0.287 | 0 | 0.34 | 0.34 |
Old Homestead 003 | Howardite | 4.8800 | 2.3000 | -0.238 | -0.19 | -0.28 | -0.18 |
Dhofar 622 | H4-an | 5.1500 | 2.9200 | 0.242 | 0.08 | 0.34 | 0.3 |
Northwest Africa 11044 | Martian (shergottite) | 4.8860 | 2.8750 | 0.334 | -0.19 | 0.29 | 0.39 |
Northwest Africa 10720 | Martian (nakhlite) | 4.8020 | 2.8000 | 0.303 | -0.27 | 0.22 | 0.36 |
Larkman Nunatak 06319 | Martian (shergottite) | 4.8500 | 2.8500 | 0.328 | -0.22 | 0.27 | 0.38 |
Northwest Africa 11288 | Martian (shergottite) | 4.9320 | 2.9020 | 0.337 | -0.14 | 0.32 | 0.39 |
Willaroy | H3.8-an | 5.0300 | 2.9300 | 0.314 | -0.04 | 0.35 | 0.37 |
Tissint | Martian (shergottite) | 4.8440 | 2.8490 | 0.33 | -0.23 | 0.27 | 0.38 |
Northwest Africa 11115 | Martian (shergottite) | 4.8210 | 2.8290 | 0.322 | -0.25 | 0.25 | 0.38 |
Northwest Africa 7755 | Martian (shergottite) | 4.8860 | 2.8820 | 0.341 | -0.19 | 0.3 | 0.4 |
Northwest Africa 7257 | Martian (shergottite) | 4.8200 | 2.8300 | 0.324 | -0.25 | 0.25 | 0.38 |
Northwest Africa 8124 | LL3 | 4.7180 | 2.5680 | 0.115 | -0.36 | -0.02 | 0.17 |
Northwest Africa 7388 | Brachinite | 5.4130 | 2.7050 | -0.11 | 0.34 | 0.12 | -0.06 |
Northwest Africa 11044 | Martian (shergottite) | 4.8260 | 2.8500 | 0.34 | -0.25 | 0.27 | 0.39 |
Northwest Africa 2986 | Martian (shergottite) | 4.7800 | 2.8000 | 0.314 | -0.29 | 0.22 | 0.37 |
Northwest Africa 11044 | Martian (shergottite) | 5.0330 | 2.9480 | 0.331 | -0.04 | 0.36 | 0.39 |
Northwest Africa 12542 | Martian (nakhlite) | 5.0960 | 2.9500 | 0.3 | 0.02 | 0.37 | 0.35 |
Jiddat al Harasis 479 | Martian (shergottite) | 5.0700 | 2.9510 | 0.315 | -0 | 0.37 | 0.37 |
Northwest Africa 10808 | Martian (shergottite) | 4.7800 | 2.8100 | 0.324 | -0.29 | 0.23 | 0.38 |
Northwest Africa 5885 | Aubrite | 5.3350 | 2.8490 | 0.075 | 0.26 | 0.27 | 0.13 |
Northwest Africa 10808 | Martian (shergottite) | 4.7790 | 2.8120 | 0.327 | -0.29 | 0.23 | 0.38 |
Northwest Africa 10416 | Martian | 4.7400 | 2.7600 | 0.295 | -0.33 | 0.18 | 0.35 |
Elephant Moraine 87521 | Lunar (basalt) | 5.3900 | 2.7900 | -0.013 | 0.32 | 0.21 | 0.04 |
Northwest Africa 11115 | Martian (shergottite) | 4.7700 | 2.8170 | 0.337 | -0.3 | 0.23 | 0.39 |
Sayh al Uhaymir 150 | Martian (shergottite) | 4.7400 | 2.7800 | 0.315 | -0.33 | 0.2 | 0.37 |
Northwest Africa 10593 | Martian (shergottite) | 4.7140 | 2.7360 | 0.285 | -0.36 | 0.15 | 0.34 |
Dar al Gani 1037 | Martian (shergottite) | 5.2900 | 2.9100 | 0.159 | 0.22 | 0.33 | 0.21 |
Northwest Africa 6023 | Brachinite-an | 4.8380 | 2.2690 | -0.247 | -0.24 | -0.31 | -0.19 |
Northwest Africa 6369 | Iron, IAB complex | 5.3900 | 2.3500 | -0.453 | 0.32 | -0.23 | -0.4 |
Northwest Africa 10851 | Winonaite | 5.2420 | 2.2240 | -0.502 | 0.17 | -0.36 | -0.45 |
Northwest Africa 12908 | Martian (shergottite) | 4.7280 | 2.7800 | 0.321 | -0.35 | 0.2 | 0.38 |
Northwest Africa 13432 | Winonaite | 5.3280 | 2.2720 | -0.499 | 0.25 | -0.31 | -0.44 |
Northwest Africa 10593 | Martian (shergottite) | 4.6910 | 2.7100 | 0.271 | -0.38 | 0.13 | 0.33 |
Northwest Africa 4518 | Achondrite-ung | 5.4700 | 2.6600 | -0.184 | 0.4 | 0.08 | -0.13 |
Northwest Africa 13432 | Winonaite | 5.1960 | 2.1960 | -0.506 | 0.12 | -0.39 | -0.45 |
Northwest Africa 7755 | Martian (shergottite) | 4.6960 | 2.7350 | 0.293 | -0.38 | 0.15 | 0.35 |
Northwest Africa 10659 | Martian (nakhlite) | 5.1390 | 2.9900 | 0.318 | 0.07 | 0.41 | 0.37 |
Northwest Africa 13179 | Martian | 4.7190 | 2.7990 | 0.345 | -0.35 | 0.22 | 0.4 |
Northwest Africa 4864 | Martian (shergottite) | 5.1000 | 3.0000 | 0.348 | 0.03 | 0.42 | 0.4 |
Northwest Africa 7258 | Martian (shergottite) | 4.7160 | 2.8040 | 0.352 | -0.36 | 0.22 | 0.41 |
Northwest Africa 7755 | Martian (shergottite) | 5.1880 | 2.9880 | 0.29 | 0.11 | 0.4 | 0.34 |
Northwest Africa 6448 | Winonaite | 5.1340 | 2.1670 | -0.503 | 0.06 | -0.42 | -0.45 |
Northwest Africa 8679 | Martian (shergottite) | 4.6800 | 2.7420 | 0.308 | -0.39 | 0.16 | 0.36 |
Northwest Africa 10808 | Martian (shergottite) | 4.6600 | 2.6830 | 0.26 | -0.41 | 0.1 | 0.31 |
Northwest Africa 8656 | Martian (shergottite) | 4.6920 | 2.7720 | 0.332 | -0.38 | 0.19 | 0.39 |
Northwest Africa 6448 | Winonaite | 5.1550 | 2.1660 | -0.515 | 0.08 | -0.42 | -0.46 |
Northwest Africa 8686 | Martian (shergottite) | 4.6710 | 2.7230 | 0.294 | -0.4 | 0.14 | 0.35 |
Northwest Africa 7257 | Martian (shergottite) | 4.7400 | 2.8500 | 0.385 | -0.33 | 0.27 | 0.44 |
Northwest Africa 6162 | Martian (shergottite) | 4.6800 | 2.7500 | 0.316 | -0.39 | 0.17 | 0.37 |
Northwest Africa 12908 | Martian (shergottite) | 4.6700 | 2.7380 | 0.31 | -0.4 | 0.15 | 0.36 |
Northwest Africa 7042 | Martian (shergottite) | 5.0790 | 3.0160 | 0.375 | 0.01 | 0.43 | 0.43 |
Northwest Africa 10851 | Winonaite | 5.0780 | 2.1490 | -0.492 | 0 | -0.43 | -0.44 |
Northwest Africa 10851 | Winonaite | 5.4380 | 2.3450 | -0.483 | 0.36 | -0.24 | -0.43 |
Northwest Africa 480 | Martian (shergottite) | 4.7800 | 2.9100 | 0.424 | -0.29 | 0.33 | 0.48 |
Al Huwaysah 010 | Achondrite-ung | 4.7300 | 2.3100 | -0.15 | -0.34 | -0.27 | -0.1 |
Northwest Africa 13179 | Martian | 4.6900 | 2.8010 | 0.362 | -0.38 | 0.22 | 0.42 |
MacAlpine Hills 88104 | Lunar (anorth) | 5.5000 | 2.7000 | -0.16 | 0.43 | 0.12 | -0.11 |
Dhofar 1441 | Achondrite-ung | 5.5080 | 2.6750 | -0.189 | 0.43 | 0.09 | -0.13 |
Northwest Africa 2986 | Martian (shergottite) | 4.6500 | 2.7300 | 0.312 | -0.42 | 0.15 | 0.37 |
Northwest Africa 8276 | L3.00 | 4.6430 | 2.7340 | 0.32 | -0.43 | 0.15 | 0.37 |
Northwest Africa 12241 | Martian (shergottite) | 4.6200 | 2.6350 | 0.233 | -0.45 | 0.05 | 0.29 |
Northwest Africa 10416 | Martian | 4.6270 | 2.7160 | 0.31 | -0.45 | 0.13 | 0.36 |
Northwest Africa 12543 | Winonaite | 5.1180 | 2.1200 | -0.541 | 0.04 | -0.46 | -0.49 |
Northwest Africa 12951 | Winonaite | 5.0350 | 2.1190 | -0.499 | -0.04 | -0.46 | -0.44 |
Northwest Africa 11807 | Winonaite | 5.4870 | 2.3600 | -0.493 | 0.41 | -0.22 | -0.44 |
Northwest Africa 2041 | OC3 | 4.8500 | 3.0000 | 0.478 | -0.22 | 0.42 | 0.53 |
Abar al' Uj 012 | Lunar | 5.4600 | 2.8600 | 0.021 | 0.39 | 0.28 | 0.08 |
Northwest Africa 13134 | Martian (shergottite) | 4.6360 | 2.7700 | 0.359 | -0.44 | 0.19 | 0.41 |
Northwest Africa 11729 | Eucrite-an | 5.5400 | 2.6800 | -0.201 | 0.47 | 0.1 | -0.15 |
Allan Hills 84001 | Martian (OPX) | 4.6000 | 2.6500 | 0.258 | -0.47 | 0.07 | 0.31 |
Silistra | Achondrite-ung | 5.5500 | 2.6400 | -0.246 | 0.48 | 0.06 | -0.19 |
Ramlat Fasad 057 | Martian (shergottite) | 5.2570 | 3.0310 | 0.297 | 0.18 | 0.45 | 0.35 |
Northwest Africa 7032 | Martian (shergottite) | 4.5990 | 2.6810 | 0.29 | -0.47 | 0.1 | 0.34 |
Northwest Africa 2041 | OC3 | 4.8750 | 3.0300 | 0.495 | -0.2 | 0.45 | 0.55 |
Northwest Africa 8649 | LL3.05 | 4.6390 | 2.8070 | 0.395 | -0.43 | 0.22 | 0.45 |
Northwest Africa 8400 | H7 | 4.9470 | 3.0560 | 0.484 | -0.13 | 0.47 | 0.54 |
Northwest Africa 2986 | Martian (shergottite) | 4.5900 | 2.6700 | 0.283 | -0.48 | 0.09 | 0.34 |
Northwest Africa 6424 | Achondrite-ung | 5.4600 | 2.8900 | 0.051 | 0.39 | 0.31 | 0.11 |
Northwest Africa 10720 | Martian (nakhlite) | 4.5810 | 2.6690 | 0.287 | -0.49 | 0.09 | 0.34 |