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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 |
---|---|---|---|---|
5.3300 | 2.4900 | -0.3000 | -0.282 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Silistra | Achondrite-ung | 5.3000 | 2.5000 | -0.256 | -0.03 | 0.01 | 0.03 |
Thiel Mountains 07014 | Eucrite | 5.2700 | 2.5100 | -0.23 | -0.06 | 0.02 | 0.05 |
Northwest Africa 10637 | Brachinite | 5.2730 | 2.5260 | -0.216 | -0.06 | 0.04 | 0.07 |
Northwest Africa 6023 | Brachinite-an | 5.2260 | 2.4910 | -0.227 | -0.1 | 0 | 0.06 |
Northwest Africa 6369 | Iron, IAB complex | 5.3900 | 2.3500 | -0.453 | 0.06 | -0.14 | -0.17 |
Northwest Africa 4042 | Achondrite-ung | 5.1780 | 2.5390 | -0.154 | -0.15 | 0.05 | 0.13 |
Northwest Africa 6023 | Brachinite-an | 5.1620 | 2.4450 | -0.239 | -0.17 | -0.05 | 0.04 |
Northwest Africa 10851 | Winonaite | 5.4380 | 2.3450 | -0.483 | 0.11 | -0.15 | -0.2 |
Northwest Africa 11807 | Winonaite | 5.4870 | 2.3600 | -0.493 | 0.16 | -0.13 | -0.21 |
Northwest Africa 8059 | LL3.05 | 5.2770 | 2.6880 | -0.056 | -0.05 | 0.2 | 0.23 |
Northwest Africa 13432 | Winonaite | 5.3280 | 2.2720 | -0.499 | -0 | -0.22 | -0.22 |
Northwest Africa 4518 | Achondrite-ung | 5.4700 | 2.6600 | -0.184 | 0.14 | 0.17 | 0.1 |
Northwest Africa 8173 | Enst achon | 5.2650 | 2.7080 | -0.03 | -0.07 | 0.22 | 0.25 |
Northwest Africa 2251 | Howardite | 5.2000 | 2.3000 | -0.404 | -0.13 | -0.19 | -0.12 |
Northwest Africa 7388 | Brachinite | 5.4130 | 2.7050 | -0.11 | 0.08 | 0.22 | 0.17 |
Northwest Africa 6077 | Achondrite-ung | 5.1800 | 2.6670 | -0.027 | -0.15 | 0.18 | 0.26 |
Northwest Africa 6023 | Brachinite-an | 5.1100 | 2.4020 | -0.255 | -0.22 | -0.09 | 0.03 |
Dhofar 1983 | Lunar (feldsp. breccia) | 5.1000 | 2.6000 | -0.052 | -0.23 | 0.11 | 0.23 |
Northwest Africa 11807 | Winonaite | 5.5670 | 2.3950 | -0.5 | 0.24 | -0.1 | -0.22 |
Dhofar 1441 | Achondrite-ung | 5.5080 | 2.6750 | -0.189 | 0.18 | 0.19 | 0.09 |
Northwest Africa 7904 | Brachinite | 5.1660 | 2.6940 | 0.008 | -0.16 | 0.2 | 0.29 |
Silistra | Achondrite-ung | 5.5500 | 2.6400 | -0.246 | 0.22 | 0.15 | 0.04 |
MacAlpine Hills 88104 | Lunar (anorth) | 5.5000 | 2.7000 | -0.16 | 0.17 | 0.21 | 0.12 |
Northwest Africa 5400 | Achondrite-ung | 5.2230 | 2.7410 | 0.025 | -0.11 | 0.25 | 0.31 |
Northwest Africa 10851 | Winonaite | 5.2420 | 2.2240 | -0.502 | -0.09 | -0.27 | -0.22 |
Northwest Africa 11729 | Eucrite-an | 5.5400 | 2.6800 | -0.201 | 0.21 | 0.19 | 0.08 |
Northwest Africa 6172 | Achondrite-ung | 5.3500 | 2.7800 | -0.002 | 0.02 | 0.29 | 0.28 |
Northwest Africa 12543 | Winonaite | 5.5830 | 2.3450 | -0.558 | 0.25 | -0.15 | -0.28 |
Northwest Africa 10637 | Brachinite | 5.0480 | 2.4020 | -0.223 | -0.28 | -0.09 | 0.06 |
Northwest Africa 1457 | Winonaite | 5.1000 | 2.3000 | -0.352 | -0.23 | -0.19 | -0.07 |
Elephant Moraine 87521 | Lunar (basalt) | 5.3900 | 2.7900 | -0.013 | 0.06 | 0.3 | 0.27 |
Northwest Africa 7904 | Brachinite | 5.3480 | 2.7970 | 0.016 | 0.02 | 0.31 | 0.3 |
Northwest Africa 13432 | Winonaite | 5.1960 | 2.1960 | -0.506 | -0.13 | -0.29 | -0.22 |
Northwest Africa 5400 | Achondrite-ung | 5.0610 | 2.6810 | 0.049 | -0.27 | 0.19 | 0.33 |
Old Homestead 003 | Howardite | 5.0200 | 2.3700 | -0.24 | -0.31 | -0.12 | 0.04 |
Northwest Africa 8173 | Enst achon | 5.0130 | 2.6050 | -0.002 | -0.32 | 0.12 | 0.28 |
Northwest Africa 5548 | Achondrite-ung | 5.0800 | 2.7200 | 0.078 | -0.25 | 0.23 | 0.36 |
LaPaz Icefield 02205 | Lunar (basalt) | 5.6000 | 2.7000 | -0.212 | 0.27 | 0.21 | 0.07 |
Northwest Africa 4537 | Aubrite | 5.0210 | 2.6500 | 0.039 | -0.31 | 0.16 | 0.32 |
Jiddat al Harasis 556 | Howardite | 4.9800 | 2.4800 | -0.11 | -0.35 | -0.01 | 0.17 |
Northwest Africa 5885 | Aubrite | 5.3350 | 2.8490 | 0.075 | 0 | 0.36 | 0.36 |
Northwest Africa 7904 | Brachinite | 4.9990 | 2.6340 | 0.035 | -0.33 | 0.14 | 0.32 |
Northwest Africa 6448 | Winonaite | 5.1550 | 2.1660 | -0.515 | -0.18 | -0.32 | -0.23 |
Northwest Africa 4741 | Achondrite-ung | 4.9900 | 2.6400 | 0.045 | -0.34 | 0.15 | 0.33 |
Northwest Africa 6448 | Winonaite | 5.1340 | 2.1670 | -0.503 | -0.2 | -0.32 | -0.22 |
Northwest Africa 5548 | Achondrite-ung | 5.0000 | 2.6900 | 0.09 | -0.33 | 0.2 | 0.37 |
Abar al' Uj 012 | Lunar | 5.4600 | 2.8600 | 0.021 | 0.13 | 0.37 | 0.3 |
Northwest Africa 10602 | Eucrite-melt breccia | 4.9520 | 2.3490 | -0.226 | -0.38 | -0.14 | 0.06 |
Northwest Africa 6065 | Achondrite-ung | 5.5580 | 2.8300 | -0.06 | 0.23 | 0.34 | 0.22 |
Northwest Africa 13304 | Aubrite | 5.5110 | 2.8680 | 0.002 | 0.18 | 0.38 | 0.28 |
Northwest Africa 6424 | Achondrite-ung | 5.4600 | 2.8900 | 0.051 | 0.13 | 0.4 | 0.33 |
Dar al Gani 1037 | Martian (shergottite) | 5.2900 | 2.9100 | 0.159 | -0.04 | 0.42 | 0.44 |
Northwest Africa 10851 | Winonaite | 5.0780 | 2.1490 | -0.492 | -0.25 | -0.34 | -0.21 |
Northwest Africa 12543 | Winonaite | 5.1180 | 2.1200 | -0.541 | -0.21 | -0.37 | -0.26 |
Northwest Africa 11807 | Winonaite | 5.7580 | 2.4770 | -0.517 | 0.43 | -0.01 | -0.24 |
Northwest Africa 2828 | EL-melt rock | 5.5000 | 2.8900 | 0.03 | 0.17 | 0.4 | 0.31 |
Northwest Africa 11729 | Eucrite-an | 4.9340 | 2.3010 | -0.265 | -0.4 | -0.19 | 0.02 |
Northwest Africa 5400 | Achondrite-ung | 4.8800 | 2.5250 | -0.013 | -0.45 | 0.03 | 0.27 |
Northwest Africa 5885 | Aubrite | 5.5850 | 2.8750 | -0.029 | 0.26 | 0.39 | 0.25 |
El Médano 395 | Brachinite | 4.8970 | 2.3290 | -0.217 | -0.43 | -0.16 | 0.06 |
Dhofar 622 | H4-an | 5.1500 | 2.9200 | 0.242 | -0.18 | 0.43 | 0.52 |
Northwest Africa 6065 | Achondrite-ung | 5.5980 | 2.8730 | -0.038 | 0.27 | 0.38 | 0.24 |
Northwest Africa 2828 | EL-melt rock | 5.5600 | 2.9000 | 0.009 | 0.23 | 0.41 | 0.29 |
Northwest Africa 12951 | Winonaite | 5.0350 | 2.1190 | -0.499 | -0.3 | -0.37 | -0.22 |
Northwest Africa 3151 | Brachinite | 4.8600 | 2.4200 | -0.107 | -0.47 | -0.07 | 0.17 |
Northwest Africa 12241 | Martian (shergottite) | 5.0920 | 2.9070 | 0.259 | -0.24 | 0.42 | 0.54 |
Northwest Africa 7388 | Brachinite | 5.6350 | 2.8620 | -0.068 | 0.31 | 0.37 | 0.21 |
Northwest Africa 6572 | Achondrite-ung | 5.6190 | 2.8810 | -0.041 | 0.29 | 0.39 | 0.24 |
Northwest Africa 6077 | Achondrite-ung | 5.5360 | 2.9320 | 0.053 | 0.21 | 0.44 | 0.33 |
Old Homestead 003 | Howardite | 4.8800 | 2.3000 | -0.238 | -0.45 | -0.19 | 0.04 |