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Oxygen isotope composition of CI and CM chondrites. Data for CMs and CIs from Clayton and Mayeda (1999); CVs and CKs from Greenwood et al. (2010); COs from Greenwood and Franchi (2004). 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 |
---|---|---|---|---|
3.3550 | 0.0780 | -1.6870 | -1.667 | |
3.3310 | -0.0070 | -1.6769 | -1.739 | Δ17O off by 0.062 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Northwest Africa 3250 | Achondrite-prim | 3.2500 | -0.0300 | -1.72 | -0.09 | -0.07 | -0.02 |
Northwest Africa 2400 | Achondrite-ung | 3.2700 | 0.1500 | -1.55 | -0.07 | 0.11 | 0.15 |
Northwest Africa 7317 | CR6 | 3.5070 | 0.0570 | -1.767 | 0.16 | 0.02 | -0.06 |
Northwest Africa 6921 | CR6 | 3.1810 | -0.0650 | -1.719 | -0.16 | -0.1 | -0.02 |
Northwest Africa 12869 | Achondrite-prim | 3.1810 | -0.0720 | -1.726 | -0.16 | -0.11 | -0.02 |
Northwest Africa 8545 | Achondrite-ung | 3.1590 | 0.1200 | -1.523 | -0.18 | 0.08 | 0.18 |
Northwest Africa 7317 | CR6 | 3.5940 | 0.0640 | -1.805 | 0.25 | 0.03 | -0.1 |
Northwest Africa 12869 | Achondrite-prim | 3.5840 | 0.1700 | -1.694 | 0.24 | 0.13 | 0.01 |
Northwest Africa 8158 | Eucrite | 3.0220 | 0.0000 | -1.571 | -0.32 | -0.04 | 0.13 |
Northwest Africa 468 | Iron, IAB-ung | 3.0100 | 0.1800 | -1.385 | -0.33 | 0.14 | 0.32 |
Northwest Africa 12869 | Achondrite-prim | 3.6680 | 0.2250 | -1.682 | 0.33 | 0.19 | 0.02 |
Northwest Africa 8545 | Achondrite-ung | 2.9660 | 0.0040 | -1.538 | -0.38 | -0.03 | 0.16 |
Northwest Africa 12455 | CR7 | 3.6370 | 0.2960 | -1.595 | 0.29 | 0.26 | 0.11 |
Dhofar 125 | Acapulcoite | 3.5700 | 0.3600 | -1.496 | 0.23 | 0.32 | 0.21 |
Hassi el Biod 002 | Pallasite, ungrouped | 3.3900 | 0.4400 | -1.323 | 0.05 | 0.4 | 0.38 |
Northwest Africa 4448 | Lodranite | 3.4130 | 0.4420 | -1.333 | 0.07 | 0.41 | 0.37 |
Tintigny | Eucrite-pmict | 3.7560 | 0.0000 | -1.953 | 0.41 | -0.04 | -0.25 |
Tafassasset | Achondrite-prim | 2.9400 | 0.1800 | -1.349 | -0.4 | 0.14 | 0.35 |
Northwest Africa 4025 | CB | 3.7300 | 0.2200 | -1.72 | 0.39 | 0.18 | -0.02 |
Northwest Africa 5351 | Eucrite-mmict | 3.7000 | -0.2190 | -2.143 | 0.36 | -0.25 | -0.44 |
Northwest Africa 8287 | Acapulcoite | 3.2000 | 0.5000 | -1.164 | -0.14 | 0.46 | 0.54 |
Northwest Africa 12455 | CR7 | 3.7610 | 0.3030 | -1.653 | 0.42 | 0.27 | 0.05 |