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Oxygen isotope composition of HEDs and angrites. Data for angrites and HEDs from Greenwood et al. (2005). EFL: eucrite fractionation line (Greenwood et al., 2005), AFL: angrite fractionation line (Greenwood et al., 2005), TFL: terrestrial fractionation line. B: Bholghati matrix, P: Pasamonte. Δ17O is linearized using the format of Miller (2002): Δ17O = 1000 ln (1+ (δ17O/1000)) – λ1000 ln (1+ ( δ18O/1000)) where λ = 0.5247. |
δ18O | δ17O | Δ17O: given | Δ17O: Miller (2002) | Comment |
---|---|---|---|---|
3.7000 | -0.2190 | Not given | -2.159 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Tintigny | Eucrite-pmict | 3.7560 | 0.0000 | -1.969 | 0.06 | 0.22 | 0.19 |
Northwest Africa 7317 | CR6 | 3.5940 | 0.0640 | -1.82 | -0.11 | 0.28 | 0.34 |
Northwest Africa 7317 | CR6 | 3.5070 | 0.0570 | -1.782 | -0.19 | 0.28 | 0.38 |
Northwest Africa 12869 | Achondrite-prim | 3.5840 | 0.1700 | -1.709 | -0.12 | 0.39 | 0.45 |
Northwest Africa 2994 | Chondrite-ung | 3.3310 | -0.0070 | -1.754 | -0.37 | 0.21 | 0.41 |
Northwest Africa 4025 | CB | 3.7300 | 0.2200 | -1.735 | 0.03 | 0.44 | 0.42 |
Northwest Africa 12869 | Achondrite-prim | 3.6680 | 0.2250 | -1.698 | -0.03 | 0.44 | 0.46 |
Northwest Africa 2994 | Chondrite-ung | 3.3550 | 0.0780 | -1.681 | -0.35 | 0.3 | 0.48 |
Northwest Africa 3250 | Achondrite-prim | 3.2500 | -0.0300 | -1.734 | -0.45 | 0.19 | 0.42 |