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Oxygen isotope composition of differentiated achondrites. Data for angrites and HEDs from Greenwood et al. (2005). Data for Martian meteorites from Franchi et al. (1999). EFL: eucrite fractionation line (Greenwood et al., 2005), AFL: angrite fractionation line (Greenwood et al., 2005), MFL: Martian fractionation line (Franchi et al., 1999), TFL: terrestrial fractionation line. M: average value of Martian meteorite analyses from Franchi et al. (1999). E: bulk terrestrial mantle (Mattey et al., 1994). Open squares: HEDs, open triangles: angrites, open circles: Martian meteorites. 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 |
---|---|---|---|---|
4.3200 | 1.1900 | -1.0800 | -1.075 |
Name | Class | δ18O | δ17O | Δ17O: calc | Δ δ18O | Δ δ17O | Δ Δ17O |
---|---|---|---|---|---|---|---|
Northwest Africa 4663 | Lodranite | 4.1250 | 1.1440 | -1.019 | -0.2 | -0.05 | 0.06 |
El Médano 096 | Acapulcoite | 4.3000 | 1.4100 | -0.845 | -0.02 | 0.22 | 0.23 |
Northwest Africa 10132 | Achondrite-ung | 4.5570 | 1.2730 | -1.116 | 0.24 | 0.08 | -0.04 |
Northwest Africa 2210 | CH3 | 4.1100 | 1.0500 | -1.105 | -0.21 | -0.14 | -0.03 |
Yabrin 003 | Acapulcoite | 4.0400 | 1.1300 | -0.988 | -0.28 | -0.06 | 0.09 |
Northwest Africa 4663 | Lodranite | 4.0150 | 1.2020 | -0.903 | -0.31 | 0.01 | 0.17 |
Northwest Africa 2627 | Acapulcoite | 4.5100 | 1.4700 | -0.894 | 0.19 | 0.28 | 0.18 |
Yamato 980110 | Ureilite | 4.6000 | 1.3900 | -1.021 | 0.28 | 0.2 | 0.05 |
Northwest Africa 10074 | Acapulcoite | 3.9490 | 1.1760 | -0.895 | -0.37 | -0.01 | 0.18 |
Northwest Africa 6592 | Lodranite | 3.9800 | 1.0400 | -1.047 | -0.34 | -0.15 | 0.03 |
Northwest Africa 2210 | CH3 | 3.9500 | 1.0700 | -1.001 | -0.37 | -0.12 | 0.07 |
Northwest Africa 2627 | Acapulcoite | 4.5100 | 1.5600 | -0.805 | 0.19 | 0.37 | 0.27 |
Northwest Africa 8685 | Acapulcoite | 3.9320 | 1.0250 | -1.037 | -0.39 | -0.17 | 0.04 |
Northwest Africa 10132 | Achondrite-ung | 4.7020 | 1.3730 | -1.092 | 0.38 | 0.18 | -0.02 |
Northwest Africa 6704 | Achondrite-ung | 3.9220 | 1.0150 | -1.041 | -0.4 | -0.18 | 0.03 |
Northwest Africa 1500 | Achondrite-ung | 4.5600 | 1.5800 | -0.811 | 0.24 | 0.39 | 0.26 |
Northwest Africa 6484 | Lodranite | 4.5420 | 1.6350 | -0.746 | 0.22 | 0.45 | 0.33 |