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Meteoritical Bulletin: Oxygen Isotope Plots

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Change values (separate multiple values with semicolons) -    δ18O:    δ17O:    Δ17O:
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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).

References:


Data summary:
δ18Oδ17OΔ17O: givenΔ17O: linearComment
4.87001.6100-0.9200-0.922 

Nearest neighbors in MBDB (within 0.5 permil):
NameClassδ18Oδ17OΔ17O: calcΔ δ18OΔ δ17OΔ Δ17O
Northwest Africa 2627Acapulcoite4.96001.7500-0.8290.09 0.14 0.09
Northwest Africa 2656Acapulcoite5.04001.6900-0.9310.17 0.08 -0.01
FortunaWinonaite4.68001.6100-0.824-0.19 0 0.1
Northwest Africa 2656Acapulcoite5.05001.7100-0.9160.18 0.1 0.01
Northwest Africa 2627Acapulcoite4.93001.8200-0.7440.06 0.21 0.18
Northwest Africa 10085K45.01701.4110-1.1980.15 -0.2 -0.28
Ooldea 014Achondrite-prim-ung5.04501.8280-0.7950.18 0.22 0.13
Northwest Africa 10132Achondrite-ung4.70201.3730-1.072-0.17 -0.24 -0.15
Northwest Africa 1617Acapulcoite5.06001.8500-0.7810.19 0.24 0.14
Acfer 366CH34.61001.7810-0.616-0.26 0.17 0.31
Northwest Africa 1500Achondrite-ung4.56001.5800-0.791-0.31 -0.03 0.13
Northwest Africa 6484Lodranite4.54201.6350-0.727-0.33 0.02 0.2
Northwest Africa 12543Winonaite4.66201.8800-0.544-0.21 0.27 0.38
Yamato 980110Ureilite4.60001.3900-1.002-0.27 -0.22 -0.08
Northwest Africa 2627Acapulcoite4.51001.5600-0.785-0.36 -0.05 0.14
Northwest Africa 2627Acapulcoite4.51001.4700-0.875-0.36 -0.14 0.05
Northwest Africa 11917Winonaite4.54101.8760-0.485-0.33 0.27 0.44
Zag (b)Winonaite4.84002.0600-0.457-0.03 0.45 0.47
Northwest Africa 10132Achondrite-ung4.55701.2730-1.097-0.31 -0.34 -0.17
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