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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
5.06001.8500-0.8600-0.781Δ17O off by 0.079

Nearest neighbors in MBDB (within 0.5 permil):
NameClassδ18Oδ17OΔ17O: calcΔ δ18OΔ δ17OΔ Δ17O
Ooldea 014Achondrite-prim-ung5.04501.8280-0.795-0.01 -0.02 -0.01
Northwest Africa 2627Acapulcoite4.93001.8200-0.744-0.13 -0.03 0.04
Northwest Africa 2656Acapulcoite5.05001.7100-0.916-0.01 -0.14 -0.13
Northwest Africa 2627Acapulcoite4.96001.7500-0.829-0.1 -0.1 -0.05
Northwest Africa 2656Acapulcoite5.04001.6900-0.931-0.02 -0.16 -0.15
Northwest Africa 12951Winonaite4.88702.0490-0.492-0.17 0.2 0.29
Northwest Africa 12951Winonaite5.03502.1190-0.499-0.02 0.27 0.28
Northwest Africa 12543Winonaite5.11802.1200-0.5410.06 0.27 0.24
Northwest Africa 10851Winonaite5.07802.1490-0.4920.02 0.3 0.29
Zag (b)Winonaite4.84002.0600-0.457-0.22 0.21 0.32
Northwest Africa 4399Acapulcoite4.87001.6100-0.922-0.19 -0.24 -0.14
Northwest Africa 2340CR25.37001.7700-1.0220.31 -0.08 -0.24
Northwest Africa 6448Winonaite5.13402.1670-0.5030.07 0.32 0.28
Northwest Africa 6448Winonaite5.15502.1660-0.5150.1 0.32 0.27
Northwest Africa 12951Winonaite4.73001.9690-0.491-0.33 0.12 0.29
Northwest Africa 12543Winonaite4.66201.8800-0.544-0.4 0.03 0.24
Northwest Africa 10851Winonaite5.24202.2240-0.5020.18 0.37 0.28
Northwest Africa 2904Eucrite-pmict4.74002.1300-0.335-0.32 0.28 0.45
Northwest Africa 10085K45.01701.4110-1.198-0.04 -0.44 -0.42
FortunaWinonaite4.68001.6100-0.824-0.38 -0.24 -0.04
Northwest Africa 1457Winonaite5.10002.3000-0.3520.04 0.45 0.43
Acfer 366CH34.61001.7810-0.616-0.45 -0.07 0.16
Northwest Africa 7904Brachinite4.78102.2100-0.276-0.28 0.36 0.51
Northwest Africa 11729Eucrite-an4.93402.3010-0.265-0.13 0.45 0.52
Northwest Africa 2251Howardite5.20002.3000-0.4040.14 0.45 0.38
Northwest Africa 6023Brachinite-an4.83802.2690-0.247-0.22 0.42 0.53
Old Homestead 003Howardite4.88002.3000-0.238-0.18 0.45 0.54
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