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Meteoritical Bulletin: Oxygen Isotope Plots

Change plot type:
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).


Data summary:
δ18Oδ17OΔ17O: givenΔ17O: linearComment
2.94000.1800Not given-1.349 

Nearest neighbors in MBDB (within 0.5 permil):
NameClassδ18Oδ17OΔ17O: calcΔ δ18OΔ δ17OΔ Δ17O
Northwest Africa 468Iron, IAB-ung3.01000.1800-1.3850.07 0 -0.04
Northwest Africa 8287Acapulcoite2.94400.3560-1.1750 0.18 0.17
Northwest Africa 8545Achondrite-ung2.96600.0040-1.5380.03 -0.18 -0.19
Northwest Africa 8158Eucrite3.02200.0000-1.5710.08 -0.18 -0.22
Hassi el Biod 002Pallasite, ungrouped2.82000.3380-1.128-0.12 0.16 0.22
Northwest Africa 8545Achondrite-ung3.15900.1200-1.5230.22 -0.06 -0.17
Northwest Africa 2400Achondrite-ung3.27000.1500-1.550.33 -0.03 -0.2
Northwest Africa 6921CR63.1810-0.0650-1.7190.24 -0.25 -0.37
Northwest Africa 12869Achondrite-prim3.1810-0.0720-1.7260.24 -0.25 -0.38
Northwest Africa 8287Acapulcoite2.58500.2360-1.108-0.36 0.06 0.24
Northwest Africa 3250Achondrite-prim3.2500-0.0300-1.720.31 -0.21 -0.37
Northwest Africa 6557Acapulcoite2.79000.5500-0.901-0.15 0.37 0.45
Northwest Africa 8287Acapulcoite3.20000.5000-1.1640.26 0.32 0.18
Northwest Africa 2994Chondrite-ung3.35500.0780-1.6670.42 -0.1 -0.32
Northwest Africa 13754Lodranite2.51900.0840-1.226-0.42 -0.1 0.12
Northwest Africa 2994Chondrite-ung3.3310-0.0070-1.7390.39 -0.19 -0.39
Northwest Africa 4529Lodranite2.89400.6130-0.892-0.05 0.43 0.46
ChoteauPallasite, ungrouped2.50200.1520-1.149-0.44 -0.03 0.2
Northwest Africa 6685Lodranite2.50000.1000-1.2-0.44 -0.08 0.15
Northwest Africa 5782Acapulcoite/lodranite3.24000.5300-1.1550.3 0.35 0.19
Northwest Africa 6901Achondrite-prim2.7700-0.2500-1.69-0.17 -0.43 -0.34
Northwest Africa 6557Acapulcoite3.05000.6400-0.9460.11 0.46 0.4
Northwest Africa 6921CR62.7880-0.2800-1.73-0.15 -0.46 -0.38
Northwest Africa 5782Acapulcoite/lodranite3.03000.6600-0.9160.09 0.48 0.43
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