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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
6.60003.0100-0.4200-0.422 

Nearest neighbors in MBDB (within 0.5 permil):
NameClassδ18Oδ17OΔ17O: calcΔ δ18OΔ δ17OΔ Δ17O
Dhofar 732Achondrite-ung6.64002.7700-0.6830.04 -0.24 -0.26
Ooldea 014Achondrite-prim-ung6.56702.7660-0.649-0.03 -0.24 -0.23
Northwest Africa 11729Eucrite-an6.31203.0620-0.22-0.29 0.05 0.2
Kalahari 008Lunar (anorth)6.52003.3200-0.07-0.08 0.31 0.35
Northwest Africa 4415EL66.38803.34000.018-0.21 0.33 0.44
Northwest Africa 4416EL66.38503.34200.022-0.22 0.33 0.44
Northwest Africa 12821EL36.40203.36700.038-0.2 0.36 0.46
Northwest Africa 5517Achondrite-ung6.80702.6510-0.8890.21 -0.36 -0.47
Northwest Africa 11444Lunar (melt breccia)6.28003.28000.014-0.32 0.27 0.44
Northwest Africa 10989Lunar6.51003.42000.035-0.09 0.41 0.46
Northwest Africa 10085K46.87302.6740-0.90.27 -0.34 -0.48
Aridal 010Brachinite6.17003.1000-0.108-0.43 0.09 0.31
Northwest Africa 5517Achondrite-ung6.61802.5700-0.8710.02 -0.44 -0.45
Dhofar 1436Lunar6.24403.28600.039-0.36 0.28 0.46
Dar al Gani 1031EL46.62003.47000.0280.02 0.46 0.45
Galb InalLunar6.19803.23800.015-0.4 0.23 0.44
Lynch 002Lunar6.67603.4700-0.0020.08 0.46 0.42
Northwest Africa 11558Achondrite-ung6.99002.7160-0.9190.39 -0.29 -0.5
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