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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
4.66201.8800-0.5820-0.544 
5.11802.1200-0.5820-0.541 
5.58302.3450-0.6030-0.558 

Nearest neighbors in MBDB (within 0.5 permil):
NameClassδ18Oδ17OΔ17O: calcΔ δ18OΔ δ17OΔ Δ17O
Northwest Africa 6448Winonaite5.13402.1670-0.5030.01 0.05 0.05
Northwest Africa 10851Winonaite5.07802.1490-0.492-0.04 0.03 0.06
Northwest Africa 6448Winonaite5.15502.1660-0.5150.03 0.05 0.03
Northwest Africa 10851Winonaite5.24202.2240-0.5020.12 0.11 0.05
Northwest Africa 1457Winonaite5.10002.3000-0.352-0.02 0.19 0.2
Northwest Africa 2251Howardite5.20002.3000-0.4040.08 0.19 0.14
Northwest Africa 11729Eucrite-an4.93402.3010-0.265-0.19 0.19 0.28
Northwest Africa 1617Acapulcoite5.06001.8500-0.781-0.06 -0.27 -0.23
Old Homestead 003Howardite5.02002.3700-0.24-0.1 0.26 0.31
Zag (b)Winonaite4.84002.0600-0.457-0.28 -0.06 0.09
Northwest Africa 6023Brachinite-an5.11002.4020-0.255-0.01 0.29 0.29
Northwest Africa 10602Eucrite-melt breccia4.95202.3490-0.226-0.17 0.23 0.32
Northwest Africa 10637Brachinite5.04802.4020-0.223-0.07 0.29 0.32
Ooldea 014Achondrite-prim-ung5.04501.8280-0.795-0.08 -0.29 -0.25
Old Homestead 003Howardite4.88002.3000-0.238-0.24 0.19 0.31
El Médano 395Brachinite4.89702.3290-0.217-0.22 0.21 0.33
Northwest Africa 6023Brachinite-an4.83802.2690-0.247-0.28 0.15 0.3
Northwest Africa 6023Brachinite-an5.16202.4450-0.2390.04 0.33 0.31
Northwest Africa 2627Acapulcoite4.93001.8200-0.744-0.19 -0.3 -0.2
Northwest Africa 7904Brachinite4.78102.2100-0.276-0.34 0.09 0.27
Northwest Africa 6369Iron, IAB complex5.39002.3500-0.4530.27 0.24 0.1
Northwest Africa 2904Eucrite-pmict4.74002.1300-0.335-0.38 0.01 0.21
Northwest Africa 6023Brachinite-an5.22602.4910-0.2270.11 0.38 0.32
Jiddat al Harasis 556Howardite4.98002.4800-0.11-0.14 0.37 0.44
Northwest Africa 10851Winonaite5.43802.3450-0.4830.32 0.23 0.07
Northwest Africa 7605Brachinite4.82202.3700-0.137-0.3 0.26 0.41
Northwest Africa 2627Acapulcoite4.96001.7500-0.829-0.16 -0.37 -0.28
Northwest Africa 3151Brachinite4.86002.4200-0.107-0.26 0.31 0.44
Northwest Africa 2656Acapulcoite5.05001.7100-0.916-0.07 -0.41 -0.37
Thiel Mountains 07014Eucrite5.27002.5100-0.230.15 0.4 0.32
SilistraAchondrite-ung5.30002.5000-0.2560.18 0.39 0.29
Northwest Africa 2340CR25.37001.7700-1.0220.25 -0.35 -0.47
Northwest Africa 4042Achondrite-ung5.17802.5390-0.1540.06 0.42 0.39
Northwest Africa 4929Brachinite5.33002.4900-0.2820.21 0.38 0.27
Northwest Africa 2656Acapulcoite5.04001.6900-0.931-0.08 -0.43 -0.38
Northwest Africa 8059LL3.054.70202.2280-0.217-0.42 0.11 0.33
Al Huwaysah 010Achondrite-ung4.73002.3100-0.15-0.39 0.2 0.4
Northwest Africa 10637Brachinite4.79402.4050-0.088-0.33 0.29 0.46
Northwest Africa 10637Brachinite5.27302.5260-0.2160.15 0.41 0.33
Northwest Africa 11807Winonaite5.48702.3600-0.4930.37 0.25 0.05
Northwest Africa 10423Eucrite-cm4.69002.2300-0.209-0.43 0.12 0.34
Ooldea 014Achondrite-prim-ung5.55101.9820-0.9050.43 -0.13 -0.36
Northwest Africa 10497Brachinite4.67002.2200-0.208-0.45 0.11 0.34
Northwest Africa 5400Achondrite-ung4.88002.5250-0.013-0.24 0.41 0.54
Northwest Africa 6152Brachinite4.65002.2300-0.188-0.47 0.12 0.36
Dhofar 1983Lunar (feldsp. breccia)5.10002.6000-0.052-0.02 0.49 0.5
Northwest Africa 6152Brachinite4.65002.2400-0.178-0.47 0.13 0.37
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