Oxygen Isotope Plots

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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:

Clayton R. N. and Mayeda T. K. (1999) Oxygen isotope studies of carbonaceous chondrites. Geochim. Cosmochim. Acta 63, 2089-2017 (link)
Clayton R. N. and Mayeda T. K. (1999) Oxygen isotope studies of carbonaceous chondrites. Geochim. Cosmochim. Acta 63, 2089-2017 (link)
Clayton R. N., Onuma N., Grossman L. and Mayeda T. K. (1977) Distribution of the pre-solar component in Allende and other carbonaceous chondrites. Earth Planet. Sci. Lett. 34, 209-224 (link)
Franchi I. A., Wright I. P., Sexton A. S. and Pillinger C. T. (1999) The oxygen-isotopic composition of Earth and Mars. Meteorit. Planet. Sci. 34, 657-661. (link)
Greenwood R.C., Franchi I.A., Gibson J.M. and Benedix G.K. (2012) Oxygen isotope variation in primitive achondrites: The influence of primordial, asteroidal and terrestrial processes. Geochim. Cosmochim. Acta 94, 146-163. (link)
Greenwood R.C., Franchi I.A., Gibson J.M. and Benedix G.K. (2012) Oxygen isotope variation in primitive achondrites: The influence of primordial, asteroidal and terrestrial processes. Geochim. Cosmochim. Acta 94, 146-163. (link)
Young E. D. and Russell S. S. (1998) Oxygen reservoirs in the early solar nebula inferred from an Allende CAI. Science 282, 452-455 (link)

Data summary:

δ¹⁸O	δ¹⁷O	Δ¹⁷O: given	Δ¹⁷O: linear	Comment
4.5410	1.8760	-0.4860	-0.485

Nearest neighbors in MBDB (within 0.5 permil):

Name	Class	δ¹⁸O	δ¹⁷O	Δ¹⁷O: calc	Δ δ¹⁸O	Δ δ¹⁷O	Δ Δ¹⁷O
Acfer 366	CH3	4.6100	1.7810	-0.616	0.07	-0.1	-0.13
Northwest Africa 12543	Winonaite	4.6620	1.8800	-0.544	0.12	0	-0.06
Northwest Africa 4937	Winonaite	4.3700	1.7630	-0.509	-0.17	-0.11	-0.02
Northwest Africa 12951	Winonaite	4.7300	1.9690	-0.491	0.19	0.09	-0.01
Allan Hills 12073	Eucrite	4.4000	2.0400	-0.248	-0.14	0.16	0.24
Northwest Africa 4882	Brachinite	4.4550	2.0950	-0.222	-0.09	0.22	0.26
Northwest Africa 4882	Brachinite	4.4550	2.0950	-0.222	-0.09	0.22	0.26
Northwest Africa 6484	Lodranite	4.5420	1.6350	-0.727	0	-0.24	-0.24
Northwest Africa 12397	Mesosiderite	4.3230	1.9920	-0.256	-0.22	0.12	0.23
Northwest Africa 3213	Mesosiderite	4.5500	2.1300	-0.236	0.01	0.25	0.25
Northwest Africa 739	CH3	4.3200	1.7500	-0.496	-0.22	-0.13	-0.01
Northwest Africa 4882	Brachinite	4.3680	2.0640	-0.207	-0.17	0.19	0.28
Northwest Africa 4882	Brachinite	4.3680	2.0640	-0.207	-0.17	0.19	0.28
Northwest Africa 7025	Mesosiderite	4.3870	2.0820	-0.199	-0.15	0.21	0.29
Northwest Africa 4395	Diogenite	4.3900	2.0900	-0.193	-0.15	0.21	0.29
Northwest Africa 4872	Brachinite	4.3540	2.0610	-0.203	-0.19	0.19	0.28
Northwest Africa 4872	Brachinite	4.3540	2.0610	-0.203	-0.19	0.19	0.28
Northwest Africa 8659	Eucrite	4.3760	2.0830	-0.193	-0.17	0.21	0.29
Northwest Africa 4636	Mesosiderite	4.3800	2.0900	-0.188	-0.16	0.21	0.3
Northwest Africa 4418	Mesosiderite	4.5240	2.1450	-0.207	-0.02	0.27	0.28
Northwest Africa 4872	Brachinite	4.3080	2.0120	-0.228	-0.23	0.14	0.26
Northwest Africa 4872	Brachinite	4.3080	2.0120	-0.228	-0.23	0.14	0.26
Ramlat as Sahmah 309	Brachinite	4.3700	2.0900	-0.182	-0.17	0.21	0.3
Northwest Africa 2904	Eucrite-pmict	4.5800	2.1600	-0.222	0.04	0.28	0.26
El Médano 395	Brachinite	4.2900	2.0200	-0.211	-0.25	0.14	0.27
Los Vientos 263	Pallasite, ungrouped	4.3400	2.0900	-0.167	-0.2	0.21	0.32
Northwest Africa 1500	Achondrite-ung	4.5600	1.5800	-0.791	0.02	-0.3	-0.31
El Médano 395	Brachinite	4.5820	2.1700	-0.213	0.04	0.29	0.27
Fortuna	Winonaite	4.6800	1.6100	-0.824	0.14	-0.27	-0.34
Northwest Africa 2627	Acapulcoite	4.5100	1.5600	-0.785	-0.03	-0.32	-0.3
Northwest Africa 2904	Eucrite-pmict	4.7400	2.1300	-0.335	0.2	0.25	0.15
Jiddat al Harasis 395	Diogenite	4.2300	1.9900	-0.21	-0.31	0.11	0.28
Zag (b)	Winonaite	4.8400	2.0600	-0.457	0.3	0.18	0.03
Northwest Africa 6690	Diogenite	4.1900	1.9400	-0.239	-0.35	0.06	0.25
Northwest Africa 4937	Winonaite	4.2060	1.7380	-0.449	-0.34	-0.14	0.04
Northwest Africa 10497	Brachinite	4.6700	2.2200	-0.208	0.13	0.34	0.28
Northwest Africa 10424	Eucrite-cm	4.1800	1.9500	-0.224	-0.36	0.07	0.26
Northwest Africa 6152	Brachinite	4.6500	2.2300	-0.188	0.11	0.35	0.3
Northwest Africa 6152	Brachinite	4.6500	2.2400	-0.178	0.11	0.36	0.31
Northwest Africa 10423	Eucrite-cm	4.6900	2.2300	-0.209	0.15	0.35	0.28
Northwest Africa 12951	Winonaite	4.8870	2.0490	-0.492	0.35	0.17	-0.01
Northwest Africa 8059	LL3.05	4.7020	2.2280	-0.217	0.16	0.35	0.27
Northwest Africa 2627	Acapulcoite	4.9300	1.8200	-0.744	0.39	-0.06	-0.26
Northwest Africa 12338	Achondrite-ung	4.1600	1.9800	-0.183	-0.38	0.1	0.3
Northwest Africa 12004	Angrite	4.4400	2.2580	-0.051	-0.1	0.38	0.43
Northwest Africa 7025	Mesosiderite	4.1490	1.9610	-0.196	-0.39	0.09	0.29
Northwest Africa 2627	Acapulcoite	4.5100	1.4700	-0.875	-0.03	-0.41	-0.39
Northwest Africa 12004	Angrite	4.2840	2.1970	-0.031	-0.26	0.32	0.45
Northwest Africa 7904	Brachinite	4.7810	2.2100	-0.276	0.24	0.33	0.21
Northwest Africa 12320	Angrite	4.4160	2.2680	-0.028	-0.13	0.39	0.46
Northwest Africa 11264	Eucrite	4.1300	1.9300	-0.218	-0.41	0.05	0.27
Northwest Africa 12540	Eucrite-an	4.1200	1.9090	-0.233	-0.42	0.03	0.25
Northwest Africa 4399	Acapulcoite	4.8700	1.6100	-0.922	0.33	-0.27	-0.44
Northwest Africa 12004	Angrite	4.4310	2.2850	-0.019	-0.11	0.41	0.47
Northwest Africa 12320	Angrite	4.4070	2.2810	-0.011	-0.13	0.41	0.47
Northwest Africa 6474	Brachinite	4.2340	2.1810	-0.021	-0.31	0.31	0.46
Northwest Africa 2627	Acapulcoite	4.9600	1.7500	-0.829	0.42	-0.13	-0.34
Northwest Africa 2999	Angrite	4.1540	2.0950	-0.065	-0.39	0.22	0.42
Northwest Africa 5363	Achondrite-ung	4.1830	2.1520	-0.023	-0.36	0.28	0.46
Northwest Africa 12320	Angrite	4.5450	2.3390	-0.024	0	0.46	0.46
Ramlat as Sahmah 511	Eucrite	4.0800	1.9200	-0.202	-0.46	0.04	0.28
Jiddat al Harasis 845	Mesosiderite-C2	4.0770	1.9380	-0.182	-0.46	0.06	0.3
Thiel Mountains 07009	EL6	4.2100	2.2100	0.021	-0.33	0.33	0.51
Al Huwaysah 010	Achondrite-ung	4.7300	2.3100	-0.15	0.19	0.43	0.34
Northwest Africa 2177	Eucrite	4.0600	1.8900	-0.221	-0.48	0.01	0.26
Northwest Africa 2999	Angrite	4.0930	2.0540	-0.074	-0.45	0.18	0.41
Yamato 980110	Ureilite	4.6000	1.3900	-1.002	0.06	-0.49	-0.52
Tindouf 005	Eucrite-pmict	4.0500	1.8900	-0.216	-0.49	0.01	0.27
Northwest Africa 6023	Brachinite-an	4.8380	2.2690	-0.247	0.3	0.39	0.24
Northwest Africa 5400	Achondrite-ung	4.4860	2.3670	0.034	-0.06	0.49	0.52
Jiddat al Harasis 845	Mesosiderite-C2	4.0450	1.9290	-0.174	-0.5	0.05	0.31

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