Oxygen Isotope Plots

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Meteoritical Bulletin: Oxygen Isotope Plots

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
4.8300	3.7110	1.1710	1.199
5.0320	3.8180	1.1710	1.201

Nearest neighbors in MBDB (within 0.5 permil):

Name	Class	δ¹⁸O	δ¹⁷O	Δ¹⁷O: calc	Δ δ¹⁸O	Δ δ¹⁷O	Δ Δ¹⁷O
Northwest Africa 7988	LL6	4.9140	3.7650	1.21	-0.02	0	0.01
Sayh al Uhaymir 565	LL3	4.9500	3.7700	1.196	0.02	0.01	-0
Northwest Africa 8417	LL7	4.9370	3.7890	1.222	0.01	0.02	0.02
Northwest Africa 8684	L6	4.9070	3.7380	1.186	-0.02	-0.03	-0.01
Northwest Africa 8417	LL7	4.8900	3.7290	1.186	-0.04	-0.04	-0.01
Northwest Africa 11575	Achondrite-ung	4.8750	3.7600	1.225	-0.06	-0	0.02
Clarendon (c)	L4	4.9500	3.7020	1.128	0.02	-0.06	-0.07
Northwest Africa 10103	LL7	4.9430	3.8340	1.264	0.01	0.07	0.06
Northwest Africa 11745	L5	4.9310	3.6930	1.129	0	-0.07	-0.07
Sayh al Uhaymir 564	L3	4.9020	3.6970	1.148	-0.03	-0.07	-0.05
Sayh al Uhaymir 565	LL3	4.9410	3.6710	1.102	0.01	-0.09	-0.1
Northwest Africa 7660	LL-melt rock	4.9640	3.8740	1.293	0.03	0.11	0.09
Northwest Africa 8417	LL7	5.0200	3.8620	1.252	0.09	0.1	0.05
Northwest Africa 6698	Achondrite-ung	4.8000	3.7200	1.224	-0.13	-0.04	0.02
Clarendon (c)	L4	4.8270	3.6730	1.163	-0.1	-0.09	-0.04
Mifflin	L5	4.8400	3.6500	1.133	-0.09	-0.11	-0.07
Aba Panu	L3	4.9800	3.6250	1.035	0.05	-0.14	-0.16
Northwest Africa 6426	LL7	4.7800	3.7400	1.254	-0.15	-0.02	0.05
Northwest Africa 8649	LL3.05	5.0940	3.7130	1.064	0.16	-0.05	-0.14
Clarendon (c)	L4	4.8550	3.6110	1.086	-0.08	-0.15	-0.11
Northwest Africa 8257	L3.15	4.8400	3.6150	1.098	-0.09	-0.15	-0.1
Aba Panu	L3	5.0890	3.6840	1.038	0.16	-0.08	-0.16
Katol	L6	4.8670	3.5960	1.065	-0.06	-0.17	-0.14
Northwest Africa 7556	L4-6	5.0430	3.6180	0.996	0.11	-0.15	-0.2
Northwest Africa 6698	Achondrite-ung	4.7300	3.7500	1.29	-0.2	-0.01	0.09
Northwest Africa 11744	L5	5.1390	3.7780	1.106	0.21	0.01	-0.09
Katol	L6	4.9610	3.5490	0.969	0.03	-0.22	-0.23
Northwest Africa 12379	Chondrite-ung	5.1400	3.6900	1.017	0.21	-0.07	-0.18
Northwest Africa 6426	LL7	4.7200	3.6800	1.226	-0.21	-0.08	0.03
Aba Panu	L3	5.1600	3.7240	1.041	0.23	-0.04	-0.16
Renchen	L5-6	4.7400	3.6300	1.165	-0.19	-0.13	-0.04
Jiddat al Harasis 089	OC	5.1700	3.7800	1.092	0.24	0.02	-0.11
Patuxent Range 91501	L7	4.7000	3.7000	1.256	-0.23	-0.06	0.06
Northwest Africa 6485	LL-melt rock	5.1500	3.8700	1.192	0.22	0.11	-0.01
Catalina 001	L3	5.1510	3.6550	0.976	0.22	-0.11	-0.22
Northwest Africa 7988	LL6	5.1550	3.8730	1.192	0.22	0.11	-0.01
Sayh al Uhaymir 564	L3	4.7510	3.5620	1.091	-0.18	-0.2	-0.11
Northwest Africa 2979	L/LL-melt rock	4.6900	3.6400	1.201	-0.24	-0.12	0
Northwest Africa 10103	LL7	5.1750	3.8850	1.194	0.24	0.12	-0.01
Northwest Africa 11253	L-melt rock	5.1920	3.8430	1.143	0.26	0.08	-0.06
Northwest Africa 8709	L3-melt breccia	5.0330	3.4820	0.865	0.1	-0.28	-0.34
Viñales	L6	4.6900	3.5700	1.131	-0.24	-0.19	-0.07
Northwest Africa 2979	L/LL-melt rock	4.6600	3.6100	1.187	-0.27	-0.15	-0.01
Dhofar 2056	L3	4.7400	4.0310	1.566	-0.19	0.27	0.37
Northwest Africa 6744	L3	5.0500	3.4300	0.804	0.12	-0.33	-0.4
Northwest Africa 869	L3-6	4.6700	3.5200	1.092	-0.26	-0.24	-0.11
Northwest Africa 8684	L6	5.2430	3.9430	1.217	0.31	0.18	0.02
Northwest Africa 10786	LL3	5.2800	3.6600	0.914	0.35	-0.1	-0.29
Northwest Africa 12273	Chondrite-ung	5.2580	3.9390	1.205	0.33	0.17	0
Northwest Africa 6503	LL6	5.2570	3.9450	1.211	0.33	0.18	0.01
Northwest Africa 11042	Achondrite-prim	4.6400	3.5200	1.107	-0.29	-0.24	-0.09
Northwest Africa 6745	L3	5.2600	3.5400	0.805	0.33	-0.22	-0.4
Northwest Africa 4864	Martian (shergottite)	5.1000	3.4000	0.748	0.17	-0.36	-0.45
Northwest Africa 12534	LL7	5.2880	3.9880	1.238	0.36	0.22	0.04
Vicência	LL3.2	5.3590	3.7680	0.981	0.43	0	-0.22
Northwest Africa 8684	L6	5.3100	3.9640	1.203	0.38	0.2	0
Northwest Africa 4531	OC3	5.2500	3.4700	0.74	0.32	-0.29	-0.46
Northwest Africa 4226	H7	4.9500	3.3300	0.756	0.02	-0.43	-0.44
Northwest Africa 8691	LL4-6	5.3490	3.8920	1.111	0.42	0.13	-0.09
Northwest Africa 6486	L-melt rock	4.5910	3.4890	1.102	-0.34	-0.28	-0.1
Bensour	LL6	5.3000	4.0000	1.244	0.37	0.24	0.04
Northwest Africa 969	LL6/7	5.3000	4.0000	1.244	0.37	0.24	0.04
Northwest Africa 3161	OC3	5.3400	3.9300	1.153	0.41	0.17	-0.05
Northwest Africa 10084	L-imp melt	4.5670	3.5010	1.126	-0.36	-0.26	-0.07
Northwest Africa 7556	L4-6	5.3670	3.8820	1.091	0.44	0.12	-0.11
Northwest Africa 10954	L4	4.6630	3.3990	0.974	-0.27	-0.37	-0.23
Northwest Africa 4864	Martian (shergottite)	5.3000	3.5000	0.744	0.37	-0.26	-0.46
Northwest Africa 3320	LL6-melt breccia	5.3500	3.9400	1.158	0.42	0.18	-0.04
Northwest Africa 8258	L3	5.0980	3.3390	0.688	0.17	-0.43	-0.51
Jiddat al Harasis 567	H3.6	5.2700	3.4500	0.71	0.34	-0.31	-0.49
Viñales	L6	4.5500	3.5000	1.134	-0.38	-0.26	-0.07
Northwest Africa 10774	L3	5.3900	3.8400	1.037	0.46	0.08	-0.16
Northwest Africa 3157	OC3	5.3000	3.4800	0.724	0.37	-0.28	-0.48
Northwest Africa 8649	LL3.05	5.0220	3.3000	0.689	0.09	-0.46	-0.51
Northwest Africa 12534	LL7	5.3450	4.0090	1.23	0.41	0.24	0.03
Northwest Africa 3157	OC3	4.8500	3.2900	0.768	-0.08	-0.47	-0.43
Northwest Africa 11575	Achondrite-ung	5.3490	4.0060	1.225	0.42	0.24	0.02
Northwest Africa 6503	LL6	5.3400	4.0240	1.247	0.41	0.26	0.05
El Médano 301	Chondrite-ung	5.3800	3.5800	0.782	0.45	-0.18	-0.42
Northwest Africa 8124	LL3	5.1900	3.3480	0.649	0.26	-0.42	-0.55

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