Table 1 Oxygen isotopic compositions of Ryugu samples and carbonaceous chondrites

From: Oxygen isotope evidence from Ryugu samples for early water delivery to Earth by CI chondrites

Sample	Mass (mg)	µg O₂	Percentage Yield	Method	N*	δ¹⁷O	±2SD	δ¹⁸O	±2SD	Δ¹⁷O	±2SD
Hayabusa2 data
C0014-1	0.78	132	nd	B	60	10.72	0.16	19.30	0.07	0.68	0.14
C0014-2	0.52	89	nd	M	40	8.60	0.11	15.23	0.19	0.68	0.03
C0014-3	0.18	31	nd	M	60	7.69	0.04	13.73	0.08	0.54	0.02
C0014-4*	1.83	311	nd	B	40	9.23	0.09	16.47	0.03	0.67	0.09
C0068	0.5	85	17.00	M	30	7.07	0.06	12.38	0.09	0.63	0.01
C0087	0.29	50	nd	M	60	8.85	0.11	15.57	0.22	0.75	0.03
A0098	0.26	44	nd	M	40	6.52	0.11	11.46	0.12	0.56	0.06
TOTAL	4.36	742
Mean value (unweighted)						8.38	2.84	14.88	5.29	0.64	0.14
Mean value (weighted)						8.92	2.58	15.88	4.85	0.66	0.09
CY Chondrites
Y-82162,82 *	1.03	104	10.09	B	40	12.50	0.06	23.06	0.05	0.50	0.07
Y-82162,82 *	0.93	95	10.24	B	40	13.24	0.12	24.47	0.18	0.52	0.05
Y-82162,82 *	0.80	104	13.07	B	40	12.29	0.10	22.97	0.07	0.34	0.09
Y-82162,82 *	0.71	94	13.17	B	40	11.68	0.18	21.56	0.26	0.46	0.09
Y-82162,82 *	0.56	85	15.29	B	40	11.25	0.10	20.77	0.11	0.45	0.11
Y-82162,82 *	0.63	65	10.25	M	20	12.51	0.04	23.12	0.06	0.49	0.02
Y-82162,82 *	0.45	56	12.56	M	20	12.60	0.03	23.38	0.01	0.44	0.04
TOTAL	5.11	603
Mean value (unweighted)						12.29	1.30	22.76	2.45	0.46	0.12
Mean value (weighted)						12.28	1.32	22.75	2.48	0.46	0.13
B-7904	2.16	495	22.90	B	40	11.08	0.030	21.37	0.030	-0.03	0.020
CI Chondrites
Orgueil*	1.30	301	23.24	B	40	8.81	0.05	15.78	0.03	0.61	0.03
Orgueil*	1.58	364	23.05	B	40	9.23	0.01	16.59	0.02	0.61	0.01
Orgueil*	1.10	261	23.79	B	40	9.14	0.04	16.44	0.03	0.59	0.04
Orgueil*	1.44	321	22.29	B	40	8.00	0.03	14.39	0.02	0.52	0.03
Orgueil*	0.60	221	36.83	B	40	8.34	0.05	14.79	0.03	0.64	0.05
Orgueil*	0.60	132	22.00	M	40	8.12	0.12	14.56	0.04	0.55	0.12
Orgueil*	1.74	394	22.64	B	30	8.93	0.03	16.14	0.02	0.54	0.03
Orgueil**	2.38	695	29.20	B	30	9.24	0.02	16.62	0.02	0.60	0.01
Orgueil**	2.33	553	23.73	B	30	8.41	0.02	15.04	0.01	0.59	0.02
TOTAL	13.06	3242
Mean value (unweighted)						8.69	0.97	15.59	1.81	0.58	0.08
Mean value (weighted)						8.78	0.94	15.77	1.76	0.58	0.07
Ivuna	2.06	270	13.09	B	40	8.55	0.03	15.67	0.01	0.41	0.02
Ivuna	2.18	451	20.74	B	40	9.52	0.02	17.51	0.03	0.42	0.03
TOTAL	4.24	721
Mean value (unweighted)						9.04	1.36	16.59	2.60	0.41	0.01
Mean value (weighted)						9.17	1.32	16.82	2.52	0.41	0.01
Alais	2.03	377	18.58	B	40	7.60	0.04	13.46	0.01	0.60	0.05
Alais	2.27	471	20.73	B	40	7.08	0.03	12.46	0.05	0.60	0.01
TOTAL	4.30	848
Mean value (unweighted)						7.34	0.73	12.96	1.42	0.60	0.01
Mean value (weighted)						7.31	0.72	12.91	1.41	0.60	0.01
CI mean value***						8.42	1.96	15.16	4.05	0.53	0.21

NOTES
All analyses this study except *from Ito et al.⁷ and ** from Greenwood et al.⁶.
^$mass was estimated based on measured 17% yield for particle C68 - see methods for further details.
BA = Bellows analysis; M = microvolume.
N* = Total number of sample/reference gas comparisons.
Quoted errors are 2SD based on the compositions calculated for each block of 10 sample to reference gas comparisons.
*** CI mean calculated is the average of the weighted mean values for Orgueil, Ivuna and Alais.

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Table 1 Oxygen isotopic compositions of Ryugu samples and carbonaceous chondrites

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