Table 1.
Oxygen-isotope ratios of chondrule-like objects and CAIs in the Ryugu samplesa
| Sample name | Spot# | δ18O | 2SD (‰) | δ17O | 2SD (‰) | Δ17O | 2SD (‰) | Targetb |
|---|---|---|---|---|---|---|---|---|
| C0002-P5-C1-Chd | 1 | 2.6 | 2.0 | −2.5 | 7.9 | −3.8 | 8.5 | Ol (Fo98.6) |
| 2 | −1.4 | 2.0 | −3.7 | 7.9 | −3.0 | 8.5 | Ol | |
| Average | 0.6 | 3.9 | −3.1 | 5.6 | −3.4 | 6.0 | ||
| C0002-P5-C2-Chd | 1 | −39.8 | 2.0 | −43.6 | 7.9 | −22.9 | 8.5 | Ol (Fo98.9) |
| 2 | −47.5 | 2.0 | −47.8 | 7.9 | −23.1 | 8.5 | Ol | |
| Average | −43.6 | 7.7 | −45.7 | 5.6 | −23.0 | 6.0 | ||
| C0040-02-Chd | 1 | −44.4 | 1.3 | −46.0 | 5.4 | −22.9 | 5.2 | Ol (Fo99.7) |
| C0040-02-CAI | 1 | −39.1 | 2.4 | −46.5 | 4.8 | −26.1 | 4.1 | Hib |
| 2 | −43.1 | 2.4 | −42.7 | 4.8 | −20.2 | 4.1 | Sp | |
| 3 | −42.5 | 2.4 | −44.0 | 4.8 | −21.9 | 4.1 | Sp | |
| 4 | −43.1 | 2.4 | −44.2 | 4.8 | −21.8 | 4.1 | Sp | |
| Average | −42.0 | 1.9 | −44.3 | 2.4 | −22.5 | 2.5 | ||
| C0076-10-CAI | 1 | −44.0 | 1.3 | −46.3 | 5.4 | −23.4 | 5.2 | Sp |
| 2 | −40.3 | 1.3 | −46.0 | 5.4 | −25.1 | 5.2 | Sp | |
| Average | −42.1 | 3.7 | −46.1 | 3.8 | −24.2 | 3.6 |
aThe uncertainties associated with average values are twice the standard error of the mean (2SE).
bAverage (or representative) chemical compositions are shown.