Table 2 Isotope ratios in phosphates for Itokawa particles and unshocked LL chondrites.
From: Thermal and impact histories of 25143 Itokawa recorded in Hayabusa particles
Grain No. | Spot No. | Mineral | U (p.p.m.) | 238U/206Pb | 207Pb/206Pb | 204Pb/206Pb |
|---|---|---|---|---|---|---|
RA-QD02-0056 | 0717_1 | apatite | 2.9 | 0.2405 ± 0.0310 | 0.8144 ± 0.0839 | 0.0270 ± 0.0079 |
RA-QD02-0056 | 0717_4 | apatite | 2.9 | 0.4241 ± 0.1913 | 0.8149 ± 0.1572 | 0.1251 ± 0.0487 |
RA-QD02-0056 | 0718_1 | apatite | 4.0 | 0.1809 ± 0.0216 | 0.7917 ± 0.0815 | 0.0298 ± 0.0073 |
RA-QD02-0056 | 0718_2 | apatite | 4.0 | 0.2878 ± 0.0859 | 0.7016 ± 0.2542 | 0.0302 ± 0.0340 |
RA-QD02-0056 | 0718_3 | apatite | 3.7 | 0.8375 ± 0.1959 | 0.6527 ± 0.0830 | 0.0007 ± 0.0022 |
RA-QD02-0056 | 0718_5 | apatite | 6.6 | 0.3992 ± 0.1080 | 0.6545 ± 0.1797 | 0.0128 ± 0.0179 |
RA-QD02-0031 | 0717_3 | whitlockite | 0.047 | 0.0266 ± 0.1047 | 1.0000 ± 1.0092 | 0.1133 ± 0.1931 |
RB-CV-0025 | 1218_1 | whitlockite | 0.201 | 0.6720 ± 0.2970 | 0.7690 ± 0.3380 | 0.0385 ± 0.0392 |
RB-CV-0025 | 1218_2 | whitlockite | 0.240 | 0.5760 ± 0.2710 | 0.6920 ± 0.5410 | 0.1540 ± 0.1170 |
RB-QD04-0025 | 0811_3 | whitlockite | 0.123 | 1.3301 ± 0.3132 | 0.6038 ± 0.1052 | 0.0755 ± 0.0391 |
RB-QD04-0025 | 0812_1 | whitlockite | 0.282 | 0.8570 ± 0.5160 | 0.7500 ± 0.1164 | 0.0357 ± 0.0263 |
from Göpel et al.13 | ||||||
St. Severin (LL6) | 0.44 | 0.96021 ± 0.02528 | 0.63590 ± 0.00041 | 0.00370 ± 0.00007 | ||
Guidder (LL5) | 0.23 | 0.97578 ± 0.17499 | 0.61456 ± 0.00047 | 0.00069 ± 0.00009 | ||
Tuxtuac (LL5) | 0.42 | 0.96693 ± 0.10284 | 0.62380 ± 0.00100 | 0.00195 ± 0.00014 | ||
