| タイトル | Petrology, chemistry, age and irradiation history of Luna 24 samples |
| 著者（英） | Mcculloch, M. T.; Chodos, A. A.; Papanastassiou, D. A.; Albee, A. L.; Dymek, R. F.; Depaolo, D. J.; Huneke, J. C.; Wasserburg, G. J.; Radicati Di Brozolo, F. |
| 著者所属（英） | Consiglio Nazionale delle Ricerche|California Inst. of Tech. |
| 発行日 | 1978-01-01 |
| 言語 | eng |
| 内容記述 | The results of petrological, chemical, isotopic age determination and irradiation studies of sample 24170 from the 170 cm depth of the regolith core returned from Mare Crisium by Luna 24 are presented. The sample is found to be comprised of fragments from a single igneous rock, with mineralogical evidence indicating it to be a mare basalt. The crystallization age is determined by Sm-Nd and Ar(40)-Ar(39) ages to be 3.30 AE, establishing the presence of relatively young flows. All soil samples show low trace element compositions with minimum contamination by KREEPUTh-rich materials. Rb-Sr and Sm-Nd relations reflect the absence of significant fractionation at ages younger than 4.5 AE. One soil sample shows extremely large neutron capture effects, imposing a new lower limit to the neutron production rate in the regolith and requiring the addition of irradiated materials from depth. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 79A32543 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/427507 |
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