Identification and new discovery to the Apollo 11 lunar soil using SIMS U-Pb analyses
文献类型：期刊论文
| 作者 | Li QiuLi2,3; Liu Yu3; Li JinHua1; Chen Yi2,3; Li XianHua2,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 38期号:6页码:1804-1810 |
| 关键词 | Lunar soil Apollo 11 Ion probe U-Pb system Magnesian suite |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2022.06.17 |
| 英文摘要 | This paper reports the dating of basalt clasts from an Apollo lunar soil sample (E21) collected in the Geological Museum, the Institute of Geology and Geophysics, Chinese Academy of Sciences. Due to the small size of the clasts, the previous method of constructing conventional Pb-Pb isochron with a single rock chip to determine the age of Apollo samples cannot be used. We have adopted the technical method of defining the age of basalt clasts with a single Zr-bearing mineral (baddeleyite, zirconolite and tranquillityite). Firstly, the rock clasts with Zr-bearing minerals are selected according to the X-ray penetration of mu-XRF. Secondly, the resin sample target is made for fine polishing. The Zr-bearing minerals exposed to the surface are located by means of scanning electron microscope Zr signal mapping. Lastly, the Pb isotopic compositions of Zr-bearing minerals were obtained by the analysis technology of ion probe similar to 31 mu m beam spot and a multi-collection mode for Pb signal to calculate the age. Four age groups of rocks were identified, namely 3570 +/- 14Ma, 3700 +/- 8Ma, 3850 +/- 5Ma and 3900 +/- 12Ma. The first three ages are consistent with the age distribution of basalt in Apollo 11 lunar soil, so it can be determined that this sample is from Apollo 11 lunar soil. The last one is a newly discovered component. According to the composition of feldspar (An = 93) and pyroxene (Mg-# similar to 79) , it is identified as magnesian suite origin norite. In addition, according to the Pb isotope analysis of the main minerals, the vast majority of basalt class fall on the Pb-Pb isochron of similar to 3570Ma, indicating that this period of basalt is the main volcanic activity event in the Apollo 11 sampling area, which provides a basis for the age selection on the dating curve of the crater-counting chronology. |
| WOS关键词 | VOLCANISM ; AGE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000826244200017 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/108451]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Li QiuLi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li QiuLi,Liu Yu,Li JinHua,et al. Identification and new discovery to the Apollo 11 lunar soil using SIMS U-Pb analyses[J]. ACTA PETROLOGICA SINICA,2022,38(6):1804-1810. |
| APA | Li QiuLi,Liu Yu,Li JinHua,Chen Yi,&Li XianHua.(2022).Identification and new discovery to the Apollo 11 lunar soil using SIMS U-Pb analyses.ACTA PETROLOGICA SINICA,38(6),1804-1810. |
| MLA | Li QiuLi,et al."Identification and new discovery to the Apollo 11 lunar soil using SIMS U-Pb analyses".ACTA PETROLOGICA SINICA 38.6(2022):1804-1810. |
入库方式： OAI收割
来源：地质与地球物理研究所
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