Discovery of probable Tunguska cosmic body material: anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)
文献类型：期刊论文
| 作者 | Hou, QL; Kolesnikov, EM; Xie, LW; Zhou, MF; Sun, M; Kolesnikova, NV |
| 刊名 | PLANETARY AND SPACE SCIENCE
 |
| 出版日期 | 2000-12-01 |
| 卷号 | 48期号:15页码:1447-1455 |
| 关键词 | Tunguska explosion PGE REE element anomalies ICP-MS |
| ISSN号 | 0032-0633 |
| 文献子类 | Article |
| 英文摘要 | Ten Spagnum fuscum peat samples collected from different depths of a core including the layer affected by the 1908 Tunguska explosion in the Tunguska area of Central Siberia, Russia, were analyzed by ICP-MS to determine the concentrations of Pd, Rh, Ru, Co, REE, Y, Sr, and Sc. The analytical results indicate that the Pd and Rh concentrations in the event- and lower layers were 14.0-19.9, and 1.23-1.56 ppb, respectively, about 3-9 times and 3 times higher than the background values in the normal layers. In addition, the patterns of CI-chondrite-normalized REE in the event layers were much flatter than in the normal layers, and differed from those in the nearby traps. Hence, it can be inferred from the characteristics of the elemental geochemistry that the explosion was probably associated with extraterrestrial material, and which, most probably, was a small comet core the dust fraction of which was chemically similar to carbonaceous chondrites (CI). In terms of the Pd and REE excess fluxes in the explosion area, it can be estimated that the celestial body that exploded over Tunguska in 1908 weighed more than 10(6) t, corresponding to a radius of > 60 m. If the celestial body was a comet, then its total mass was more than 2 x 10(7) t, and it had > 160 m radius, and released an energy of > 10(7) t TNT. (C) 2000 Elsevier Science Ltd. All rights reserved. |
| WOS关键词 | ISOTOPIC ANOMALIES ; METEORITE ; EXTINCTION ; IRIDIUM ; SEARCH ; TRACES ; IMPACT ; MATTER ; DUST ; ICE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000166163300004 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75750]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Hou, QL |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Lab Lithosphere Tecton Evolut, Beijing 100029, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Moscow MV Lomonosov State Univ, Geol Fac, Moscow 119899, Russia |
| 推荐引用方式 GB/T 7714 | Hou, QL,Kolesnikov, EM,Xie, LW,et al. Discovery of probable Tunguska cosmic body material: anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)[J]. PLANETARY AND SPACE SCIENCE,2000,48(15):1447-1455. |
| APA | Hou, QL,Kolesnikov, EM,Xie, LW,Zhou, MF,Sun, M,&Kolesnikova, NV.(2000).Discovery of probable Tunguska cosmic body material: anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908).PLANETARY AND SPACE SCIENCE,48(15),1447-1455. |
| MLA | Hou, QL,et al."Discovery of probable Tunguska cosmic body material: anomalies of platinum group elements and rare-earth elements in peat near the Explosion Site (1908)".PLANETARY AND SPACE SCIENCE 48.15(2000):1447-1455. |
入库方式： OAI收割
来源：地质与地球物理研究所
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