The nature of the L chondrite parent body's disruption as deduced from high-pressure phases in the Sixiangkou L6 chondrite
文献类型：期刊论文
| 作者 | Li, Shaolin1,2; Hsu, Weibiao1,3 |
| 刊名 | METEORITICS & PLANETARY SCIENCE
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 53期号:10页码:2107-2121 |
| ISSN号 | 1086-9379 |
| DOI | 10.1111/maps.13110 |
| 通讯作者 | Hsu, Weibiao(wbxu@pmo.ac.cn) |
| 英文摘要 | The disruption of the L chondrite parent body (LCPB) at similar to 470Ma is currently the best-documented catastrophic celestial impact event, based on the large number of L chondritic materials associated with this event. Uranium-lead (U-Pb) dating of apatite and its high-pressure decomposition product, tuite, in the Sixiangkou L6 chondrite provides a temporal link to this event. The U-Pb system of phosphates adjacent to shock melt veins was altered to varying degrees and the discordance of the U-Pb system correlates closely with the extent of apatite decomposition. This suggests that the U-Pb system of apatite could be substantially disturbed by high-temperature pulse during shock compression from natural impacts, at least on the scale of mineral grains. Although many L chondrites can be temporally related to the catastrophic LCPB impact event, the shock conditions experienced by each individual meteorite vary. This could be due to the different geologic settings of these meteorites on their parent body. The shock pressure and duration derived from most meteorites may only reflect local shock features rather than the impact conditions, although they could provide lower limits to the impact conditions. The Sixiangkou shock duration (similar to 4s), estimated from high-pressure transformation kinetics, provides a lower limit to the high-pressure pulse of the LCPB disruption impact. Combined with available literature data of L chondrites associated with this impact event, our results suggest that the LCPB suffered a catastrophic collision with a large projectile (with a diameter of at least 18-22km) at a low impact velocity (5-6kms(-1)). This is consistent with astronomical estimates based on the dynamical evolution of L chondritic asteroids. |
| WOS关键词 | U-PB ; ASTEROID BREAKUP ; ISOTOPE SYSTEMATICS ; TERRESTRIAL IMPACT ; SHOCK METAMORPHISM ; MA DISRUPTION ; METEORITE ; ORDOVICIAN ; EVENTS ; AGES |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000446173000005 |
| 出版者 | WILEY |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/21289]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Hsu, Weibiao |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shaolin,Hsu, Weibiao. The nature of the L chondrite parent body's disruption as deduced from high-pressure phases in the Sixiangkou L6 chondrite[J]. METEORITICS & PLANETARY SCIENCE,2018,53(10):2107-2121. |
| APA | Li, Shaolin,&Hsu, Weibiao.(2018).The nature of the L chondrite parent body's disruption as deduced from high-pressure phases in the Sixiangkou L6 chondrite.METEORITICS & PLANETARY SCIENCE,53(10),2107-2121. |
| MLA | Li, Shaolin,et al."The nature of the L chondrite parent body's disruption as deduced from high-pressure phases in the Sixiangkou L6 chondrite".METEORITICS & PLANETARY SCIENCE 53.10(2018):2107-2121. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。