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  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院地球与行星物理重点实验室
Spatial distribution of isotopes and compositional mixing in the inner protoplanetary disk

文献类型：期刊论文

作者Shuai, Kang2,3; Hui, Hejiu2,3,4,5; Zhou, Li-Yong1; Li, Weiqiang2,3,4
刊名ASTRONOMY & ASTROPHYSICS
出版日期2023-04-26
卷号673页码:13
ISSN号0004-6361
关键词planets and satellites composition formation protoplanetary disks
DOI10.1051/0004-6361/202245341
英文摘要The mass-independent isotopic signatures of planetary bodies have been widely used to trace the mixing process that occurred during planet formation. The observed isotopic variations among meteorite parent bodies have been further linked to the modeled mass-weighted mean initial semimajor axes in N-body simulations, assuming a spatial isotopic gradient in the inner protoplanetary disk. However, nucleosynthetic isotopic anomalies of nonvolatile elements and mass-independent oxygen isotopic variation ( increment O-17) show different relationships with distance from the Sun. Therefore, it is crucial to know whether isotopes were distributed systematically with heliocentric distance in the inner protoplanetary disk. In this study, we performed N-body simulations on compositional mixing during the collisional accretion and migration of planetary bodies to investigate the spatial distributions of Cr and O isotopes in the inner protoplanetary disk. The modeled mass-weighted mean initial semimajor axes of the parent bodies of noncarbonaceous (NC) meteorites and terrestrial planets were used to calculate the isotopic compositions of these bodies. Our simulations successfully reproduced the observed nucleosynthetic Cr isotopic anomaly among Earth, Mars, and the NC meteorite parent bodies, consistent with a spatial gradient of isotopic anomalies in the inner disk. Asteroids originating from different regions in the inner disk were transported to the main belt in our simulations, resulting in the Cr isotopic anomaly variation of the NC meteorite parent bodies. However, the increment O-17 distribution among the terrestrial planets and the NC meteorite parent bodies could not be reproduced assuming a increment O-17 gradient in the inner protoplanetary disk. The spatial gradient of the nucleosynthetic isotopic anomaly may be a result of changing isotopic compositions in the infalling materials, or reflect the progressive thermal processing of presolar materials. In contrast, the absence of a increment O-17 gradient reflects that the oxygen isotopic mass-independent fractionation might have altered the spatial distribution of the nucleosynthetic increment O-17 variation in the inner protoplanetary disk before protoplanets formed.
WOS关键词TERRESTRIAL PLANET FORMATION ; NORTHWEST AFRICA 7325 ; PARENT BODIES ; BUILDING-BLOCKS ; ORIGIN ; OXYGEN ; SYSTEM ; MARS ; HETEROGENEITY ; CHROMIUM
资助项目B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; National Natural Science Foundation of China (NSFC)[42125303] ; China National Space Administration (CNSA)[D020205]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000988840200004
资助机构B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA) ; China National Space Administration (CNSA)
源URL[http://ir.iggcas.ac.cn/handle/132A11/111215]  
专题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Hui, Hejiu
作者单位1.Nanjing Univ, Sch Astron & Space Sci, 163 Xianlin Rd, Nanjing 210023, Peoples R China
2.Nanjing Univ, State Key Lab Mineral Deposits Res, 163 Xianlin Rd, Nanjing 210023, Peoples R China
3.Nanjing Univ, Lunar & Planetary Sci Inst, Sch Earth Sci & Engn, 163 Xianlin Rd, Nanjing 210023, Peoples R China
4.CAS Ctr Excellence Comparat Planetol, 96 Jinzhai Rd, Hefei 230026, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Shuai, Kang,Hui, Hejiu,Zhou, Li-Yong,et al. Spatial distribution of isotopes and compositional mixing in the inner protoplanetary disk[J]. ASTRONOMY & ASTROPHYSICS,2023,673:13.
APA Shuai, Kang,Hui, Hejiu,Zhou, Li-Yong,&Li, Weiqiang.(2023).Spatial distribution of isotopes and compositional mixing in the inner protoplanetary disk.ASTRONOMY & ASTROPHYSICS,673,13.
MLA Shuai, Kang,et al."Spatial distribution of isotopes and compositional mixing in the inner protoplanetary disk".ASTRONOMY & ASTROPHYSICS 673(2023):13.

入库方式： OAI收割

来源：地质与地球物理研究所

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