Origin of Al-rich chondrules in CV chondrites: Incorporation of diverse refractory components into the ferromagnesian chondrule-forming region
文献类型：期刊论文
| 作者 | Zhang, Mingming1,2; Lin, Yangting1,2; Tang, Guoqiang3; Liu, Yu3; Leya, Ingo4 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 272页码:198-217 |
| 关键词 | Al-rich chondrules Ca-, Al-rich inclusions Solar nebula Oxygen isotopes Rare earth elements |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2019.12.011 |
| 英文摘要 | Aluminum-rich (Al2O3 > 10 wt%) chondrules (ARCs) are important chondritic components that petrologically link two other major chondritic components, ferromagnesian chondrules (FMCs) and calcium-aluminum-rich inclusions (CAIs), which formed in different regions of the protoplanetary disk. They are closely related to FMCs as indicated by their similar igneous textures, mineral assemblages, and Al-Mg isotope systematics; meanwhile, they have genetic a relationship with CAIs as indicated by their distinctly Al2O3-rich compositions and occasional occurrences of relict CAI minerals. In order to further understand their formation mechanism and genetic relationships to FMCs and CAIs, nine ARCs and three ARC-related objects from Allende (CV3 oxidized), Leoville (CV3 reduced), and the ungrouped Ningqiang carbonaceous chondrites were studied for petrology, mineralogy, bulk compositions, rare earth element (REE) abundances, and in situ oxygen isotopic compositions. Our results suggest that (i) ARCs crystallized from incompletely molten droplets with crystallization sequences mainly determined based on their bulk compositions. Projection of their bulk compositions onto the forsterite-saturated tridymite-diopside-spinel diagram allows us to classify them into Al-rich [Sp], Al-rich [En], and Al-rich [Plag]; (ii) ARC precursors are mixtures of refractory materials and the precursors of FMCs, in which the refractory materials have diverse sources rather than a single type of CAI/AOA (amoeboid olivine aggregate); this is inferred from the bulk compositions, relict minerals (both coarse- and fine-grained spinel, olivine, and Al-Ti-diopside), and various CAI-like REE patterns (unfractionated Group I/III and highly fractionated Group II/II-like) of ARCs. The sources include AOAs and igneous Type B/C CAIs; (iii) ARCs were melted in the FMC-forming region, possibly by the same heating mechanism or during the same transient heating event, which is consistent with the similar oxygen isotopic compositions of their phenocrysts (Delta O-17 = -5.2 +/- 1.7 parts per thousand, 2SD). Thus, we consider that ARCs formed by melting of mixtures of diverse refractory components with the FMC precursors in the FMC-forming region. (C) 2019 Elsevier Ltd. All rights reserved. |
| WOS关键词 | OXYGEN-ISOTOPE COMPOSITIONS ; NINGQIANG CARBONACEOUS CHONDRITE ; PORPHYRITIC PYROXENE CHONDRULES ; RARE-EARTH-ELEMENTS ; EARLY SOLAR-SYSTEM ; AL-26-MG-26 SYSTEMATICS ; TRACE-ELEMENT ; FEO-RICH ; CA-RICH ; CONTEMPORANEOUS FORMATION |
| 资助项目 | Strategic Priority Research Program on Space Science, CAS[XDA15020300] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC001] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000512992000012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Strategic Priority Research Program on Space Science, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95627]  |
| 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 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Lin, Yangting |
| 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, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Univ Bern, Phys Inst, Space Sci & Planetol, CH-3012 Bern, Switzerland |
| 推荐引用方式 GB/T 7714 | Zhang, Mingming,Lin, Yangting,Tang, Guoqiang,et al. Origin of Al-rich chondrules in CV chondrites: Incorporation of diverse refractory components into the ferromagnesian chondrule-forming region[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2020,272:198-217. |
| APA | Zhang, Mingming,Lin, Yangting,Tang, Guoqiang,Liu, Yu,&Leya, Ingo.(2020).Origin of Al-rich chondrules in CV chondrites: Incorporation of diverse refractory components into the ferromagnesian chondrule-forming region.GEOCHIMICA ET COSMOCHIMICA ACTA,272,198-217. |
| MLA | Zhang, Mingming,et al."Origin of Al-rich chondrules in CV chondrites: Incorporation of diverse refractory components into the ferromagnesian chondrule-forming region".GEOCHIMICA ET COSMOCHIMICA ACTA 272(2020):198-217. |
入库方式： OAI收割
来源：地质与地球物理研究所
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