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Textural and compositional evidence for insitu crystallization of palisade bodies in coarse-grained Ca-Al-rich inclusions
Zhang, Mingming1,2; Lin, Yangting1,2; Leya, Ingo3; Tang, Guoqiang4; Liu, Yu4
2019-05-01
Source PublicationMETEORITICS & PLANETARY SCIENCE
ISSN1086-9379
Volume54Issue:5Pages:1009-1023
AbstractPalisade bodies, mineral assemblages with spinel shells, in coarse-grained Ca-, Al-rich inclusions (CAIs) have been considered either as exotic mini-CAIs captured by their host inclusions (Wark and Lovering ) or as insitu crystallization products of a bubble-rich melt (Simon and Grossman ). In order to clarify their origins, we conducted a comprehensive study of palisade bodies in an Allende Type B CAI (BBA-7), using electron backscatter diffraction (EBSD), micro-computed tomography (Micro-CT), electron probe microanalysis (EPMA), and secondary ion mass spectrometry (SIMS). New observations support the insitu crystallization mechanism: early/residual melt infiltrated into spinel-shelled bubbles and crystallized inside. Evidence includes (1) continuous crystallography of anorthite from the interior of the palisade body to the surrounding host; (2) partial consolidation of two individual palisade bodies revealed by micro-CT; (3) a palisade body was entirely enclosed in a large anorthite crystal, and the anorthite within the palisade body shows the same crystallographic orientation as the anorthite host; and (4) identical chemical and oxygen isotopic compositions of the constituent minerals between the palisade bodies and the surrounding host. Oxygen isotopic compositions of the major minerals in BBA-7 are bimodal-distributed. Spinel and fassaite are uniformly O-16-rich with O-17=-23.3 +/- 1.5 parts per thousand (2SD), and melilite and anorthite are homogeneously O-16-poor with O-17=-3.2 +/- 0.7 parts per thousand (2SD). The latter O-17 value overlaps with that of the Allende matrix (O-17-2.87 parts per thousand) (Clayton and Mayeda ), which could be explained by secondary alteration with a O-16-poor fluid in the parent body. The mobility of fluid could be facilitated by the high porosity (1.56-2.56 vol%) and connectivity (0.17-0.55 vol%) of this inclusion.
DOI10.1111/maps.13260
Funding OrganizationStrategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS KeywordOXYGEN SELF-DIFFUSION ; REFRACTORY INCLUSION ; CARBONACEOUS CHONDRITE ; MULTIPLE STAGES ; CV3 CHONDRITES ; ION MICROPROBE ; ALLENDE ; MELILITE ; ISOTOPE ; LIQUID
Language英语
Funding ProjectStrategic Priority Research Program on Space Science, Chinese Academy of Sciences[XDA15020300] ; Key Research Program of Frontier Sciences, CAS[QYZDJ-SSW-DQC001] ; Natural Science Foundation of China[41430105]
Funding OrganizationStrategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science, Chinese Academy of Sciences ; Key Research Program of Frontier Sciences, CAS ; Key Research Program of Frontier Sciences, CAS ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000468026900002
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/92112
Collection地球与行星物理院重点实验室
Corresponding AuthorLin, Yangting
Affiliation1.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.Univ Bern, Phys Inst, Space Sci & Planetol, CH-3012 Bern, Switzerland
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Mingming,Lin, Yangting,Leya, Ingo,et al. Textural and compositional evidence for insitu crystallization of palisade bodies in coarse-grained Ca-Al-rich inclusions[J]. METEORITICS & PLANETARY SCIENCE,2019,54(5):1009-1023.
APA Zhang, Mingming,Lin, Yangting,Leya, Ingo,Tang, Guoqiang,&Liu, Yu.(2019).Textural and compositional evidence for insitu crystallization of palisade bodies in coarse-grained Ca-Al-rich inclusions.METEORITICS & PLANETARY SCIENCE,54(5),1009-1023.
MLA Zhang, Mingming,et al."Textural and compositional evidence for insitu crystallization of palisade bodies in coarse-grained Ca-Al-rich inclusions".METEORITICS & PLANETARY SCIENCE 54.5(2019):1009-1023.
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