Chemical and Structural Evidence for Melt-Induced Amorphization of Alkali Feldspar in Lunar Meteorite DEW 12007: Insight into Shock Amorphization Mechanisms.
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| Title: | Chemical and Structural Evidence for Melt-Induced Amorphization of Alkali Feldspar in Lunar Meteorite DEW 12007: Insight into Shock Amorphization Mechanisms. |
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| Authors: | Kim, Hyeong-Gyu1 (AUTHOR), Park, Changkun2,3 (AUTHOR), Kim, Eun Jeong4 (AUTHOR), Park, Sun Young5 (AUTHOR), Kim, Hwayoung2 (AUTHOR), Kim, Hyun Na1,4 (AUTHOR) |
| Source: | Journal of Petrology. Sep2025, Vol. 66 Issue 9, p1-9. 9p. |
| Subjects: | Amorphization, Feldspar, Impact (Mechanics), Moon, Lunar surface, Metamorphism (Geology), Planetary science, Molecular structure, Raman spectroscopy |
| Abstract: | Feldspar minerals, including alkali feldspar and plagioclase, commonly undergo shock-induced amorphization, making them key indicators for reconstructing the impact history and thermal evolution of planetary materials. This study focuses on alkali feldspar in the lunar meteorite DEW 12007 to elucidate the mechanisms of amorphization using Raman spectroscopy and electron probe microanalysis. Our findings reveal a strong correlation between crystallinity and chemical composition, with Na enrichment and K depletion observed in amorphous regions compared to the crystalline counterparts. These compositional shifts can be explained by the chemical behavior of sanidine–albite system, supporting impact melt-induced partial amorphization as the dominant mechanism. The crystalline counterparts near amorphous boundaries exhibit increased K content, reflecting the compositional redistribution during partial melting and quenching. To assess the utility of these findings, feldspar from the well-documented L6 ordinary chondrites were analyzed. Feldspars from the ordinary chondrites showed opposite trends, exhibiting the amorphous phases enriched in K and depleted in Na relative to the crystalline counterparts. These differences are consistent with the chemical behavior of sanidine–albite system. This ability has a potential to differentiate whether maskelynite was formed via solid-state transformation or melt-quenching processes, providing critical insights into the impact history and thermal evolution of the rocky crusts of the Moon and other solar system bodies. Extending this framework to other meteorites, returned samples, and planetary bodies enhances our understanding of impact processes, offering a robust approach for unraveling the complex interplay between shock metamorphism and planetary evolution. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Petrology is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 188960823 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Chemical and Structural Evidence for Melt-Induced Amorphization of Alkali Feldspar in Lunar Meteorite DEW 12007: Insight into Shock Amorphization Mechanisms. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kim%2C+Hyeong-Gyu%22">Kim, Hyeong-Gyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Park%2C+Changkun%22">Park, Changkun</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Eun+Jeong%22">Kim, Eun Jeong</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Park%2C+Sun+Young%22">Park, Sun Young</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Hwayoung%22">Kim, Hwayoung</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Hyun+Na%22">Kim, Hyun Na</searchLink><relatesTo>1,4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Petrology%22">Journal of Petrology</searchLink>. Sep2025, Vol. 66 Issue 9, p1-9. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Amorphization%22">Amorphization</searchLink><br /><searchLink fieldCode="DE" term="%22Feldspar%22">Feldspar</searchLink><br /><searchLink fieldCode="DE" term="%22Impact+%28Mechanics%29%22">Impact (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Moon%22">Moon</searchLink><br /><searchLink fieldCode="DE" term="%22Lunar+surface%22">Lunar surface</searchLink><br /><searchLink fieldCode="DE" term="%22Metamorphism+%28Geology%29%22">Metamorphism (Geology)</searchLink><br /><searchLink fieldCode="DE" term="%22Planetary+science%22">Planetary science</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+spectroscopy%22">Raman spectroscopy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Feldspar minerals, including alkali feldspar and plagioclase, commonly undergo shock-induced amorphization, making them key indicators for reconstructing the impact history and thermal evolution of planetary materials. This study focuses on alkali feldspar in the lunar meteorite DEW 12007 to elucidate the mechanisms of amorphization using Raman spectroscopy and electron probe microanalysis. Our findings reveal a strong correlation between crystallinity and chemical composition, with Na enrichment and K depletion observed in amorphous regions compared to the crystalline counterparts. These compositional shifts can be explained by the chemical behavior of sanidine–albite system, supporting impact melt-induced partial amorphization as the dominant mechanism. The crystalline counterparts near amorphous boundaries exhibit increased K content, reflecting the compositional redistribution during partial melting and quenching. To assess the utility of these findings, feldspar from the well-documented L6 ordinary chondrites were analyzed. Feldspars from the ordinary chondrites showed opposite trends, exhibiting the amorphous phases enriched in K and depleted in Na relative to the crystalline counterparts. These differences are consistent with the chemical behavior of sanidine–albite system. This ability has a potential to differentiate whether maskelynite was formed via solid-state transformation or melt-quenching processes, providing critical insights into the impact history and thermal evolution of the rocky crusts of the Moon and other solar system bodies. Extending this framework to other meteorites, returned samples, and planetary bodies enhances our understanding of impact processes, offering a robust approach for unraveling the complex interplay between shock metamorphism and planetary evolution. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Petrology is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1093/petrology/egaf074 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1 Subjects: – SubjectFull: Amorphization Type: general – SubjectFull: Feldspar Type: general – SubjectFull: Impact (Mechanics) Type: general – SubjectFull: Moon Type: general – SubjectFull: Lunar surface Type: general – SubjectFull: Metamorphism (Geology) Type: general – SubjectFull: Planetary science Type: general – SubjectFull: Molecular structure Type: general – SubjectFull: Raman spectroscopy Type: general Titles: – TitleFull: Chemical and Structural Evidence for Melt-Induced Amorphization of Alkali Feldspar in Lunar Meteorite DEW 12007: Insight into Shock Amorphization Mechanisms. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kim, Hyeong-Gyu – PersonEntity: Name: NameFull: Park, Changkun – PersonEntity: Name: NameFull: Kim, Eun Jeong – PersonEntity: Name: NameFull: Park, Sun Young – PersonEntity: Name: NameFull: Kim, Hwayoung – PersonEntity: Name: NameFull: Kim, Hyun Na IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00223530 Numbering: – Type: volume Value: 66 – Type: issue Value: 9 Titles: – TitleFull: Journal of Petrology Type: main |
| ResultId | 1 |
