Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods
We examined the shock effects on 12 basaltic and 4 cumulate eucrites, using the petrographic and X-ray diffraction (XRD) methods. Petrographic and XRD measurements were conducted on the same polished sections of the eucrites. On the basis the ranges of undulatory extinction angles and occurrence of...
| Published in: | Polar Science |
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| Main Authors: | , , , , |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/records/16339 |
| _version_ | 1829314322510118912 |
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| author | Kanemaru, Rei Imae, Naoya Yamaguchi, Akira Takenouchi, Atsushi Nishido, Hirotsugu |
| author_facet | Kanemaru, Rei Imae, Naoya Yamaguchi, Akira Takenouchi, Atsushi Nishido, Hirotsugu |
| author_sort | Kanemaru, Rei |
| collection | National Institute of Polar Research Repository, Japan |
| container_start_page | 100605 |
| container_title | Polar Science |
| container_volume | 26 |
| description | We examined the shock effects on 12 basaltic and 4 cumulate eucrites, using the petrographic and X-ray diffraction (XRD) methods. Petrographic and XRD measurements were conducted on the same polished sections of the eucrites. On the basis the ranges of undulatory extinction angles and occurrence of maskelynite, we defined five shock degrees: A (unshocked to very weakly shocked), B (weakly shocked), C (moderately shocked), D (moderately to highly shocked), and E (highly shocked). We performed macroscopic XRD analyses of the polished sections of the eucrites using the in-plane rotation method. The results of XRD analysis are correlated with the shock degrees obtained through the petrographic observations. The averaged full width at half maximum (FWHM) values of diffraction peaks are increase from shock degree A to E. As the FWHM value reflects the lattice spacing, the observed increase in the averaged FWHM values indicates the reduction in their crystallinities because of shock metamorphism. Therefore, the petrographic and XRD methods are both useful indicators in the evaluation of the shock degrees of eucrites. journal article |
| genre | Polar Science Polar Science |
| genre_facet | Polar Science Polar Science |
| id | ftnipr:oai:nipr.repo.nii.ac.jp:00016339 |
| institution | Open Polar |
| language | English |
| op_collection_id | ftnipr |
| op_doi | https://doi.org/10.1016/j.polar.2020.100605 |
| op_relation | 10.1016/j.polar.2020.100605 https://doi.org/10.1016/j.polar.2020.100605 Polar Science 26 100605 18739652 https://nipr.repo.nii.ac.jp/records/16339 |
| op_rights | metadata only access |
| publishDate | 2020 |
| record_format | openpolar |
| spelling | ftnipr:oai:nipr.repo.nii.ac.jp:00016339 2025-04-13T14:25:55+00:00 Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods Kanemaru, Rei Imae, Naoya Yamaguchi, Akira Takenouchi, Atsushi Nishido, Hirotsugu 2020-12 https://nipr.repo.nii.ac.jp/records/16339 eng eng 10.1016/j.polar.2020.100605 https://doi.org/10.1016/j.polar.2020.100605 Polar Science 26 100605 18739652 https://nipr.repo.nii.ac.jp/records/16339 metadata only access Shock metamorphism Eucrites X-ray diffraction 2020 ftnipr https://doi.org/10.1016/j.polar.2020.100605 2025-03-19T10:19:56Z We examined the shock effects on 12 basaltic and 4 cumulate eucrites, using the petrographic and X-ray diffraction (XRD) methods. Petrographic and XRD measurements were conducted on the same polished sections of the eucrites. On the basis the ranges of undulatory extinction angles and occurrence of maskelynite, we defined five shock degrees: A (unshocked to very weakly shocked), B (weakly shocked), C (moderately shocked), D (moderately to highly shocked), and E (highly shocked). We performed macroscopic XRD analyses of the polished sections of the eucrites using the in-plane rotation method. The results of XRD analysis are correlated with the shock degrees obtained through the petrographic observations. The averaged full width at half maximum (FWHM) values of diffraction peaks are increase from shock degree A to E. As the FWHM value reflects the lattice spacing, the observed increase in the averaged FWHM values indicates the reduction in their crystallinities because of shock metamorphism. Therefore, the petrographic and XRD methods are both useful indicators in the evaluation of the shock degrees of eucrites. journal article Other/Unknown Material Polar Science Polar Science National Institute of Polar Research Repository, Japan Polar Science 26 100605 |
| spellingShingle | Shock metamorphism Eucrites X-ray diffraction Kanemaru, Rei Imae, Naoya Yamaguchi, Akira Takenouchi, Atsushi Nishido, Hirotsugu Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title | Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title_full | Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title_fullStr | Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title_full_unstemmed | Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title_short | Estimation of shock degrees of eucrites using X-ray diffraction and petrographic methods |
| title_sort | estimation of shock degrees of eucrites using x-ray diffraction and petrographic methods |
| topic | Shock metamorphism Eucrites X-ray diffraction |
| topic_facet | Shock metamorphism Eucrites X-ray diffraction |
| url | https://nipr.repo.nii.ac.jp/records/16339 |