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Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarctica

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dc.contributor.authorKim, Daeyeong-
dc.contributor.authorPark, Munjae-
dc.contributor.authorPark, Yongcheol-
dc.contributor.authorQi, Chao-
dc.contributor.authorKim, Hwayoung-
dc.contributor.authorLee, Mi Jung-
dc.contributor.authorMichibayashi, Katsuyoshi-
dc.date.accessioned2021-04-30T01:26:56Z-
dc.date.available2021-04-30T01:26:56Z-
dc.date.issued2021-02-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/11786-
dc.description.abstractMicrostructural investigations of mantle xenoliths from the Mt. Melbourne area were undertaken to reveal the origin of S-wave splitting beneath northern Victoria Land, Antarctica. The six analyzed peridotites contain various deformation features. The rotated olivine maxima of [100] and [010] into horizontal and vertical orientations, respectively, are classified into five samples with a D-type crystallographic preferred orientation (CPO) and one sample as an A-type CPO. The D-type olivine fabric can be explained by multiple slip systems of {0kl}[100] at low-temperature and high-stress conditions; therefore, both compressional and extensional regimes during subduction and rifting, respectively, could be applied in this study. With an assumption that olivine a-axes are aligned along the direction of mantle flow to form maximum S-wave splitting, the observed delay time of 0.9?1.3 s beneath northern Victoria Land can be partially explained by the anisotropy in the mantle peridotites. The remaining seismic anisotropy can be explained by the presence of melt pockets trapped along tectonic faults that developed perpendicular to the fast S-wave splitting direction. This study therefore demonstrates that the NE?SW-trending S-wave splitting beneath northern Victoria Land, Antarctica, results from the existence of both mantle peridotites as well as melt pockets trapped along the tectonic faults.en_US
dc.languageEnglishen_US
dc.language.isoen_USen_US
dc.subjectGeologyen_US
dc.subject.classificationJang Bogo Stationen_US
dc.titleUpper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarcticaen_US
dc.title.alternative남극 북빅토리아랜드 멜버른화산 주변의 맨틀포획암으로터 산출된 남극종단산맥 아래 맨틀의 지진파비등방성en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Daeyeong, et al. 2021. "Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarctica". <em>JOURNAL OF STRUCTURAL GEOLOGY</em>, 143(1): 104237-104237.en_US
dc.citation.titleJOURNAL OF STRUCTURAL GEOLOGYen_US
dc.citation.volume143en_US
dc.citation.number1en_US
dc.identifier.doi10.1016/j.jsg.2020.104237-
dc.citation.startPage104237en_US
dc.citation.endPage104237en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2019:32.5en_US
dc.subject.keywordMantle xenolithen_US
dc.subject.keywordMt. Melbourneen_US
dc.subject.keywordSeismic anisotropyen_US
dc.subject.keywordOlivineen_US
dc.subject.keywordCrystallographic preferred orientationen_US
dc.subject.keywordElectron backscatter diffractionen_US
dc.identifier.localId2021-0001-
dc.identifier.scopusid2-s2.0-85098175918-
dc.identifier.wosid000611838600001-
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2020-2020, Characterization and origin of the Zealandia-Antarctic mantle (20-20) / Park, Sung Hyun (PE20210)
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