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

文献类型：期刊论文

作者Kim, Daeyeong1; Park, Munjae4; Park, Yongcheol1; Qi, Chao3; Kim, Hwayoung1; Lee, Mi Jung1; Michibayashi, Katsuyoshi2
刊名JOURNAL OF STRUCTURAL GEOLOGY
出版日期2021-02-01
卷号143页码:14
关键词Mantle xenolith Mt. Melbourne Seismic anisotropy Olivine Crystallographic preferred orientation Electron backscatter diffraction
ISSN号0191-8141
DOI10.1016/j.jsg.2020.104237
英文摘要Microstructural 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.
WOS关键词LATTICE-PREFERRED ORIENTATION ; MARIE-BYRD-LAND ; LITHOSPHERIC MANTLE ; ROSS SEA ; DEFORMATION EXPERIMENTS ; THERMAL EVOLUTION ; SHEAR DEFORMATION ; SINGLE-CRYSTALS ; WEST ANTARCTICA ; PACIFIC MARGIN
资助项目Korea Polar Research Institute (KOPRI), Republic of Korea[PE20210]
WOS研究方向Geology
语种英语
WOS记录号WOS:000611838600001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea ; Korea Polar Research Institute (KOPRI), Republic of Korea
源URL[http://ir.iggcas.ac.cn/handle/132A11/100065]  
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
通讯作者Kim, Daeyeong
作者单位1.Korea Polar Res Inst, Div Earth Sci, Incheon, South Korea
2.Nagoya Univ, Grad Sch Environm Studies, Dept Earth & Planetary Sci, Nagoya, Aichi, Japan
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
4.Korea Univ, Dept Earth & Environm Sci, Seoul, South Korea
推荐引用方式
GB/T 7714		 Kim, Daeyeong,Park, Munjae,Park, Yongcheol,et al. Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarctica[J]. JOURNAL OF STRUCTURAL GEOLOGY,2021,143:14.
APA Kim, Daeyeong.,Park, Munjae.,Park, Yongcheol.,Qi, Chao.,Kim, Hwayoung.,...&Michibayashi, Katsuyoshi.(2021).Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarctica.JOURNAL OF STRUCTURAL GEOLOGY,143,14.
MLA Kim, Daeyeong,et al."Upper mantle seismic anisotropy beneath the Northern Transantarctic Mountains inferred from peridotite xenoliths near Mt. Melbourne, northern Victoria Land, Antarctica".JOURNAL OF STRUCTURAL GEOLOGY 143(2021):14.

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来源：地质与地球物理研究所

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