气候变化领域集成服务门户(CCPortal): Lattice preferred orientation of talc and implications for seismic anisotropy in subduction zones

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DOI	10.1016/j.epsl.2020.116178
	Lattice preferred orientation of talc and implications for seismic anisotropy in subduction zones
	Lee J.; Jung H.; Klemd R.; Tarling M.S.; Konopelko D.
发表日期	2020
ISSN	0012821X
卷号	537
英文摘要	Strong seismic anisotropy is generally observed in subduction zones. Lattice preferred orientation (LPO) of olivine and elastically anisotropic hydrous minerals has been considered to be an important factor causing anomalous seismic anisotropy. For the first time, we report on measured LPOs of polycrystalline talc. The study comprises subduction-related ultrahigh-pressure metamorphic schists from the Makbal Complex in Kyrgyzstan-Kazakhstan and amphibolite-facies metasomatic schists from the Valla Field Block in Unst, Scotland. The here studied talc revealed a strong alignment of (001) planes (sub)parallel to the foliation and a girdle distribution of [100] axes and (010) poles (sub)parallel to the foliation. The LPOs of polycrystalline talc produced a significant P-wave anisotropy (AVp = 72%) and a high maximum S-wave anisotropy (max AVs = 24%). The results imply that the LPO of talc influence both the strong trench-parallel azimuthal anisotropy and positive/negative radial anisotropy of P-waves, and the trench-parallel seismic anisotropy of S-waves in subduction zones. © 2020 Elsevier B.V.
关键词	lattice preferred orientation seismic anisotropy subduction zone talc
英文关键词	Seismic waves; Seismology; Shear waves; Silicate minerals; Talc; Amphibolite facies; Azimuthal anisotropy; Lattice preferred orientation; Positive/negative; Radial anisotropy; Seismic anisotropy; Subduction zones; Ultrahigh-pressure metamorphic; Anisotropy; lattice dynamics; metasomatic rock; olivine; P-wave; S-wave; schist; seismic anisotropy; subduction zone; talc; ultrahigh pressure metamorphism; Scotland; United Kingdom
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202720
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, 08826, South Korea; GeoZentrum Nordbayern, Universität Erlangen, Schlossgarten 5a, Erlangen, 91054, Germany; Geology Department, University of Otago, Dunedin, 9016, New Zealand; Department of Regional Geology, St. Petersburg State University, University Embankment, St. Petersburg, 199034, Russian Federation; Novosibirsk State University, 2 Pirogova St., Novosibirsk, 630090, Russian Federation
推荐引用方式 GB/T 7714	Lee J.,Jung H.,Klemd R.,et al. Lattice preferred orientation of talc and implications for seismic anisotropy in subduction zones[J],2020,537.
APA	Lee J.,Jung H.,Klemd R.,Tarling M.S.,&Konopelko D..(2020).Lattice preferred orientation of talc and implications for seismic anisotropy in subduction zones.Earth and Planetary Science Letters,537.
MLA	Lee J.,et al."Lattice preferred orientation of talc and implications for seismic anisotropy in subduction zones".Earth and Planetary Science Letters 537(2020).