New Crystal Preferred Orientation of Amphibole Experimentally Found in Simple Shear

doi:10.1029/2019GL085189

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DOI	10.1029/2019GL085189
	New Crystal Preferred Orientation of Amphibole Experimentally Found in Simple Shear
	Kim, Junha; Jung, Haemyeong
	2019-11-29
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
EISSN	1944-8007
出版年	2019
卷号	46 期号:22 页码:12996-13005
文章类型	Article
语种	英语
国家	South Korea
英文摘要	The crystal preferred orientation (CPO) of amphibole has a large effect on seismic anisotropy in the crust. Previous studies have reported four CPO types (I-IV) of amphibole, but the genesis of type IV CPO, which is characterized by [100] axes aligned in a girdle subnormal to the shear direction, is unknown. In this study, shear deformation experiments on amphibolite were conducted to find the genesis of type IV CPO at high pressure (0.5 GPa) and temperature (500-700 degrees C). The type IV CPO was found under high shear strain (gamma > 3.0), and the sample exhibited grains in a range of sizes but generally smaller than the grain size of samples with lower shear strain. The seismic anisotropy of type IV CPO is lower than that of types I-III. The weak seismic anisotropy of highly deformed amphibole could explain weak seismic anisotropy observed in the middle crust.
英文关键词	Crystal preferred orientation (CPO) Amphibole Seismic anisotropy Microstructure
领域	气候变化
收录类别	SCI-E
WOS记录号	WOS:000499304800001
WOS关键词	SEISMIC ANISOTROPY ; LOWER-CRUSTAL ; CATACLASTIC DEFORMATION ; STRAIN LOCALIZATION ; METAMORPHIC BELT ; UPPER-MANTLE ; V-S ; ROCKS ; HORNBLENDE ; CREEP
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/225131
专题	环境与发展全球科技态势
作者单位	Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea
推荐引用方式 GB/T 7714	Kim, Junha,Jung, Haemyeong. New Crystal Preferred Orientation of Amphibole Experimentally Found in Simple Shear[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(22):12996-13005.
APA	Kim, Junha,&Jung, Haemyeong.(2019).New Crystal Preferred Orientation of Amphibole Experimentally Found in Simple Shear.GEOPHYSICAL RESEARCH LETTERS,46(22),12996-13005.
MLA	Kim, Junha,et al."New Crystal Preferred Orientation of Amphibole Experimentally Found in Simple Shear".GEOPHYSICAL RESEARCH LETTERS 46.22(2019):12996-13005.