气候变化领域集成服务门户(CCPortal): Diffusion Creep of Diopside

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DOI	10.1029/2020JB019855
	Diffusion Creep of Diopside
	Ghosh S.; Koizumi S.; Hiraga T.
发表日期	2021
ISSN	21699313
卷号	126 期号:1
英文摘要	We have conducted uniaxial compression experiments on fine-grained diopside with either 4 or 10 vol% forsterite and 10 vol% anorthite. We changed the average grain size in the diopside with forsterite aggregate from 0.43 to 4.07 μm to reveal the grain size sensitivity of the creep rate. Mechanical data were obtained at a stepped load for a temperature range of 1050°C–1170°C. The observed strain rates are best explained by stress and grain size exponent values of 1 and 2, respectively, and activation energy of ∼720 kJ/mol, which indicates lattice diffusion creep. Anorthite bearing aggregate is ∼3 times weaker than forsterite-bearing aggregate, probably due to the presence of aluminum. We have compared previously reported diffusion creep rates of diopside in nondimensional stress and strain-rate space, constructed based on our diffusion creep law. It demonstrates that all the earlier mechanical data are well summarized by our diffusion creep flow law. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	clinopyroxene; diopside; lattice diffusion creep; nondimensional plot; rheology and flow law; rock deformation
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187416
作者单位	Earthquake Research Institute, The University of Tokyo, Bunkyo-Ku, Tokyo, Japan; Institut des Sciences de la Terre d’Orléans (ISTO), UMR 7327, Université d’Orléans, Orléans, France
推荐引用方式 GB/T 7714	Ghosh S.,Koizumi S.,Hiraga T.. Diffusion Creep of Diopside[J],2021,126(1).
APA	Ghosh S.,Koizumi S.,&Hiraga T..(2021).Diffusion Creep of Diopside.Journal of Geophysical Research: Solid Earth,126(1).
MLA	Ghosh S.,et al."Diffusion Creep of Diopside".Journal of Geophysical Research: Solid Earth 126.1(2021).