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2017 Fiscal Year Final Research Report

Superplasticity of minerals 2

Research Project

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Project/Area Number 26247087
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Economic geology
Research InstitutionThe University of Tokyo

Principal Investigator

Hiraga Takehiko  東京大学, 地震研究所, 准教授 (10444077)

Project Period (FY) 2014-04-01 – 2018-03-31
Keywords超塑性 / マントル / 地震波速度異方性
Outline of Final Research Achievements

Grain boundary migration, grain boundary sliding, rigid-body grain rotation and grain-neighbor switching occur during diffusion creep. We show that grain boundary sliding during diffusion creep induces grains to rotate. Preferential grain boundary sliding on low-viscosity boundaries results in the development of crystallographic preferred orientation. Finally, diffusion creep (superplastic) Earth hypothesis is proposed.

Free Research Field

岩石・鉱物物理

URL: 

Published: 2019-03-29  

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