2009 Fiscal Year Final Research Report
Study on viscosity contrast between majorite and ringwoodite
| Project/Area Number |
20740307
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
NISHIHARA Tu Tokyo Institute of Technology, 上級研究員センター, 上級研究員 (10397036)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 鉱物物理 |
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| Research Abstract |
In order to study viscous behavior of the deep Earth materials, experimental techniques on deformation experiment and stress measurement under high-temperature and high-pressure were developed. An experimental study using the developed technique revealed that the activation volume of the low-temperature rheology of olivine has positive value, and this suggests that viscous resistance by subducting slab increases with increasing depth. On the other hand, a preliminary study on mechanism of the decompression-decomposition reaction of majorite showed that the reaction starts with formation of garnet and clinopyroxene with disequilibrium compositions followed by chemical diffusion in garnet.
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Research Products
(17 results)
