2005 Fiscal Year Final Research Report Summary
Development of high-pressure topography and application to rheology of mantle minerals
| Project/Area Number |
16340171
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | OKAYAMA UNIVERSITY |
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Principal Investigator |
KANZAKI Masami OKAYAMA UNIVERSITY, Institute for Study of the Earth's Interior, Associate Professor, 地球物質科学研究センター, 助教授 (90234153)
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| Project Period (FY) |
2004 – 2005
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| Keywords | rheology / topography / mantle mineral / synchrotron radiation / dislocation / crystal |
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| Research Abstract |
1.Development of high-pressure X-ray topography : To better understand crystal plasticity and phase transformation under pressure, we developed in-situ high-pressure X-ray topography technique using synchrotron radiation and Kawai-type multi-anvil high pressure device. Single crystal sample is placed in high pressure cell, and diffraction spots from the crystal are obseved using X-ray CCD camera, through anvil gaps. Although observable spots are limited by gude-blocks/WC anvil shadows and long sample-to-camera distance makes guiding spots to the camera very difficult, we could observe spots at high-pressure and temperature conditions.
2.Observations of topographic images of crystal : Single crystals of quartz, olivine and rutile have been studied using this technique. During initial compression to few tens tons at room temperature, broadening of spots were observed. During heating, broadened spot reverted to original. Further compression under constant temperataure caused significant broadening of the spots. Recovered samples were polycrystalline, possibly due to stress. Athough we still need further technical developments such as stress control, this technique can be very useful to obsereve crystal defects and transformation of single crystals under pressure and temperature.
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Research Products
(12 results)
