2012 Fiscal Year Final Research Report
Investigations on the effects of flow on texture development of magmas
| Project/Area Number |
22740343
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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 | Shizuoka University (2012)
The University of Tokyo (2010-2011) |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Keywords | マグマ / レオロジー / 結晶作用 / 粘性率 / 斜長石 |
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| Research Abstract |
Crystallization and viscosity measurement experiments were performed for magmas at high temperature conditions to quantitatively examine the effects of suspended crystals on viscosities of magmas. Based on the experiments, the equations to describe viscosities of lavas from the Izu-Oshima and the Sakurajima volcanoes were established as functions of temperature and crystal volume fraction, and also the effects of tabular plagioclase crystals on rheological behaviors of magmas were clarified. These results made us to note the problem of using the existing viscosity equation for crystal-rich magma and the importance of time-series development of magma texture through crystallization.
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