2017 Fiscal Year Final Research Report
A study of electirical properties and natural remanent magnetization of rhyolite
| Project/Area Number |
15K05342
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Economic geology
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
宇野 康司 岡山大学, 教育学研究科, 准教授 (10510745)
古川 邦之 愛知大学, 経営学部, 准教授 (20440620)
芳野 極 岡山大学, 惑星物質研究所, 准教授 (30423338)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 電気伝導度 / 残留磁化 / 溶融 / ガラス転移点 |
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| Outline of Final Research Achievements |
Natural volcanic rock contains various minerals and its conduction mechanism is complex. To comprehend the relationship between chemical components and electrical conductivity, we measured electrical conductivity of synthesized rhyolitic glass under high P-T conditions. Observed electrical conductivity change corresponds to glass transition (Tg) zone. As glass transition temperature is crucial to understand the upwelling mechanism of volcanic rock, we carefully observed the electrical conductivity changes of rhyolitic glass. We also observed the natural remanent magnetization direction of a thick rhyolite lava and investigated whether the rhyolite has the ability to record the expected remanent magnetization direction. Rhyolite lava showing significant deviation from the expected direction of the Earth's geomagnetic field was observed in part, while rhyolite lava samples mostly show similarity in the direction with the expected one.
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| Free Research Field |
固体地球物理
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