2009 Fiscal Year Final Research Report
Electrical conductivity measurements of hydrous mineral and hydrous rock
| Project/Area Number |
19540507
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Osaka University |
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Principal Investigator |
FUJITA Kiyoshi Osaka University, 工学研究科, 講師 (00283862)
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| Co-Investigator(Kenkyū-buntansha) |
SEKI Masayuki 神戸常盤大学, 保健学部, 講師 (50280087)
OTOFUJI Yoichiro 神戸大学, 理学研究科, 教授 (90160895)
KATSURA Tomoo 岡山大学, 地球物質科学研究センター, 教授 (40260666)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 地殻 / マントル / 核 |
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| Research Abstract |
A study of electrical conductivity measurements of metamorphic rocks as a function of temperature highlight the importance of conductivity variations associated with dehydration. We observed conductivity changes for anhydrous rocks and hydrous amphibolites. Our experimental results reveal that dehydration takes place and there is a non-linear variation above metamorphic temperatures. To evaluate the observed change in conductivity after dehydration, a numerical calculation was attempted. The calculation results showed the bulk conductivity of rock plus pure water cannot account for conductivity values of reacted rocks if the crust dehydrates. Alternatively, data of 0.1 molal NaCl solutions are consistent with those of amphibolites. Furthermore, we have tried to construct electrical conductivity model of hydrous rock.
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Research Products
(12 results)
