A study of electirical properties of rock associated with dehydrationn and melt

• Project/Area Number: 24540512
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Osaka University (2013-2014); Saga University (2012)
• Principal Investigator: FUJITA Kiyoshi 大阪大学, 工学(系)研究科(研究院), 教授 (00283862)
• Co-Investigator(Kenkyū-buntansha): YOSHINO Takashi 岡山大学, 地球物質科学研究センター, 准教授 (30423338) ; WADA Yutaka 奈良教育大学, 教育学部, 教授 (00252825) ; ICHIKI Masahiro 東北大学, 理学研究科, 助教 (80359182)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 電気伝導度 / 脱水 / 溶融 / 火山岩 / 含水岩石

Outline of Final Research Achievements

The purpose of our study is to provide an explanation for experimental results on electrical conductivity variations for rhyolite melt. To detect melt processes using electrical conductivity, we carried out conductivity measurements on synthesized rhyolite. We also developed a cell-type lattice model to clarify the inter-connected conductivity mechanism of rock melt. We quantified electrical conduction networks in rock and evaluated electrical conductivity models of melt.

Research Products

• [Journal Article] A 3-D conductivity model of the Australian continent using observatory and magnetometer array data (2014)
  • Author(s): Liejun Wang, Adrian P. Hitchman, Yasuo Ogawa, Weerachai Siripunvaraporn, Masahiro Ichiki and Kiyoshi Fuji-ta
  • Journal Title: Geophysical Journal International Volume: 198 Issue: 2 Pages: 1143-1158
  • DOI: 10.1093/gji/ggu188
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Prediction of physical properties of water under extremely suercritical conditions: A molecular dynamics study (2013)
  • Author(s): Hiroshi Sakuma, Masahiro Ichiki, Katsuyuki Kawamura and Kiyoshi Fujita
  • Journal Title: Journal of Chemical Physics Volume: 138 Issue: 13 Pages: 134506-134506
  • DOI: 10.1063/1.4798222
  • Peer Reviewed
• [Journal Article] Prediction of physical properties of water under extremely supercritical conditions: A molecular dynamics study (2013)
  • Author(s): Hiroshi Sakuma, M. Ichiki, K. Kawamura, and K. Fuji-ta
  • Journal Title: The Journal of Chemical Physics Volume: 138
  • Peer Reviewed
• [Journal Article] 火山体環境下での流紋岩の電気伝導度変化 (2013)
  • Author(s): 藤田清士・山下茂・芳野極・下宿彰・和田穣隆
  • Journal Title: Conductivity Anomaly 研究会論文集 2013 Volume: 2013
• [Presentation] Electrical conductivity measurement of rhyolite melt (2014)
  • Author(s): Fuji-ta, K., Yamashita, S., Yoshino, T., Shimojuku, A. and Wada, Y.
  • Organizer: 22nd EM Induction Workshop
  • Place of Presentation: Weimar, Germany
  • Year and Date: 2014-08-24 – 2014-08-30
• [Presentation] VARIATION IN ELECTRICAL CONDUCTIVITY OF RHYOLITIC MELT (2014)
  • Author(s): K. Fuji-ta, S. Yamashita, T. Yoshino, M. Seki, M. Ichiki, A. Shimojyuku and Y. Wada
  • Organizer: Geofluid3: Nature and Dynamics of Fluids in Subduction Zones
  • Place of Presentation: 東京工業大学
  • Invited
• [Presentation] Electrical Conductivity Network Model for the Hydrous Rock and Mineral (2012)
  • Author(s): K. Fuji-ta, M. Seki, T. Katsura, and M. Ichiki
  • Organizer: 21st EM Induction Workshop
  • Place of Presentation: Darwin