First principles investigation of the elasticity of serpentine minerals

• Project/Area Number: 24740357
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Ehime University
• Principal Investigator: TSUCHIYA Jun 愛媛大学, 地球深部ダイナミクス研究センター, 准教授 (00527608)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 高圧鉱物物性 / 含水鉱物 / 地球深部 / 沈み込み帯 / 弾性 / 異方性 / 第一原理電子状態計算

Research Abstract

Serpenine minerals play important role for the transportation of water into Earth's deep interiors. In this study, the structure and elasticity of lizardite and antigorite (modulation m = 16 and 17) have been determined by first principles calculation up to about 12 GPa. We found that the polarization direction is drastically changed by tilting the foliation plane of antigorite and the trench normal polarization anisotropy increases with pressure. As the result, trench normal polarization anisotropy about 0.2 s observed in the back-arc region can also be explained by the preferably oriented serpentinized fault about 10-20 km thick. The present study also suggests that serpentine transports water more than 100 km depth into the deep earth's interior.

Research Products

• [Journal Article] Stability of hydrous silicate at high pressures and water transport to the deep lower mantle (2014)
  • Author(s): Nishi, M., Irifune, T., Tsuchiya, J., Tange, Y., Nishihara, Y., Fujino, K. and Higo, Y
  • Journal Title: Nature Geoscience Volume: 7 Issue: 3 Pages: 224-227
  • DOI: 10.1038/ngeo2074
  • Peer Reviewed
• [Journal Article] A first-principles calculation of the elastic and vibrational anomalies of lizardite under pressure (2013)
  • Author(s): Jun Tsuchiya
  • Journal Title: American Mineralogist Volume: 98 Issue: 11-12 Pages: 2046-2052
  • DOI: 10.2138/am.2013.4369
  • Peer Reviewed
• [Journal Article] First principles prediction of a new high-pressure phase of dense hydrous magnesium silicates in the lower mantle (2013)
  • Author(s): Jun Tsuchiya
  • Journal Title: Geophysical Research Letters Volume: 40 Issue: 17 Pages: 4570-4573
  • DOI: 10.1002/grl.50875
  • Peer Reviewed
• [Presentation] First principles investigation of the structure, elasticity, and vibrational property of the serpentine minerals (2013)
  • Author(s): Jun Tsuchiya and Taku Tsuchiya
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2013-12-11
  • Invited
• [Presentation] First principles prediction of a new high pressure phase of dense hydrous magnesium silicates in the lower mantle (2013)
  • Author(s): Jun Tsuchiya
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2013-12-10
• [Presentation] First principles investigations of hydrous phases under pressure : Implications for the transportation of water into the earth's deep interior (2013)
  • Author(s): Jun Tsuchiya
  • Organizer: AOGS 2013
  • Place of Presentation: Brisbane, Australia
  • Year and Date: 2013-06-24
  • Invited
• [Presentation] 第一原理計算による新しい高圧含水ケイ酸塩相の予測 (2013)
  • Author(s): 土屋旬
  • Organizer: 日本地球惑星連合大会
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2013-05-19
• [Presentation] First principles investigations of hydrous phases under pressure : Implications for the transportation of water into the Earth's deep interior (2013)
  • Author(s): 土屋旬
  • Organizer: The 3rd Grobal-COE international symposium on Deep Earth Mineralogy
  • Place of Presentation: 愛媛大学
  • Year and Date: 2013-03-05
• [Presentation] First principles investigations of hydrous phases under pressure: Implications for the transportation of water into the Earth's deep interior (2013)
  • Author(s): 土屋 旬
  • Organizer: The 3rd Grobal-COE international symposium on Deep Earth Mineralogy
  • Place of Presentation: 愛媛大学（愛媛）
• [Presentation] 第一原理電子状態計算法によるリザーダイトの弾性異常 (2012)
  • Author(s): 土屋旬, 土屋卓久
  • Organizer: 日本鉱物科学会2012年年会
  • Place of Presentation: 京都
  • Year and Date: 2012-09-21
• [Presentation] 高圧下における蛇紋岩鉱物の偏向異方性 (2012)
  • Author(s): 土屋旬, 土屋卓久
  • Organizer: 日本鉱物科学会2012年年会
  • Place of Presentation: 京都
  • Year and Date: 2012-09-21
• [Presentation] First-principles investigation on the structure and elasticity of serpentine (2012)
  • Author(s): Jun Tsuchiya and Taku Tsuchiya
  • Organizer: AOGS-WPGM 2012
  • Place of Presentation: Singapore
  • Year and Date: 2012-08-16
• [Presentation] 第一原理電子状態計算法によるリザーダイトの弾性異常 (2012)
  • Author(s): 土屋 旬, 土屋卓久
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 京都大学（京都）
• [Presentation] 高圧下における蛇紋岩鉱物の偏向異方性 (2012)
  • Author(s): 土屋 旬, 土屋卓久
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 京都大学（京都）
• [Presentation] First-principles investigation on the structure and elasticity of serpentine (2012)
  • Author(s): 土屋 旬, 土屋卓久
  • Organizer: AOGS-WPGM 2012
  • Place of Presentation: シンガポール
• [Presentation] First principles investigation of the structure, elasticity, and vibrational property of the serpentine minerals
  • Author(s): Jun Tsuchiya, Taku Tsuchiya
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
  • Invited
• [Presentation] First principles investigations of hydrous phases under pressure: Implications for the transportation of water into the earth's deep interior
  • Author(s): Jun Tsuchiya
  • Organizer: AOGS 2013
  • Place of Presentation: Brisbane, Australia
  • Invited
• [Remarks]
  • URL: http://earth.sci.ehime-u.ac.jp/~junt/
• [Remarks] Jun Tsuchiya website
  • URL: http://earth.sci.ehime-u.ac.jp/~junt/index.html