Physical properties of deep Earth minerals and the effect of water

地球深层矿物的物理性质和水的影响

• 批准号: 15340150
• 负责人: INOUE Toru
• 金额: $ 10.5万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340150/
• 关键词: mantle mineral; elastic wave velocity; ultrasonic measurement; water partitioning; hydrous magma; high pressure hydrous phase; high pressure apparatus; water in the mantle; 焼結体; 相転移; 超音波音速測定

We have clarified the physical properties of deep Earth mantle minerals and the effect of water. Experiments were conducted by in situ X-ray measurements in addition to quench experiments.From our previous studies, it has been clarified that high pressure polymorphs of olivine, wadsleyite and ringwoodite, can contain 2-3 wt% of H_2O in their crystal structures, but the partitioning of H_2O among these minerals has not been clarified yet. In the present study, we have clarified the partitioning of H_2O to synthesize these coexisting phases, and found that mantle transition zone should be a strong water reservoir in the Earth's interior.In addition, the measurements of thermal expansion and elastic properties of hydrous wadsleyite and hydrous ringwoodite were conducted to clarify the H_2O content in the mantle. Combined these results with seismic observation, we estimated the H_2O content in the mantle. Further extensive studies have been conducted with seismologist.We also tried to observe dehydration and physical properties of high pressure hydrous phase with capsulation using relatively light metal capsule by in situ X-ray observation. We succeeded to get X-ray spectra of superhydrous phase B using AgPd capsule, and further improved capsule, which were made by a single crystal diamond sleeve and metal caps, were designed for in situ X-ray experiment. The capsule is quite successful, and the effective acquisition of X-ray spectra under high pressure has been achieved by in situ X-ray experiment. This technique has been adopted to determine hydrous melt structure and time-resolved experiment of dehydration.

我们已经阐明了深层地幔矿物质的物理特性和水的影响。除了淬火实验外，还通过原位X射线测量进行了实验。从我们先前的研究中，已经澄清说，橄榄石，沃德斯利岩和林木石的高压多晶型物可以在其晶体结构中含有H_2O的2-3 wt％，但是在这些Minerals中，H_2O的分区尚未澄清。在本研究中，我们已经澄清了H_2O的分配以合成这些共存的阶段，并发现地幔过渡区应该是地球内部的强大水库。在此外，对液压wadsleyite的热膨胀和弹性特性的测量和液压wadsley和液压ringwood的弹性是为了澄清h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o in h_2o。将这些结果与地震观测结合在一起，我们估计了地幔中的H_2O含量。我们还针对地震学家进行了进一步的广泛研究。我们还试图通过原位X射线观察来观察使用相对较轻的金属囊，并使用相对较轻的金属囊来观察高压液压相的脱水和物理性质。我们成功地使用AGPD胶囊获得了超液相B的X射线光谱，并为原位X射线实验设计了由单晶钻石套和金属帽制成的进一步改进的胶囊。胶囊非常成功，并且通过原位X射线实验实现了高压下X射线光谱的有效采集。该技术已被采用以确定脱水的含水结构和时间分辨的实验。

项目成果

T.Irifune, A.Kurio, S.Sakamoto, T.Inoue, H.Sumiya, K.Funakoshi: "Formation of pure polycrystalline diamond by direct conversion of graphite at high pressure and high temperature"Physics of Earth and Planetary Interiors. in press.

T.Irifune、A.Kurio、S.Sakamoto、T.Inoue、H.Sumiya、K.Funakoshi：“通过在高压和高温下直接转化石墨来形成纯多晶金刚石”地球和行星内部物理学。

Precise determination of phase relations in pyrolite across the 660 km seismic discontinuity by in situ X-ray diffraction and quench experiments

• DOI: 10.1016/j.pepi.2003.08.010
• 发表时间: 2004-06-15
• 期刊: PHYSICS OF THE EARTH AND PLANETARY INTERIORS
• 影响因子: 2.3
• 作者: Nishiyama, N;Irifune, T;Funakoshi, K
• 通讯作者: Funakoshi, K

Grain growth of ringwoodite and its implication for rheology of the subducting slab

尖角橄榄石的晶粒生长及其对俯冲板片流变学的意义

• 发表时间: 2005
• 期刊: Earth Planet.Sci.Lett. 236
• 作者: Yamada;K.;Inagaki;N.;D.Tamazaki
• 通讯作者: D.Tamazaki

High-pressure and high-temperature stability and equation of state of superhydrous phase B

超水B相的高压高温稳定性及状态方程

• 发表时间: 2006
• 期刊: Geophysical Monograph Series 168
• 作者: T.Inoue;T.Ueda;Y.Higo;A.Yamada;T.Irifune;R.C.Liebermann
• 通讯作者: R.C.Liebermann

T.Irifune, A.Kurio, S.Sakamoto, T.Inoue, H.Sumiya: "Ultrahard polycrystalline diamond from graphite"Nature. 421. 599-600 (2003)

T.Irifune、A.Kurio、S.Sakamoto、T.Inoue、H.Sumiya：“来自石墨的超硬多晶金刚石”自然。