Research for the deformation field in middle to lower crust from the viewpoints of water-rock interactions.

从水-岩相互作用角度研究中下地壳变形场。

• 批准号: 14204047
• 负责人: OTSUKI Kenshiro
• 金额: $ 36.52万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14204047/
• 关键词: Gas-type high PT tri-axial apparatus; Solid-type high PT tri-axial apparatus; Apparatus for state equation of crustal fluids; Frictional melting; State equation of crustal fluids; Dihedral angle; Electric conductivity; Dielectric constant; ガス圧高温高圧; Gas-type high PT tri-axial apparatus; Solid-type high PT tri-axial apparatus; Apparatus for state equation of crustal fluids; Frictional melting; State equation of crustal fluids; Dihedral angle; Electric conductivity; Dielectric constant; ガス圧高温高圧

1)We made experimental apparatus of a mini-piston cylinder system for state-equation of crustal fluids, and tested its capability. It is used in the pressure vessel of gas-type high T & P tri-axial apparatus. CO2 is injected out of the pressure vessel into the mini-piston cylinder system in which NaCl solution is confined, P, V and T is continuously measured. The accuracy of P and V measurements is sufficient, but the measurement of T must be improved.2)We performed stick-slip experiments using the data recording system of a high acquisition rate which was attached with the tri-axial apparatus. They elucidated that friction coefficient increased abruptly and promptly just after the melting of slip surfaces by frictional heating, and that slips were stopped temporarily or finally.3)We overhauled our old solid-pressure type tri-axial apparatus and renewed the measurement system of T and P. This enabled us to performed deformation experiments under the P and T conditions at a Moho depth. … More We succeeded also in measuring the differential stress precisely. By using this refined apparatus, we stared the deformation experiments far quartzite with an aim to investigate the effects of H2O on plastic flow and fracturing in lower crust.4)On the basis of statistical thermodynamics theory, we analyzed the temperature-, pressure-and composition-dependences of the dihedral angles of solid/liquid systems which control the distribution patterns of liquids and melts in solids. The results are consistent with the experimental data for metals, and the wetting behaviors in quartz + H2O system under the condition of the lower crust were successfully explained at least qualitatively.5)By using FLASH algorism, we made a computer code of the phase equilibrium for all of the state equations of H2O + NaCl + CO2 systems that have been proposed previously. Moreover, we calculated enthalpies by differentiating the state functions for temperature that is derived from the state equations. The accuracy of the state equations was checked based on temperature changes.6)We measured the electric impedance for sintered glass beads which was immersed in electrolyte solutions in order to understand its relation to the internal structure of the sintered glass beads. These experiments elucidated that the electric conductivity is determined by the connectivity of liquid, and that the dielectric constant is governed by the isolated liquid patches. These results enable us to establish realistic models for the distributional configuration of liquid phases in rocks. Less

1）我们制作了一个迷你活塞缸系统的实验设备，以实现地壳流体的状态平衡，并测试了其能力。它用于燃气型高T＆P三轴设备的压力容器中。将二氧化碳从压力容器中注射到迷你活塞缸系统中，其中限制了NaCl溶液，P，V和T连续测量。 P和V测量的准确性足够，但是必须提高T的测量。2）我们使用具有三轴设备附加的高采集速率的数据记录系统进行了粘性滑滑实验。他们阐明了摩擦系数在通过摩擦加热融化后突然而迅速增加，并暂时停止了滑动。 ...更多，我们还成功地衡量了差异应力。通过使用这种精致的设备，我们将变形实验巨大的石英岩出版了，目的是研究H2O对塑料流量和较低地壳中损坏的影响。4）根据统计热力学理论，我们分析了控制固体/液体系统固体液体系统的液体系统和固体分布模式的温度，压力和组成依赖性和固体分布的组成。结果与金属的实验数据是一致的，并且在低壳状态下，石英 + H2O系统中的润湿行为至少在定性上成功地解释了。此外，我们通过区分从状态方程得出的温度的状态函数来计算焓。基于温度变化检查了状态方程的准确性。6）我们测量了浸入电解质溶液中的烧结玻璃珠的电阻抗，以了解其与烧结玻璃珠的内部结构的关系。这些实验阐明了电导率取决于液体的连通性，并且字典常数受分离的液体斑​​块的控制。这些结果使我们能够为岩石中液相的分布配置建立现实的模型。较少的