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。

基本信息

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

项目摘要

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）我们将固定的气体型容器进行了实验，将二氧化碳的二氧化碳注入了小动物，将NaCl溶液限制为p，v和coninules coninuely测量。 3）我们在p和t tonditions下，在Moho深度上，我们在P和T张力下进行了过度的压力三轴设备这种精制的设备阐明了H2O对塑料流量和下层地壳中的破裂的影响。4）根据统计热力学理论，我们分析了控制分布模式的固体/液体系统二面角的温度，压力和依赖性固体中的缝制和熔体的结果与金属的实验数据一致，并且在下壳下的石英 + H2O系统中的润湿行为至少质量地浮出水面。5）此外，对于H2O + NaCl + CO2系统的所有状态方程，我们通过根据烧结的玻璃珠珠子的电力来理解其使用的锥度来计算焓的焓。烧结的玻璃珠。