权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

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)研制了小型活塞式气缸系统的地壳流体状态方程实验装置，并对其性能进行了测试。适用于气体式高温高压三轴仪的压力容器。将二氧化碳从压力容器注入微型活塞缸系统，在该系统中限制了氯化钠溶液，并连续测量P、V和T。P和V测量的精度是足够的，但T的测量还有待改进。2)我们使用与三轴仪配套的高采集率数据记录系统进行了粘滑实验。3)我们对原有的固体压力式三轴仪进行了检修，更新了T、P测量系统，使我们能够在P和T条件下进行莫霍面深度的形变实验。…此外，我们还成功地精确地测量了差应力。4)在统计热力学理论的基础上，分析了控制固体中液体和熔体分布规律的固液体系的二面角与温度、压力和组成的关系。计算结果与金属的实验数据相吻合，至少定性地解释了下地壳条件下石英+H2O体系的润湿行为。5)利用闪存算法，编制了H2O+NaC l+CO2体系相平衡的计算机程序。此外，我们通过对由状态方程得到的温度的状态函数进行微分来计算热焓。6)测量了玻璃微珠浸泡在电解液中的电阻抗，以了解其与玻璃微珠内部结构的关系。这些实验表明，电导率是由液体的连接性决定的，而介电常数是由孤立的液体贴片决定的。这些结果使我们能够建立岩石中液态分布形态的真实模型。较少