Attack of superoritical fluid on nano-scale indented zones of rocks and minerals

超临界流体对岩石和矿物纳米级锯齿区的侵蚀

• 批准号: 13304039
• 负责人: MASUDA Toshiaki
• 金额: $ 15.56万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13304039/
• 关键词: supercritical water; sub-critical; nano-indentation tester; atomic force microscope; point-contact deformation; dissolution; quartz; silica glass; 起臨界水; 石英単結晶; 岩石・鉱物; メノウ; 圧力容器; 超臨界流体; 超音波顕微鏡; 溶脱

We confirmed that the supercritical H20 generator can generate temperature of up to 550. C and pressure of up to 40 MPa. Then, dissolution test of indented quartz single crystal was performed in the temperature and pressure range. The size of indented imprints on quartz single crystal were rapidly dissolved when the H2O was in supercrical. The similar test for silica glass shows that the glass was dissolved at much faster rate than quartz single crystal.From the above result, we tentatively propose that the level of the nuclear geological waste is better not to be deeper than 600 m. If the depth is more than the critical one and if the extraordinary heat is accidentally supplied from the waste, H2O at the neighbour of the waste may become supercritical to dissolve much amount of minerals and rocks there. We also propose that the single crystal of quartz is much better to use the confining material of the high-level nuclear waste than the silica glass, because it is more resistant against supercritical fluid.

我们确认超临界氢气发生器可以产生高达 550°C 的温度和高达 40 MPa 的压力。然后，在该温度和压力范围内进行压痕石英单晶的溶解试验。当H2O处于超临界状态时，石英单晶上的凹痕尺寸迅速溶解。对石英玻璃的类似试验表明，玻璃的溶解速度比石英单晶快得多。根据上述结果，我们初步建议核地质废物的液位深度最好不要超过600 m。如果深度超过临界深度，并且如果废物意外地提供了异常的热量，则废物附近的H2O可能会变得超临界，从而溶解那里的大量矿物质和岩石。我们还提出，石英单晶比石英玻璃更适合用作高放核废料的限制材料，因为它更能抵抗超临界流体。

项目成果

Stallard, A.R., Ikei, H., Masuda, T.: "Numerical simulations of spiral-shaped inclusion trails : can 3D geometry diostinguish between end-member models of spiral formation?"Journal of Metamorphic Geology. 20. 801-812 (2002)

Stallard, A.R.、Ikei, H.、Masuda, T.：“螺旋状包裹体轨迹的数值模拟：3D 几何能否区分螺旋形成的端元模型？”变质地质学杂志。

Masuda, T., Kimura, N., Hara, Y.: "Progress in microboudin method for palaeo-stress analysis of metamorphic tectonites : application of matematically refined expression."Tectonophysics. 364. 1-8 (2003)

Masuda, T.、Kimura, N.、Hara, Y.：“变质构造岩古应力分析的微布丁方法进展：数学精炼表达的应用。”构造物理学。

Masuda, T., Kimura, N.: "Can Newtonian viscous-matrix model be applied to the microboudinage of columnar mineral grains in metamorphic tectonites?"Journal of Structural Geology. 27(in press). (2004)

Masuda, T.，Kimura, N.：“牛顿粘性基质模型能否应用于变质构造岩中柱状矿物颗粒的微观结构？”《构造地质学杂志》。

Masuda, T., Kimura, N., Fu, B., Li, X.: "Validity of the microboudin method for palaeo-stress analysis : application to extraordinarily long sodic amphibole grains in a metachert from Aksu, China"Journal of Structural Geology. 26. 203-206 (2004)

Masuda, T.、Kimura, N.、Fu, B.、Li, X.：“古应力分析的微布丁方法的有效性：对中国阿克苏超长钠闪石颗粒的应用”结构杂志

Masuda, T., Kimura, N., Hara, Y.: "Progress in microboudin method for palaeo-stress analysis of metamorphic tectonites"Tectonophysics. 364. 1-8 (2003)

Masuda, T.、Kimura, N.、Hara, Y.：“变质构造岩古应力分析的微布丁方法进展”构造物理学。