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Development of a multi-terminal high-pressure apparatus for measurements of rock physical properties

岩石物性测量多端高压装置的研制

基本信息

批准号：
12554018
负责人：
NAKAMURA Michihiko
金额：
$ 8.83万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

We developed a piston-cylinder type high pressure apparatus for measurements of physical properties of rocks. The features of the apparatus include 1) Simple operation of compression & decompression : The rams have springs that enable self-return only by releasing oil pressure. As a result, all the operation is possible with only two oil valves. 2) Great safety : The pressurized units are covered with steel wall so that the operators will not get a electric shock and, in case of cylinder rapture, they will protected from broken pieces. Interlock between steed cover and electrical heating units is available. The eledrica1 transformer is also covered against dust electrical shock. 3) Lower terminal available : Through 1.7mm-Φ holed WC piston and pressure piece, it is possible to get a thermocouple insulator or a capillary tube for hydrothermal experiments from the sample.Using this apparatus, we have investigated microstructure development of fluid-bearing rocks, particularly in the quar … More tzite-aqueous fluid system, dunite, wehrlite-aqueous fluid system, and partially molten granititic system. We investigated a three-dimensional geometry of aqueous fluid in the synthesized quartzite at lower crustal conditions using an ultra high-resolution X-ray CT and obtained the following result ; 1) By the traditional method wherein fluid and rock powders are sintered form the beginning of the synthesis, textural equilibration of whole the sample is very difficult to achieve because fluid hinders the grain boundary migration. 2)In the brine-quartz system, where degree of textural equilibration is expected to be high due to small dihedral angle and high silica solubility, grain faceting is conspicuous. Based on these results, we concluded that geometry and connectivity of brine are pretty much different from those expected form the dihedr al angle, and that most of the aqueous fluid is isolated at grain corners at least in the lower crustal conditions. We obtained the similar faceting feature in dunite-aqueous fluid system. Less

我们研制了一种用于岩石物理性质测量的活塞缸式高压装置。该装置的特点包括：1）压缩和减压操作简单：柱塞有弹簧，只需释放油压即可自动返回。因此，所有的操作都可以只用两个油阀。2)大安全：加压装置用钢壁覆盖，使操作人员不会受到电击，并且在钢瓶破裂的情况下，他们将免受碎片的伤害。可与电加热装置联锁。eledrica 1 Transformer也有防尘电击保护。3)可使用的下部端子：通过1.7mm-Φ孔WC活塞和压块，可以从样品中获得热电偶绝缘体或热液实验用毛细管，利用该装置研究了含流体岩石的显微结构演化，特别是石英砂岩的显微结构演化 ...更多信息水热流体系统、纯橄榄岩系统、硅铝岩系统和部分熔融的花岗岩系统。我们利用超高分辨率X射线CT研究了下地壳条件下合成石英岩中含水流体的三维几何结构，得到以下结果：1）传统的方法是从合成开始就将流体和岩石粉末烧结，由于流体阻碍了晶界的迁移，很难实现整个样品的结构平衡。2）在卤水-石英体系中，由于小的二面角和高的二氧化硅溶解度，结构平衡程度被认为是高的，颗粒刻面是显著的。基于这些结果，我们得出的结论是，几何形状和连通性的盐水是非常不同的预期形式的二面角，和大部分的含水流体是孤立的颗粒角落，至少在下地壳条件。在纯橄榄岩-水相流体体系中也得到了类似的刻面特征。少