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

我们研制了一种活塞缸式高压仪器，用于测量岩石的物理性质。设备特点：1)压缩、减压操作简单：闸板上装有弹簧，只需释放油压即可自动复位。因此，只需两个油阀即可完成所有操作。2)安全性高：加压机组采用钢壁覆盖，操作人员不会被电击，万一钢瓶破裂，可防止钢瓶破碎。可在钢盖和电加热装置之间联锁。变压器也有防尘、防触电的保护。3)下端子可选：通过1.7mm-Φ孔WC活塞和压力片，可从样品中得到热电偶绝缘子或热液实验用毛细管。利用该仪器对含流体岩石的微观结构发育进行了研究，特别是在夸尔-莫尔黄铁矿-水流体体系、泥质、韦氏岩-水流体体系和部分熔融花岗岩体系中。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)传统方法在合成初期先烧结流体和岩石粉末，由于流体阻碍了晶界迁移，很难实现整个样品的结构平衡。2)在卤水-石英体系中，由于二面角小，二氧化硅溶解度高，结构平衡程度高，晶粒饰面现象明显。根据这些结果，我们得出结论，盐水的几何形状和连通性与二头角的预测有很大不同，至少在下地壳条件下，大部分含水流体被隔离在颗粒角。在灰岩-水流体体系中获得了类似的面状特征。少

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