摘要
在应变分析基础上,用本文提出的方法估算了岩石体耗,初步探讨了应变、体耗与矿脉的成因联系。认为矿脉主要是矿源层岩石在变形过程中,由压溶、压实作用产生体耗而排出的热液所形成的。
Veins are all ascribed to the products of magmatic solution, metam-orphic solution or ground water solution. However, it is difficult to ascribe the gold-bearing quartz veins to the above solutins in the mine field QI-2 in Tuali. Therefore, this paper inquires preliminarily into the genesis of the veins from the point of view of tectonic strain.The authors first measure the three-demen-sional finite strain by using the Fry method and the Rf/φ technique and taking the sand grain and pebble as the strain markers. The map of the vein distribution with the contour of the strain extensity clearly shows that the veins mostly occur in the places of the high strain.Their analyses indicate that there is the close spatial and time relation between the strain extensity and the veins. In addition, this paper approaches the volume loss of rocks and puts forward a method for extimating the volume loss of the deformational rocks under the non-plane strain by using the clastic grains.So, the volume loss of the measured rocks in the field is estimated in this way.It is found that the volume loss is the link between the strain and the veins and that the mineralizing solution is mainly originated in the solution secreted by the volume loss of rocks as the result of the pressure solution and compaction durinr the deformation of the ore bed rocks.The veins are the products of the dynamothermal solution.They mostly occur in the places of the high strain and the more volume loss.The reason why the veins were not developed in the low strain places is still set forth in this paper.
关键词
金矿
岩石
矿脉
应变
体耗
strain, volume loss, vein, pressure solution, compaction
