取样、化验是矿床普查、勘探以及某些地质研究的十分重要的手段。然而,由于某种疏忽或意外的原因,反而会出现令人迷惑不解的局面。银白色金属混人物一九七○年,我在湘西的一个矿区工作。一天,大队化验室来了一个电话,说我们矿区的样品出了问题,经过对滚机破碎的样品中出现了银白色的金属片。矿石是下寒武统的含矿炭质板岩,银白色金属显然是外来的混入物。在当时的政治背景下样品中混入了金属片,自然成了一桩严重的事件。但问题究竟出在哪里呢? 原来,这批采自坑道的样品比 Sampling, testing is a very important tool for prospecting, exploration and some geological research. However, due to some kind of negligence or unexpected reasons, there are puzzling situations. Silvery white metal mixture In 1970, I worked in a mining area in western Hunan. One day, a call came from the brigade’s laboratory to say that there was a problem with the sample in our mining area. A silvery white piece of metal appeared in the sample crushed by the roller mill. Ore is the Lower Cambrian carbonaceous slate, silver-white metal is clearly a foreign mixture. In the political context of the sample mixed with metal sheet, naturally became a serious incident. But what exactly is the problem? It turned out that the samples taken from the tunnel than the ratio