笔者前几年,因受矿业机关的委託,常去湘南赣南调查钨锡矿。钨锡矿业机关,为了便於设计和开采·总希望在含矿率,含矿量和含矿深度这些问题上,给一个比较可靠的解答。实在,火成的金属矿床,若没有多方探矿工作,互相印证,而仅以地质 A few years ago, due to the commission by the mining authorities, I went to South Hunan to investigate tungsten and tin mines. Tungsten and tin mining authorities, in order to facilitate the design and mining, always hope that the ore content, ore content and depth of these issues, to give a more reliable answer. In fact, the volcanic metal deposits, without multi-prospecting work, confirmed each other, but only to geological