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前言研究前寒武纪金矿应该重视三种重要类型,即:1.太古代绿岩金矿;2、早元古代古砂矿;3、晚元古代～显生宙硬砂岩-沉积岩带金矿。前寒武纪岩石中浅成热液矿床和热泉型金矿一般不发育,这是一个值得注意的问题。前寒武纪岩石分布区还有不少火山成因的块状贱金属硫化矿床,本文未加考虑,但其成矿和前寒武纪金矿有一定关系,因其中有大量伴生金,如加拿大魁北克省罗安达地区的霍恩矿床(Horne)。在加拿大许多矿区中,此种贱金属矿床含金很高,且和绿岩金矿产在同一区域,原因何在,尚不清楚,本文将不于赘述。
Preface The study of the Precambrian gold deposits should focus on three important types, namely: 1. Archean Greenstone gold deposit; 2. Early Proterozoic ancient ore deposit; 3. Late Proterozoic-Phanerozoic sandstone-sedimentary rock gold deposit. Pre-Cambrian rocks are generally undeveloped epithermal deposits and hot spring type gold deposits, which is a notable problem. There are many volcanic massive polymetallic sulphide deposits in the Precambrian rock distribution. This paper does not consider this issue. However, its mineralization is related to the Precambrian gold deposit due to its large amount of associated gold such as Quebec, Canada Horne, Luanda region. Among the many mines in Canada, the base metal deposits are high in gold and are located in the same area as the Greenstone Gold Mine. The reason for this is not yet clear and will not be described in detail here.