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根据时间和空间之两概念以研究矿产,名造成矿床之地质时代,为造卵时期;矿产所分布之地区,为矿产区域。(甲)云南之造矿时期为:(一)太古代(含金石英脉);(二)震旦纪(东川式铜矿及易门式铁矿);(三)寒武纪(昆阳式磷矿);(四)石
According to the concept of time and space to study the mineral, the geological era of the deposit caused by the formation of the ovum; mineral distribution area, for the mineral area. (A) The ore-forming periods of Yunnan are: (i) Archean (auriferous quartz veins); (ii) Sinian (Dongchuan copper and Yimen iron ore); (iii) Cambrian Yang phosphate rock); (D) stone