云南省中甸红牛铜矿床地质地球化学特征

摘要

云南中甸红牛铜矿床位于三叠纪义敦岛弧南端的中甸弧,是云南三江地区新探明的铜矿床之一,目前探明铜金属资源量已达中型以上规模.本文通过详细的矿体特征、蚀变分带、矿化分带以及元素地球化学特征等方面的研究,认为红牛矿床围岩蚀变及矿化分带在垂向和水平方向都具有典型的矽卡岩型矿床特征,矽卡岩元素地球化学特征明显受大理岩、石英二长斑岩化学组成的影响,矿床为典型的矽卡岩型矿床,推断深部的斑岩体可能有巨大成矿潜力.%The Hongniu deposit is located in the Zhongdian island arc belt of northwest Yunnan and lies in the middle part of southwest Sanjiang region, belonging to the southern segment of the Triassic Yidun island arc belt. This ore deposit is one of the promising copper-polymetallic deposits with vast potential, and its Cu reserves have reached the middle size. Geological features of the ore bodies and element geochemical characteristics indicate that Hongniu is a typical skarn-hornfels type copper polymetallic ore deposit. It has typical alteration zoning and metallogenic element zoning of the skarn type deposit in both vertical and horizontal directions. The?element geochemical characteristics of the skarn are obviously affected by the elements of marble and quartz monzonite porphyry. According to geological features of the ore bodies, the authors also infer that the deep porphyry bodies have great metallogenic potential.