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新寮岽铜多金属矿床是近年来粤东地区新发现的铜多金属矿床之一,矿区位于东南沿海锡、钨、铜等重要矿产发育地区,成矿地质条件非常好。本文通过对矿体中黄铜矿的铜同位素研究表明,其δ~(65)Cu值(-0.34‰~+1.37‰)与斑岩型矿床的δ~(65)Cu值基本一致,成矿物质Cu主要来源于深部岩浆,成矿流体显示为中高温(250~420℃)岩浆热液特征,Cu的分馏与岩浆热液活动关系密切,矿体的形成与成矿流体出溶有关。铜同位素组成随深度增加有增高趋势,能形成规模矿体。同时,铜同位素可以直接指示热源的位置,在热液流体石英脉出现的区域,铜矿体δ~(65)Cu值都低于0,在热液接触带、特殊的赋矿围岩和构造作用部位铜同位素值较高,预示着主矿体的边缘或前锋,是最为明显的找矿标志。
The Xinliao copper polymetallic deposit is one of the newly discovered copper polymetallic deposits in eastern Guangdong in recent years. The mining area is located in important mineral development areas such as tin, tungsten and copper along the southeastern coast, and the metallogenic geological conditions are very good. In this paper, the copper isotope studies of chalcopyrite in the ore body show that the δ ~ (65) Cu value (-0.34 ‰ ~ + 1.37 ‰) is basically consistent with the δ ~ (65) Cu value of porphyry deposits, The material Cu mainly comes from the deep magma. The ore-forming fluid is characterized by magmatic hydrothermal fluids at high and medium temperature (250-420 ℃). The fractionation of Cu is closely related to the magmatic hydrothermal activity. The orebody formation is related to the dissolution of ore-forming fluids. The composition of copper isotope increases with increasing depth and can form a scale ore body. At the same time, the copper isotope can directly indicate the location of the heat source. In the areas where the quartz veins of hydrothermal fluids appear, the δ ~ (65) Cu values of the copper ore bodies are all lower than 0, and in the hydrothermal contact zone, special ore-hosting rocks and structures The copper isotope value of the site of action is higher, indicating the edge or striker of the main ore body, which is the most obvious prospecting indicator.