秘鲁Haquira斑岩铜多金属矿床地质特征

    Geological characteristics of the Hakura porphyry copper polymetallic deposit in Peru

    • 摘要: 斑岩铜矿是最重要的铜矿类型,其多成带产出。南美洲安第斯成矿带是全球斑岩铜矿规模最大的成矿带,发育大量超大型斑岩铜多金属矿床,因此长期以来都是斑岩铜矿研究和开发最受关注的区域。本文以南美安第斯成矿带上秘鲁东南部Haquira斑岩铜多金属矿为例,简述基本矿床地质特征,探究其成矿过程,并探讨其对我国斑岩铜矿的成矿理论和找矿勘查方法的知识意义。Haquira斑岩铜多金属矿床岩体以中酸性侵入岩为主,钾化蚀变、绢英岩化等蚀变较为发育,矿体形态呈“筒状”产出,矿石构造以细脉-浸染状为主,是Andahuaylas-Yauri斑岩/矽卡岩铜金成矿带的典型斑岩型矿床,结合外围Cu、Mo化探较好,显示该地区可能具有发现更多斑岩铜钼矿床的巨大潜力。

       

      Abstract: Porphyry copper deposit is the most important type of copper deposit, frequently occurring in deposit clusters in specific ore belts and zones. The Andean metallogenic belt, located in the southeastern part of the Pacific Rim metallogenic domain, is the largest and most valuable porphyry Cu belt, developed a large amount of giant porphyry Cu deposits. Therefore it has been the most focused area in terms of the researching and exploration of porphyry Cu deposits for a long time. The Haquira porphyry copper-molybdenum-gold deposit in southern Peru is one of the representative examples. This article takes the Haquira porphyry copper polymetallic deposit in southeastern Peru as a study case to briefly describe its geological characteristics, explore the genesis, and further to discuss the implication to the research and exploration of porphyry deposits in China. The Haquira porphyry copper polymetallic deposit is related to intermediate-felsic rocks, which are mainly affected by potassic and sericitic alteration. The ore body is occurring in a "cylindrical" shape, in a form of fine veins disseminations. It is a typical porphyry type deposit in the Andahuaylas-Yauri porphyry/skarn copper-gold belt. Integrating with peripheral Cu and Mo geochemical anomalies, it is suggested that the region has large potential to find more porphyry copper molybdenum deposits.

       

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