民乐火山岩-次火山岩型铜矿

民乐铜矿产于中三叠统钙碱性、碱性系列火山碎屑岩、熔岩、次火山岩(英安斑岩)中。矿床形成与陆相火山活动及其后的火山热液、英安斑岩体侵入有关,明显受火山岩岩性、岩相、层位及构造控制。成因上与火山喷发、英安斑岩体侵入作用有关,具有斑岩铜矿的一些特征。矿床受后期火山热液,次生富集叠加改造明显。

MINLE VOLCANIC - SUBVOLCANIC COPPER DEPOSIT

The Minle Cu deposit is distributed in the middle Triassic calc-alkalic, alkalic volcaniclastic rock, lava and subvolcanic rock(dacite porphyry). The formation of ore deposit is related to the land facies volcanic activity and the later volcanic thermal fluid and dacite intrusion, which is clearly controlled by the lithological character of volcanic rock, lithofacies, horizon and structure. Its genesis is related to volcanic eruption and dacite porphyry intrusion. And it has some characteristics of porphyry Cu deposit. The ore deposit has been clearly superimposed and transformed by the later volcanic thermal fluid and secondary enrichment.