摘要
民乐浸染状铜矿产于中三叠统灰流型富钠质熔结凝灰岩中。矿区火山岩主体为细碧角斑岩系,矿床的形成与陆内再生地槽海相火山活动及其后的热液蚀变作用密切相关。矿体分布明显受火山岩岩性、岩相、层位及构造控制,成因上与火山喷发和爆发作用有关。矿床受后期火山热液、次生富集改造后富化明显。
The Minle disseminated Cu deposit is occurred in the Middle Triassic Narich ash flow ignimbrite.The main volcanic rock in this orefield belongs to the spilitekeratophyre sequence.The formation of this deposit is closely related to the marine volcanism and the following hydrothermal alteration in the inland resurgent geosyncline.The orebody distribution is controlled evidently by the lithological character,lithofacies,horizon of volcanic rock and the structure.And the ore deposit has been enriched clearly by the secondary concentration reformation of the following volcanic thermal fluid.
出处
《云南地质》
2003年第1期80-88,共9页
Yunnan Geology
关键词
细碧角斑岩系
灰流型铜矿
火山喷发热液
次生富集
最谷民乐
Spilite-keratophyre Sequence
Cu Deposit
Ash Flow Type
Volcanic Eruption and Thermal Fluid
Secondary Concentration
Minle,Jinggu
