摘要
永平铜矿产于中石炭统地层中,是一大型的海底火山热液沉积经后期构造、岩浆改造的块状硫化物矿床。矿区产出“层状矽卡岩”,其规模远大于岩浆侵入体,与围岩整合产出。本文的研究表明:“层状矽卡岩”并非侵入体与碳酸岩发生接触交代作用的产物,而是沉积—火山沉积经后期改造形成的。“层状矽卡岩”与矿体在空间上共存,时间上经历了相同的发展阶段,“层状矽卡岩”对矿化起了进一步富集的作用。
Yongping copper ore deposit is confined to the Middle Carbonifero formation.It is a large-scale submarine volcanic hydrotnermal sedimentary massive sulfide deposit reformed by the late tectonism and magmatic intrusion.In the ore deposit area”“bedded skarns”are much larger than the magmatic intrusion and occur as a continuous bed conformable with the wall rock. This paper shows that the formation of the “bedded skarns” is not due to the contact replacement between the magmatic intrusion and the carbonate rocks,but because of the reformation of the sediment and submarine volcanic sediment by the late tectonism and magmatic intrusion.They coexist closely with ore bodies in space,and have experienced the same development in time.They furtner enriched ore bodies.
关键词
铜矿
层状矽卡岩
块状硫化物
Yongping copper ore deposit “bedded skarns” massive sulfide deposit
submarine volcanic sediment
