赞比亚砂(页)岩型铜矿成矿年龄及其成因意义

Mineralization Age of the Sediment-Hosted Stratiform Copper deposits in Zambia and its Implications for Deposit Genesis

砂(页)岩型铜矿床是全球第二重要的铜矿类型,重要性仅次于斑岩型铜矿,具有巨大的资源量和找矿潜力。本文总结了砂(页)岩型铜矿床的时空分布特点,然后选取该类矿床的典型——赞比亚砂(页)岩型铜矿床来探讨大型砂(页)岩型铜矿的控矿因素。本文系统论述了赞比亚砂(页)岩型矿床的地质背景,报道了赞比亚铜带省典型矿床卢安夏矿床黄铜矿Rb-Sr放射性同位素等时线年龄为501±19 Ma,Sm-Nd等时线年龄为499.1±38 Ma,总结了赞比亚砂(页)岩型矿床的分布规律,探讨了其成矿物质来源,认为赞比亚砂(页)岩型矿床为岩浆期后热液充填矿床。

As the second most important copper deposit type in the world,ranking the second in importance next to porphyry copper deposits,Sediment-hosted Stratiform Copper Deposits（ SSC） contain huge resources and have a huge prospecting potential. This research summarizes the temporal and spatial distribution characteristics of the SSC deposits in the world,and selects Zambian SSC deposits as a typical case in order to explore the possible controlling factors of large-scale SSC deposits. The geological background of the Zambia SSC deposits was systematically described. New Rb-Sr and Sm-Nd isotopic ages of the chalcopyrite in the Luanshya deposit of Zambia Copper Belt Province are reported as 501 ± 19 Ma and 499. 1 ± 38 Ma,respectively.This paper also summarizes the distribution of the deposits and ore bodies of the SSC deposits in Zambia. The genesis of the SSC Deposits in Zambia is closely related to post-magmatic hydrothermal fluids.