3701矿床成矿物质来源分析

Analysis on metallogenic material source of Deposit 3701

3701矿床是一个以U为主,与Cu、Pb、Ag、Zn共生、伴生的多金属矿床,属碳硅泥岩型矿床。文章简单介绍了矿区地质、矿区构造、赋矿围岩、围岩蚀变、赋矿层位及矿化特征,对正常、蚀变及含矿围岩(含花岗岩体)的铀含量、分布特征、各种岩石的人工条件和天然条件下的铀浸出率资料进行分析以确定铀大致来源。对原有的氧同位素资料进行综合分析,最后提出铀的成矿物质主要来自花岗岩,部分来自围岩的判断。根据掌握的资料,提出大致的铀矿床成矿机理模型。

Deposit 3701 is a uranium dominated polymetallic deposit associated with Cu、 Pb、 Ag、Zn. It belongs to carbonaceous-siliceous-argillaceous rock type deposits. This paper introduces briefly the geology of deposit, host rock, wall rock alteration, ore bed and mineralization characteristics.Uranium content innormal, alteration and ore-bearing wall rock（contain granitoid intrusion）distribution characteristics and extraction rate of uranium under natural and artificial conditions are analyzed to identify the sources of uranium. Original data of oxygen isotope is analyzed by synthesis,which turned out that main metallogenetic elements mostly came from granite and some from wall rock.Based on summarizing the collected data, uranium mineralization mechanism model was proposed.