摘要
本文在系统详细的野外地质工作基础上,以仁差盆地南部某矿床为研究重点,系统收集该区地质、地球物理、地球化学资料,对矿床地质特征、矿床成因进行研究分析。认为该矿床为次火山岩型铀矿床,含矿岩性主要为次流纹斑岩,矿体呈脉状、透镜状,矿床达中型规模。矿石物质成分较简单,主要金属矿物有沥青铀矿、铀石、铀钍石。该区铀源、热源、水源丰富,成矿物质和水体来源具有明显的双重性,其矿床成因应属于与火山作用有关的,有火山热液、火山热水和地下水联合作用叠加再造富集而成的复成因(构造+岩性+热液蚀变)矿床,它具有内生与外生的双重性,经历了内生——外生——表生作用的复杂过程。
In this paper,the research is focused on deposits of south Rencha Basin.On the basis of systematic and detailed field geological work,systematically collected the geological、geophysical、geochemical data of this area,did research and analysis on the geological characteristics and deposit causes.The deposit is a middle-scaled subvolcanic uranium deposit.Its main ore-bearing lithology is subrhyolite-porphyry.The ore bodies are vein and lenticular.Ore composition being simple,the main metal minera is are pitchbllende、coffinite and uranothorite.Through analysis of the metallogenic mechanism,think uranium source,heat source,water source are rich in this area.Since ore forming material and water sources have obvious dualism,genesis of the deposit should be related to volcanism.It is a polygenetic stratabound deposit which is overlayed、reconstructed、enriched through the joint effect of volcanic hydrothermal、volcanic hot water and underground water.The deposit has gone through complex process of long-term distribution、endogenous--exogenous--surface effect,so it has the dual nature of endogenous and exogenous.
作者
余端珍
YU Duan-zhen(Guangdong Province Nuclear Industry Geological Bureau 292 Team, Heyuan 517001,China)
出处
《世界有色金属》
2018年第1期226-228,共3页
World Nonferrous Metals
关键词
矿床特征
地球化学
矿床成因
粤东北
Deposit Characteristics
Geochemistry Characteristics
Genesis Of Deposits
Northeastern Guangdong
