摘要
460矿床是我国北方中生代火山岩区近年来新发现的铀矿床。系统的同位素年龄测定结果表明,本矿床的铀矿化作用主要发生于两个时期:早期矿化(浸染状矿石)发生于88Ma前,而晚期矿化(脉状矿石)的年龄仅24Ma。由此确定本矿床系后成中低温热液铀矿床,成矿物质主要来源于基底岩石,经重熔的火山岩浆富集后提供成矿。
The deposit No.460 is a uranium deposit newly discovered in recent years in Mesozoic volcanic rock area, North China. Systematic results on isotope dating indicate that uranium mineralization in this deposit occurred mainly in two periods: early mineralization(desseminated ore) occurred around 88 Ma, but late mineralization(veined ore) —24 Ma. Thus this deposit is identified as a meso-to epithermal uranium deposit. Metallogenetic material was mainly derived from basement rocks, and provided to form ore deposit through enrichment by remelted volcanic magma.
出处
《铀矿地质》
CSCD
北大核心
1989年第4期203-208,共6页
Uranium Geology
关键词
铀矿床
矿化期
同位素
年龄
Uranium minerogenetic epoch, Isotope age, Uranium-lead method
