摘要
西秦岭南亚带硅灰泥岩型金矿床是我国新近突破的一种新型的很有发展远景的金矿类型.本文从后生成矿的宏观地质证据,金铀成矿关系,含金矿物包裹体的氢氧同位素分析和^(39)Ar-^(40)Ar法年龄测定四个方面研究了金的成矿年龄,证明该类型矿床金成矿与成岩间存在一个很大的时差,金成矿作用发生很晚,在新生代新老第三纪的交替时期.
The silicated mudstone type gold deposit in South Subzone of West Qinling ascertained in recent time is a new and promising gold deposit type. The gold metallogenetic age of this type gold deposit is studied in this paper from four angles, ie. the epigenetic geological evidence, the relation between gold and uranium metallogenesis, the hydrogen isotopic analysis of gold-bearing mineral inclusion and the age determination by 89Ar-40Ar method. According to study, it is proved that a great time difference existed between the gold metallogenesis of this gold deposit and rock-forming besides the gold metallogenesis took place when the new tertiary period replaced the old tertiary period of cenozoic era.
出处
《黄金》
CAS
北大核心
1993年第10期9-12,8,共5页
Gold
关键词
硅灰泥岩型
金矿床
成矿期
metallogenetic era
39Ar-40Ar method
age determination
silicate mudstone type
