青海祁漫塔格虎头崖矿区砷硫锑铅矿的发现及其意义

Discovery of geocronite in Hutouya mining area of Qimantage,Qinghai and its significance

砷硫锑铅矿是世界上较为罕见的一种硫盐矿物,它对于区域地质构造背景和成矿研究具有重要意义。笔者有幸在青海祁漫塔格地区的虎头崖矿床内发现这种矿石,属青海省首例,也是迄今为止青海省唯一的一处发现。本文通过对虎头崖矿区砷硫锑铅矿特征的分析,得出以下2点主要认识:①虎头崖矿床砷硫锑铅矿的发现,佐证了祁漫塔格地区中元古代大地构造背景属于被动大陆边缘环境;②证实中元古代具有成矿的事实,虎头崖矿床能达到大型规模,与中元古代成矿物质的预富集密切相关。

Geocronite is a rare sulfosalt mineral throughout the world and it has great significance to study on regional geological tectonic setting and mineralization. The geocronite that was discovered in Hutouya ore district is the first and unique one in Qinghai province. Based on geocronite feature study, two main conclu- sions were obtained. （1） The discovery of geocronite indicates that mesoproterozoic Era tectonic setting be- longs to passive continental margin in Qimantage area; （2） The fact that mineralization happened in Meso- proterozoic Era is confirmed and it is recognized that Hutouya large-scale deposit is related to advance enrich- ment of Mesoproterozoic Era mineralization substance.