吉林海沟金矿床金属矿物的主要特征

海沟矿床是一个大型金矿床。含金石英脉分布于燕山期二长花岗岩体中,金属矿物的研究表明,矿物以自然金、硫化物(黄铁矿、方铅矿、黄铜矿)为主,伴有少量铀矿物(晶质铀矿、沥青铀矿)及碲化物(碲铅矿、碲金矿)。主要的矿物组合为自然金—石英、自然金—硫化物、石英—方解石,它们分别代表不同成矿阶段,金的最大富集发生于自然金一硫化物阶段,金属矿物的某些特征为矿床成因提供了重要信息,它表明矿床成因上不仅与燕山朔岩浆活动有关,而且也与构造—变质期形成的矿源层有关。

Main Characteristics of Ore Minerals in the Haigou Gold Deposit, Jilin Province

The Haigou deposit is a lage-sized gold deposit in China. the Au-bearing quartz veins occur in mongnitic granite. A study on the ore minerals of the deposit indicates: there are a little uranium minerals are telluride in the ore, but predominant ore minerals are native gold and sulfide. Native gold-quaitz, native gold-sulfide and quartz-calsite are predominant mineral parage-nesis. They correspond to main three minerogenetic period. The most part of gold formes in the quartz-sulfide period . the some character of ore minerals furnish important information for the genesis of the deposit. It suggests that the genesis of the deposit not only bear relationship with the magmatic actity of Yenshan stage, but also relates with source-bed formed during the stage of tectonic metamorphish.