东秦岭两种新型钼矿床的矿物特征及成因分析

Minerals characteristics of the two new types of Mo deposits in East Qinling with the studying on their genesis

东秦岭地区发现了两种新型的钼矿床——花岗岩型钼矿床和石英脉状钼矿床。花岗岩型钼矿床矿体赋存于花岗岩中,石英脉型钼矿与石英脉关系密切,矿体分布在石英脉的上下部流纹岩中,前者成矿与燕山期花岗岩热液有关,而后者是否是燕山期花岗岩热液的产物还有待进一步研究。两种类型钼矿床中的辉钼矿与石墨关系密切。

Two new types of Mo deposits are found in East Qinling, that are granite-host Mo deposit, where the Mo orebodies are hosted by granites, and quartz vein-host Mo deposit, which has a close relationship with quartz vein and the orebodies occurred in upper and lower rhyolites in quartz vein. The granite-host Mo deposit is associated with Yanshanian granite hydrothermal fluids, whereas a further study need to be practiced to find out whether the quartz vein-host Mo deposit has some relationship with the Yanshanian granite hydrothermal fluids. Molybdenites from both kinds of Mo deposits are closely associated with graphite.