青海陆日格斑岩钼铜矿床地质特征及矿化赋存状态研究

Geological Characteristics and Mineralization Occurrence in Lurige Porphyry Molybdenum-copper Deposit,Southern Qinghai Province

陆日格斑岩钼铜矿床为近期于青海南部三江北段发现的斑岩钼铜矿床(点),在矿床野外地质调查基础上,利用室内显微观察、电子探针分析技术,研究了陆日格矿床矿石组构、成分及伴生元素Mo、Cu、Pb、Zn、Ag、Re等的赋存状态。研究表明,陆日格矿床以浸染状、细脉状构造为主,发育大量石英-多金属硫化物脉、石英-绢云母-多金属硫化物脉和石英-碳酸盐脉等。根据矿床矿化产出及矿石组构特征,进行了成矿阶段划分。陆日格矿床具备较全的斑岩热液-期后热液矿床的矿化元素组合,表明其良好的找矿潜力。

Located on the northern portion of Sanjiang polymetallic ore belt, Sourthern Qinghai province, the Lurige deposit is a recently discovered porphyry molybdenite-copper deposit. Based on the field geolog- ical survey, this paper study ore fabrics, minerlization composition and occurrence of associated element by microscopic observation and electron microprobe analysis techniques. Study show that Lurige deposit min- eralization structure are mainly disseminate and vein let and grow a large number of quartz-polymetallic sulfide veins, quartz-sericite-polymetallic sulfide veins, quartz carbonate veins and so on. According to field characteristics of the ore deposit and fabric characteristics, the ore-forming process has been divided. Lureige deposit have the similar complete mineralization combination to porphyry hydrothermal deposits, which show its excellent exploration potential.