摘要
金堆城钼矿床位于东秦岭钼矿带,是中国最大的斑岩型钼矿床.根据钻孔及填图资料,结合室内手标本和光薄片鉴定结果,可知金堆城钼矿床共发育九种不同类型的蚀变:钾长石化、黑云母化、硅化、绢云母化、黄铁矿化、绿帘石化、绿泥石化、碳酸盐化及高岭土化.根据蚀变类型及蚀变矿物共生组合特征,可将其自岩体向外划分为钾化带、石英-绢云母化带及青磐岩化带,钼矿化在钾化带中发育最为强烈,但范围较窄;在石英-绢云母化带中发育最为广泛,是钼矿的主要赋存部位;在青磐岩化带发育较弱,矿体范围不会超过青磐岩化带的范围.因此,钾化带和石英-绢云母化带可作为找矿靶区.
Jinduicheng molybdenum deposit, located in molybdenum ore belt of eastern Qingling, is the largest porphyry molybdenum deposit in China. Nine different types of alteration were found in Jinduieheng molybdenum deposit according to the drilling and mapping data, and the identification results of hand specimens and the polished thin section, including pot- ash feldspathization, biotitization, silicification, sericitization, pyritization, epidotization, chloritization, carbonatization and kaolinization. Alteration can be divided into the potassic zone, the quartz-sericite zone and the propylitic zone from the rock mass inner to the outward according to the alteration type and mineral assemblage. Molybdenum mineralization is the most strongest in the potassium zone, but the altered range is relatively small. Molybdenum mineralization is mainly distrib- uted in the quartz-serieite zone since this alteration zone is relatively extensive. It exists less in the propylitic zone and ore bodies are restricted within the propylitic zone in space. Therefore, the potassic zone and the quartz-serieite zone can be used as the prospecting target area.
出处
《南方金属》
CAS
2017年第3期30-34,41,共6页
Southern Metals
关键词
蚀变分带
蚀变类型
金堆城钼矿床
东秦岭
alteration zonation
alteration types
Jinduieheng molybdenum deposit
east Qinling
