摘要
文章从安妥岭斑岩型钼矿床的地质、蚀变特征及蚀变分带研究入手,认为硅化和钾长石化岩石的钼含矿性最强,硅化和钾长石化与钼成矿关系密切。蚀变类型有:硅化、钾化、绢云母化、青磐岩化(绿泥石-绿帘石-碳酸盐化)、水黑云母化、黄铁矿化等,各种类型互相过渡,互相迭加,呈现了多期多阶段的蚀变特征。研究表明,围岩蚀变始终伴随着钼成矿作用的每个阶段,且不同的成矿期和成矿阶段、不同的围岩,其蚀变类型不同。矿床蚀变分带明显,由岩体中心向外侧依次为硅化—钾长石化带(强蚀变带)、硅化-绢云母化带、青磐岩化(硅化)带及硅化—黄铁矿化带(弱蚀变带),强度由中心向外围逐渐减弱,其蚀变作用的强弱与钼矿体的品位高低相对应,确定硅化和钾长石化是该区最有效的找矿标志之一。
Based on the geological,alteration,alteration zoning characteristics of the Antuoling porphyry Mo deposit,it is considered that the molybdenum ores occurs in silicification and k-feldspar rocks.The alteration types include silicification,k-feldspar,sericite,（chorite,epidotization,carbonation）,hydromicazation,pyritization,etc.,they are transition each other,superposition each other,showing the characteristics of multi-stage alteration,The results show that surrounding rock alteration associated with molybdenum mineralization at every stage in different metallogenic periods and metallogenic stages,different surrounding rocks,altered types.The deposit shows obvious altered zoning,from rock bodies center to the outside,silicification-k-feld spar（strong alteration zone）,silicification-sericitization zone,sericite（silicification）zone and silicification –pyriteization zone（weak alteration zone）.the intensity decreased gradually from the center to the periphery.The alteration corresponds to the grade level of molybdenum ore bodies.The study shows that silicification and k-feldspar should be the most effective prospecting criteria.
出处
《吉林地质》
2011年第2期52-56,共5页
Jilin Geology
关键词
围岩蚀变
硅化
青磐岩化
钼矿床
surrounding rock alteration
silicification
propylitization
Mo deposit
