【摘要】 <正> 都龙锡矿床分布在马关县都龙镇之东,是老君山锡钨多金属成矿区中已知最大的矿床。一、区域及矿床地质概况老君山成矿区横跨马关、麻粟坡两县,面积>500km~2。古生代以来,本区经历了同生沉积、变质改造和岩浆活动等一系列的地质作用,伴随着复杂的成矿过程。更多还原

【Abstract】 The Dulong tin ore deposit is distributed in E of Dulong town,Maguan County,Southeastern Yunnan,being the largest one known in the tungsten- tin polymetallic metallogenic province of Laojunshan.This is a type of cas- siterite-sulfide polymetallic ore deposit occurring in the alternating belt of mica-quartz schist and epizonal marble with Middle Cambrian age.It is situ- ated on the outer contact belt of south part of Laojunshan Granite because of the buried granite mass dipping to the S being able to show in deep part.The metallization was predominantly controlled by the granite,faults,fissures and lithologies of country rock.The granite was the parent rock of this deposit, some faults played the guided ore rules,others played the rules of transfer station for ore solution migration (called “assigned structures”) while the enc- losing structures were the branched fissures of the “assigned structures”.The alternating belt for both lithologies was the medium of ore matters deposited, of which the think-bedded plastic schists could prevent ore solution to loss as one kind of ejective bed.更多还原