CAJ | 학술논문

班公湖-怒江成矿带跨班公湖-怒江缝合带两侧，是近年来发现的一条重要的多金属成矿带。商旭金矿床位于班公湖-怒江缝合带中段，主要矿体呈透镜状或脉状产于中-下侏罗统木嘎岗日群浅变质海相复理石建造中，受近东西向断裂构造控制。矿石类型以石英脉型为主，其次为蚀变岩型，近矿围岩蚀变较弱，蚀变类型包括硅化、绢云母化、绿泥石化、碳酸盐化等。矿石中金属矿物主要为自然金、黄铁矿及方铅矿；脉石矿物以石英、方解石以及黏土矿物为主。初步研究表明，该矿床主要受地层及构造因素控制，成因类型为造山型金矿床。在此基础上，初步总结了矿区的主要找矿标志，包括岩性及构造标志、蚀变标志、硫化物标志、化探异常及古采矿遗迹标志等，并认为区域上存在找到商旭式金矿床的可能。
반공호-노강성광대과반공호-노강봉합대량측，시근년래발현적일조중요적다금속성광대。상욱금광상위우반공호-노강봉합대중단，주요광체정투경상혹맥상산우중-하주라통목알강일군천변질해상복리석건조중，수근동서향단렬구조공제。광석류형이석영맥형위주，기차위식변암형，근광위암식변교약，식변류형포괄규화、견운모화、록니석화、탄산염화등。광석중금속광물주요위자연금、황철광급방연광；맥석광물이석영、방해석이급점토광물위주。초보연구표명，해광상주요수지층급구조인소공제，성인류형위조산형금광상。재차기출상，초보총결료광구적주요조광표지，포괄암성급구조표지、식변표지、류화물표지、화탐이상급고채광유적표지등，병인위구역상존재조도상욱식금광상적가능。
Bangongco-Nujiang meteallogenic belt which spans to both sides of Bangongco-Nujiang suture belt,is one of polymetallic meteallogenic belts with huge ore potentials .Shangxu gold deposit is located in the middle part of Bangongco-Nujiang suture belt,the main ore bodies of which occur in the low metamorphic marine clastic rocks of the middle-low Jurassic Mugagangri group as lens or veins and are mainly controlled by nearly EW faults .The major ore type is of quartz vein,and secondary of altered rock.Adjacent wall rock didn't undergo a clear hydrothermal alteration, and the main alteration type includes silicification ,sericitization,chloritization and carbonatization etc .Ore minerals mainly are native gold,then little of galena,pyrite,and gangue minerals mostly quartz,calcite and clay minerals.Pre-liminary research indicates that Shangxu gold deposit is mainly controlled by strata and structure .It belongs to orogenic gold deposits.Some major exploration indicators of the gold ore are summed up on the basis of the above analysis ,in-cluding lithological and structural criteria ,alteration criteria,sulfide mineral criteria,geochemical exploration anomaly and remains of previous mining tunnels etc .The paper proposes that it is possible to find more primary gold deposits similar to that of Shangxu in Bangongco-Nujiang suture belt.