CAJ | 학술논문

都龙锡锌超大型矿床是中国第三大锡石硫化物矿床,其中的绿泥石化相当普遍,并与矿化关系密切.本文在岩矿鉴定基础上,利用电子探针对绿泥石进行了微区化学成分研究.研究结果表明,该矿床绿泥石为富铁种属的假鳞绿泥石、鲕绿泥石、蠕绿泥石(铁绿泥石)及铁镁绿泥石,指示形成于还原环境;绿泥石为泥质岩或铁镁质岩受热液交代蚀变的产物,绿泥石结构的离子置换主要体现为Fe对Mg的置换,反映其形成与含铁建造有关;绿泥石的形成温度为231～304℃,平均为269℃,属于中-低温范围.绿泥石的形成机制主要表现为溶蚀-结晶、溶蚀-迁移-沉淀结晶2种.绿泥石可能与锡成矿同期形成,其与矿石矿物的生成关系表明,燕山期岩浆活动对都龙矿床的叠加改造作用显著.
도룡석자초대형광상시중국제삼대석석류화물광상,기중적록니석화상당보편,병여광화관계밀절.본문재암광감정기출상,이용전자탐침대록니석진행료미구화학성분연구.연구결과표명,해광상록니석위부철충속적가린록니석、이록니석、연록니석(철록니석)급철미록니석,지시형성우환원배경;록니석위니질암혹철미질암수열액교대식변적산물,록니석결구적리자치환주요체현위Fe대Mg적치환,반영기형성여함철건조유관;록니석적형성온도위231～304℃,평균위269℃,속우중-저온범위.록니석적형성궤제주요표현위용식-결정、용식-천이-침정결정2충.록니석가능여석성광동기형성,기여광석광물적생성관계표명,연산기암장활동대도룡광상적첩가개조작용현저.
The Dulong superlarge Sn-Zn deposit is the third largest cassiterite sulfide deposit in China. Chlorite is one of the main hy-drothermal alteration minerals genetically related to tin mineralization in this ore deposit. By means of microscopic and electron micro-probe analysis, the user investigated chemical composition and texture of the chlorite and concluded that chlorites in the Dulong Sn-Zn deposit have the following characteristics: ① they are mainly Fe-rich chlorites composed of pseudothuringite, chamosite, prochlorite and brunsvigite, indicating a reducing environment during their user; ②they were produced by hydrothermal alteration of pelitic or mafic rocks, and the phenomenon that Fe-Mg substitution dominates the octahedral substitution suggests that their formation had to do with the iron-rich formation; ③they were formed at temperatures of 231-304℃ (averagely 269 ℃ ) , in the range of low-mod-erate temperature; and ④ both chlorites and cassiterite were formed in the Late Yanshanian magmatic hydrothermal ore-forming user that occurred under the low-moderate temperature reducing condition.