CAJ | 학술논문

西藏扎西康铅锌多金属矿床是我国首次发现的喷流沉积－热泉水改造型锰铁锑铅锌银矿床，已有研究表明矿床中除了铅锌矿，还伴生有银、锑、铜、硫、锰、砷等多种元素。本文在化学多元素分析和光学显微镜镜下鉴定的基础上，结合能谱扫描电镜和X射线衍射分析等手段对扎西康铅锌矿中伴生元素Mn的含量、矿物种类、嵌布和包裹等特性进行了研究。分析结果表明，原生矿石的主要成矿元素Pb和Zn的含量分别为6．00％和4．00％，伴生元素Mn的含量平均达到4．36％；原生矿石中的主要矿物为方铅矿、闪锌矿，其次为黄铁矿、毒砂和菱锰矿等。原生矿石中的伴生元素Mn主要以独立的菱锰矿和铁菱锰矿形式存在，与闪锌矿和方铅矿密切共生，是成矿早期重要的载矿矿物，嵌布在石英、黄铁矿、闪锌矿和毒砂的粒间、边部及空隙间，其次以类质同象形式赋存于菱铁矿和菱锌矿中。进一步对扎西康铅锌矿选冶产物中的伴生元素Mn的含量和赋存状态进行研究，研究表明Mn具有较高的综合利用价值，在铅锌原生矿石、铅精矿、锌精矿和尾矿中的质量分数分别为4．36％、0．51％、0．95％和5．36％，显示Mn是很少一部分进入铅精矿和锌精矿，而绝大部分进入尾矿；Mn在尾矿中仍主要以菱锰矿形式存在，存在形式与原生矿石相比未发生改变，可通过强磁选工艺从铅锌尾矿中综合回收利用Mn。
서장찰서강연자다금속광상시아국수차발현적분류침적－열천수개조형맹철제연자은광상，이유연구표명광상중제료연자광，환반생유은、제、동、류、맹、신등다충원소。본문재화학다원소분석화광학현미경경하감정적기출상，결합능보소묘전경화X사선연사분석등수단대찰서강연자광중반생원소Mn적함량、광물충류、감포화포과등특성진행료연구。분석결과표명，원생광석적주요성광원소Pb화Zn적함량분별위6．00％화4．00％，반생원소Mn적함량평균체도4．36％；원생광석중적주요광물위방연광、섬자광，기차위황철광、독사화릉맹광등。원생광석중적반생원소Mn주요이독립적릉맹광화철릉맹광형식존재，여섬자광화방연광밀절공생，시성광조기중요적재광광물，감포재석영、황철광、섬자광화독사적립간、변부급공극간，기차이류질동상형식부존우릉철광화릉자광중。진일보대찰서강연자광선야산물중적반생원소Mn적함량화부존상태진행연구，연구표명Mn구유교고적종합이용개치，재연자원생광석、연정광、자정광화미광중적질량분수분별위4．36％、0．51％、0．95％화5．36％，현시Mn시흔소일부분진입연정광화자정광，이절대부분진입미광；Mn재미광중잉주요이릉맹광형식존재，존재형식여원생광석상비미발생개변，가통과강자선공예종연자미광중종합회수이용Mn。
The Zhaxikang Pb-Zn polymetallic ore deposit,the first SEDEX-modified by hot spring type Mn-Fe-Sb-Pb-Zn-Ag deposit discovered in China,is associated with Pb,Zn,Ag,Sb,Cu,S,Mn,As and other elements. The concentration,mineral species,dissemination and inclusion of Mn in the Zhaxikang Pb-Zn deposit were studied by chemical analysis and examined using Petrographic Microscope,Energy Scanning Electron Microscope and X-ray Diffraction.The analysis showed that the content of ore-forming elements Pb and Zn were 6% and 4%,and the content of the associated component Mn was 4.36%.The main mineral compositions of the Zhaxikang Pb-Zn polymetallic ore deposit are galena,sphalerite,pyrite,arsenopyrite and rhodochrosite.The useful composition of manganese minerals in the mine mostly occurs as rhodochrosite and iron rhodochrosite,which closely associated with sphalerite and galena,an important carrier of mineralization stage,inlay on the edge,intergranular and gap between quartz,pyrite,sphalerite and arsenopyrite.The others occur in siderite and smithsonite with isomorphism forms.The content and occurrence of Mn in Zhaxikang Pb-Zn ore metallurgical produts were analysised,which shows that the comprehensive utilization of Mn is of high value.The mass fraction of Mn in the lead-zinc ore,lead concentrate,zinc concentrate and tailings was 4.36%,0.51%,0.95%and 5.36%,respectively,indicating that little Mn enters into lead concentrate and zinc concentrate,but mostly into tailings.Mn is mainly in rhodochrosite form in lead-zinc tailings,which can be comprehensively recovered and utilized by a high intensity magnetic separation process.