黄金科学技术
黃金科學技術
황금과학기술
GOLD SCIENCE AND TECHNOLOGY
2014年
6期
26-32
,共7页
银多金属矿床%地质特征%成矿过程%茶洞银矿%广东省
銀多金屬礦床%地質特徵%成礦過程%茶洞銀礦%廣東省
은다금속광상%지질특정%성광과정%다동은광%광동성
silver polymetallic deposit%geological characteristics%ore-forming process%Chadong silver mine%Guangdong Province
通过野外地质调查、镜下鉴定及对矿床以往资料的综合研究，对茶洞银多金属矿床地质特征、矿石组构、矿物成分、成矿期及成矿阶段进行分析总结，并对矿床成矿作用过程进行了初步探讨。结果表明：矿床矿石具浸染状、脉状、网脉状及块状构造，结构以自形—半自形粒状、不规则粒状和交代为主。矿石成分以氧化物和硫化合物为主，矿物组合主要为银（金）—铅锌系列，以硫化物为主，代表矿物有黄铁矿、毒砂、方铅矿及银矿物等。矿物组合表现为中低温矿物组合特征，成矿温度以中低温为主。矿床成矿过程具有多期、多阶段特点，其中气水热液成矿期为主成矿期，可进一步划分为石英—硫化物阶段和碳酸岩—铅锌硫化物阶段，茶洞银金矿床是在地层、构造及岩浆岩等因素共同作用下形成的中低温热液型矿床。
通過野外地質調查、鏡下鑒定及對礦床以往資料的綜閤研究，對茶洞銀多金屬礦床地質特徵、礦石組構、礦物成分、成礦期及成礦階段進行分析總結，併對礦床成礦作用過程進行瞭初步探討。結果錶明：礦床礦石具浸染狀、脈狀、網脈狀及塊狀構造，結構以自形—半自形粒狀、不規則粒狀和交代為主。礦石成分以氧化物和硫化閤物為主，礦物組閤主要為銀（金）—鉛鋅繫列，以硫化物為主，代錶礦物有黃鐵礦、毒砂、方鉛礦及銀礦物等。礦物組閤錶現為中低溫礦物組閤特徵，成礦溫度以中低溫為主。礦床成礦過程具有多期、多階段特點，其中氣水熱液成礦期為主成礦期，可進一步劃分為石英—硫化物階段和碳痠巖—鉛鋅硫化物階段，茶洞銀金礦床是在地層、構造及巖漿巖等因素共同作用下形成的中低溫熱液型礦床。
통과야외지질조사、경하감정급대광상이왕자료적종합연구，대다동은다금속광상지질특정、광석조구、광물성분、성광기급성광계단진행분석총결，병대광상성광작용과정진행료초보탐토。결과표명：광상광석구침염상、맥상、망맥상급괴상구조，결구이자형—반자형립상、불규칙립상화교대위주。광석성분이양화물화류화합물위주，광물조합주요위은（금）—연자계렬，이류화물위주，대표광물유황철광、독사、방연광급은광물등。광물조합표현위중저온광물조합특정，성광온도이중저온위주。광상성광과정구유다기、다계단특점，기중기수열액성광기위주성광기，가진일보화분위석영—류화물계단화탄산암—연자류화물계단，다동은금광상시재지층、구조급암장암등인소공동작용하형성적중저온열액형광상。
Through field geological survey,the microscopic identification and the comprehensive study of ore deposits with previous materials,the Chadong silver polymetallic ore deposit geological characteristics,ore fabric,mineral composition,metallogenic period and phase analysis were summarized,and the metallogenic process was discussed preliminarily.The results demonstrated that the ore deposit was mainly with disseminated ore,vein,net vein and block structure,moreover,the structure was primarily composed with idiomorphic-hypidiomorphic granular,irregular granular as well as metasomatic structure.Mineral composition was given priority to oxide and sulfur compounds,meanwhile,mineral assemblage was with silver (gold)-lead and zinc series,and primarily with sulfide.Additionally,on behalf of the minerals were pyrite,arsenopyrite,galena and silver minerals,etc. In mineral assemblage was characterized by low temperature mineral assemblage characteristics,and metallogenic temperature mainly in low temperature.Overall,metallogenic process has the characteristics of period and stage,including gas-water hydrothermal mineralization period as the main metallogenic period,which can be further divided into quartz-sulfide stage and carbonate rock-lead and zinc sulfide phase.The Chadong silver gold deposit was low temperature type deposit that formed under the action of a fluid medium,such as strata as well as structure,and magmatic rocks.
