河南科学
河南科學
하남과학
HENAN SCIENCE
2014年
8期
1571-1575
,共5页
龙湾铅锌矿%矿石组构%成矿期次%成矿阶段%矿床成因
龍灣鉛鋅礦%礦石組構%成礦期次%成礦階段%礦床成因
룡만연자광%광석조구%성광기차%성광계단%광상성인
Longwan Pb-Zn mine%ore fabric%metallogenetic period and stage%stage of mineralization%ore genesis
通过井下的详细勘查和显微镜下鉴定,对广西龙湾铅锌矿床的矿石组构特征进行了系统研究.矿区矿石构造主要为块状构造、浸染状构造、网脉状构造和斑杂状构造;结构主要为结晶作用和交代作用形成的结构,其次为固溶体分离作用、结晶物质重结晶作用和压力作用形成的结构.同时将成矿期次分为沉积成岩期、中低温热液成矿期和表生氧化期,其中热液成矿期是矿床的主要成矿期.根据矿物组合特征,将成矿划分为五个成矿阶段,分别是黄铁矿-石英-方解石阶段、闪锌矿-方铅矿-黄铁矿阶段、黄铁矿-闪锌矿-方铅矿-黄铜矿阶段、石英-方解石阶段、氧化物阶段.矿物的生成顺序为黄铁矿1-闪锌矿(黄铜矿1)-方铅矿-黄铁矿2-黄铜矿2.最终确定龙湾矿床为受构造活动控制的中低温热液充填交代-叠生改造型多金属矿床.
通過井下的詳細勘查和顯微鏡下鑒定,對廣西龍灣鉛鋅礦床的礦石組構特徵進行瞭繫統研究.礦區礦石構造主要為塊狀構造、浸染狀構造、網脈狀構造和斑雜狀構造;結構主要為結晶作用和交代作用形成的結構,其次為固溶體分離作用、結晶物質重結晶作用和壓力作用形成的結構.同時將成礦期次分為沉積成巖期、中低溫熱液成礦期和錶生氧化期,其中熱液成礦期是礦床的主要成礦期.根據礦物組閤特徵,將成礦劃分為五箇成礦階段,分彆是黃鐵礦-石英-方解石階段、閃鋅礦-方鉛礦-黃鐵礦階段、黃鐵礦-閃鋅礦-方鉛礦-黃銅礦階段、石英-方解石階段、氧化物階段.礦物的生成順序為黃鐵礦1-閃鋅礦(黃銅礦1)-方鉛礦-黃鐵礦2-黃銅礦2.最終確定龍灣礦床為受構造活動控製的中低溫熱液充填交代-疊生改造型多金屬礦床.
통과정하적상세감사화현미경하감정,대엄서룡만연자광상적광석조구특정진행료계통연구.광구광석구조주요위괴상구조、침염상구조、망맥상구조화반잡상구조;결구주요위결정작용화교대작용형성적결구,기차위고용체분리작용、결정물질중결정작용화압력작용형성적결구.동시장성광기차분위침적성암기、중저온열액성광기화표생양화기,기중열액성광기시광상적주요성광기.근거광물조합특정,장성광화분위오개성광계단,분별시황철광-석영-방해석계단、섬자광-방연광-황철광계단、황철광-섬자광-방연광-황동광계단、석영-방해석계단、양화물계단.광물적생성순서위황철광1-섬자광(황동광1)-방연광-황철광2-황동광2.최종학정룡만광상위수구조활동공제적중저온열액충전교대-첩생개조형다금속광상.
Ore-fabric characteristics of Pb-Zn deposit systematic study in Longwan,Guangxi by detailed exploration of mine and the microscopic identification. Ore structure is mainly massive structure,dissemination structure,stockwork structure and taxitic structure. The texture is mainly formed in metasomatism and crystallization ,secondly for solid solution separation,crystallized matter recrystallization and pressure effect. Mineralization periods into sedimentary diagenesis,in epithermal mineralization period and supergene oxidation stage,the hydrothermal mineralization period mainly is the deposit metallogenic period. According to the characters of mineral composition,the mineralization is divided into five stages of mineralization,which is pyrite-quartz-calcite stage,sphalerite-galena-pyrites stage, pyrite-sphalerite-galena-chalcopyrite stage,quartz-calcite stage,oxide stage.Mineral equence is pyrite 1-sphalerite (chalcopyrite1)-galena-pyrite 2-chalcopyrite2. It is determined that Longwan ore deposit is low-temperature hydrothermal filling account-storeyed reworked polymetallic deposits control by tectonic activity.