矿物岩石地球化学通报
礦物巖石地毬化學通報
광물암석지구화학통보
BULLETIN OF MINERALOGY PETROLOGY AND GEOCHEMISTRY
2014年
2期
145-153
,共9页
杜泽忠%叶天竺%庞振山%吕志成%梁婉娟%甄世军%张志辉%李永胜%甄世民
杜澤忠%葉天竺%龐振山%呂誌成%樑婉娟%甄世軍%張誌輝%李永勝%甄世民
두택충%협천축%방진산%려지성%량완연%견세군%장지휘%리영성%견세민
流体包裹体特征%铜多金属%折腰山矿床%白银厂%甘肃
流體包裹體特徵%銅多金屬%摺腰山礦床%白銀廠%甘肅
류체포과체특정%동다금속%절요산광상%백은엄%감숙
fluidinclusion characteristic%copper polymetallic%Zheyaoshan deposit%Baiyinchang%Gansu
甘肃白银厂矿田位于祁连山块状硫化物矿床成矿省东部,矿体主要赋存于早-中寒武世石英角斑岩-细碧岩组合中。本文主要对折腰山矿床下盘脉状矿体成矿流体进行研究,分析成矿流体性质及成矿流体来源,探讨其成矿机制。含矿石英中流体包裹体的岩相学和显微测温结果表明,包裹体类型主要有液体包裹体、气体包裹体、纯气体包裹体、含 CO2三相包裹体、纯 CO2包裹体。第Ⅰ阶段包裹体的均一温度为201~413℃,盐度为1.43%~13.40%;第Ⅱ阶段包裹体的均一温度为217~428℃,盐度为1.91%~11.93%(NaCl,wt)。包裹体成分研究表明,成矿流体气相成分主要为 H 2 O,次为 CH4和 CO2,阳离子主要为 Na+,阴离子主要为 Cl-,说明成矿流体为 H 2 O-NaCl-CO2-CH4体系。该矿床下盘脉状矿体的流体为岩浆流体与加热海水的混合流体,引起矿质沉淀的机制为混合作用。
甘肅白銀廠礦田位于祁連山塊狀硫化物礦床成礦省東部,礦體主要賦存于早-中寒武世石英角斑巖-細碧巖組閤中。本文主要對摺腰山礦床下盤脈狀礦體成礦流體進行研究,分析成礦流體性質及成礦流體來源,探討其成礦機製。含礦石英中流體包裹體的巖相學和顯微測溫結果錶明,包裹體類型主要有液體包裹體、氣體包裹體、純氣體包裹體、含 CO2三相包裹體、純 CO2包裹體。第Ⅰ階段包裹體的均一溫度為201~413℃,鹽度為1.43%~13.40%;第Ⅱ階段包裹體的均一溫度為217~428℃,鹽度為1.91%~11.93%(NaCl,wt)。包裹體成分研究錶明,成礦流體氣相成分主要為 H 2 O,次為 CH4和 CO2,暘離子主要為 Na+,陰離子主要為 Cl-,說明成礦流體為 H 2 O-NaCl-CO2-CH4體繫。該礦床下盤脈狀礦體的流體為巖漿流體與加熱海水的混閤流體,引起礦質沉澱的機製為混閤作用。
감숙백은엄광전위우기련산괴상류화물광상성광성동부,광체주요부존우조-중한무세석영각반암-세벽암조합중。본문주요대절요산광상하반맥상광체성광류체진행연구,분석성광류체성질급성광류체래원,탐토기성광궤제。함광석영중류체포과체적암상학화현미측온결과표명,포과체류형주요유액체포과체、기체포과체、순기체포과체、함 CO2삼상포과체、순 CO2포과체。제Ⅰ계단포과체적균일온도위201~413℃,염도위1.43%~13.40%;제Ⅱ계단포과체적균일온도위217~428℃,염도위1.91%~11.93%(NaCl,wt)。포과체성분연구표명,성광류체기상성분주요위 H 2 O,차위 CH4화 CO2,양리자주요위 Na+,음리자주요위 Cl-,설명성광류체위 H 2 O-NaCl-CO2-CH4체계。해광상하반맥상광체적류체위암장류체여가열해수적혼합류체,인기광질침정적궤제위혼합작용。
The Baiyinchang mine-field is located in the east of massive sulfide deposits metallogenic province in Qilian Mountain area.The orebody is hosted in early-middle Cambrian assemblage of baschtauite and spilite.According to the study on the metallogenic fluid characteristic from the vein orebody at the footwall of Zheyaoshan deposit,this paper discusses the metallogenic mechanism,the nature and origin of ore-forming fluid.The petrography and mi-crothermometric results of fluid inclusions in ore-bearing quartz show the inclusion types are liquid inclusion,gase-ous inclusion,pure gaseous inclusion,CO2-bearing three-phase inclusion and pure CO2 inclusion.Respectively,the homogenization temperature of the first stage inclusions is concentrated between 201 ~ 413℃ while the salinity (NaCl)is on 1 .43%~13.40%,as of the second stage inclusions is concentrated between 21 7~428℃ while the sa-linity (NaCl)is on 1 .91 %~1 1 .93%.The composition in fluid inclusions indicates that the gases in fluid inclusions are chiefly composed of H2 O,and the secondary components are CH4 ,CO2 .The cations inclusions are dominanted by Na+ while the anions by Cl- .The ore-forming system is H2 O-NaCl-CO2-CH4 system.The ore-forming fluid from the footwall vein orebody of Zheyaoshan deposit is the mixture of magmatic fluid and the heated sea water, and the ore-forming material derives from mixing of fluids.