黄金科学技术
黃金科學技術
황금과학기술
GOLD SCIENCE AND TECHNOLOGY
2014年
6期
18-25
,共8页
张志军%龚庆杰%刘辰曦%沈柳生
張誌軍%龔慶傑%劉辰晞%瀋柳生
장지군%공경걸%류신희%침류생
地球化学%成矿流体%白马崖金矿%康定矿田
地毬化學%成礦流體%白馬崖金礦%康定礦田
지구화학%성광류체%백마애금광%강정광전
geochemistry%ore forming fluid%Baimaya gold deposit%Kangding ore field
白马崖金矿床处于康滇地轴北,是康定杂岩体内典型的石英脉—蚀变岩型金矿床。矿区出露古老的变质结晶杂岩基底,多呈刚性较强的块状岩石,岩性以斜长角闪岩、黄铁绢英岩、绢英片岩和构造片岩等为主。矿石矿物以石英为主,占90%以上,含少量绢云母、黄铁矿及其他硫化矿物。矿区断裂以近SN向脆—韧性剪切断裂为主,具多期次活动特点。通过矿床地球化学主量元素、稀土元素、硫同位素及流体包裹体的研究,白马崖金矿区围岩与蚀变岩在稀土元素配分曲线上均表现为缓右倾型;白马崖金矿床δ34S变化于-2.1‰~4.4‰之间,均值为1.6‰;含矿石英中流体包裹体以富含CO2为特征。白马崖金矿床断裂构造发育,深部岩浆流体带来成矿物质,并对围岩进行改造,富集成矿,对于进一步的研究和找矿工作具有一定的指导意义。
白馬崖金礦床處于康滇地軸北,是康定雜巖體內典型的石英脈—蝕變巖型金礦床。礦區齣露古老的變質結晶雜巖基底,多呈剛性較彊的塊狀巖石,巖性以斜長角閃巖、黃鐵絹英巖、絹英片巖和構造片巖等為主。礦石礦物以石英為主,佔90%以上,含少量絹雲母、黃鐵礦及其他硫化礦物。礦區斷裂以近SN嚮脆—韌性剪切斷裂為主,具多期次活動特點。通過礦床地毬化學主量元素、稀土元素、硫同位素及流體包裹體的研究,白馬崖金礦區圍巖與蝕變巖在稀土元素配分麯線上均錶現為緩右傾型;白馬崖金礦床δ34S變化于-2.1‰~4.4‰之間,均值為1.6‰;含礦石英中流體包裹體以富含CO2為特徵。白馬崖金礦床斷裂構造髮育,深部巖漿流體帶來成礦物質,併對圍巖進行改造,富集成礦,對于進一步的研究和找礦工作具有一定的指導意義。
백마애금광상처우강전지축북,시강정잡암체내전형적석영맥—식변암형금광상。광구출로고로적변질결정잡암기저,다정강성교강적괴상암석,암성이사장각섬암、황철견영암、견영편암화구조편암등위주。광석광물이석영위주,점90%이상,함소량견운모、황철광급기타류화광물。광구단렬이근SN향취—인성전절단렬위주,구다기차활동특점。통과광상지구화학주량원소、희토원소、류동위소급류체포과체적연구,백마애금광구위암여식변암재희토원소배분곡선상균표현위완우경형;백마애금광상δ34S변화우-2.1‰~4.4‰지간,균치위1.6‰;함광석영중류체포과체이부함CO2위특정。백마애금광상단렬구조발육,심부암장류체대래성광물질,병대위암진행개조,부집성광,대우진일보적연구화조광공작구유일정적지도의의。
The Baimaya gold deposit located in north of the Kang-Dian was typical quartz vein-altered rock type gold deposit in the Kangding complex rock mass.Old metamorphic crystalline complex mining area exposed basement and formed strong blocky rock rigidity mainly with amphibolite plagioclase,spun silk the schist as well as tectonic schist,etc.Key component of ore mineral was quartz that accounted for more than 90%,and contained a small amount of sericite,pyrite and other sulfide minerals.Fracture of mining area was seemed to be the SN direction with brittle-ductile shear fracture,which displayed various characteristics of the activity.Through studying the main elements of ore deposit geochemistry,rare earth elements,sulfur isotope,and fluid inclusion, obviously,surrounding rock and altered rock of the Baimaya gold deposit in rare earth elements distribution curve belonged to the right type.δ34S of the gold deposit varied between 2.1‰and 4.4‰ with the average of 1.6‰,and containing fluid inclusions in ore was characterized by rich CO2 The Baimaya gold deposit presented fault development with metallogenic substances brought by the deep magmatic fluid that could improve the surrounding rock and enrichment,which was of great significance for further research and the ore-prospecting work in the future.