广西五圩矿田箭猪坡矿床锡多金属矿地球化学特征及找矿意义

Geochemical characteristics and prospecting significance of Jianzhupo tin polymetallic deposit in Wuxu ore field,Guangxi

箭猪坡矿床是丹池成矿带上以锑铅锌为主的多金属矿床。近年通过老矿山找矿勘查项目,首次发现了石英脉型锡矿体,锡以锡石为主。通过对矿床流体包裹体、矿石稀土元素、氢氧同位素及硫同位素特征的综合分析,认为该矿床属中低温热液裂隙充填成因。通过与大厂锡矿田垂向分带的对比,推测箭猪坡矿床浅部所揭露的脉状铅锌锑矿体及钻孔中揭露的石英脉型锡矿体,仅相当于大厂矿田上部脉状矿[中低温脉状(锡石)硫化物矿床矿带],中深部的中高温—高温矿带、隐伏花岗岩体尚未揭露,箭猪坡矿床找矿空间宽,找矿潜力大。

Jianzhupo deposit is a polymetallic deposit mainly consisted of antimony,lead and zinc orebodies in the Danchi metallogenic belt for the recent years.Through mineral prospecting and exploration project of national mine,the quartz vein type tin orebody has been discovered for the first time in the mining area,and tin mineral is mainly dominated by cassiterite.Based on a comprehensive analysis of the deposit feature of fluid inclusion,rare earth element,hydrogen,oxygen and sulfur isotopic feature,the paper has summarized and analyzed the deposit genesis.It is recognized that the deposit belongs to the genesis type of hydrothermal fissure-filled deposit at medium and low temperature.By compared with the vertical zonation of Dachang ore field,it is speculated that the vein type Pb-Zn-Sb orebodies,exposed in the shallow part of Jianzhupo deposit and the quartz-vein-type Sn orebodies exposed in the drillinghole,only corresponds to the vein type orebody in the sulfide ore belt(cassiterite)of low-medium temperature vein type in the upper part of Dachang ore field.The medium-high and high temperature ore belt in the middle and deep parts has not been controlled by the drilling,and the concealed granite body has not been conformed yet.There is a great mineral prospecting potential for Jianzhupo deposit in extensive ore prospecting space.