西藏多不杂铜金矿床成矿元素空间分布特征

Element Spatial Distribution of the Duobuza Copper-gold Deposit in Tibet

多不杂矿床已成为班公湖-怒江成矿带上具有代表意义的超大型铜多金属矿床。根据矿区41个钻孔的Cu、Au成矿元素化学分析结果,东西方向上,Cu、Au平均品位变化较大,中西部高,东西两侧低,矿体厚度在中西部最厚,中部次之;南北方向,Cu、Au平均品位变化规律较为明显,中北部Cu、Au明显较高。成矿元素垂向分布看,总体呈不均匀变化趋势,Cu、Au品位变化较大,贫富相渐,斑岩体及接触带附近成矿元素聚集,品位较高,变砂岩中品位相对较低。

Duobuza copper deposit has become a public representatively large copper polymetallic deposit, Cu, Au grade change is bigger, porphyry and ore-forming elements gathered near contact zone, high grade, grade is relatively low in variable sandstone; Cu, Au, suggested the mutiperiodie mineralization characteristics. More complex of intermediate-acid intrusive rocks in the mining drilling control mineralization occur in common. Realized the intrusive rocks, mainly in mining area in the Midwest a north--south west to east on the strip, with many not miscellaneous mining area of intrusive rocks are mainly distributed range is consistent.