大兴安岭多布库尔河上游钼多金属异常特征及找矿前景探讨

位于伊勒呼里火山岩隆起带与大兴安岭火山岩带衔接部位的多布库尔河上游在1／5万水系沉积物测量中发现钼多金属异常，以Mo为主，伴生Ag、Pb、Zn、Cu、Au、As、Sb、Bi。异常面状分布，浓集中心明显，具浓度分带，浓度梯度大。经土壤测量验证，异常再现良好，经槽探揭露，发现钼矿体。矿体赋存在流纹斑岩体及隐爆角砾岩内，矿物主要为辉钼矿，少量方铅矿、闪锌矿和黄铜矿，呈微细脉状及侵染状。蚀变有硅化、绢云母化、绿帘石化、高岭土化、黄铁矿化。推测矿床成因为斑岩型钼多金属矿床，找矿前景乐观。

Mo polymetallic anomalies' characteristics of upriver Duobuku'er river in Daxing'anling with its prospecting perspective discussion

According to the 1 ： 50,000 measurement of stream sediment in upriver Duobuku＇er river, which located in the joint part between the uplift zone of Yilehuli volcanic rocks and Daxing＇anling volcanic rocks belt, Mo polymetallic anomalies with Mo anomalies being the dominant one, as well as Ag, Pb, Zn, Cu, Au, As, Sb, Bi anomalies associated have been detected. The anomalies distributed in area with obvious concentration focus, concentration zoning, and big concentration grads. Verified by soil survey, the anomalies represented well, and the Mo orebody has been detected through groove prospecting revealment. The orebodies occurred in rhyolite porphyry and crypto-breccia-rocks with the major mineral being molybdenite, as well as a few galenite, blende and chalcopyrite distributing in tiny veinlets and disseminating situation associated. The alteration types have included siliconization, sericitization, epidotization, Kaolinization and pyritization. The genesis of the deposit has been concluded as porphyry Mo polymetallic deposit with the prospecting perspective being optimistic.