内蒙古马鞍山沟钼多金属矿土壤地球化学异常特征及找矿标志

Geochemical anomaly characteristics and prospecting marks of Maanshangou molybdenum polymetallic deposit in Inner Mongolia

内蒙古马鞍山沟钼矿区位于大兴安岭成矿带北段,是一个与晚侏罗-早白垩世中酸性侵入岩有关的斑岩型钼矿床。矿体产出于花岗杂岩体中,杂岩体由中细粒二长花岗岩、黑云母花岗岩、花岗闪长岩、钾长花岗岩组成,地球化学特征反映出成矿元素与岩体关系密切,成矿元素的地球化学分带性明显,具有良好的钼多金属找矿前景。通过对马鞍山沟钼矿化探异常特征分析研究,探讨地球化学异常与矿体的关系,认为近似呈环状分布的Mo元素地球化学异常,是矿区最直接的找矿标志。

The Maanshangou molybdenum mining area in Inner Mongolia is located in the northern section of the Greater Hinggan Mountains metallogenic belt,It is a porphyry-type molybdenum deposit associated with acidic intrusive rocks in the late Jurassic-early Cretaceous.The ore body is occurred in the granite complex,which is composed of medium-fine granite,biotite granite,granodiorite and potassium granite,the geochemical characteristics reflect the close relationship between metallogenic elements and rock mass,the geochemical division of metallogenic elements is obvious,it has a good prospect for molybdenum and polymetallic prospecting.Through the analysis and study of the characteristics of the anomaly of molybdenum mineralization exploration in Maanshangou,the relationship between geochemical anomaly and ore body is discussed.It is considered that the geochemical anomaly of Mo element approximately in a circular distribution is the most direct prospecting mark in the mining area.