内蒙古查干敖包锌铁多金属矿床地质特征及成矿模型

Geological characteristics and metallogenic model of Chaganaobao Fe-Zn polymetallic ore deposits in Inner Mongolia

经对该矿床地质特征详细研究分析,发现该矿床深部发育中侏罗世黑云二长花岗岩、钾长花岗岩,以岩体为中心形成以矽卡岩化为主,硅化、绿帘石化、碳酸岩、孔雀石化为辅的矿化蚀变特征。磁铁矿体、锌铁矿(闪锌矿-磁铁矿)体发育在矽卡岩中。矿床成因类型属锌铁伴生热液交代矽卡岩型矿床,成矿类型为层控内生型锌铁矿床。由此建立成矿模型,进一步研究该成矿带矿床成矿特征,指导周边找矿工作。

Based on the detailed analysis of the geological characteristics of the deposit,it was found that the middle Jurassic biotite adamelliteand moyite are developed in the deep part of the deposit.The alteration distribution from rock body to wallis skarn-high,silicification,carbonatizationand and malachite.Magnetite,zinc-iron(sphalerite-magnetite)body in the skarn.The genetic type of deposit is zinc-iron associated hydrothermal metasomatic skarn-type deposit, and the metallogenic type is strataboundendogenetic zinc-iron deposit.The metallogenic model is established to further study the metallogenic characteristics of the metallogenic belt and guide the surrounding exploration.