蒙古苏赫巴托尔省前巴音钼矿地质特征及找矿前景

Geological characteristics of Qianbayin molybdenum deposit and prospecting potential,Erdenetsagaan soum,Sukhbaatar aimag,Mongolia

蒙古额尔敦查干县前巴音钼矿床属奴库特达班—哈拉哈河钨钼成矿系列,是一新发现的石英脉型钼矿床,目前控制规模为中型。矿体的赋矿围岩主要为次生云英岩和云英岩化的中粗粒二长花岗岩,以及矿化蚀变的似斑状二长花岗岩等,矿化产于北东—南西向的断裂、裂隙带及其不同方向的次生裂隙中,主要受构造控制。辉钼矿主要呈脉状、细脉状产出,少量为浸染状。围岩蚀变有硅化、黄铁矿化、云英岩化、次生石英岩化、绢云母化、绿帘石化和绿泥石化等,以前3种为主。文章结合矿床地质特征,综合该区成矿规律,认为该矿区深部及外围找矿前景较好,经进一步勘查,规模有望达到大型。

The Qianbayin Mo deposit located in the Erdenetsagaan soum, Sukhbaatar aimag, southeastern Mongolia, is a newly discovered quartz vein type Mo deposit, currently explored as medium - sized scale. It belongs to the Nukutdabaan - Halha Gol W - Mo mineralization belt. The mo - bearing quartz veins are hosted in the greisen and greisenized medium - coarse grained monzonite and altered monzogranite porphyry, and controlled by NE -trending faults and fracture z^nesas well as various directions of fissure zones. Molybdenite occurs as veins, veinlets with minor disseminated grains. The main wall - rock alterations include silicification, pyritization, and greisenization, minors are quartzite, sericitization, epidotization, and chloritization etc. Based on the study of ore deposit geology and metallogenetie regulations, it is predicted that there is a great potential for discovering the large - sized deposit in future ex- ploration programme in the depth and peripheral areas.