内蒙古小东沟钼矿成矿地质条件分析

GEOLOGICAL CONDITIONS OF XIAODONGGOU MOLYBDENUM DEPOSIT

小东沟钼矿为中型斑岩型钼矿,矿区及其外围已发现多个钼或钼多金属矿点。文章根据小东沟钼矿的赋矿地质条件和物化探异常特征,阐述了该矿床钼矿的成矿地质条件,及钼矿与外围铅锌矿之间成因上的联系,提出本区钼矿的成矿母岩为边墙岩体,矿化富集部位为小岩株前缘的周边及顶部,铅锌矿矿质来源主要为于家北沟组地层,其成矿与后期岩浆热液活动关系密切。同时,由物探成果和钻探资料推测在边墙岩体周边还存在有类似小东沟岩体的隐伏含矿小岩体,为该区今后的工作提出了新的找矿思路。

Xiaodonggou deposit is a medium porphyry Mo deposit. Some Mo polymetallie deposits are found in the mine and nearby. Based on ore - forming geological conditions, geochemical and geophysical anomaly in the deposit, it is suggested that the are - forming materials came from Bianqiang rock mass, and Mo mineralization has genetic relations with Pb -Zn ores in the outside. Mo ores are enriched in the periphery and top of the rock mass. Pb and Zn came from strata of Yujiabeigou formation, and are related with late magmatie fluids. According to results of geophysical exploration and drilling data, it is predicted that there exists blind small ore - bearing rock mass similar to Xiaodonggou mass in the periphery of Bianqiang rock mass. These can provide a new clue for further ore - finding.