内蒙古察右前旗李清地矿区铅锌银矿床探采新进展及成矿规律

New Progress of Exploration and Mining in Liqingdi Pb-Zn-Ag Deposit,Chayouqianqi,Inner Mongolia and its Metallogenic Regularites

近年来,内蒙古察右前旗李清地铅锌银矿床在采矿和深部探矿中取得了一系列新进展,矿床的资源储量规模进一步扩大,对矿体的空间分布特征及矿床成因的研究有了新的认识。本文在以往勘查和研究的基础上,对近几年在该矿床探采过程中的新发现进行系统研究,以矿田构造理论为指导探讨了矿床成因和找矿潜力。研究认为,该矿床矿体受复式背斜构造及其配套的北东和北西向断裂构造控制,矿床形成与深部隐伏岩体侵入关系密切,矿床成因为斑岩-热液型矿床,推断成矿时代为晚侏罗世-早白垩世。认为目前发现和开采的李清地铅锌银矿床为铅锌银钼斑岩-热液成矿系统的上部,外围和深部找矿潜力很大,尤其是深部勘查前景良好。

In recent years,a series of new progress has been made in mining and deep exploration of Liqingdi Pb-Zn-Ag deposit in Chayouqian,Inner Mongolia,and the resource reserves of this deposit have been further expanded.A new understanding has been reached on the spatial distribution characteristics of the orebody and deposit genesis.On the basis of the previous exploration and research,this work systematically researched the new discoveries during exploration and mining process,and discussed the deposit genesis and prospecting potential guided by the ore field structure theory.It is inferred that the orebodies are controlled by composite anticline and relevant NE-and NW-trending faults.The formation of ore orebodies is closely related to deep-concealed rock intrusion,and the deposit is of porphyry-hydrothermal genesis.The metallogenic age is inferred to be the Late Jurassic to Early Cretaceous.It is considered that the present discovered and exploited Liqingdi Pb-Zn-Ag deposit is the upper part of the Pb-Zn-Ag-Mo porphyry hydrothermal metallogenic system,and the periphery and deep of the deposit still have great prospecting potential,especially the deep exploration.