综合物化探方法在扎兰屯地区铅锌多金属矿找矿中的应用  

Application of comprehensive geophysical and geochemical prospecting methods in lead-zinc polymetallic ore prospecting in Zhalantun area

作　　者：房冬昱 FANG Dongyu(Research Institute of Nuclear Industry,Shenyang 110000,Liaoning,China)

机构地区：[1]核工业二四0研究所,辽宁沈阳110000

出　　处：《矿产勘查》2024年第S2期498-509,共12页Mineral Exploration

基　　金：中国核工业地质局地勘基金项目(201931)资助。

摘　　要：内蒙古扎兰屯地区属森林沼泽浅覆盖区,地表植被发育,找矿标志不明显,通过单一的地质、物探、化探工作,无法取得行之有效的找矿效果。为了在该地区实现找矿突破,本文通过开展1:5万地质草测、土壤化探扫面、1:1万地质、物化探检查和槽探验证等工作,在区内共圈定综合异常11处,认为区内大北沟地段AP08-乙2异常具有较好的成矿条件,异常元素组合以Ag、Cu、Mo、Pb为主,伴有Au、Zn、U元素的异常,异常主要产于上侏罗统满克头鄂博组与晚侏罗世二长花岗岩接触带部位,接触带的形态与高视极化率、低视电阻率有密切关系,指示了良好的成矿潜力。最后通过槽探的验证,取得了较好的找矿效果。The Zhalantun area in Inner Mongolia is an area with shallow forest and swamp coverage.The surface vegetation is developed and the ore prospecting signs are not obvious.It is impossible to achieve effective ore prospecting results through a single geological,geophysical and geochemical prospecting work.In order to achieve a breakthrough in prospecting in this area,a total of 11 comprehensive anomalies were delineated in the area by carrying out 1:50000 geological survey,soil geochemical survey scanning,1:10000 geological,geophysi-cal and geochemical inspection and trench verification.It is believed that the AP08-B2 anomaly in the Dabeigou section of the area has good mineralization conditions.The abnormal element combination is mainly Ag,Cu,Mo,and Pb,accompanied by anomalies of Au,Zn,and U elements.The anomalies are mainly produced in The contact zone between the upper Jurassic Manketou Obo Formation and the Late Jurassic monzogranite.The shape of the contact zone is closely related to high apparent polarizability and low apparent resistivity,indicating good mineralization potential.Finally,through the verification of trench exploration,good prospecting results were achieved.

关 键 词：扎兰屯地区 土壤地球化学 地球物理 浅覆盖区 铅锌多金属矿 

分 类 号：P631[天文地球—地质矿产勘探]