地质与勘探2025，Vol.61Issue(3)：475-486,12.DOI:10.12134/j.dzykt.2025.03.004
综合物探方法在蟒岭矿集区深部找矿中的应用
Application of Comprehensive Geophysical Prospecting Methods in Deep Exploration of the Mangling Ore Concentration Area
摘要
Abstract
The Mangling ore concentration area is a key area for molybdenum mineralization and deep exploration in the North Qinling tectonic belt.The formation of molybdenum polymetallic deposits is closely related to the Late Jurassic small acidic intrusions.Based on the study of the metallogenic model of molybdenum polymetallic deposits in the research area,this work attempts to determine the distribution and spatial morphology of concealed intrusions closely related to molybdenum mineralization,and to select favorable locations for deep mineralization.Three low gravity anomalies were delineated using 1∶50000 gravity measurement.It is comprehensively inferred that they were caused by the Taoguanping-Xigou semi-concealed intrusion,Laolongshan and Yaozhuang concealed intrsions,with areas of 6.7 km2,0.4 km2,and 1.8 km2,respectively.Detailed 1∶5000 gravity profile measurement was conducted to finely dissect the variations in the top surface of the concealed intrusions,revealing that the top surface depths are 200～1300 m,3000 m,and 500～1000 m,respectively.It is preferred to carry out IP intermediate gradient and IP sounding on the top of the Yaozhuang concealed intrusion to determine the distribution and deep morphology of the concealed ore body.Four plane IP anomalies and four cross-sectional IP anomalies were identified,which were inferred to be caused by the concealed ore body.These anomalies occurred at depths of 220 to 500 m,which provides further evidence for delineating favorable locations for molybdenum mineralization.Verified through drilling,concealed intrusion and concealed molybdenum ore bodies were discovered.The exploration results show that the geophysical methods combining 1∶50000 areal and 1∶5000 profile gravity and IP measurements have obtained promising effects in the deep exploration for magmatic hydrothermal molybdenum polymetallic deposits in the Mangling ore concentration area,which are effective for deep mineral exploration of similar deposits in the Qinling metallogenic belt.关键词
重力勘查/激电测量/隐伏岩体/深部找矿/钼矿/蟒岭矿集区Key words
gravity exploration/IP/concealed intrusion/deep exploration/molybdenum/Mangling ore concentration area分类
地质学引用本文复制引用
张晓团,李新林,周斌,高维强,江勇卫..综合物探方法在蟒岭矿集区深部找矿中的应用[J].地质与勘探,2025,61(3):475-486,12.基金项目
陕西省地质勘查基金项目(编号:61201908334)资助. （编号:61201908334）
