【摘要】 蟒岭矿集区是北秦岭构造带开展钼成矿作用和深部找矿重点地区，区内钼多金属矿床的形成与晚侏罗世酸性小岩体关系密切。文章在研究区钼多金属矿成矿模式研究基础上，为确定与钼成矿作用密切相关的隐伏岩体的分布范围和空间形态，优选深部成矿有利部位，采用1∶5万重力测量圈定了3个重力低值异常，综合推断由桃官坪-西沟半隐伏岩体和老龙山、腰庄隐伏岩体引起，其面积分别为6.7 km~2、0.4 km~2、1.8 km~2；利用1∶5千重力剖面测量对各隐伏岩体顶面变化趋势进行精细解剖，揭示其顶面埋深分别为200～1300 m、3000 m、500～1000 m；优选在腰庄隐伏岩体顶上带开展激电中梯测量和激电测深确定隐伏矿体分布范围和深部形态，共圈出4个平面视极化率异常和4处断面极化率异常，推断由隐伏高极化矿体引起，其埋深介于220～500 m，进一步圈定了钼成矿有利部位；最终经钻探验证，发现了隐伏岩体和隐伏矿体。勘查成果表明：1∶5万面积性、1∶5千剖面重力与激电测量相结合的物探方法在蟒岭矿集区岩浆热液型钼多金属矿深部找矿实践中取得良好效果，是秦岭成矿带同类型矿床深部找矿有效的勘查技术方法组合。更多还原

【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 km~2, 0.4 km~2, and 1.8 km~2, 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∶5000profile 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.更多还原