摘要
在采矿山深边部资源勘查是矿山企业未来增储扩产的重要方向。针对在采矿山探明深度浅、增储勘查思路创新不足及技术方法手段单一等问题,以安徽庐枞盆地北部龙桥铁矿为研究对象,通过系统收集矿区地质、矿床成因及地球物理资料,构建了地质—地球物理综合找矿模型,明确了矿体与地质、地球物理场的耦合关系。基于该模型,开展了大比例尺重力、磁法和复电阻率法综合勘查,划分出4处具有找矿潜力的异常区。以已知钻孔数据和综合勘查揭示的矿区深部主要地质体密度结构、磁性体分布范围、低阻高极化异常蚀变带等为约束条件,以岩矿石物性为纽带,应用2.5D重磁联合反演技术,分析了矿山深部地质体的空间分布特征,识别出了潜在有利的成矿空间,为矿体深度预测及钻孔位置布设提供了依据。验证钻孔ZKT04-3、ZKT03-2揭露了多层铁铜多金属矿化蚀变,证实在采矿山采用重磁电综合物探勘查,可以精准圈定有利找矿靶区,服务于矿山企业增储,为今后在同类地区在采矿山开展深边部找矿工作提供了有效的技术手段,具有重要的现实意义。
Deep and peripheral resource exploration in operating mines is an important direction for future reserve in-crease and production expansion of mining enterprises.In response to the problems such as the shallow exploration depth,insuf-ficient innovation in reserve increase exploration thinking,and the singleness of technical methods and means in operating mines,taking the Longqiao Iron Mine in the northern part of the Lüzong Basin,Anhui Province as the research object,through the systematic collection of geological,ore genesis and geophysical data in the mining area,a comprehensive geological-geo-physical prospecting model was constructed,and the coupling relationship between orebodies and geological and geophysical fields was clarified.Based on this model,a large-scale gravity,magnetic and complex resistivity comprehensive exploration was carried out,and four anomaly areas with potential for mineral exploration were delineated.With the known borehole data and the density structure of the main geological bodies,the distribution range of magnetic bodies,and the low-resistance and high-polarization anomalous alteration zones revealed by the comprehensive exploration in the deep part of the mining area as con-straints,and taking the physical properties of rocks and ores as the link,the 2.5D gravity-magnetic joint inversion technology was applied to analyze the spatial distribution characteristics of geological bodies in the deep part of the mine,and potential fa-vorable ore-forming spaces were identified,providing a basis for predicting the depth of ore bodies and the layout of boreholes.The verification boreholes ZKT04-3 and ZKT03-2 revealed multiple layers of iron-copper polymetallic mineralization and altera-tion,confirming that the application of comprehensive geophysical exploration of gravity,magnetism and electricity in operating mines can accurately delineate favorable mineral exploration targets,serving the reserve increase of mining enterprises.This provides an effective technical means for the implementation of deep and peripheral mineral exploration in operating mines in similar regions in the future,and has important practical significance.
作者
陶龙
欧邦国
叶林
丁文祥
张莎莎
兰学毅
王阳阳
TAO Long;OU Bangguo;YE Lin;DING Wenxiang;ZHANG Shasha;LAN Xueyi;WANG Yangyang(Geological Exploration Technology Institute of Anhui Province(Energy Exploration Center,Bureau of Geology and Mineral Exploration of Anhui Province),Hefei 230031,China;Anhui Provincial Key Laboratory of Electrical Prospecting,Hefei 230031,China;Anhui Lujiang Longqiao Mining Co.,Ltd.,Hefei 231500,China)
出处
《金属矿山》
北大核心
2025年第7期223-232,共10页
Metal Mine
基金
国家自然科学基金项目(编号:42174087)。
关键词
深边部勘查
重力勘探
磁法勘探
电法勘探
龙桥铁矿
deep(peripheral)prospecting
gravity exploration
magnetic exploration
electrical exploration
Longqiao Iron Mine
