综合物探技术在钟姑地区三维地质填图和成矿预测中的应用效果

RESULT OF APPLICATION OF INTEGRATED GEOPHYSICAL EXPLORATION TECHNIQUE TO 3D GEOLOGICAL MAPPING AND METALLOGENIC PROGNOSIS IN THE ZHONGGU AREA

钟姑地区位于长江中下游成矿带,具有优越的成矿地质条件。本文通过在测区开展面积性和剖面重磁电测量,以岩石物性为基础,用已有地质钻孔资料做约束,对物探数据进行处理和反演计算,推断13条控制性剖面-2000m以浅地质结构,结合界面反演等处理方法,获得了测区主要地层界面埋深数据,编制了各个深度的地质中断图;在此基础上进行典型矿区分析和总结,建立地质-物探成矿模式,在合理的定向分析及定量计算条件下,圈定找矿靶区。

Located in metallogenic zone along the mid-lower Yangtze River reaches, the Zhonggu area is superior in ore-forming geological conditions. This paper, through area and profile survey of gravity, magnetism and electricity in the mapped area, with physical properties of rocks as basis, and known geological borehole data as constraint, processed geophysical data, made an inversion calculation, inferred a geological structure above -2000m level within 13 controlling profiles, combined with interface inversion, acquired burial depth data of major stratigraphic interfaces in the mapped area, prepared geological interruption map of each depth, on such basis, analyzed and summarized typical ore districts, built up geological-geophysical ore-forming model, and outlined mineral exploration targets under reasonable orientation analysis and quantitative calculation.