蚌埠隆起航磁构造特征和进一步找矿方向

Aeromegnetic characteristics in Bengbu uplift and the prospecting on iron dposits direction

蚌埠地区西贾庄铁金矿的发现,说明深部找矿也有广阔前景。利用1∶2. 5万航磁测量,获取区内基底、主干断裂信息;结合重力场信息,总结出磁力和重力高背景下的"双低"地段是酸性隐伏岩体的信息;磁异常对已知矿床反映明显,负背景场中的突出磁异常和剩余重力异常梯度带复合部位是成矿有利地区,异常带边部局部异常和鼻状突出部位是有利成矿地段。依据磁场信息和重力场信息,综合分析认为怀远—马头城一带、刘府—凤阳、刘府镇—大庙三地新发现磁异常,其找矿潜力很大,旧城—西阳集和万福—河溜镇两处覆盖区磁异常也是值得找矿地段,由此划分找矿远景区。所获取成果对进一步找矿具有指导意义。

The discovery of Xi Jia Zhuang iron-gold deposit in Bengbu shows that prospecting in deep has broad prospects.The1 ∶ 25000 high-precision aeromagnetic survey obtained the basic magnetic field information,including the basement characteristcis,main fractures of deposits.The magnetic anomalies have a close relationship to deposit.The study of magnetic field and gravity field proves that＂double low＂area under the high magnetic field and gravity background indicated the concealed acid rock mass related with metal deposits.The overlap region of anomalies in the negative background field and the residual gravity anomaly gradient belt is mineralization favorable areas,and the nose shaped out burst area in the abnormal zone is favorable metallogenic sites.According to the information of magnetic anomalies and gravity,comprehensive research finds that the new discovered magnetic anomalies in Huaiyuan-Matoucheng,Liu Fu-Fengyang and Liu Fu Zhen-Damiao three areas still have further prospecting potential.The magnetic anomalies in the coverage area of Jiuji-Xiyangji and Wanfu-He Liu Zhen are also prospecting area.The results have significance for guiding further prospecting.