CSAMT 法在西涝口金矿勘查中的应用

摘要

In recent years,with the increasing of the depth of exploration,the traditional methods have not met the requirements of prospecting prediction.It is urgent to introduce new methods and technology.Xilaokou gold deposit is located in north margin of the Jiao-Lai basin,and has reached the large-scale now.For the five largest ore veins in mining area,only No.18 vein was systematically controlled by means of drilling engineering.And little of work has carried out for the other veins and its exploration and research level is relatively low.In order to predict deep orebody of this area, investigate ore-bearing properties of other ore veins and enlarge the scale of the deposit, CSAMT method is introduced.Through the analysis of CSAMT data,it provides the basis for drilling design.And the testing drilling results show that:the progress has been obtained in the deep prospecting of No.17 and 18 veins and confirmed that CSAMT method has a better application effect in Xilaokou gold prospecting,then,put forward the 18 vein and other veins as the focus of future prospecting work.Besides,the survey result shows a low resistively belt in the deep of No.17 and 18 veins.Combined with the regional geological background,we think that it is a larger shovel tectonic zone and has a better prospect for exploration.%　　近年来，随着勘查深度的加大，传统技术方法已不能满足深部找矿预测的需要，急需要引进新的技术方法和手段。西涝口金矿位于胶莱盆地北缘，目前已达到大型规模。区内规模较大的矿脉有5条，目前仅对其中的18号矿脉进行了系统的钻探工程控制，其他矿脉开展的工作较少，勘查程度和研究程度较低。为了对西涝口金矿深部进行找矿预测，进一步扩大矿床规模，了解其他矿脉的含矿性，引进了 CSAMT 法。通过分析 CSAMT 数据，为钻孔设计提供依据。钻探工程验证结果表明，在17号和18号脉深部金矿找矿取得进展，有力地佐证了 CSAMT 法在西涝口金矿找矿中具有很好的应用效果，并依此提出18号脉及其他矿脉今后找矿工作重点。测试结果显示18号与24号脉之间有一低阻带，结合区域地质构造背景，认为该区发育一条规模较大的铲式构造带，18号与24号脉之间具有较好的找矿前景。