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大厂矿田锡、多金属矿床的矿化活动,受隐伏花岗岩体及其上覆沉积岩系的岩性、构造等条件控制,其表现之一是与磁黄铁矿化有密切关系。因此,磁法勘探在大厂矿田的找矿勘探中,发挥了重要作用。已验证的磁异常,均与锡、多金属矿床或矿化有关。与异常有关的矿量,占探明总矿量的百分之七十左右。研究表明。陡产状脉状体与缓产状层状体组成的多级磁源迭加磁场,构成了利用磁法勘探寻找不同深度锡、多金属矿床或矿化的磁异常找矿模式。
The mineralization of tin and polymetallic deposits in Dachang orefield is controlled by the lithology and tectonics of the underlying granodiorite and its overlying sedimentary rocks. One of its manifestations is closely related to pyrrhotization. Therefore, magnetic prospecting plays an important role in prospecting exploration in Dachang orefield. Verified magnetic anomalies are related to tin, polymetallic deposits or mineralization. The anomalous amount of ore accounts for about 70% of the total proved amount of ore. research shows. Multi-stage magnetic field consisting of steep-grained veins and slow-yielding laminar magnetic field superimposed magnetic fields, forming a magnetic anomaly prospecting pattern for the exploration of tin, polymetallic deposits or mineralization at different depths by means of magnetic prospecting.