灰色关联法在白银矿田矿床预测中的应用

An applycation of gray correlative filter method to ore deposit prognosis in Baiyin ore-field

根据灰色关联原理 ,对白银矿田及小外围与成矿关系密切的 1 5个地质、物探、化探综合找矿标志进行了关联度扫描 ,并在黑石山、白银厂和李家大沟地区获得了关联度异常。黑石山异常较好地反映了已知的火山穹隆 ;白银厂异常则与已知的小铁山、折腰山—火焰山、铜厂沟、拉牌沟、缸沟矿床 (点 )吻合 ;而李家大沟异常位于具有与前者相似成矿地质环境的预测区 ,预测其下部存在着隐伏火山穹隆和矿床。因此 ,利用老矿山已有的大量资料 ,选择合适的预测方法 ,在其深边部进行“二轮找矿”具有实际意义。

According to the gray system theory,15 signs including geology,geophysics and geochemistry closed to mineralzation have been correlatively scanned in the Baiyin ore-field and its nearby area,and three correlativity anomalies have been acquired in Heishishan, Baiyinchang and Lijiadagou areas. The Heishishan anomalies better reflect the known dome and the Baiyinchang anomalies are identical to Xiaotieshan,Zheyaoshan-Huoyanshan,Tongchanggou,Lapaigou,and Ganggou deposits (or mineralization spots), meanwhile, the Lijiadagou anomalies are situated in an unknown forecasting area where its mineralization background is similar to that of the formers. At last, the authors have predicted the hidden deposits and domes according to the acquired anomalies, and have drawn a conclusion that a suitable prognosis-method based on the plenty data of the old mine can attain valuable information of the second-round exploitation in the deep part and the sides of the mine.