冀北地区低缓地球化学异常的找矿意义

冀北地区1:5万水系沉积物测量圈定的大量地球化学异常,大部分为低缓异常或单元素异常.在“高、大、全”异常区发现了丰宁银矿等一批大、中型矿床,同样在低缓异常区也发现了万全寺、茶棚等中小型矿床,证明有利的构造部位和火山-侵入活动区的低缓异常,也具有很好的找矿指示意义.

THE EXPLORATION SIGNIFICANCE OF WEAK AND GENTLE GEOCHEMICAL ANOMALIES IN NORTHERN HEBEI

Numerous geochemical anomalies delineated by 150 000 drainage sediment survey in northern Hebei are weak and gentle anomalies or single element anomalies. In the "high, large and comprehensive" anomaly areas,a bunch of large and medium size deposits such as the Fengning silver deposit have been discovered, and in the low anomaly areas,some medium and small size deposits such as the Wanquansi deposit and the Chapeng deposit have also been detected,which proves that low anomalies at favorable structure positions and volcanic intrusive areas also have good indicating significance.