基岩裸露区金矿异常源的快速追踪与评价

RAPID FOLLOW-UP AND APPRAISAL OF ANOMALY SOURCES OF GOLD DEPOSITS IN EXPOSED BEDROCK AREAS

在五台山古代、现代民采强烈污染区 ,水化学测量不仅能快速有效地圈定找矿靶区 ,而且可以排除人为污染。多子样组合“面型”岩石测量方法技术 ,与常规的点线式测量相比 ,不仅大大减少了样品采集和分析数量 ,大幅度降低了工作成本 ,而且更重要的是能快速有效地追踪区域化探异常源、评价区域化探异常找矿远景、圈定矿产详查找矿地段。试点测量结果表明 ,五台山地区矿化与燕山期中酸性杂岩体具有成因联系 ,其空间分布以杂岩体为中心具有Mo、Cu、Au -Cu、Pb、Zn -Au、Ag、Pb为主的多元素异常环带状分布模式 ;

In Wutai Mountain heavy pollution area formed by ancient and modern local mining, hydrochemical survey can not only delineate ore-prospecting target areas rapidly and effectively, but get rid of man-made pollution as well. Compared with routine point and line type survey, the 'planar' rock survey technique of multiple subsamples combination considerably reduces the number of samples required for analysis, and greatly cuts down the cost. What is more important is that this technique can trace sources of regional geochemical anomalies, evaluate prospects of regional geochemical anomalies, and delineate sectors for detailed investigation of ore resources. Tests show that in Wutai Mountain area there exists genetic connection between the Yanshanian intermediate-acid complex and mineralizations that spatially exhibit zonal distribution of multielement anomalies of Mo, Cu, Au-Cu, Pb, Zn-Au and Ag centering around the complex body. Such a distribution pattern correspondingly indicates porphyry mineralization—contact metasomatic mineralization—postmagmatic hydrothermal mineralization and their zonal distribution.