地物化方法在航磁异常查证中的应用

INTEGRATED APPLICATION OF GEOLOGICAL,GEOPHYSICAL AND GEOCHEMICAL METHODS IN AEROMAGNETIC ANOMALY VERIFICATION

航磁异常查证是矿产勘查中的一个重要环节,其目的是通过地面查证,确定异常是否存在,追踪异常源,了解异常源所处的地质环境,对异常作出客观评价,提出进一步工作的建议,为后续资料解释提供依据.通过使用地物化综合方法对黑C-2011-02243号异常查证发现:地质剖面测量和土壤地球化学测量可在地表发现较好的找矿线索;高精度磁测及激电中梯测量则反映了深部地质体及矿化特征.依据查证结果认为,在进行航磁异常查证工作时,可优先进行剖面性的地质、高精度磁法及土壤地球化学测量工作;在分析上述测量结果的基础上安排剖面性的电法测量;如存在进一步找矿信息,可安排面积性物化探测量及工程验证工作.

As an important part of mineral exploration, aeromagnetic anomaly verification aims to determine the existence of anomaly, trace anomaly source, investigate its geological environment, make objective evaluations, put fox-ward suggestions for further work, and provide basis for later data interpretation through ground check. The integrated application of geological, physical and chemical methods on the anomaly verification of H-C2011-02243 shows that the geological profile and soil geochemical surveys can find good prospecting clues on the surface, while the high-precision magnetic and induced polarization （IP） intermediate gradient surveys reveal the characteristics of deep geologic bodies and mineralization. It is thought that the geological, high-precision magnetic and soil geochemical surveys of profiles should be carried out first, then the IP surveys based on the above results, finally the geophysical-geochemical surveys and prospecting engineering once the favorable prospecting information is obtained.