勘查地球化学作为一种找矿手段在寻找硫化多金属矿床方面日臻完善，应用愈益广泛并取得了令人满意的效果。然而对于浸染型铌、钽花岗岩矿床的地球化学找矿论述较少。事实上，此类矿床Nb、Ta矿物的颗粒细小，肉眼无法看到，除直观的地球化学找矿标志外，岩石地球化学找矿法和重砂法（即矿物晕法）是寻找和评价这类矿床的重要手段。本文试图从这 Prospecting geochemistry, as a means of prospecting, is improving perpetually in search of sulphided polymetallic deposits and has been applied more and more widely and with satisfactory results. However, for disseminated niobium, less attention has been given to the geochemical prospecting of tantalum granite deposits. In fact, the mineral grains of Nb and Ta in these deposits are small and can not be seen by the naked eye. In addition to the visual indication of geochemical prospecting, the geochemical prospecting method and the heavy sand method (ie, mineral halo method) are to find and evaluate this An important means of deposit. This article attempts from this