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花崗偉晶岩脈的深部勘探工作是在地表勘探工作以后(参看“地質与勘探”1957年第20期)及在一定的評价基础(同上21期)上进行的。进行深部勘探工作前,必须对地表勘探工作所获得的地質资料进行反复的論証,明确勘探的目的,然后选定勘探手段。现將各阶段的工作分述如下。一、反复驗証地表勘探工作所获得的资料花崗偉晶岩脈变化是极不规則的。每个矿田,每条矿脈都有它一定的主要含矿带、次要含矿带及无矿带。必须详細观察并收集它們发育在矿脈的哪一部份以及它們在矿脈中发育的情况。例如,有些矿脈主要
The deep exploration of the granitic pegmatite veins was carried out after surface exploration (see “Geology and Exploration”, No. 20, 1957) and on a certain basis of assessment (No. 21 above). Before undertaking deep exploration work, geological data obtained from surface exploration work must be repeatedly demonstrated, the purpose of exploration must be clarified, and exploration means selected. Now the work of the various stages are as follows. First, repeated verification of surface exploration data obtained Granite pegmatite variation is extremely irregular. Each mine, each vein has its certain major ore belt, secondary ore belt and no ore belt. It is important to observe in detail and gather what part of the veins they are developing and how they develop in the veins. For example, some veins are major