用岩石地球化学方法,对太古宙长英质火山岩进行矿产潜力评价,包括痕量元素(Zn、S、Cu)和主要元素(Mg、Na、K、Fe)。在加拿大地盾,应用的多种方法都包括对大量样品的分析,继之是用统计评价,把正常的火成分离结果与火山形成块状硫化物矿床过程中产生的化学变化区分开来。痕量元素例如Nb、Y、Zr、Cr和Ni以及稀土元素,比起前边对长英质火山岩进行经济评价,所使用的主要元素和痕量元素来说, The mineral potential of the Archaeozoic volcanic rocks of the Archean, including trace elements (Zn, S, Cu) and major elements (Mg, Na, K, Fe), was evaluated by lithogeochemical methods. At Shields Canada, many of the methods used include the analysis of a large number of samples followed by statistical evaluation to separate the normal results of the pyro-separation from the chemical changes that occur during the volcanogenic massive sulphide deposit. Trace elements such as Nb, Y, Zr, Cr and Ni as well as rare earth elements, compared with the previous economic evaluation of the long quartz volcanic rocks, the main elements and trace elements used,