Abstract
Abstract Geochemcial distribution of tungsten in the granitic rocks of Afu Younger Granite Complex of Central Nigeria, indicates that the average tungsten content (168 ppm) of the rocks is significantly higher than any reported average abundance for granitic rocks. However, significant contrast between the rock phases is obtained only in the Igo biotite granite which is directly connected with tungsten lode mineralization. The close spatial relationship between tungsten mineralization and the Igo biotite granite suggests that the ore forming fluids were probably derived from the residual fraction of the granitic magma. Greisenization is intimately associated with mineralization and it is suggested that they both had a common process of formation.
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