Abstract
Geochemical classification of 284 granitic rocks from the Tasman Geosyncline, eastern Australia, demonstrates the association of tin deposits with leucocratic granites of high tin content. The mean Sn content (26 ppm) in such rocks is about seven times higher than in “barren” granites. Factor analysis of geochemical data indicates differences in the geochemical evolution of various rock types and the relative importance of magmatic differentiation and postmagmatic alteration in determining the composition of rocks in various areas of the geosyncline.
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