Abstract

Petrochemical investigation of the Cape Granite Suite illustrated that three major granitoid types exist namely S-, I-and A-types. Studies of zircon typologies of these granites confirmed that the three major types and their subtypes could be distinguished with relative ease. Using the typological classification as a base, zircons from the three granite groups were analysed by proton microprobe. The proton microprobe was utilized to enable the detection of elements normally present in low quantities in zircon. The results clearly illustrated that PIXE analyses may readily be used to discriminate zircons from S-, I- and A-type granites using the elements Th, Y and Yb.

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