Small-scale Hf isotopic variability in the Peninsula pluton (South Africa) : the processes that control inheritance of source 176Hf/177Hf diversity in S-type granites
- F. Farina
- G. Stevens
- A. Gerdes
- D. Frei
DOIAbstract
The 176Hf/177Hf composition of inherited and magmatic zircon in the 538\ua0Ma S-type Peninsula pluton (South Africa) has been determined at different scales. In the smallest rock samples investigated (<0.5\ua0dm3), as well as within individual thin sections, magmatic zircon crystals exhibit the same wide range in \u3b5Hf(538) as the pluton (8\u3b5 units). In addition, across a significant range of bulk-rock compositions, both the range and average of the magmatic zircon Hf isotopic composition do not vary significantly with compositional parameters that are expected to scale with the proportion of mantle-derived magma addition (e.g., Mg# and Ca). At all scales, the \u3b5Hf variability in the magmatic zircon fraction matches well with that p...
Add to ORKG