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Trace element characteristics of tourmaline in porphyry copper systems: development and application to discrimination;
Beckett-Brown, C E; McDonald, A M; McClenaghan, M B. The Canadian Journal of Mineralogy and Petrology vol. 61, 2023 p. 31-60,
https://doi.org/10.3749/2200037 (NRCan Cont.# 20220493)