Oxy-amphibole equilibria in Ti-bearing calcic amphiboles: Experimental investigation and petrologic implications for mantle-derived amphiboles by R.K. Popp, H.A. Hibbert, W.M. and Lamb (vol. 91, no. 1, p. 54–66, DOI: 10.2138/am.2006.1838)

The composition of the Vulcan’s Throne sample expressed as atoms per formula unit (apfu) reported in Table 1 was taken directly from Table 2 in Popp et al. (1995), which contains an error. The actual 2.70 Al apfu was mistakenly reported as 2.07 apfu.


Use of the correct Al-content reduces the correlation coefficient of the regression of (Ti + Altotal) vs. log Kx to...

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