Figure F11. Composition of amphiboles. A. (Na + K)A-site vs. AlIV (per formula unit). B. Mg# vs. AlIV. C. Ti vs. AlIV. The calculation procedures of the amphibole formula are given in the "Appendix," . The terminology of amphiboles is after Leake et al. (1997). Most of the analyses are plotted on the join between pargasite and tremolite. Note that the amphiboles from the high-temperature microscopic veins penetrating olivine grains are characteristically low in Ti content compared to those within clinopyroxene grains (C).

Figure F11. Composition of amphiboles. A. (Na + K)_A-site vs. Al^IV (per formula unit). B. Mg# vs. Al^IV. C. Ti vs. Al^IV. The calculation procedures of the amphibole formula are given in the "Appendix." The terminology of amphiboles is after Leake et al. (1997). Most of the analyses are plotted on the join between pargasite and tremolite. Note that the amphiboles from the high-temperature microscopic veins penetrating olivine grains are characteristically low in Ti content compared to those within clinopyroxene grains (C).