Figure 6. Chemical composition of amphibole expressed by the Aliv vs. Alvi variation. Solid squares represent the chemical composition of amphibole in Zone III, open squares represent the chemical composition of amphibole in Zone IV, and solid circles represent the chemical composition of secondary amphibole in garnet-bearing rocks and also the chemical composition of amphibole in scapolite-bearing calc-silicate rocks. Circles with dots represent the chemical composition of tremolite (Tr), edenite (Ed), hornblende (Hbl), and pargasite (Prg) end-members (mineral abbreviations after Kretz, 1983).

Figure 6. Chemical composition of amphibole expressed by the Al^iv vs. Al^vi variation. Solid squares represent the chemical composition of amphibole in Zone III, open squares represent the chemical composition of amphibole in Zone IV, and solid circles represent the chemical composition of secondary amphibole in garnet-bearing rocks and also the chemical composition of amphibole in scapolite-bearing calc-silicate rocks. Circles with dots represent the chemical composition of tremolite (Tr), edenite (Ed), hornblende (Hbl), and pargasite (Prg) end-members (mineral abbreviations after Kretz, 1983).