Figure F3. AlVI vs. AlIV diagram for clinopyroxenes (the structural formula was calculated on the basis of six oxygens and four cations) of dolerites (Sites 1109 and 1118) and gabbros (Site 1117) from the Woodlark Basin. Clinopyroxenes from diabase (Sites 1109 and 1118) plot in the medium- to low-pressure field, whereas clinopyroxenes from gabbro (Site 1117) plot only in the low-pressure fields. The shaded area is gabbros and ferrogabbros from the Iberia Abyssal Plain and the Gorringe Bank of the Galicia margin in Portugal (data from Cornen et al. 1996). The cross-hatched area is clinopyroxenes from the Southwest Indian Ridge (data from Hébert et al., 1991; Stakes et al., 1991). Pressure (P) domains are from Aoki and Shiba (1973).

Figure F3. Al^VIvs. Al^IV diagram for clinopyroxenes (the structural formula was calculated on the basis of six oxygens and four cations) of dolerites (Sites 1109 and 1118) and gabbros (Site 1117) from the Woodlark Basin. Clinopyroxenes from diabase (Sites 1109 and 1118) plot in the medium- to low-pressure field, whereas clinopyroxenes from gabbro (Site 1117) plot only in the low-pressure fields. The shaded area is gabbros and ferrogabbros from the Iberia Abyssal Plain and the Gorringe Bank of the Galicia margin in Portugal (data from Cornen et al. 1996). The cross-hatched area is clinopyroxenes from the Southwest Indian Ridge (data from Hébert et al., 1991; Stakes et al., 1991). Pressure (P) domains are from Aoki and Shiba (1973).