Figure F13. Quadrilateral components of pyroxenes. Fe2+ and Fe3+ are estimated from charge balancing the cations. All analyzed pyroxenes are shown. Tie-lines are shown between typical coexisting clinopyroxene and orthopyroxene (opx). Di = diopside, He = hedenbergite, En = enstatite, Fs = ferrosilite.Calculation of quadrilateral components is after Lindsley (1983). Experimental tie-lines between coexisting pyroxenes and isotherms are contoured at 100°C intervals between 700° and 1200°C after Lindsley (1983). The lithologic grouping is the same as those for previous figures.

Figure F13. Quadrilateral components of pyroxenes. Fe²⁺ and Fe³⁺ are estimated from charge balancing the cations. All analyzed pyroxenes are shown. Tie-lines are shown between typical coexisting clinopyroxene and orthopyroxene (opx). Di = diopside, He = hedenbergite, En = enstatite, Fs = ferrosilite.Calculation of quadrilateral components is after Lindsley (1983). Experimental tie-lines between coexisting pyroxenes and isotherms are contoured at 100°C intervals between 700° and 1200°C after Lindsley (1983). The lithologic grouping is the same as those for previous figures.