Abstract
Experimental studies and interpretations of mineralogical-petrological equilibria involve close interaction with related fields. A quantitative approach to mineralogy requires exacting control of the compositions and external parameters in experimental work and refinement of methods of interpolating and extrapolating data to temperature and pressure regions not readily available for direct experimental observations. Success in these efforts is dependent on more detailed information on the thermodynamic properties of individual phases and improved understanding of the laws governing such relations.
Examples largely from the author’s own work are used to illustrate existing or emerging interdisciplinary approaches being brought to bear on mineralogical-petrological problems. Because of relatively extensive information available on thermodynamic properties of many alloy systems at high temperatures and because of the generally very low mutual solubilities between metal and oxide phases, the study of metal-oxide-gas equilibria constitutes a particularly good starting point for determining activities of components in oxide solutions. With the latter as a base, it is shown how one may proceed in successive steps into the more complex silicate systems. It is also inferred that the role of research on mineral equilibria is taking on new dimensions in the applied areas. Existing or future shortages of energy and high-grade raw materials dictate more innovative use and modification of available resources. Solution of such problems requires extensive cooperation and cross-fertilization among several disciplines. Mineralogists-petrologists are in a position to play a key role and should move vigorously in these areas.
