Abstract
Chemicomechanical interactions are discussed in terms of pressure, relative movements of phases in magmas, and magmatic differentiation. The effects of mechanical (non-volatile) pressure on the system albite-anorthite-diopside are calculated for certain conditions, and the conclusions are extended to more complex systems. The results indicate that pressure effects are small for pressure differences of several thousand atmospheres and that oscillatory zoning in plagioclase probably cannot be attributed to pressure changes. Crystallization in basic magmas typified by the Stillwater Complex is compared with that in batholiths of orogenic regions in terms of chemicomechanical effects, degree of attainment of equilibrium, and criteria for magmatism. A mode of pressure differentiation of possible importance under deep-seated earth conditions is proposed.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
