Meaning of geophase | Babel Free

Definitions

A point in the sequence of geochemical changes that occur as minerals are formed from cooling magma.

Examples

“[…] contemporaneous with gold are gilbertite, leptochlorite, tourmaline, iron⟳ sulphides, feldspar, (rare) carbonates, and quartz; post⟳ gold minerals are quartz, zinc and lead⟳ sulphides, and many others of geophases K and L.”

“In the opinion of A.E. Fersman, amazonite freely crystallizes from melt⟳ in the relatively late geophases of the pegmatite process⟳, but the beginning of its formation belongs to the earlier and high-temperature geophase—the rise⟳ of graphic granite.”

CEFR level