From Binary Mixing to Magma Chamber Simulator

The interactions of magmas with their surroundings are important in the evolution igneous systems and crust. In this chapter, we conceptually distinguish assimilation from other modes magmatic interaction discuss a range geochemical models. We define its simplest form as an end-member mode which initial state ( t 0 ) that includes system melt solid wall rock evolves to later n where two entities have been homogenized. complex natural systems, can refer more broadly process mass magma wholly or partially homogenizes materials derived initially behaves solid. first models used binary mixing equations then evolved take account balance fractional crystallization. Most recent tools, such Magma Chamber Simulator, treat open thermodynamically order simulate changes crystallizing melting rock. Such thermodynamic considerations prerequisite for understanding consequences assimilation. signatures systems—although dominated some elements (particularly major elements) by crystallization processes—may be considerably influenced simultaneous partial melts compositionally distinct