MAGEMin is a function written in C which minimizes the Gibbs free energy of complex multiphase and multicomponent systems with a primary application on magmatic systems (rock/melt/fluid). The function receives bulk composition, pressure and temperature conditions and returns the phase equilibrium and chemical potential of system components. While MAGEMin is being developped with a strong emphasis on using the thermodynamic dataset for igneous systems of Holland et al. (2018, “from mantle to granite”) other database can be provided to the function.

Caribbean plate transfer The Earth’s seafloor is continuously being recycled at subduction zones. Oceans have a lifespan and a few million years after they form subduction zones initiate in their interiors. However, it is known that oceanic plates are difficult to break and bend down and unless an external force comes into play new subduction zones are difficult to form. It has been proposed that instead of starting new, subduction zones may propagate from dying oceans (Pacific-type) into pristine (Atlantic-type) oceans.