Timescales of disequilibrium melting in the crust: constraints from modelling the distribution of multiple trace elements and a case study from the Lesser Himalayan rocks of Sikkim

A numerical code has been developed to track the distribution of trace elements in crustal rocks undergoing melting. The model handles diffusion with moving boundaries and accounts for the processes of diffusion, dissolution and precipitation in a partially molten system. Among the various input parameters for modelling, source composition (i.e. modal abundance) variations, diffusion coefficients and partition coefficients are found to exert a...