Phase equilibria modelling of trace element evolution in arc magmas: implications for petrogenesis and copper porphyry indicators.

ABSTRACT: Trace element ratios in arc magmas are widely used to infer petrogenetic conditions, particularly those associated with porphyry-forming versus barren systems. However, quantitatively linking whole-rock signatures to pressure, water content, or redox conditions remains challenging, as trace elements are sensitive to mineral assemblage and compositions, which both evolve during fractional crystallisation. Here, we integrate a recently updated thermodynamic model suite appropriate for arc systems with dynamic (composition-, temperature-dependent) mineral-melt partitioning to track trace element evolution. Benchmarking the model against published experiments, including apatite saturation, shows that the methodology successfully reproduces phase assemblages and compositions. We simulate fracti

SUBMITTER: Soderman CR 

PROVIDER: S-EPMC12909399 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature