Extended Data Fig. 6: Petrological modelling results for Harcuvar Mountains migmatite sample TLAZ22-08.
From: Porphyry copper formation driven by water-fluxed crustal melting during flat-slab subduction
Equilibrium phase diagrams for sample TLAZ22-08 showing predicted assemblage fields and phase isopleths intersections in pressure–temperature–X(H2O) space. a) Phase diagram in pressure–temperature space with 7% mole H2O, showing phase boundaries and reaction topologies with all free water being consumed upon crossing the water saturated solidus. Observed peak assemblage in red text. b) Garnet isopleth compositions for pyrope and grossular, with polygons that overlay intersections that correspond to garnet core and outer rim. c) Isobaric Temperature–X(H2O) phase diagram at 0.75 GPa, varying bulk-rock H2O content from 0.25 wt% to 6 wt% with observed assemblage field in red text. d) Garnet pyrope and grossular compositional isopleths with polygons representing observed garnet core and outer rim compositions. e) K-feldspar and garnet volume isopleths with polygons showing intersections at observed volume proportions. f) Melt volume, plagioclase and sillimanite volume isopleths, with polygons showing the observed phase proportions and leucosome proportions.
