Extended Data Fig. 6: Selected Harker diagrams showing the composition of bulk rocks, melt inclusions, minerals and modelled EL and PL.
From: Earth’s earliest granitoids are crystal-rich magma reservoirs tapped by silicic eruptions
The composition of the trondhjemites is consistent with a mixture of plagioclase-rich solids and residual granitic melt represented by the melt inclusions, both formed out of an evolved liquid (EL). The composition of the diorites and tonalites are consistent with amphibole + plagioclase cumulates, formed out of a parental liquid (PL) of tonalitic composition. In Harker plots for major oxides, we report the average composition of greenstone xenoliths26,27 and a compositional trend of hybridization between the latter and the trondhjemites (arrows), showing that it does not satisfactorily reproduce the chemistry of the diorites and tonalites. In Harker plots for trace elements, the trends towards biotite and garnet were determined using the average composition of these phases for the element of interest. The fields for the modelled composition of EL and PL corresponds to 95% of the data obtained by stochastic calculations (point density increases with color darkness). The stars represent the average modelled compositions of EL and PL.
