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An overview of adakite, tonalite–trondhjemite–granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution  (2005)

by  H. Martin et al.

Slightly before these works on adakite, studies on Archaean sodic rocks of tonalite, trondhjemite, and granodiorite composition had already suggested a connection between sodic, felsic magmatism, and melting of basaltic crust at pressures high enough to stabilise garnet (eclogite- or garnet-bearing amphibolite.