The second suite, ~2.08 Ga amphibolites, show signatures of back-arc basin magmatism, with geochemical evidence for partial melting of spinel-garnet lherzolite and metasomatism from slab-derived ...

Using mixing modelling of garnet lherzolite and spinel lherzolite mantle peridotite sources, we show that the AMS magmas are produced from a relatively deep source with 10–60% garnet lherzolite, ...