G. Sen

Anorthositeleucogaabro

GabbroPillow basaltDunite-wehrlitesills

OceanicCrust

Picriticmelt

Basalticmelt

Anorthositecumulate

Magma chamber

magmachamber

fluids

slab rollback

Forearcextension

Blue – anorthosites; gray – granitoids; green – ferrodiorites.

(Emslie et al. 1994)

(Longhi et al. 1999)

Genesis of AMCG Suite

Huppert & Sparks (1985)