Figure 5
Schematic cartoon showing crust-mantle interaction and production of postcollisional mafic igneous rocks in continental collision zone.
(a) Reaction of the overlying SCLM wedge peridotite with felsic melts derived from the subducted continental crust during the Triassic continental collision in east-central China, generating the metasomes in orogenic lithospheric mantle domains overlying the continental subduction channel. (b) Partial melting of the fertile and enriched SCLM domains in the Early Cretaceous, giving rise to postcollisional mafic igneous rocks. Abbreviations of petrotectonic units: SCB = the South China Block, NCB = the North China Block, UHP = ultrahigh-pressure, SCLM = subcontinental lithopsheric mantle, OLM = orogenic lithospheric mantle.
