A recently introduced plate reconstruction model refutes the migration of the Izanagi-Pacific ridge formerly considered to be responsible for the adakitic arc magmatism in East Asia during the Cretaceous. This chapter suggests that northeast-to-southwest migration of the East Asian continental blocks during the Cretaceous resulted in apparent southwest-to-northeast migration of an intracontinental mantle plume from eastern China to Far East Russia. The apparent migration of the mantle plume explains the southwest-to-northeast migration of intracontinental adakitic rocks and A-type granitoids formed by partial melting of delaminated thickened lower mafic crust and decompression melting of the mantle plume, respectively, and the simultaneous migration of adakitic arc magmatism generated by a hot lobe of the mantle plume injected into the mantle wedge, producing partial melting of subducted oceanic crust.
|Title of host publication||Subduction Dynamics|
|Subtitle of host publication||From Mantle Flow to Mega Disasters|
|Number of pages||11|
|Publication status||Published - 2015 Sep 26|
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All Science Journal Classification (ASJC) codes
- Earth and Planetary Sciences(all)