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Spatiotemporal variations of Jurassic–Cretaceous magmatism in eastern A sia (Tan‐Lu Fault to SW J apan): evidence for flat‐slab subduction and slab rollback
Author(s) -
Kiminami Kazuo,
Imaoka Teruyoshi
Publication year - 2013
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/ter.12051
Subject(s) - geology , subduction , slab , magmatism , cretaceous , slab window , tectonics , trench , seismology , paleontology , oceanic crust , chemistry , organic chemistry , layer (electronics)
Here, we examine spatiotemporal variations of Jurassic–Cretaceous magmatism along a c . 1000‐km transect across eastern Asia, including SW J apan, the Korean, J iaodong and Liaodong peninsulas, and eastern J ilin Province. Integration of tectonic regime data with age data from igneous rocks in eastern A sia (from the Tan‐Lu Fault to SW J apan) suggests a shallowing of the subduction angle and subsequent flat‐slab subduction during the Jurassic, and slab rollback during the Early Cretaceous. The combination of a subducting plateau and root‐enhanced suction provides the best explanation for the flat‐slab subduction. In the final stage (Albian) of slab rollback, the geotectonic setting changed from subduction–accretion to a continental arc in the area close to the ancient trench (i.e. the Inner Zone of SW J apan).