Mesozoic episodic magmatism in South Korea and its tectonic implication

Hee Sagong, Sung Tack Kwon, Jin-Han Lee

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

NE trending granitoid batholiths in South Korea are part of the huge Phanerozoic granitoid belt in east Asia. The crystallization ages of granitoid plutons show three episodes of Mesozoic magmatism in South Korea: Triassic (248-210 Ma), Jurassic (197-158 Ma), and Late Cretaceous - early Tertiary (110-50 Ma), with a Late Jurassic-Early Cretaceous (∼50 m.y.) hiatus. The granitoid ages and kinematic analyses of the Mesozoic structures in South Korea suggest that the Middle Jurassic (180-170 Ma) dextral strike-slip ductile shear zones formed by the northwest (orthogonal) subduction of the Izanagi plate, whereas the Cretaceous sinistral faults formed by the northward (oblique) subduction of the same plate, which generally agree with proposed reconstruction of plate motions, albeit uncertain, around east Asia. Among the models proposed to explain magmatic lull in a continental arc, shallow angle subduction associated with high convergence rate and subduction of oceanic plateaus might be the probable cause for the magmatic hiatus in South Korea and Japan. The huge width (∼500 km) of the east Asian granitoid belt may be explained by oceanward retreat of subduction zone in the Cretaceous in association with change in the movement direction of the subducting plate.

Original languageEnglish
Article numberTC5002
Pages (from-to)1-18
Number of pages18
JournalTectonics
Volume24
Issue number5
DOIs
Publication statusPublished - 2005 Oct 1

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South Korea
Tectonics
granitoid
magmatism
tectonics
subduction
Cretaceous
Crystallization
Jurassic
hiatus
Kinematics
batholiths
continental arc
plate motion
Phanerozoic
subduction zone
pluton
shear zone
plateaus
Japan

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Mesozoic episodic magmatism in South Korea and its tectonic implication. / Sagong, Hee; Kwon, Sung Tack; Lee, Jin-Han.

In: Tectonics, Vol. 24, No. 5, TC5002, 01.10.2005, p. 1-18.

Research output: Contribution to journalArticle

Sagong, Hee ; Kwon, Sung Tack ; Lee, Jin-Han. / Mesozoic episodic magmatism in South Korea and its tectonic implication. In: Tectonics. 2005 ; Vol. 24, No. 5. pp. 1-18.
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