S3: Tectonics of East Asia (Special Session)

[S3-05] Age variation of granitoids of Tsuwano Complex, SW Japan

*Kosuke Kimura¹, Yasutaka Hayasaka², Tomoyuki Shibata², Kaushik Das², Kenta Kawaguchi³ (1. KOSEN, Kure College, 2. Hiroshima Univ. Sci., 3. Jeonbuk Nat. Univ.)

Keywords:Maizuru Terrane, Tsuwano Complex, Zircon U-Pb age

New zircon U-Pb ages of VAG-type granitoids from Totanigawa body, Tsuwano Complex of Maizuru Terrane, SW Japan reveal 1) 1842 Ma, 2) 771 Ma, 3–4) 479 Ma (Th/U<0.1) oscillatory mantle-rim with 915–845 Ma and 815–755 Ma inherited core, and 5) 490–400 Ma of age data. Moreover, 1760 Ma of age was yielded from A-type granitoid of Busaka body. Both Neoproterozoic ages and 1.8–1.75 Ga A-type granite are reported from the southern margin of North China Craton.