Triassic 40Ar/39Ar ages from the Sakaigawa unit, Kii Peninsula, Japan: implications for possible merger of the Central Asian Orogenic Belt with large-scale tectonic systems of the East Asian margin

Tectonometamorphic evolution of the Permo-Triassic Songrim (Indosinian) orogeny: evidence from the late Paleozoic Pyeongan Supergroup in the northeastern Taebaeksan Basin, South Korea

“…However, Late Paleozoic magmatic events (340-320 Ma;Arakawa 1984;Arakawa et al 2000) have been reported in the Hida-Oki belt, southwestern Japan. The Hida-Oki belt is composed mainly of paragneisses suffering amphibolite-to locally granulite-facies metamorphism of 250-225 Ma (Suzuki and Adachi 1994;Arakawa et al 2000;Kawano et al 2006;Tsutsumi et al 2006;de Jong et al 2009). This belt is often correlated to the collision of the North and South China blocks (Maruyama et al 1997;Oh 2006) and/or the eastern Eurasian margin (de Jong et al 2009).…”

“…d Magnified photomicrograph (PPL) of box d in a displays that the prismatic sillimanite aligned to the sub-horizontal S 4 foliation. Single barbed arrow and number represent orientation of strike and way up of each thin section the detrital materials probably derived from both the North and South China blocks (e.g., Sano et al 2000;Tsutsumi et al 2006), although our data are lacking in the range of 750-650 Ma zircon signature of the Neoproterozoic rifting that is widespread in the South China block (Chough et al 2000;Hacker et al 2004;Fitches and Zhu 2006;de Jong et al 2009 and reference therein).…”

“…10; Chough et al 2000;Ree et al 2001;Han et al 2006). The Songrim (Indosinian) orogeny is often regarded as the eastward continuation of the ultra-high pressure metamorphism in the Qinling-Dabie-Sulu suture zone, passing via the Imjingang belt (Ree et al 1996;Cho et al 2007; Kwon et al 2009) and/or the northern and southern Gyeonggi massif (Oh 2006;Oh et al 2009) in south Korea, although these tectonic scenarios are still controversial (Yin and Nie 1993;Ree et al 2001;Cho and Kim 2005;Han et al 2006;de Jong et al 2009). Also, the Late Permian to Early Triassic tectonic events are not only limited to the collision between the North and South China blocks, but also affect the collision of the eastern Eurasia landmass (Yin and Nie 1993;Cho and Kim 2005;de Jong et al 2009;Kim and Ree 2010).…”

“…The Songrim (Indosinian) orogeny is often regarded as the eastward continuation of the ultra-high pressure metamorphism in the Qinling-Dabie-Sulu suture zone, passing via the Imjingang belt (Ree et al 1996;Cho et al 2007; Kwon et al 2009) and/or the northern and southern Gyeonggi massif (Oh 2006;Oh et al 2009) in south Korea, although these tectonic scenarios are still controversial (Yin and Nie 1993;Ree et al 2001;Cho and Kim 2005;Han et al 2006;de Jong et al 2009). Also, the Late Permian to Early Triassic tectonic events are not only limited to the collision between the North and South China blocks, but also affect the collision of the eastern Eurasia landmass (Yin and Nie 1993;Cho and Kim 2005;de Jong et al 2009;Kim and Ree 2010). Following the Songrim collisional orogeny, the Korean Peninsula was under a continental arc setting, with the subduction of the Izanagi plate from the Early Jurassic (Maruyama et al 1997;Sagong et al 2005;Han et al 2006) and suffered the Middle Jurassic to Early Cretaceous Daebo tectonic event in the continental magmatic arc setting (Han et al 2006;Kim and Ree 2010).…”

Implications of subduction and subduction zone migration of the Paleo-Pacific Plate beneath eastern North China, based on distribution, geochronology, and geochemistry of Late Mesozoic volcanic rocks

“…10a) where abundant arc-related plutonic and volcanic igneous rocks were generated (Pouclet et al 1994;Kutsukake 2002). It is worth pointing out that this Cretaceous subduction event must have been independent of the Triassic-Jurassic subduction along the East Asian margin (de Jong et al 2009;Park et al 2009) and could have been followed by Kula/ Pacific ridge subduction in the Late Cretaceous (Kinoshita 2002).…”