Upper Permian Takatsuki Formation, Middle Triassic Shimamoto Formation and Triassic sedimentary complex in the Nishiyama area, Osaka and Kyoto prefectures, SW Japan

Sugamori, Yoshiaki

doi:10.5575/geosoc.112.390

Cited by 15 publications

(2 citation statements)

References 10 publications

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“…Recently, provided evidence for a Jurassic accretionary complex in NE China. Although Middle to Late Triassic accretionary complexes are recognized locally in the Kyoto area (Sugamori, 2006), major parts of these accretionary complexes were formed in the Middle to Late Jurassic time, when the intensity of volcanic activity was very high, as is shown by the detrital zircon concentration (Fig. 6).…”

Section: D Tectonics Between Stages 4 Andmentioning

confidence: 99%

Phanerozoic accretionary history of Japan and the western Pacific margin

Wakita

Nakagawa

Sakata³

et al. 2018

Geol. Mag.

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It is generally accepted that oceanic plate subduction has occurred along the eastern margin of Asia since about 500 Ma ago. Therefore, the Japanese Islands have a >500 Ma history of oceanic plate subduction in their geological records. In this paper, the accretionary history of the Japanese Islands is divided into six main stages based on the mode and nature of tectonic events and the temporal gaps in the development of accretionary processes. In the first stage, oceanic plate subduction and accretion started along the margin of Gondwana. After detachment of the North and South China blocks in Devonian time, accretionary complexes developed along island arcs offshore of the South and North China blocks. After the formation of back arc basins such as the Japan Sea, accretionary processes occurred only along the limited convergent margin, e.g. Nankai Trough. Detrital zircons of sandstones revealed the accretionary history of Japan. An evaluation of a comprehensive dataset on detrital zircon populations shows that the observed temporal gaps in the development of the Japanese accretionary complexes were closely related to the intensity of igneous activity in their provenance regions. Age distributions of detrital zircons in the accretionary complexes of Japan change before and after the Middle Triassic period, when the collision of the South and North China blocks occurred.

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Section: D Tectonics Between Stages 4 Andmentioning

confidence: 99%

Phanerozoic accretionary history of Japan and the western Pacific margin

Wakita

Nakagawa

Sakata³

et al. 2018

Geol. Mag.

View full text Add to dashboard Cite

show abstract

“…These complexes generally consist of oceanic plateau basalts and deep marine deposits, which were accreted and underplated underneath the Asian continental crusts during subduction [53,54,55]. Paleomagnetic analysis has revealed that the Japanese Islands were geologically connected to the Asian continent before the opening of the Japan Sea in Miocene epoch [6,56], and that the Jurassic accretionary complex in Southwest Japan was situated next to South Korea during its formation [25,29], which was initiated in, at the latest, the early Late Triassic period [57] and continued through the Jurassic period [52]. Adakitic granites, which are indicators of slab melting, intruded widely into the Korean continental crusts with an inlandward younging trend during the Jurassic period [5,8,18,58], supporting the interpretation of inlandward slab migration [47,48,59].…”

Section: Evidence Of Flat Slab Subduction In and Around Koreamentioning

confidence: 99%