Permian–Triassic back-arc basin development in response to Paleo-Tethys subduction, Sa Kaeo–Chanthaburi area in Southeastern Thailand

Hara, Hidetoshi; Tokiwa, Tetsuya; Kurihara, Toshiyuki; Charoentitirat, Thasinee; Ngamnithiporn, Auranan; Visetnat, Krai; Tominaga, Kohei; Kamata, Yoshihito; Ueno, Katsumi

doi:10.1016/j.gr.2018.06.007

Cited by 30 publications

(25 citation statements)

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“…4d). In contrast, sandstones of the Pong Nam Ron Formation in the Sa Kaeo Backarc Basin display the signature of a basalt-dominant provenance (Hara et al 2018;Fig. 4c, d).…”

Section: E Back-arc Basin Sedimentsmentioning

confidence: 98%

“…The Indochina Block has remained within the palaeo-equatorial region since it broke away from Gondwana during the Early Devonian (Metcalfe, 2002(Metcalfe, , 2006. The Sukhothai Arc is considered to represent an island arc with a forearc basin and a back-arc basin that formed by subduction of Palaeo-Tethys oceanic crust (Ueno & Hisada, 2001;Sone & Metcalfe, 2008;Hara et al 2017Hara et al , 2018. The Inthanon Zone is interpreted to represent nappes of Palaeo-Tethyan rocks thrust westward over a marginal part of the Sibumasu Block (Barr & Macdonald, 1991;Caridroit et al 1992;Ueno & Hisada, 2001;Hara et al 2009).…”

Section: Geological Outline Of Triassic Sediments In the Palaeo-tethys Convergence Zonementioning

confidence: 99%

“…We use the La-Th-Sc ternary diagram of Bhatia & Crook (1986) and the V-Cr-Th*10 ternary diagram of Hara et al (2018) for understanding the provenance and tectonic setting of the studied sandstones, employing Th as a typical incompatible element, Sc, V and Cr as compatible elements, and La as a light REE. In addition, trends from mafic to felsic volcanic and igneous rocks were estimated from the mean values of geochemical data for basalts from the Sa Kaeo Back-arc Basin (Hara et al 2018), basalt-andesite and felsic volcanic rocks from the Sukhothai Arc (Srichan et al 2009), and Phanerozoic granitic rocks (Condie, 1993). New geochemical data generated during this study are listed in Table S1 (in the Supplementary Material available online at https://doi.org/10.1017/S0016756820001028).…”

Section: Sandstone Petrography and Geochemistrymentioning

confidence: 99%

“…In addition, the convergence zone contains an accretionary complex that records oceanic plate stratigraphy and mélange formation (Hara et al 2009). An island arc system in the convergence zone reached its peak during the Early to early Late Triassic, and became inactive owing to closure of the Nan and Sa Kaeo back-arc basins and collision of the Sukhothai Arc -Indochina Block with the Sibumasu Block (Sone & Metcalfe, 2008;Hara et al 2018). This sequence of events marked a change in tectonic setting from accretion to collision tectonics associated with continental growth during the Triassic.…”

Section: Introductionmentioning

confidence: 99%

“…In the present study, we use detrital zircon U-Pb ages to investigate island arc development in the Palaeo-Tethys convergence zone during the Triassic. We have previously reported detrital zircon U-Pb ages from Triassic sediments of the accretionary complex in the Inthanon Zone (Hara et al 2013), the forearc basin in the Sukhothai Arc (Hara et al 2017), and the Sa Kaeo Back-arc Basin (Hara et al 2018) in the Palaeo-Tethys convergence zone in Thailand. Here, we present new detrital U-Pb ages for Triassic sediments from the Indochina Block (Huai Hin Lat and Nam Phong formations), the Sibumasu Block (Mae Sariang Group) and the Nan Back-arc Basin (Pha Som Metamorphic Complex and associated formations).…”

Section: Introductionmentioning

confidence: 99%

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Revisiting the tectonic evolution of the Triassic Palaeo-Tethys convergence zone in northern Thailand inferred from detrital zircon U–Pb ages

et al. 2020

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Detrital zircon U–Pb ages for sediments in and around the Palaeo-Tethyan convergence zone in northern Thailand provide constraints for tectonic interpretations of the Indochina Block, the Sibumasu Block, the Inthanon Zone accretionary complex and the Nan Back-arc Basin during the Triassic. In sedimentary rocks of the Indochina Block, almost all of the Palaeozoic and Triassic zircons were sourced from the collision zone between the Indochina and South China blocks, and an active continental margin in the western Indochina Block. Sediments of the Sibumasu Block were supplied by erosion of Archaean basement and from the Grenville and the Pan African orogenies, but show no record of Permian to Triassic igneous activity. Accretionary complex sediments have provenances of both the Sukhothai Arc and the Indochina and South China blocks, with detrital zircons of various ages being supplied from crustal uplift and erosion related to the Indosinian I orogeny. Sedimentary rocks of the Nan Back-arc Basin are widely distributed not only in the Nan–Uttaradit but also in northern Sukhothai areas. The origin of the Pha Som Metamorphic Complex and associated formations can be traced to basin-filling sediments in the Nan Back-arc Basin. These detrital zircon U–Pb ages have also allowed identification of the changing tectonic setting in the Palaeo-Tethys convergence zone from the ‘erosion of Proterozoic continental basement’ to ‘Palaeozoic active continental margin in the western Indochina Block’ and ‘Palaeozoic, Permian to Triassic collision zone between the South China and Indochina blocks’ through to ‘Triassic active Sukhothai Arc’.

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“…4d). In contrast, sandstones of the Pong Nam Ron Formation in the Sa Kaeo Backarc Basin display the signature of a basalt-dominant provenance (Hara et al 2018;Fig. 4c, d).…”

Section: E Back-arc Basin Sedimentsmentioning

confidence: 98%