Understanding Sibumasu in the context of ribbon continents

Morley, Christopher

doi:10.1016/j.gr.2018.07.006

Cited by 42 publications

(16 citation statements)

References 141 publications

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“…Different models have been proposed to explain the distribution of this volcanic belt. The western margin can be explained by eastward subduction of a branch of the Paleo-Tethys under the Indochina composite terrane (Morley, 2018) or associated back-arc basin development (Qian et al, 2016;Rossignol et al, 2016). In NW Laos, the magmatism was attributed to the subduction under the Viet-Lao terrane of oceanic crust attached to the Sino-Vietnam composite terrane (Kamvong et al, 2014), possibly referring to the Song Ma oceanic crust.…”

Section: Early Carboniferous (Visean)-middle Permian Evolutionmentioning

confidence: 99%

Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data

Tran

Faure

Nguyen

et al. 2020

Journal of Asian Earth Sciences

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Section: Early Carboniferous (Visean)-middle Permian Evolutionmentioning

confidence: 99%

Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data

Tran

Faure

Nguyen

et al. 2020

Journal of Asian Earth Sciences

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“…2D seismic sections (Line A-Line D) are interpreted in this study. Morley, 2018). The pre-existing Permian slope-to-basin rocks were extensively folded, thrust, inverted, uplifted, and eroded forming the N-S trending Phetchabun Fold Belt (Sone and Metcalfe, 2008).…”

Section: Pre-cenozoic Tectonic Historymentioning

confidence: 99%

2D Sequential Restoration and Basin Evolution of the Wichianburi Sub-basin, Phetchabun Basin, Central Thailand

Jitmahantakul

Phetheet²,

Kanjanapayont

2020

Front. Earth Sci.

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The Wichianburi Sub-basin is currently the only productive area in the southern part of the Phetchabun Basin, central Thailand. It is structurally dominated by NNW-SSE to NNE-SSW trending normal faults as a result of multistage rifting since the Late Oligocene. Half-graben and full-graben basin geometries can be observed from 2D regional seismic sections. In this study, structural restoration techniques were applied to validate the structural interpretation of the original hardcopy of the 2D seismic sections. Stratigraphic information is compiled from published papers and well reports. Our results revealed that most of the deformation was concentrated during the Late Oligocene. Main depocenters for the syn-rift sediments focused in the basin center along the west-dipping normal faults. These faults cut the prerift section and their orientations were possibly controlled by the Permo-Triassic fabrics that underlie the Phetchabun Basin. By measuring the length of the profiles before and after faulting, the restorations show that the extensions of the Wichianburi Subbasin decrease from 12.30% during the main rift phase (Late Oligocene to Early Miocene) to 2.53% during the second phase of rifting. Rifting only focused in the basin center with the development of NNW-SSE to N-S trending intrarift faults. Since the Middle Miocene, the Wichianburi Subbasin has developed under the tectonic phase of post-rift subsidence with interruption by intrusive activities.

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“…The Sibumasu Block was separated from the Gondwana during the Late Carboniferous to Early Permian, evidenced from rift-related basaltic magmatism dated to 310-280 Ma (Liu et al 2020). Morley (2018) proposed that the Sibumasu Block comprised a ribbon continent, with the Mae Sariang Group being deposited along the rift trough and extensional basin that were generated by crustal thinning during the Permian. This scenario involving a lack of igneous activity within the Sibumasu Block during this period supports the observed lack of Permian to Triassic zircons in the Mae Sariang Group.…”

Section: C Sibumasu Block and Permian-triassic Hiatus In Igneous Activitymentioning

confidence: 99%

“…The Inthanon Zone is interpreted to represent nappes of Palaeo-Tethyan rocks thrust westward over a marginal part of the Sibumasu Block (Ueno & Hisada, 2001;Barber et al 2011;Morley, 2018;Mangkhemthong et al 2019). This mélange is also thrust over Carboniferous sedimentary rocks (Hara et al 2009).…”

Section: D Accretionary Complex In the Inthanon Zone And Revision Of Sandstone Classificationmentioning

confidence: 99%

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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Understanding Sibumasu in the context of ribbon continents

Cited by 42 publications

References 141 publications

Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data

Neoproterozoic to Early Triassic tectono-stratigraphic evolution of Indochina and adjacent areas: A review with new data

2D Sequential Restoration and Basin Evolution of the Wichianburi Sub-basin, Phetchabun Basin, Central Thailand

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

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