Multiple Tethyan ocean basins and orogenic belts in Asia

Metcalfe, Ian

doi:10.1016/j.gr.2021.01.012

Cited by 241 publications

(98 citation statements)

References 253 publications

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“…As our work has concentrated on sedimentary sequences and their contained faunas, we will attempt to integrate these numerous petrological studies with work on sedimentary, palaeontological, and provenance studies in order to construct a preliminary tectonic model for the region which identifies three terranes that docked in the earliest Carboniferous (Truong Son with Loei-Phetchabun) and in the Permian (Kontum). Although many geoscientists continue to regard the Indochina Terrane/Block as unitary for pre-Permian time (e.g., Yan et al, 2020;Metcalfe, 2021) here we follow Mouret (1994), Lepvrier et al (1997Lepvrier et al ( , 2004Lepvrier et al ( , 2008, Burrett et al (2014a), Khin et al (2014), Lai et al (2014), Tran et al (2014), andTri et al (2020) in recognizing Indochina as a composite formed by the amalgamation of three or more terranes during the Palaeozoic. Regarding Indochina as a unitary block in the pre-Visean can no longer be maintained (Figure 1).…”

Section: Introductionmentioning

confidence: 93%

“…A major distinction between Sibumasu and Indochina was regarded as the presence of early Permian glacimarine sediments and faunas on Sibumasu and the coeval tropical carbonates and faunas on Indochina. The subsequent recognition of Permo-Carboniferous tropical marine faunas in part of northern Thailand, closely associated with basalts and deep-water sediments, led to the introduction and definition of the Inthanon Terrane (Barr et al, 1990;Barr and MacDonald, 1991;Ueno and Charoentitirat, 2011;Metcalfe, 2021) with the Mae Yuam Fault Zone (MYFZ on Figure 1) forming its western boundary and the Permo-Triassic volcanic arc Sukhothai Terrane forming its eastern boundary (SU on Figure 1).…”

Section: Introductionmentioning

confidence: 99%

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The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

2021

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The three main regions of Indochina are defined as the Truong Son, Loei-Phetchabun, and Kontum terranes. The aim of this review is to integrate numerous petrological studies with sedimentary, palaeontological, and provenance studies in order to construct a preliminary tectonic model which shows the terranes docked in the earliest Carboniferous (Truong Son with Loei-Phetchabun) and in the Permian (Kontum). The Kontum Terrane is characterized by Proterozoic magmatism, mid-Ordovician to Early Devonian granites, and Permian charnockites. Major carbonate platforms developed in the Givetian to earliest Tournaisian on Truong Son and from the Visean to mid-Permian across Truong Son and Loei-Phetchabun terranes. The Truong Son has Silurian granites and a Late Ordovician to Silurian magmatic arc along its southern and western borders caused by subduction of oceanic lithosphere, the remnants of which are now partially preserved in the Loei and Tamky sutures. A region to the east of the Loei Suture in the Loei Foldbelt has a similar-age volcanic arc extending northwards into Laos and is included in Truong Son. A platform-margin coral-stromatoporoid reef developed on Truong Son in the Frasnian and was coincident with a gap in magmatism until the Pennsylvanian with granite magmatism became widespread until the Late Triassic. In the Loei-Phetchabun Terrane, Devonian siliciclastics, volcanics are overlain by Givetian limestones and patch reefs and in turn overlain by Late Devonian to earliest Tournaisian radiolarian cherts and siliciclastics. Tournaisian to early Visean siliciclastic turbidites were coincidental with initial uplift and deformation and were replaced by Visean terrestrial evaporites and coal and marine limestones. Arc magmatism along the Loei-Phetchabun Terrane indicates intermittent eastward subduction from mid-Devonian to mid-Triassic. Carboniferous-Triassic volcanism extends eastward along the northern margin of Cambodia and is probably an extension of Loei-Phetchabun. Ordovician within-plate basalts in Kontum and the transition from shallow marine Ordovician siliciclastics to Silurian deep-marine sediments and a volcanic arc in Truong Son suggest rifting of both terranes from Gondwana in the Late Ordovician. Initial docking of Truong Son with South China was probably in the late Silurian to Early Devonian and docking of Loei-Phetchabun and Truong Son was in the late Tournaisian to early Visean.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

2021

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“…The south and southeast Eurasian continent consists of a series of Gondwana‐derived microcontinents (e.g., Tarim, Qaidam, North Qiangtang, South Qiangtang, Lhasa, India, Sibumasu, Indochina, and South China), which were successively rifted from northern Gondwana, and then progressively accreted onto the southern margin of Laurasia. This continental transfer was coeval with the opening and closure of the Proto‐, Paleo‐, and Neo‐Tethys oceans (Figure 1; e.g., Faure et al., 2014, 2018; Metcalfe, 2002, 2011, 2013, 2021; Metcalfe et al., 2017; Sone & Metcalfe, 2008). Among these microblock collisions, the amalgamation of the South China Block (SCB) and Indochina Block (IB) is one of the most controversial.…”

Section: Introductionmentioning

confidence: 96%

Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

Wang¹,

Lin²,

Faure

et al. 2021

Tectonics

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The location of the suture zone between the South China Block (SCB) and the Indochina Block (IB) is disputed. Recently, along the Song Chay (Chay river) belt, a mélange zone was proposed as a potential suture zone of the SCB and IB. However, the provenance and age of the Song Chay mélange is poorly known. In order to better constrain the age and provenance of the elements forming the Song Chay mélange, nine samples of detrital material, and one orthogneiss were subjected to zircon U‐Pb and Hf isotope analysis. Detrital zircons from the silty matrix of the Song Chay mélange record three major Neoproterozoic age clusters at 580–650, 700–800, and 900–1,000 Ma, which correspond well to the substratum of the SCB. Two minor Late and Early Paleozoic age groups at 270–330, and 420–500 Ma, with mainly negative εHf(t) values were also recovered. We consider that the zircons in the matrix of the mélange were mainly derived from the subducting plate, namely the SCB. This interpretation is supported by the occurrence of lensoid sandstone blocks, representing the substratum of the SCB, included into the mélange. The deposition age of the Song Chay mélange is between 310 and 250 Ma. Our results demonstrate that in an ophiolitic mélange, the detrital material does not invariably come from the overriding plate, but at the onset of the collision, the subducting continental plate may also supply the terrigenous material.

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“…Southeast Asia represents a complex collage of crustal blocks, volcanic arcs and suture zones progressively accreted during convergent tectonics associated with opening and closure of the Paleo-, Meso-, and Ceno-Tethys oceanic basins and subduction of the Paleo-Pacific in the late Paleozoic to Cenozoic (Metcalfe, 2013a(Metcalfe, , 2021Hall, 2012) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Permian to Cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina

Waight¹,

Fyhn

Thomsen

et al. 2021

Journal of Asian Earth Sciences

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Multiple Tethyan ocean basins and orogenic belts in Asia

Cited by 241 publications

References 253 publications

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions

Detrital Zircon U‐Pb Age Distribution and Hf Isotopic Constraints From the Terrigenous Sediments of the Song Chay Suture Zone (NE Vietnam) and Their Paleogeographic Implications on the Eastern Paleo‐Tethys Evolution

Permian to Cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina

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