Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos

Wang, Shifeng; Mo, Yasi; Wang, Chao; Ye, Peisheng

doi:10.1016/j.gr.2015.11.011

Cited by 76 publications

(46 citation statements)

References 70 publications

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“…Our samples from the North Qiangtang block yielded peaks in Hf and Nd T DM2 ages at ca. 2.0-1.6 and 1.2-0.8 Ga, consistent with those acquired from the Simao and Indochina regions (Lan et al, 2003;Wang et al, 2014Wang et al, , 2016. This correspondence indicates that in both the Qamdo region and southeastern Asia, the basement formed during the middle Mesoproterozoic-early Paleozoic.…”

Section: Single North Qiangtang-simao-indochina Blocksupporting

confidence: 80%

“…In addition, there is no evidence of a suture zone between the Qamdo, Simao, and Indochina microcontinents. All the above evidence supports the proposal that North Qiangtang, Simao, and Indochina represent a single block (e.g., Sone and Metcalfe, 2008;Metcalfe, 2013;Wang et al, 2016Wang et al, , 2018.…”

Section: Single North Qiangtang-simao-indochina Blocksupporting

confidence: 79%

“…Combining the results of previous research with the data presented in the present study allows the evolution of the Jinshajiang Paleo-Tethys to be divided into subduction (275-248 Ma) and collision (232-229 Ma) stages (Fig. 8) that are similar to the evolution of the Song Ma suture (Metcalfe, 2013;Wang et al, 2016). Therefore, our results show that over a distance of ~4000 km, from the central Qiangtang area to the Indochina region, the evolution of the Jinshajiang Paleo-Tethyan system is consistent, which implies an affinity among the WANG SHIFENG ET AL.…”

Section: Closure Of the Jinshajiang Paleo-tethys Oceansupporting

confidence: 74%

“…Therefore, our results show that over a distance of ~4000 km, from the central Qiangtang area to the Indochina region, the evolution of the Jinshajiang Paleo-Tethyan system is consistent, which implies an affinity among the WANG SHIFENG ET AL. | Geochronological, geochemical, and isotopic characteristics of granitoids in eastern Tibet RESEARCH North Qiangtang, Simao, and Indochina blocks, as previously inferred (Metcalfe, 2013;Wang et al, 2016).…”

Section: Closure Of the Jinshajiang Paleo-tethys Oceanmentioning

confidence: 54%

“…1A; e.g., Schwab et al, 2004;Angiolini et al, 2013). The relationships between blocks in southeastern Asia and those in Tibet are unclear, and many hypotheses have been proposed (e.g., Şengör, 1984;Royden et al, 2008;Pan et al, 2012;Metcalfe, 2013;Wang et al, 2016), including: (1) the Baoshan, Simao, and Shan Thai (Sibumasu) blocks represent the southeastern continuation of the Qiangtang block; (2) the Simao block represents an extension of the Qiangtang block, whereas the Baoshan and Shan Thai (Sibumasu) blocks correlate with the Lhasa block; (3) the Qiangtang block is divided into two parts, with the South Qiangtang block correlating with the Baoshan-Sibumasu block, and the WANG SHIFENG ET AL. | Geochronological, geochemical, and isotopic characteristics of granitoids in eastern Tibet WANG SHIFENG ET AL.…”

Section: Introductionmentioning

confidence: 99%

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Geochronological, geochemical, and Sr-Nd-Hf isotopic characteristics of granitoids in eastern Tibet and implications for tectonic correlation with southeastern Asia

Wang

Yao

2019

Lithosphere

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Understanding the configuration of continental blocks within the Tibetan orogen prior to Indo-Asian collision is vital to determining their accretionary history. However, complex tectonic overprinting, including the development of the eastern and western Himalayan syntaxes, has hampered the investigation of correlations between tectonic blocks in the Tibetan Plateau with those in southeastern Asia. The North Lancangjiang tectonic belt is known to connect with the Longmu Co-Shuanghu suture to the west and the Changning-Menglian suture to the south, but limited work has been undertaken in eastern Tibet, and no ophiolite suites or high-pressure (HP) to ultrahigh-pressure (UHP) metamorphic belts have been identified within this belt. This paper presents new in situ zircon U-Pb, whole-rock major-and traceelement, and whole-rock Sr-Nd-Hf isotopic data for three granitic plutons (Chaya, Jinba, and Batang) within the North Qiangtang block. These plutons yield ages from ca. 265 Ma (Chaya) to ca. 230 Ma (Batang). The Chaya and Batang granites are chemically similar to I-type granites, whereas the Jinba granite is an S-type granite. Sr-Nd-Hf isotopic data suggest that the Chaya granite formed from magmas generated by the partial melting of subduction-modified mantle wedge material and that the Jinba granite formed from magmas generated by the partial melting of Precambrian metasedimentary rocks mixed with a small amount of juvenile mantle-derived crustal material. The Batang granite formed from magmas generated by the partial melting of mafic lower-crustal material. The convergence of the North Qiangtang block with neighboring blocks was a consequence of the closure of the Paleo-Tethys Ocean, and the plutons in this area record subduction-related or syncollisional magmatism. New data from granites within the North Lancangjiang magmatic belt and the Jinshajiang suture indicate that the North Lancangjiang Paleo-Tethyan slab subducted eastward, whereas the Jinshajiang Paleo-Tethyan slab subducted westward under the North Qiangtang block at ca. 267 Ma. The timing and style of block convergence between North Qiangtang-Simao-Indochina and neighboring blocks are similar to those recorded within central Tibet and southeastern Asia. This, combined with the presence of similar Middle Mesoproterozoic-Lower Paleozoic basement materials and Paleozoic sediments hosting Cathaysian warm-climate fossils, indicates that North Qiangtang, Simao, and Indochina represent a single block.

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Section: Single North Qiangtang-simao-indochina Blocksupporting

confidence: 80%

Section: Single North Qiangtang-simao-indochina Blocksupporting

confidence: 79%

Section: Closure Of the Jinshajiang Paleo-tethys Oceansupporting

confidence: 74%

Section: Closure Of the Jinshajiang Paleo-tethys Oceanmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

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Geochronological, geochemical, and Sr-Nd-Hf isotopic characteristics of granitoids in eastern Tibet and implications for tectonic correlation with southeastern Asia

Wang

Yao

2019

Lithosphere

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Records of the oceanic propagator closure at the southern splay of the Palaeo‐Tethys

Choong

Pubellier

Sautter³

et al. 2022

Geological Journal

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The Palaeo‐Tethys is known to have diverged into several splays throughout East and South‐east Asia. Several researchers have widely studied the importance and geometries of the Palaeo‐Tethys' branches. Plate reconstruction geometries for the southern Palaeo‐Tethys splay suggest that the ocean either connects to the proto‐Pacific or dies out. We review and discuss the Late Palaeozoic to the Early Mesozoic lithologies attributed to the Palaeo‐Tethys, from the Himalayan Syntaxis in the north to the Bangka and Belitung islands in western Indonesia to the south. Relics of oceanic crust and deep‐sea sediments related to the main Palaeo‐Tethys Basin can be traced from the South China (Yunnan)‐Thailand border to Peninsular Malaysia. A sub‐parallel back‐arc suture exists in eastern Thailand in the north and vanishes towards the south at the latitude of the Gulf of Thailand. Towards the south of Peninsular Malaysia, the material that constitutes the suture zone of main Palaeo‐Tethys is found offshore in the Riau Archipelago, Indonesia, and has been extensively eroded. Thus, we rely on gravity signatures to extrapolate the extension of the structures to the Bangka and Belitung islands, which show only minor serpentine and pillow basalts occurrences along a line that curves towards Borneo. The metamorphic rocks associated with the suture zones range from high grade (gneiss) in Thailand to low grade (mica schist and minor amphibolite) in Peninsular Malaysia. The syn‐ and post‐collisional granitic bodies that form large batholiths in Thailand and Malaysia are comparatively smaller in Indonesia, particularly on Belitung Island, suggesting the lack of large underplating of the Sibumasu crust within the region. We interpret the stratigraphic and tectonic observations of the southern Palaeo‐Tethys to support the theory of the southward (present orientation) opening of a propagating oceanic basin from Devonian to Carboniferous, which began to close from the Permian to Triassic period.

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Provenance and paleogeography of the Mesozoic strata in the Muang Xai Basin, northern Laos: petrology, whole-rock geochemistry, and U–Pb geochronology constraints

Wang

Wei

et al. 2017

Int J Earth Sci (Geol Rundsch)

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Paleotethyan evolution of the Indochina Block as deduced from granites in northern Laos

Cited by 76 publications

References 70 publications

Geochronological, geochemical, and Sr-Nd-Hf isotopic characteristics of granitoids in eastern Tibet and implications for tectonic correlation with southeastern Asia

Geochronological, geochemical, and Sr-Nd-Hf isotopic characteristics of granitoids in eastern Tibet and implications for tectonic correlation with southeastern Asia

Records of the oceanic propagator closure at the southern splay of the Palaeo‐Tethys

Provenance and paleogeography of the Mesozoic strata in the Muang Xai Basin, northern Laos: petrology, whole-rock geochemistry, and U–Pb geochronology constraints

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