Llandovery (lower Silurian) graptolites from the Sepon Mine, Truong Son Terrane, central Laos and their palaeogeographical significance

Loydell, David K.; Udchachon, Mongkol; Burrett, Clive

doi:10.1016/j.jseaes.2018.11.013

Cited by 15 publications

(20 citation statements)

References 58 publications

(53 reference statements)

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“…This conclusion was based on the identification of stenothermic species of graptolite, the distribution of which were dominantly controlled by sea surface temperature, which in turn was used to infer their paleolatitude. However, as also noted by Loydell et al (2019), the disposition of continents could have deflected warm current polewards and cold water equatorwards, thereby increase the latitudinal range of these species. Therefore, the paleolatitude difference between the Sino-Vietnam and Indochina composite terranes might not have been so large.…”

Section: Middle Ordovician-silurian Evolutionmentioning

confidence: 63%

“…2&3), and at the southwestern margin of Viet-Lao terrane (Thassanapak et al, 2018). Recently, Loydell et al (2019) interpreted the Early Silurian graptolites found in the Viet-Lao terrane to reflect mid to high latitude, closer to peri-Gondwana Europe and Arabia than South China, which laid in a low latitude position. This conclusion was based on the identification of stenothermic species of graptolite, the distribution of which were dominantly controlled by sea surface temperature, which in turn was used to infer their paleolatitude.…”

Section: Middle Ordovician-silurian Evolutionmentioning

confidence: 99%

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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: Middle Ordovician-silurian Evolutionmentioning

confidence: 63%

Section: Middle Ordovician-silurian 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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“…Available data show that the meta‐volcanic rocks from the Huimin volcano‐sedimentary sequence and the associated mafic rocks in the Lancang Group formed at 462–454 Ma and 473–439 Ma, respectively (e.g., Liu et al., 2017; Nie et al., 2015; B. Wang et al., 2013; X. W. Xing et al., 2015). Such the age‐spectra (Figure 10a) suggests the Lancang Group and its equivalents likely formed in the Ordovician‐early Silurian, resembling the Nam Houay volcano‐sedimentary sequence in eastern Indochina (e.g., Loydell et al., 2019; Thassanapak et al., 2018; Wang et al., 2020a, 2020b, 2020c).…”

Section: Discussionmentioning

confidence: 94%

“…W. Xing et al, 2015). Such the age-spectra (Figure 10a) suggests the Lancang Group and its equivalents likely formed in the Ordovician-early Silurian, resembling the Nam Houay volcano-sedimentary sequence in eastern Indochina (e.g., Loydell et al, 2019;Thassanapak et al, 2018;Wang et al, 2020aWang et al, , 2020bWang et al, , 2020c.…”

Section: Ordovician-silurian Lancang Group and Its Equivalentsmentioning

confidence: 94%

Prototethyan Accretionary Orogenesis Along the East Gondwana Periphery: New Insights From the Early Paleozoic Igneous and Sedimentary Rocks in the Sibumasu

Wang

Qian

Cawood

et al. 2021

Geochem Geophys Geosyst

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“…The terrane concept replaces, at least partially, many ambiguous or loosely defined terms, often genetic and often derived from geosynclinal theory, such as massif, block, fold belt, craton, eugeosyncline, geanticline, etc. China) is based on the existence of widespread Silurian strata which is typical of the Truong Son Terrane rather than the Loei-Phetchabun Terrane (Loydell et al, 2019). The extent of the Loei-Phetchabun and Truong Son terranes under the Mesozoic terrestrial siliciclastics of the Khorat Group on the Khorat Plateau is highly speculative due to a lack of petroleum wells that have penetrated the "mid"-Carboniferous unconformity which is picked on several seismic sections [see Booth and Sattayarak (2011)].…”

Section: Terrane Definitions and Constituent Terranes Of Indochina Terrane Definitionsmentioning

confidence: 99%

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.

show abstract

Llandovery (lower Silurian) graptolites from the Sepon Mine, Truong Son Terrane, central Laos and their palaeogeographical significance

Cited by 15 publications

References 58 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

Prototethyan Accretionary Orogenesis Along the East Gondwana Periphery: New Insights From the Early Paleozoic Igneous and Sedimentary Rocks in the Sibumasu

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

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