The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam

Владимиров, А. Г.; Phan, L. A.; Травин, А. В.; Михеев, Е. И.; Мурзинцев, Н. Г.; Annikova, I. Yu.

doi:10.1134/s1819714020040065

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…Although the whole history of the magmatic arc, at least for the eastern Sundaland, may be explained by a single flatsubduction model since the Triassic [42,43] tectonic event, most authors prefer to invoke a northward slab pull from north-dipping subduction of a Tethyan crust beneath Eurasia. Although the Jurassic and Cretaceous magmatism has been recently attributed to the Paleo-Pacific [41], the data only indicate a long-lasting west verging subduction beneath Eurasia notwithstanding, whether exotic blocks existed between the subduction zone and the Paleo Pacific Ocean. The simple geometry proposed hereafter is controlled by an oceanfloored basin situated east of the Cretaceous volcanic arc, which would correlate with the oceanic gap between the Argo Block and Sundaland Cretaceous (Figure 2).…”

Section: The Mesozoic Settingmentioning

confidence: 78%

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Key Structural Elements around the East Vietnam Sea (South China Sea) and implications on reconstructions: towards a clarification

Pubellier

Sautter²

2022

VJMST

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The East Vietnam Sea (EVS) or the South China Sea (SCS in this paper) is one of the best-studied basins in the world and one of the largest marginal basins. If the mechanisms of rifting and spreading are well documented and invoke many specific aspects of structure and evolution, it has nevertheless been highly controversial in terms of its relationships with the neighboring basins; some of which have partly or entirely disappeared. This paper recapitulates the critical structural elements, such as the localization of magmatic activity and rifted basins from the Cretaceous to the Present, to evaluate the arguments for the reconstructions. We begin with the location of the Cretaceous magmatic arc along the Vietnam and China margins to discuss the setting and timing of the subduction of an oceanic domain which is unlikely to be the Proto South China Sea (PSCS) itself. This evolution raises the question of the existence and modalities of docking of the Argo and Luconia blocks and requires an intensive stretching of this early docked continental basement before seafloor spreading in the PSCS and the Celebes Sea from the end of Cretaceous to the Oligocene. The SCS was the latest basin to open within the continental margin and is believed to have developed within the downgoing plate. The crustal blocks separated by rifting and sea-floor spreading were later shortened from the Early Miocene to the Present, leaving the appearance of a complex tectonic system. This exercise indicates simple solutions which had not been stated previously, such as the possible connection between the Tethys Ocean and an oceanic domain between the PSCS and the coastal regions of China and Vietnam. The PSCS developed later toward the South, probably in a back-arc position, and the EVS opened amid this system intrinsically linked to the subduction of the PSCS.

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Section: The Mesozoic Settingmentioning

confidence: 78%

“…The latest event of Cretaceous granite in Southern Vietnam ranges from 113 to 87 [39,40], with a peak at 100 Ma according to Z/U-Pb geochronology. Recent geochronological data (Zircon U-Pb) also suggests the remobilization of Indosinian protoliths [40,41].…”

Section: The Mesozoic Settingmentioning

confidence: 99%

Key Structural Elements around the East Vietnam Sea (South China Sea) and implications on reconstructions: towards a clarification

Pubellier

Sautter²

2022

VJMST

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“…The reported data on the igneous complexes and related metallogeny of the region allow us to update the existing evolution models of the South Ural accretionary-collisional system. Unlike those models postulating predominant suprasubduction, collisional, and postcollisional magmatism [Tevelev, Kosheleva, 2002;Puchkov, 2003Puchkov, , 2010Tevelev et al, 2006;Fershtater et al, 2007;Fershtater, 2013], we additionally distinguish a setting of transform boundaries [Vladimirov et., 2020]. The transform boundary conditions left record in many similar structures of Asia: Early Cretaceous and Eocene geodynamic complexes in eastern Asia; Jurassic -Early Cretaceous complexes in the regions of Kolyma Loop, Mongolia-Okhotsk belt, and Transbaikalia; and Devonian to Permian complexes in the Altai region [Khanchuk et al, 1997[Khanchuk et al, , 2019Martynov et al, 2002;Simanenko et al, 2006;Vladimirov et al, 2020;Martynov, Khanchuk, 2013;Kruk, 2015].…”

Section: Discussionmentioning

confidence: 99%

“…Most of controversy in the history of uralides and altaides concerns plume tectonics [Dobretsov et al, 2010] and its denied or overestimated role as the main cause of magmatism and related abundant magmatic, hydrothermal, and epithermal mineralization. Meanwhile, most models overlook the contribution of mantle diapirism which is the post-subduction response of the asthenosphere to plate collisions and/or sliding past one another [Davies, von Blanckenburg, 1995;Khain et al, 1996;Tychkov, Vladimirov, 1997]. Reliable seismic tomographic evidence of asthenospheric slab tears is available for Cenozoic orogens (Pacific coasts of both Americas and eastern Eurasia, etc.…”

Section: Introductionmentioning

confidence: 99%

Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Kosarev

Владимиров

Ханчук

et al. 2021

Geodin. tektonofiz.

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The oceanic stage in the history of the South Urals completed in the Ordovician – Early Silurian. The Ordovician through Devonian events in the region included the formation of an island arc in the East Ural zone from the Middle Ordovician to Silurian; westward motion of the subduction zone in the Late Silurian – Early Devonian and the origin of a trench along the Main Ural Fault and the Uraltau Uplift; volcanic eruptions and intrusions in the Magnitogorsk island arc system in the Devonian. The Middle-Late Paleozoic geodynamic evolution of uralides and altaides consisted in successive alternation of subduction and collisional settings at the continent-ocean transition. The greatest portion of volcanism in the major Magnitogorsk zone was associated with subduction and correlated in age and patterns of massive sulfide mineralization (VMS) with Early – Middle Devonian ore-forming events in Rudny Altai. Within-plate volcanism at the onset of volcanic cycles records the Early (D1e2) and Middle (D2ef2) Devonian slab break off. The volcanic cycles produced, respectively, the Buribay and Upper Tanalyk complexes with VMS mineralization in the Late Emsian; the Karamalytash complex and its age equivalents in the Late Eifelian – Early Givetian, as well as the lower Ulutau Formation in the Givetian. Slab break off in the Late Devonian – Early Carboniferous obstructed the Magnitogorsk island arc and supported asthenospheric diapirism. A new subduction zone dipping westward and the Aleksandrovka island arc formed in the Late Devonian – Early Carboniferous. The Early Carboniferous collision and another event of obstructed subduction led to a transform margin setting corresponding to postcollisional relative sliding of plates that produced another slab tear. Postcollisional magmatism appears as alkaline gabbro-granitic intrusives with related rich Ti-magnetite mineralization (C1). Transform faulting persisted in the Middle Carboniferous through Permian, when the continent of Eurasia completed its consolidation. The respective metallogenic events included formation of Cu-Ni picritic dolerites (C2–3), as well as large-scale gold and Mo-W deposits in granites (P1–2).

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Zircon U–Pb geochronology and Sr–Nd–Hf isotopic compositions of the felsic dykes from the Dalat zone, southern Vietnam: petrogenesis and geological significance

Hiếu

Minh

Wang

et al. 2022

International Geology Review

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The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam

Cited by 4 publications

References 21 publications

Key Structural Elements around the East Vietnam Sea (South China Sea) and implications on reconstructions: towards a clarification

Key Structural Elements around the East Vietnam Sea (South China Sea) and implications on reconstructions: towards a clarification

Devonian-Carboniferous Magmatism and Metallogeny in the South Ural Accretionary-Collisional System

Zircon U–Pb geochronology and Sr–Nd–Hf isotopic compositions of the felsic dykes from the Dalat zone, southern Vietnam: petrogenesis and geological significance

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