Late Permian to Early Triassic crustal evolution of the Kontum massif, central Vietnam: zircon U–Pb ages and geochemical and Nd–Hf isotopic composition of the Hai Van granitoid complex

Hiếu, Phạm Trung; Yang, Yu-Jun; Binh, Do Quoc; Nguyen, Thi Bich Thuy; Dung, Le Tien; Chen, Fukun

doi:10.1080/00206814.2015.1031194

Cited by 38 publications

(36 citation statements)

References 57 publications

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“…Three metamorphic rocks were dated with the 40 Ar/ 39 Ar method in this study. Two samples yielded Ishihara and Orihashi (2014), Hieu et al (2015) and Halpin et al (2016). Similar magmatic activity is reported from SE China by Shao et al (1995), Yu et al (2010), Deng et al (2012, and Mao et al (2013), and from Hainan Island by Li et al (2006) and Jiang et al (2015).…”

Section: Triassic Metamorphismsupporting

confidence: 83%

A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo

et al. 2017

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Metamorphic rocks in West Sarawak are poorly exposed and studied. They were previously assumed to be pre-Carboniferous basement but had never been dated. New 40 Ar/ 39 Ar ages from white mica in quartz-mica schists reveal metamorphism between c. 216 to 220 Ma. The metamorphic rocks are associated with Triassic acid and basic igneous rocks, which indicate widespread magmatism. New U-Pb dating of zircons from the Jagoi Granodiorite indicate Triassic magmatism at c. 208 Ma and c. 240 Ma. U-Pb dating of zircons from volcaniclastic sediments of the Sadong and Kuching Formations confirm contemporaneous volcanism. The magmatic activity is interpreted to represent a Triassic subduction margin in westernmost West Sarawak with sediments deposited in a forearc basin derived from the magmatic arc at the Sundaland-Pacific margin. West Sarawak and NW Kalimantan are underlain by continental crust that was already part of Sundaland or accreted to Sundaland in the Triassic. One metabasite sample, also previously assumed to be pre-Carboniferous basement, yielded Early Cretaceous 40 Ar/ 39 Ar ages. They are interpreted to indicate resumption of subduction which led to deposition of volcaniclastic sediments and widespread magmatism. U-Pb ages from detrital zircons in the Cretaceous Pedawan Formation are similar to those from the Schwaner granites of NW Kalimantan, and the Pedawan Formation is interpreted as part of a Cretaceous forearc basin containing material eroded from a magmatic arc that extended from Vietnam to west Borneo. The youngest U-Pb ages from zircons in a tuff layer from the uppermost part of the Pedawan Formation indicate volcanic activity continued until c. 86 to 88 Ma when subduction terminated.

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Section: Triassic Metamorphismsupporting

confidence: 83%

A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo

et al. 2017

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“…Zircon U-Pb age and geochemical characteristics of the Dai Loc granites from our study suggest the presence of subduction-related magmatism in the region. This is coincide with conclusion of Nakano et al (2013) that in the Ordovician-Silurian, the region was characterized by active continental margin tectonics, followed by continental collision during the Late Permian to Early Triassic and subsequent exhumation during the Late Triassic (Hieu et al, 2015).…”

Section: Implications For Early Paleozoic Tectonic Evolution In Centrsupporting

confidence: 77%

“…Paleozoic to Mesozoic intrusive granitoids are exposed widely in the massif [DGMVN (Department of Geology and Minerals of Vietnam), 1989Vietnam), , 1995Nam 1998;Nam et al, 2001]. According to Hieu et al (2015), granitoids in the northern Kontum massif can be divided mainly into four complexes based on zircon U-Pb ages and geochemical and Nd-Hf isotopic compositions, namely: the Hai Van, Ben Giang -Que Son, Deo Ca, and Dai Loc complexes (Fig. 1b).…”

Section: Geological Settingmentioning

confidence: 99%

U–Pb ages and Hf isotopic composition of zircon and bulk rock geochemistry of the Dai Loc granitoid complex in Kontum massif: Implications for early Paleozoic crustal evolution in Central Vietnam

Hiếu

Dung

Thủy³

et al. 2016

Journal of Mineralogical and Petrological Sciences

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The northern Kontum massif in central Vietnam, one of the most key tectonic and metallogenic terranes of the Indochina block, consists of numerous volcano-plutonic complexes including the Dai Loc granitic complex that formed an essential part of the early Paleozoic batholith of the massif. Rocks of the Dai Loc complex are granodiorite and granite in composition. Geochemically, the rocks are of sub-alkaline affinity and belong to high-potassium series. These rocks have moderate Aluminum Saturation Index (ASI) values of 0.76-1.19 and low Mg# values of 23-39. Zircon grains separated from the rocks have high ε Hf (t) values and old Hf model ages (T DM ) which varying from −0.7 to +4.8 and 0.9 to 1.1 Ga, respectively. All these characteristics, in conjunction with trace element features, suggest generation by partial melting of crustal source rocks with additional input of mantle-derived material. Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) zircon U-Pb analytical results from two samples revealed emplacement ages of the granite at 423 ± 2.2 and 427 ± 9.9 Ma. Our geochronological data provide evidence for early Paleozoic crustal evolution in Central Vietnam.

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“…The late Paleozoic volcanic arcs were formed due to the subduction of Paleo-tethys beneath the southwestern edge of the Indochina Plate, which currently reveals some combinations of alkali basalt-andesite, flysch, and turbidite in Southwest Vietnam (Bao, 2001). Liu et al, 2012;Hieu et al, 2015Hieu et al, , 2017. Such magmatic stages were also recognized in the Truong Son Fold Belt and Kontum Massif (Figure 1a), along the Po Ko structural zone, as demonstrated by presence of numerous Late Permo-Mid Triassic 290-230 Ma time interval granitoid rocks (e.g.…”

Section: Hf Isotopic Compositionmentioning

confidence: 74%

“…As the reference standard, zircon 91500 was used and yielded mean 176 Hf/ 177 Hf ratios of 0.2822952 ± 0.0000056 (n = 111, 2σ). The operating conditions for laser ablation system as well as ICP-MS instrument were reported by Hieu et al (2015). The five isotopes 176 Hf, 177 Hf, 176 Lu, 177 Lu and 176 Yb were monitored.…”

Section: Hf Isotopic Analysismentioning

confidence: 99%

Geochemistry, zircon U–PB ages and HF isotopes of the Muong Luan granitoid pluton, Northwest Vietnam and its petrogenetic significance

et al. 2019

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The Indosinian Orogeny plays a significant role in tectonic background and magmatic evolution in Indochina and surrounding regions. Being a part product of the Indosinian magmatism in northwest Vietnam during late Permian-middle Triassic period, Muong Luan granitoid pluton dominantly consists of granodiorite, less diorite and granite. This pluton is located in the Song Ma suture and assigned to the Dien Bien complex. Geochemically, the Muong Luan granitoid rocks are characterized by a wide range of SiO 2 contents (59.9-75.1 wt%) and high K 2 O contents. They display typical features of I-type granites. The presence of hornblende and no muscovite and cordierite in the rocks further supports for I-type character of granitoids. The emplacement age of the Muong Luan pluton obtained by LA-ICP-MS U-Pb zircon is at 242-235 Ma, corresponding to Indosinian time. Zircon ε Hf values of-5.6 to-10.4, in combination with moderate Mg values of 34-45 suggested that the Muong Luan granitoid was derived from partial melting of mafic crustal source rocks, which are probably Paleoproterozoic in age as revealed by Hf model ages (T DM2 = 1624-1923 Ma).

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Late Permian to Early Triassic crustal evolution of the Kontum massif, central Vietnam: zircon U–Pb ages and geochemical and Nd–Hf isotopic composition of the Hai Van granitoid complex

Cited by 38 publications

References 57 publications

A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo

A Triassic to Cretaceous Sundaland–Pacific subduction margin in West Sarawak, Borneo

U–Pb ages and Hf isotopic composition of zircon and bulk rock geochemistry of the Dai Loc granitoid complex in Kontum massif: Implications for early Paleozoic crustal evolution in Central Vietnam

Geochemistry, zircon U–PB ages and HF isotopes of the Muong Luan granitoid pluton, Northwest Vietnam and its petrogenetic significance

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