Zircon U–Pb ages and Hf isotopic compositions of alkaline silicic magmatic rocks in the Phan Si Pan-Tu Le region, northern Vietnam: Identification of a displaced western extension of the Emeishan Large Igneous Province

Usuki, Tadashi; Lan, Ching; Tran, Tri; Pham, Thi Dung; Wang, Kuo‐Lung; Shellnutt, J. Gregory; Chung, Sun‐Lin

doi:10.1016/j.jseaes.2014.10.016

Cited by 61 publications

(33 citation statements)

References 46 publications

(89 reference statements)

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“…The U-Pb zircon dating performed for these samples indicates that magmatic activity in the Kontum Massif occurred during the Late Permian, which is very similar to the timing of mafic igneous activity documented in the Song Da area (260-250 Ma: Usuki et al, 2015) situated 300 km north of the Kontum Massif.…”

Section: Metagabbro (Sample 00041903bsupporting

confidence: 63%

“…At this time, a major LIP component, the Song Da igneous suite, is thought to have formed in the northern part of the TVOB (Fig. 1: Hanski et al, 2004;Wang et al, 2007;Tran Viet Anh, 2011;Usuki et al, 2015). Moreover, as the Nd isotopic compositions of the Kontum Massif metagabbros resemble those of the Song Da mafic rocks (Fig.…”

Section: Magmatic Process Of Metagabbro Formationmentioning

confidence: 95%

“…9a). Such depleted εNd(t) mafic rocks from the Song Da igneous suite were derived from a mantle plume and correspond with the southern extension of the Emeishan LIP (Hanski et al, 2004;Wang et al, 2007;Hanski et al, 2010;He et al, 2010;Tran Viet Anh et al, 2011;Vladimirov et al, 2012;Usuki et al, 2015). Conversely, enriched εNd(t) mafic rocks from the Emeishan LIP, including those at Song Da, are thought to have formed from interaction between depleted mafic magma and enriched lithosphere, the latter including crustal rocks (Chung and Jahn, 1995;Wang et al, 2007;Hanski et al, 2010;Tran Viet Anh et al, 2011;Shellnutt, 2014).…”

Section: Magmatic Process Of Metagabbro Formationmentioning

confidence: 97%

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Late Permian plume–related magmatism and tectonothermal events in the Kontum Massif, central Vietnam

Owada

Osanai

Nakano

et al. 2016

Journal of Mineralogical and Petrological Sciences

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The Kontum Massif is situated in the southern part of Trans Vietnam Orogenic Belt (TVOB), central Vietnam, and contains various types of magmatic and metamorphic rocks, the latter including both ultrahigh-pressure and ultrahigh-temperature units. While geochronological data indicate the existence of two main tectonothermal events at 480-420 Ma and 270-240 Ma, the most intense metamorphic and magmatic activity occurred between the Late Permian and Early Triassic due to continental collision between the South China and Indochina cratons. In this study, U-Pb LA-ICP-MS geochronological analyses of zircon obtained from two samples of metagabbro and one sample of charnockite from the massif yielded a magmatic age range of 260-250 Ma for all three samples and an inherited age of~1400 Ma for the charnockite. These magmatic ages overlap with those documented for peak metamorphism in the Kontum Massif. When combined with Nd isotopic data for granitic rocks and pelitic gneisses from the region, these data suggest that the massif may have been derived from reworked continental crust. Geochemical characteristics of metagabbros from the massif reveal that the parental basaltic magma can be correlated with the Song Da igneous suite situated in the northern part of the TVOB, and was assimilated by crustal materials. The Song Da igneous suite is a member of the Emeishan large igneous province and resulted from Late Permian mantle plume activity. We conclude that the plume-related magma intruded into the deeper part of Kontum Massif and induced ultrahigh-temperature metamorphism of the lower crust by acting as a heat source.

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Section: Metagabbro (Sample 00041903bsupporting

confidence: 63%

Section: Magmatic Process Of Metagabbro Formationmentioning

confidence: 95%

Section: Magmatic Process Of Metagabbro Formationmentioning

confidence: 97%

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Late Permian plume–related magmatism and tectonothermal events in the Kontum Massif, central Vietnam

Owada

Osanai

Nakano

et al. 2016

Journal of Mineralogical and Petrological Sciences

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“…Some of the previous studies indicated a high-velocity lower crust beneath the Emeishan LIP , suggesting a mafic/ultramafic lower crust generated by lower crustal underplating or the upwelling mantle plume during the later Permian Usuki et al, 2015). However, the dominantly felsic to intermediate lower crust in this area identified from receiver function analyses (He et al, 2014;Sun et al, 2012) does not favour any underplating in the Emeishan LIP area.…”

Section: Mechanism Of the Emeishan Lip Formationmentioning

confidence: 60%

“…The crustal and/or mantle lithospheric delamination can generate mantle upwelling and extensive volcanism (Vlaar et al, 1994;van Thienen et al, 2004). A large-scale lower crustal and/or mantle lithospheric delamination or sinking (Hv3) (Fig.…”

Section: Mechanism Of the Emeishan Lip Formationmentioning

confidence: 99%

Mantle roots of the Emeishan plume: an evaluation based on teleseismic P-wave tomography

Santosh

2017

Solid Earth

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Abstract. The voluminous magmatism associated with large igneous provinces (LIPs) is commonly correlated to upwelling plumes from the core-mantle boundary (CMB). Here we analyse seismic tomographic data from the Emeishan LIP in southwestern China. Our results reveal vestiges of delaminated crustal and/or lithospheric mantle, with an upwelling in the upper mantle beneath the Emeishan LIP rather than a plume rooted in the CMB. We suggest that the magmatism and the Emeishan LIP formation might be connected with the melting of delaminated lower crustal and/or lithospheric components which resulted in plume-like upwelling from the upper mantle or from the mantle transition zone.

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Plutonic: Volcanic Associations in the Tu Le Basin and Phan Si Pan Uplift, Northwest Vietnam

Tran

Polyakov

Tran

et al. 2015

Modern Approaches in Solid Earth Sciences

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Zircon U–Pb ages and Hf isotopic compositions of alkaline silicic magmatic rocks in the Phan Si Pan-Tu Le region, northern Vietnam: Identification of a displaced western extension of the Emeishan Large Igneous Province

Cited by 61 publications

References 46 publications

Late Permian plume–related magmatism and tectonothermal events in the Kontum Massif, central Vietnam

Late Permian plume–related magmatism and tectonothermal events in the Kontum Massif, central Vietnam

Mantle roots of the Emeishan plume: an evaluation based on teleseismic P-wave tomography

Plutonic: Volcanic Associations in the Tu Le Basin and Phan Si Pan Uplift, Northwest Vietnam

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