U–Pb zircon age, geochemical and Sr–Nd isotopic data as constraints on the petrogenesis and emplacement time of andesites from Gerze, southern Qiangtang Block, northern Tibet

Liu, Сhen; Hu, Ruizhong; Gao, Shan; Chen, Feng; Coulson, Ian M.; Guo, Feng; Qi, Youqiang; Yang, Yuhong; Yang, Chenghu; Liang, Tao

doi:10.1016/j.jseaes.2011.09.025

Cited by 44 publications

(45 citation statements)

References 27 publications

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“…Our new zircon U-Pb age data, together with currently available high-quality zircon U-Pb geochronological data (e.g., Chang et al, 2011;Kapp et al, 2005;Li et al, 2011Li et al, , 2013Li et al, , 2014aLiu et al, 2012Liu et al, , 2014Zhang, 2007;Zhang et al, 2012a), corroborate the presence of a Middle Jurassic-Early Cretaceous continental arc extending ca. 1100 km along the length of southern Qiangtang sub-block from Rotug to Amdo (Fig.…”

Section: Late Mesozoic Magmatism In Southern Qiangtangsupporting

confidence: 76%

“…11a) (e.g., Kapp et al, 2005;Li et al, 2014a,b;Liu et al, 2012Liu et al, , 2014. The present study provides additional evidence for this northward subduction because the Rena Co magnesian diorites formed by the interaction of oceanic sediments diapirs-derived melts and mantle wedge peridotites.…”

Section: Geodynamic Processessupporting

confidence: 58%

“…124 Ma) and granodiorite porphyries in the Duolong area (ca. 118 Ma), which recent studies link to fractionated products of basaltic melts derived from mantle wedge peridotites (Li et al, 2013;Liu et al, 2012). In addition, their εHf(t) values of +4.7 to +9.7 are similar to those of the Early Cretaceous granodiorite porphyries (ca.…”

Section: Granodiorite Porphyriesmentioning

confidence: 72%

“…1b). These rocks are dominated by intermediate-felsic magmatic rocks and currently available geochronological data (e.g., Chang et al, 2011;Guynn et al, 2006;Kapp et al, 2005;Li et al, 2011Li et al, , 2013Li et al, , 2014aLiu et al, 2012Liu et al, , 2014Zhang et al, 2012a) indicate that they were emplaced between 183 and 101 Ma.…”

Section: Geological Setting and Petrographical Characteristicsmentioning

confidence: 99%

“…A wide range zircon εHf(t) values from − 8.7 to +4.8 (up to 13-ε units) in the Rena Co magnesian diorites is consistent with the interaction of sediment diapirs-derived melts and asthenosphere mantle-derived melts and we therefore suggest that oceanic sediment diapirs are a likely source for the Rena Co magnesian diorites. Data sources: (Chang et al, 2011;Kapp et al, 2005;Li et al, 2011Li et al, , 2013Li et al, , 2014aLiu et al, 2012Liu et al, , 2014Sui et al, 2013;Zhang, 2007;Zhu et al, 2009Zhu et al, , 2011; this study).…”

Section: Dioritesmentioning

confidence: 99%

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Underplating of basaltic magmas and crustal growth in a continental arc: Evidence from Late Mesozoic intermediate–felsic intrusive rocks in southern Qiangtang, central Tibet

Hao

Wang

Wyman

et al. 2016

Lithos

118

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Section: Late Mesozoic Magmatism In Southern Qiangtangsupporting

confidence: 76%

Section: Geodynamic Processessupporting

confidence: 58%

Section: Granodiorite Porphyriesmentioning

confidence: 72%

Section: Geological Setting and Petrographical Characteristicsmentioning

confidence: 99%

Section: Dioritesmentioning

confidence: 99%

See 3 more Smart Citations

Underplating of basaltic magmas and crustal growth in a continental arc: Evidence from Late Mesozoic intermediate–felsic intrusive rocks in southern Qiangtang, central Tibet

Hao

Wang

Wyman

et al. 2016

Lithos

118

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Andesitic crustal growth via mélange partial melting: Evidence from Early Cretaceous arc dioritic/andesitic rocks in southern Qiangtang, central Tibet

Hao

Wang

Wyman

et al. 2016

Geochem. Geophys. Geosyst.

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Deciphering the petrogenesis of andesitic/dioritic rocks is fundamental to understanding the formation of the continental crust. Here we present detailed petrology, geochronology, major and trace element, Sr-Nd-Hf-O isotope data for the Early Cretaceous (122 Ma) dioritic rocks in the Bizha area in southern Qiangtang, Tibet. The dioritic rocks are characterized by large ion lithophile elements, Pb, and light rare earth elements but depletion of high field strength elements with slightly enriched and variable eNd (t)

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Subduction of the Bangong-Nujiang Ocean: constraints from granites in the Bangong Co area, Tibet

et al. 2013

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We report geochronologic, whole‐rock geochemical and Sr–Nd isotopic analyses of the granites that are exposed to both the north and the inside of the Bangong–Nujiang Suture (BNS) zone as well as the implications for the Mesozoic history of Tibet. To the north of the BNS, the Larelaxin pluton consists of I‐type quartz diorite and highly fractionated I‐type biotite granite. The Larelaxin pluton is enriched in large‐ion lithophile elements (LILE) but depleted in high‐field‐strength elements (HFSE); therefore, it exhibits the features of volcanic arc rocks. The initial Sr (0.7102 to 0.7215) and negative εNd (t) (−2.91 to −5.20) values imply a mixture of depleted mantle and continental crust. The mean 206Pb/238U zircon age is 168 Ma; we therefore propose that the Bangong–Nujiang Ocean (BNO) had already been subducted beneath the Qiangtang terrain by the middle Jurassic. Inside the BNS, the Rutog granites intruded into the Lagongtang and Duoren formations, which show a continental margin and a forearc basin sedimentary facies, respectively. The mean 206Pb/238U zircon age is 101 Ma. The Rutog granites are monzogranites with a high Na/K ratio (Na2O/K2O > 1) and a high LILE/HFSE ratio, and A/CNK < 1.1. The high Sr/Y ratio (22 to 56) implies that these granites are adakitic. The low initial Sr (0.7044 to 0.7055) and positive εNd (t) (+1.46 to +2.70) values indicate that the protolith of the Rutog granites originated mainly from a depleted source. We attribute the Rutog plutonism to the development of an oceanic arc during the continuing northward subduction of the BNO and propose that the Rutog adakitic granites were formed by melting of the subducted BNO crust with limited crustal contamination. Copyright © 2013 John Wiley & Sons, Ltd.

show abstract

U–Pb zircon age, geochemical and Sr–Nd isotopic data as constraints on the petrogenesis and emplacement time of andesites from Gerze, southern Qiangtang Block, northern Tibet

Cited by 44 publications

References 27 publications

Underplating of basaltic magmas and crustal growth in a continental arc: Evidence from Late Mesozoic intermediate–felsic intrusive rocks in southern Qiangtang, central Tibet

Underplating of basaltic magmas and crustal growth in a continental arc: Evidence from Late Mesozoic intermediate–felsic intrusive rocks in southern Qiangtang, central Tibet

Andesitic crustal growth via mélange partial melting: Evidence from Early Cretaceous arc dioritic/andesitic rocks in southern Qiangtang, central Tibet

Subduction of the Bangong-Nujiang Ocean: constraints from granites in the Bangong Co area, Tibet

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