Tectono-magmatic evolution of the Gaoligong belt, southeastern margin of the Tibetan plateau: Constraints from granitic gneisses and granitoid intrusions

Zhao, Shichao; Lai, Shaocong; Qin, Jiangfeng; Zhu, Rixiang

doi:10.1016/j.gr.2015.05.007

Cited by 65 publications

(27 citation statements)

References 73 publications

(59 reference statements)

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“…An active continental margin setting related to subduction of the Neo‐Tethyan Ocean has been adopted to interpret the Late Mesozoic–Cenozoic magmatic arc in the STTD, namely, the Transhimalayan magmatic belt (Wang et al, ; Zhao et al, ). The Tengchong terrane, located in the southern segment of the Transhimalayan magmatic belt, contains numerous granitic rocks of I‐, S‐, and A‐types that provide keys for understanding the Late Mesozoic–Cenozoic magmatic activity and tectonic evolution.…”

Section: Discussionmentioning

confidence: 99%

“…, ; Zhao et al . , ) and the Eocene magmatism generated I‐ and A‐type granites with mafic–ultramafic rocks in the Tengchong terrane (Cao, Pei, et al, ; Richards, ; Wang et al . , ; Xie et al .…”

Section: Discussionmentioning

confidence: 99%

“…, ; Zhao et al . , ; Zhao, Lai, Qin, Zhu, & Wang, ), and (d) Early Paleocene–Eocene (65–40 Ma; Cao, Pei et al, ; Chen, Hu et al . , ; Lin et al .…”

Section: Geological Backgroundmentioning

confidence: 99%

“…, ; Song et al . , ; Zhao, Lai, Qin, & Zhu, ), (b) Early Cretaceous (130–110 Ma; Cao et al, ; Cao, Zhang, et al, ; Chiu et al . , ; Xie et al .…”

Section: Geological Backgroundmentioning

confidence: 99%

“…, ; Lin, Peng, Qiao, & Li, ; Liu et al, ; Ma et al . , , ; Qi et al, ; Tan, Zhao, Li, Xu, & Zhang, ; Wang et al, , Wang et al, 2014b; Wang et al, ; Xie et al, , ; Xu et al, , ; Yang, Xu, Huang, Luo, & Shi, ; Zhao et al, , , ; Zhou, Qi, Hu, Bi, & Meng, ; Zhu, Wang et al, ; Zou, Mao, Zou, Lin et al, , Zou, Mao, Zou, Mao et al, [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Introductionmentioning

confidence: 99%

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Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

et al. 2017

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New data from mineralogy, geochemistry, zircon U–Pb dating, and Hf isotopes have revealed Late Cretaceous to Eocene magmatic intrusions in the Tengchong terrane and constrained the origin, tectonic setting, and characteristics of tin‐bearing and barren granitoids. We divide the studied granitoids into two groups: (a) the Late Cretaceous Zhinaxiang (70 Ma) and Early Paleocene Dazhupeng (65 Ma) S‐type barren granites and (b) the Eocene Lailishan A2‐type tin‐bearing granite (50 Ma). All these granitoids display Si‐ and K‐rich and calc‐alkaline characteristics and have similar chondrite‐normalized rare earth element patterns. However, geochemical differences do exist between the two groups of granites. The Zhinaxiang and Dazhupeng S‐type granites are slightly peraluminous, enriched in large‐ion lithophile elements (e.g., Rb and K), and depleted in high‐field‐strength elements (e.g., Nb, Ta, Zr, and Hf), whereas the Lailishan A2‐type granite has higher TFe2O3, high‐field‐strength element content, and Ga/Al ratios. The geochemical and Hf isotopic data indicate that the granites in this study were generated by partial melting of Paleoproterozoic metasedimentary rocks. Due to the subduction of the Neo‐Tethyan Ocean beneath the Eurasian plate, the Zhinaxiang and Dazhupeng S‐type granites were formed in a thickened‐crustal environment, whereas the Lailishan A2‐type granite was emplaced in a post‐collisional extensional setting attributed to slab break‐off. By comparison between tin‐bearing and barren granites, we propose that the Sn mineralization could be related to relatively high‐temperature and low‐pressure crystallization conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…, ; Zhao et al . , ; Zhao, Lai, Qin, Zhu, & Wang, ), and (d) Early Paleocene–Eocene (65–40 Ma; Cao, Pei et al, ; Chen, Hu et al . , ; Lin et al .…”

Section: Geological Backgroundmentioning

confidence: 99%

“…, ; Song et al . , ; Zhao, Lai, Qin, & Zhu, ), (b) Early Cretaceous (130–110 Ma; Cao et al, ; Cao, Zhang, et al, ; Chiu et al . , ; Xie et al .…”

Section: Geological Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

et al. 2017

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Cambrian magmatism in the Tethys Himalaya and implications for the evolution of the Proto‐Tethys along the northern Gondwana margin: A case study and overview

Zhang

Santosh

et al. 2018

Geological Journal

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The Cuonadong Dome in southern Tibet is a newly discovered gneiss dome in the Tethys Himalaya. Here, we investigate the Late Cambrian augen gneiss (orthogneiss) within the core of this dome to address the controversy surrounding early Palaeozoic tectonic evolution of the northern margin of eastern Gondwana. We report new zircon laser ablation multicollector inductively coupled plasma mass spectrometry (LA‐(MC‐)ICP‐MS) U‐Pb ages, Lu‐Hf isotopes, whole‐rock major and trace element geochemistry, and Sr‐Nd‐Pb data on representative samples from the granitic gneiss. The weighted mean of 116 analyses of zircon grains yields an age of 498.2 ± 1.5 Ma (mean square weighted deviation [MSWD] = 1.2). Forty‐one spots analyses on these grains show consistent εHf (t) values of −2 to +4 (average = +1.1), corresponding to Hf crustal model age (TDM2) of 1.3 to 1.6 Ga (average = 1.39 Ga). The orthogneiss (metagranite) is characterized by high Si and K contents, with low Al, Mg, and Ti, and A/CNK values ranging from 0.87 to 0.98 with an average of 0.92, indicating a metaluminous composition and I‐type granitoid affinity. The granitoid displays significant enrichment in light rare earth elements (LREEs) and relatively flat high rare earth element (HREE) patterns, with strong negative Eu anomalies (Eu/Eu* = 0.26–0.31). The primitive mantle‐normalized trace elements show a relative enrichment in large‐ion lithophile elements, such as Rb, and high‐field strength elements, such as Th, U, Zr, and Hf, with depletion in Ba, Nb, Ta, Sr, P, and Ti. The rocks show high initial 87Sr/86Sr ratios (0.7221–0.7248) and low εNd (t) values (−8.9 to −7.3) with Nd model ages (TDM) of 1.79–1.91 Ga. Their radiogenic Pb isotopic compositions show (206Pb/204Pb)t = 18.804–19.110, (207Pb/204Pb)t = 15.730–15.768, and (208Pb/204Pb)t = 38.409–39.054, indicating an ancient upper middle continental crustal origin. Our study shows that the protolith of the metagranite was most likely derived from the partial melting of upper continental crust with a minor contribution of depleted mantle materials. Through integration of the regional information on early Palaeozoic magmatism and metamorphic events, we contend that the protolith of the Cuonadong granitic gneiss formed in an accretionary setting associated with the early Palaeozoic Proto‐Tethys Oceanic plate subduction beneath the Gondwana continent.

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Petrogenesis of microgranitoid enclaves and their host granites: The example of Late Cretaceous Guyong pluton in Tengchong Block, SW China

et al. 2021

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Granitoids and their hosted microgranitoid enclaves (MEs) can provide crucial information in understanding the evolution of granitoids and continental crustal growth.The Guyong pluton in central Tengchong Block is mainly composed of monzogranites and abundant coeval MEs (76 Ma). This study reports their petrological, geochemical, and Sr-Nd, zircon U-Pb, and Lu-Hf-O isotopic features to shed light on their petrogenesis and the evolution of the Neo-Tethys. The Guyong MEs have low SiO 2 (56.88-69.61 wt%) and high MgO (1.04-3.91 wt%) contents. They have typical igneous textures and are characterized by similar mineral assemblages, chondritenormalized rare earth element diagrams, and Sr-Nd and zircon Hf-O isotopic compositions (ε Hf (t) of À9.0 to À2.3, δ 18 O of 6.57-8.07) with their host monzogranites, indicating that they are cognate. The acicular apatite and fine-grained texture and geochemical characteristics suggest that the MEs were generated in a rapid cooling and crystallization process at the margin of magma conduit. The Guyong monzogranites have high SiO 2 contents (70.79-74.24 wt%) and low MgO contents (0.24-0.78 wt%). They are calc-alkalic and weakly peraluminous and show characteristics of I-type granites. The geochemical and isotopic compositions of the Guyong monzogranites and MEs suggest that they were produced by partial melting of the metasedimentary and meta-igneous rocks from the Proterozoic Gaoligong metamorphic complex. The Late Cretaceous magmatism in the central Tengchong Block is correlated with the northward subduction of the Neo-Tethys.

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Tectono-magmatic evolution of the Gaoligong belt, southeastern margin of the Tibetan plateau: Constraints from granitic gneisses and granitoid intrusions

Cited by 65 publications

References 73 publications

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

Cambrian magmatism in the Tethys Himalaya and implications for the evolution of the Proto‐Tethys along the northern Gondwana margin: A case study and overview

Petrogenesis of microgranitoid enclaves and their host granites: The example of Late Cretaceous Guyong pluton in Tengchong Block, SW China

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