Zircon U–Pb ages and Hf isotopes of the Huai’an gneisses from the Tianzhen-Xinpingbu area: Implications for the tectonic evolution of the Trans-North China Orogen

Zhao, Dingyi; Sun, Min; Ding, Anyang

doi:10.1016/j.precamres.2019.105530

Cited by 10 publications

(2 citation statements)

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“…The collision and peak metamorphism in the TNCO are considered to have occurred at 1.85 Ga (Zhang et al, 2009;Zhao et al, 2005;Zhao et al, 2020) or 1.97-1.90 Ga (Feng et al, 2022;Lu et al, 2020;Peng et al, 2023;Qian et al, 2013Qian et al, , 2015Qian et al, , 2019Qian & Wei, 2016;Tang et al, 2017Tang et al, , 2022Xiao et al, 2017Xiao et al, , 2019Zhang et al, 2018;Zhao et al, 2017). Qian et al (2015) Therefore, in combination with available geochronological data and phase equilibrium modelling results, we propose that crustal thickening and peak metamorphism associated with orogenic processes in the TNCO occurred at 1.97-1.90 Ga.…”

Section: Metamorphic Age and Tectonic Implicationmentioning

confidence: 84%

“…However, the collision event that resulted in the final amalgamation of the East and West Blocks along the TNCO remains equivocal. The collision and peak metamorphism in the TNCO are considered to have occurred at ~1.85 Ga (Zhang et al, 2009; Zhao et al, 2005; Zhao et al, 2020) or 1.97–1.90 Ga (Feng et al, 2022; Lu et al, 2020; Peng et al, 2023; Qian et al, 2013, 2015, 2019; Qian & Wei, 2016; Tang et al, 2017, 2022; Xiao et al, 2017, 2019; Zhang et al, 2018; Zhao et al, 2017). Qian et al (2015) reported metamorphic age of ~1.96 Ga in the Hengshan Complex.…”

Section: Discussionmentioning

confidence: 99%

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Metamorphic evolution of garnet amphibolites from the Fuping Complex: Implications for the Paleoproterozoic subduction–collision history of the Trans‐North China Orogen

Wang,

Tang,

Santosh

et al. 2023

Geological Journal

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The Trans‐North China Orogen (TNCO) is a major Palaeoproterozoic collisional orogen in the North China Craton and has experienced complex tectonic evolution during the assembly of the Eastern and Western Blocks. The vestiges of subducted oceanic crust preserved in this orogen can be used to gain insights into the subduction–collision process associated with the Palaeoproterozoic orogeny. In this study, we investigate garnet amphibolites from the Wanzi Group in the Fuping Complex along the TNCO through integrated petrography, mineral chemistry, phase equilibrium modelling and zircon U–Pb geochronology. Three stages of metamorphic mineral assemblages are identified as follows: (i) the prograde assemblage is preserved as plagioclase, amphibole, biotite and quartz inclusions in garnet porphyroblasts; (ii) the peak mineral assemblage includes coarse‐grained amphibole, garnet, plagioclase, ilmenite, biotite and quartz; and (iii) the retrograde assemblage is mainly represented by the corona of amphibole, plagioclase and biotite in the matrix. Petrological features and phase equilibrium modelling define a clockwise pressure–temperature path involving a prograde stage of 7.2–9.6 kbar and <670°C, peak conditions of 10.0–10.2 kbar and 690–810°C, and a retrograde stage with near‐isothermal decompression to ~7.4 kbar and cooling. Zircon U–Pb dating shows weighted mean ages of 1848 ± 22 Ma and 1836 ± 31 Ma, representing the growth of zircon in the retrograde stage during the uplift and cooling process. In combination with available data from the TNCO, the post‐peak decompression and cooling process is inferred to be long‐lived during 1.90–1.76 Ga, following collision along the TNCO that occurred during 1.97–1.90 Ga, ultimately leading to the final assembly of the North China Craton.

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