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- W2614056815 endingPage "470" @default.
- W2614056815 startingPage "459" @default.
- W2614056815 abstract "The Early Cretaceous granitoids that are widespread in the Tengchong terrane of Southwest China play a critical role in understanding the tectonic framework associated with the Tethyan oceans. In this study, we present a detailed description of zircon U–Pb ages, whole-rock geochemistry and Hf isotopes for the Laoxiangkeng pluton in the eastern Tengchong terrane and elucidate their petrogenesis and geodynamic implications. Zircon U–Pb dating of the Laoxiangkeng pluton yields ages of 114 ± 1 Ma and 115 ± 1 Ma, which imply an Early Cretaceous magmatic event. The Laoxiangkeng pluton enriched in Si and Na, is calc-alkaline and metaluminous, and has the characteristics of highly fractionated I-type granites. Zircons from the pluton have calculated εHf(t) values of −12.7 to −3.7 and two-stage model ages of 1327–1974 Ma, respectively, indicating a mixed source of partial melting of Paleo-Neoproterozoic crust-derived compositions with some inputs of mantle-derived magmas. By integrating all available data for the regional tectonic evolution of the eastern Tethys tectonic domain, we conclude that the Early Cretaceous magmatism in the Tengchong terrane was produced by the northeastward subduction of the Meso-Tethyan Bangong–Nujiang Ocean." @default.
- W2614056815 created "2017-05-19" @default.
- W2614056815 creator A5022741152 @default.
- W2614056815 creator A5024999450 @default.
- W2614056815 creator A5025234966 @default.
- W2614056815 creator A5030879600 @default.
- W2614056815 creator A5056694937 @default.
- W2614056815 creator A5062346307 @default.
- W2614056815 date "2018-03-01" @default.
- W2614056815 modified "2023-10-10" @default.
- W2614056815 title "Early Cretaceous I-type granites in the Tengchong terrane: New constraints on the late Mesozoic tectonic evolution of southwestern China" @default.
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- W2614056815 doi "https://doi.org/10.1016/j.gsf.2017.04.007" @default.