The Late Triassic Dengfuxian A-type granite, Hunan Province: age, petrogenesis, and implications for understanding the late Indosinian tectonic transition in South China
| Autor: | Rongqing Zhang, Hui Huang, Huaifeng Zhang, Dongsheng Ma, Yang Cai, Jianjun Lu |
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| Rok vydání: | 2015 |
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| Zdroj: | International Geology Review. 57:428-445 |
| ISSN: | 1938-2839 0020-6814 |
| DOI: | 10.1080/00206814.2015.1012565 |
| Popis: | The Triassic (Indosinian) granites in the South China Block (SCB) have important tectonic significance for understanding the evolution of Eastern Asia. The Dengfuxian biotite granite in eastern Hunan Province, China, reported in this article, was recognized as Late Triassic (late Indosinian) weakly peraluminous A-type granite with a zircon laser ablation inductively coupled plasma mass spectrometry U–Pb age of 225.7 ± 1.6 Ma. It is enriched in F, Cs, Rb, Th, high field strength elements, and rare earth elements (REEs) and depleted in Ba, Sr, P, Ti, Nb, and Ta, with high Ga/Al ratios and zircon saturation temperatures. The Dengfuxian biotite granite shows high initial Sr isotope values (0.715932 to 0.716499) and negative ɛNd(t) (−10.46 to −9.67) and ɛHf(t) (−9.92 to −6.29) values, corresponding to the Nd model ages of 1.79 to 1.85 Ga and the Hf model ages of 1.65 to 1.88 Ga. It is proposed that the Dengfuxian biotite granite was derived from high-temperature partial melting of the Palaeoproterozoic lower c... |
| Databáze: | OpenAIRE |
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