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Early Cretaceous arc-related volcanic rocks in the northern Great Xing’an Range, NE China: records of Paleo-Pacific ocean subduction by Haina Li; Jun Han; Zhigang Yin is a Earth and Planetary Sciences article available to read on EtoBox.
What is Early Cretaceous arc-related volcanic rocks in the northern Great Xing’an Range, NE China: records of Paleo-Pacific ocean subduction about?
There are widespread Late Mesozoic volcanic rocks in the Great Xing'an Range, Northeast China. However, the precise age data and tectonic evolution are still controversial. In this paper, a suite of intermediate-felsic volcanic rocks and mafic volcanic rocks have been recognized in the Daheishan of the northern Great Xing'an Range. Zircon U-Pb dating constrains two groups of the crystallization ages at 129 Ma (dacite) and 124-127 Ma (rhyolite, rhyodacite and andesite), respectively. They all have magmatic zircon geochemical characteristics, including systematic positive Ce anomalies, weak negative Eu anomalies, and high Th/U ratios (average 0.84). The intermediate-felsic volcanic rocks show crustal signatures with high K 2 O (1.91-7.57 wt% and low MgO (0.19-2.78 wt%) contents. The zircon ε Hf (t) values mostly range from + 4.7 to + 10.2, with dominant two-stage model ages (T DM2 ) of 530-878 Ma. Therefore, combined with previous data, the mantle-derived mafic melts may have triggered partial melting of the juvenile lower crust to produce intermediate-felsic magmas, and the source rock is considered to be an amphibolite. In addition, the trace element data of the volcanic rocks disp
Who reads Early Cretaceous arc-related volcanic rocks in the northern Great Xing’an Range, NE China: records of Paleo-Pacific ocean subduction?
It is typically read by researchers, students, and practitioners in Earth and Planetary Sciences.
- Author
- Haina Li; Jun Han; Zhigang Yin
- Publisher
- Springer Science and Business Media LLC
- Published
- 2021
- Language
- EN
- Field
- Earth and Planetary Sciences (Physical Sciences)