Citation: | Anlu Liu, Lianfu Hai, Jinke Liu, Xiaojun Zhang, Haifeng Li, Fengshun Zhao, Guoliang Zhao, Jinhe Bai. Geochronology, Geochemistry, and Sr-Nd-Hf Isotopes of the Diorite Porphyrites from the Weining Beishan Area, Ningxia Hui Autonomous Region: Constraints on Their Source and Tectonic Implications. Journal of Earth Science, 2024, 35(2): 462-475. doi: 10.1007/s12583-021-1491-2 |
The Weining Beishan area of Ningxia Hui Autonomous Region is located at on the western edge of the Helanshan tectonic belt, which is a tectonic joint among Alxa Block, Ordos Block, and North Qilian orogenic belt. However, the tectonic evolution of this area remains unclear due to the lack of magmatic information. This paper conducted researches on geochronology, geochemistry, and Sr-Nd-Hf isotopes of the diorite porphyrites exposed in the Weining Beishan area. The zircon U-Pb dating yields two ages of 145.0 ± 1.1 and 146.2 ± 1.5 Ma, and the whole-rock geochemical data indicate that the diorite porphyrites are metaluminous to weakly peraluminous and high-K calc-alkaline series. The characteristics of highly initial 87Sr/86Sr ratios (0.708 16 to 0.710 47), negative
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