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The Liuyuan area, which is located on the southern margin of the Beishan orogenic belt, develops abundant Early Paleozic granitoids. SHRIMP zircon U-Pb dating yielded a weighted mean 206Pb/238U age of 421±8 Ma for the Liuyuan granodiorite (Zhao Zehui et al., 2007), implying its Late Silurian intrusion. Geochemical compositions showed that the Liuyuan granodiorite is characterized by high SiO2 (65...
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