Abstract: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 206 Pb/ 238 U 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 SiO 2 (65.01%-67.31%), A1 2 O 3 (17.17%-18.05%) and Na 2 O (Na 2 O/K 2 O=1.67-1.87) but low Mg # contents calculated as 1… Show more
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