• 责任者：Shi Yu (State Key Laboratory of Mineral Deposits Research ; School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Yu Jinhai
• 刊名：Acta Petrologica Sinica
• 出版年：2011
• 卷期：27(10)
• 关键词：片麻岩 ; gneisses ; 太华群 ; Taihua Group ; 铀—铅计时 ; U-Pb dating ; 秦岭 ; Qinling Mountains
• 页码：p.3095-3108
• 图表：6 illus., 5 tables, 76 refs.
• 分类号：0802
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

///This paper presents new geochemical, LA-ICPMS U-Pb zircon dating and LA-MC-ICPMS zircon Hf isotopic results for a biotite plagioclase gneiss from the Taihua Group at the south of Huashan pluton, Shaanxi Province. Geochemical results indicate that the protolith is intermediate-acidic calc-alkaline granitic rock, with low REE content (∑REE=83.13×10^-6) and high Pb and LILE element contents (e.g.Rb, Ba). The ¹⁷⁶Hf/¹⁷⁷Hf ratio of zircons from this sample varies from 0.281 258 to 0.281 404 with obviously negative εHf (t) values (-6.86~-11.23). The Hf model ages vary from 2.96 to 3.24 Ga, indicating that the original magma of the protolith derived from Mesoarchean crust.