• 责任者：Yu Shengyao (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhang Jianxin
• 刊名：Acta Petrologica Sinica
• 出版年：2011
• 卷期：27(11)
• 关键词：缝合带 ; suture zones ; 岩浆活动 ; igneous activity ; 造山运动 ; orogeny ; 柴达木盆地 ; Qaidam Basin
• 页码：p.3335-3349
• 图表：10 illus., 4 tables, 71 refs.
• 分类号：0300
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

In this paper, the authors report the geochemical, zircon U-Pb dating and Hf isotopic data for tonalite and granite from Dulan area, the North Qaidam Mountains. In combination with the high εHf(t) values (3.3～10.7) and young crustal model age of 732～1 207 Ma, the tonalite was suggested to derived from partial melting of thickened basaltic lower crust. Zircon U-Pb dating result indicates that the granite was emplaced at 382～391 Ma, and the granite shows geochemical character similar to S-type granite as followings: 1) high SiO₂ and K₂O, and low MgO, with K₂O/Na₂O values greater than 1.0; 2) peraluminous with A/CNK greater than 1.0; 3) slightly partition between LREE and HREE (La/Yb)_N=2.22～9.62, with negative Eu anomalies ranging from 0.27 to 0.81; and 4) strongly depleted in Nb, Ta, Sr and Ti, and slightly depleted in Ba.