• 责任者：Dang Jinhua (No.3 Geology and Mineral Exploration Team ; Gansu Provincial Bureau of Geology and Mineral Exploration and Development ; Lanzhou 730000 ; China)
• 刊名：Gansu Geology
• 出版年：2011
• 卷期：20(2)
• 关键词：花岗岩 ; granite ; 祁连山 ; Qilian Mountains
• 页码：p.40-44
• 图表：5 illus., 3 tables, 14 refs.
• 分类号：0801
• issnNo：ISSN1004-4116
• isbnNo：CN 62-1191/P

Jinfosi granite is a larger composite granitoid which has been formed in early Hercynian period. Composed of monzogranite, biotite monzogranite and syenite granite, it has the characteristics of high-K, high-Al, low-alkali, low-Ti. On the REE distribution patterns, Eu appears as a weak anomaly. The plots fall into the section of the post-collisional granites on the Rb-Y-Nb diagram of Peace. The U-Pb zircon age is 345.0 ± 75.0 Ma which represent the Jinfosi granite was formed in the Late Devonian. The rocks should be formed in the post-collisional orogenic period while the continental blocks were continuing to converge after completion of main orogenesis.