Geochronology and Geochemistry of Granite Pluton in the North of Qiaowan, Beishan Mountain, Gansu Province, China, and Its Geological Significance

详细信息   

• 责任者：Feng Jicheng (Key Laboratory of Orogenic Belts and Crustal Evolution ; MOE ; School of Earth and Space Sciences ; Peking University ; Beijing 100871 ; China) ; Zhang Wen
• 刊名：Acta Scientiarum Naturalium Universitatis Pekinensis
• 出版年：2012
• 卷期：48(1)
• 关键词：花岗岩 ; granite ; 甘肃 ; Gansu Province
• 页码：p.61-70
• 图表：8 illus., 4 tables, 51 refs.
• 分类号：0801
• issnNo：ISSN0479-8023
• isbnNo：CN11-2442/N

摘要

 
    

To deepen the understanding on tectonic evolution of Beishan Moutain, granite pluton which lies in the north of Qiaowan, northern margin of Dunhuang block (south belt of Beishan Mountain), Gansu Province, is studied in geochronology and geochemistry. From the εH_f(t), εN_d(t) values and geochemical characteristics, it can be concluded that the pluton is a mixture of crustal and mantle derived magma. Based on regional geology and the geochemical characteristics, the hornblende granite pluton in the north of Qiaowan was formed during post-collision period, which suggests the collision of Beishan Mountain is already finished in Late Carboniferous.