Detrital Zircon LA-ICP-MS Ages of Tertiary Sandstones from Western Qaidam Basin： Constraints on the Uplift of Altun Mountains

详细信息   

• 责任者：Zhou Hai (State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Chen Liang
• 刊名：Acta Geologica Sinica
• 出版年：2012
• 卷期：86(6)
• 关键词：隆起 ; uplifts ; 碎屑 ; clasts ; 铀—铅计时 ; U-Pb dating ; 柴达木盆地 ; Qaidam Basin ; 阿尔金山 ; Altun Mountains
• 页码：p.906-922
• 图表：8 illus., 1 table, 35 refs.
• 分类号：0300
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

摘要

 
    

The Altun Mountains is a collisional orogenic belt strongly modified by strike-slip-faults, constituting the current northern tectonic boundary of Qinghai-Tibetan Plateau. Its uplift is remarkable part of the Cenozoic uplift of Qinghai-Tibetan Plateau. This contribution presents LA-ICP-MS U-Pb dating results of detrital zircons, together with heavy mineral assemblages from sandstones of the Xiaganchaigou Formation and lower segment of the Xiayoushashan Formation from northwest Qaidam Basin. The results show that there are significant Indosinian and Caledonian age populations in all samples. However, significant differences in age spectrums exist between the samples from Xiaganchaigou Formation ages and those from Xiayoushashan Formation.