Detrital Zircon U-Pb Dating from Tiekelike of Southwestern Tarim Basin: Implications for The Age and Composition of Bochatetag Formation

详细信息   

• 责任者：Wang Chao (Xi’an Center of Geological Survey ; China Geological Survey ; Xi’an 710054 ; China) ; He Shiping
• 刊名：Geological Bulletin of China
• 出版年：2012
• 卷期：31(8)
• 关键词：南华纪 ; Nanhua Period ; 塔里木盆地 ; Tarim Basin
• 页码：p.1233-1243
• 图表：5 illus., 1 table, 12 refs.
• 分类号：1200
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

摘要

The Bochatetag Formation outcrops at Tiekelike on the southwestern margin of the Tarim Craton. The sedimentary rocks of the formation contain conglomerate and shallow-marine carbonatite. Previous researchers assigned its formation age to Mesoproterozoic Jixian System. Detrital zircons in conglomerate on the base of the Bochatetag Formation yielded U-Pb ages ranging from 2.3 to 1.9 Ga, with the youngest detrital zircon concordant age being 1953 Ma. Therefore, the composition and age of the Bochatetag Formation should be redefined. The carbonatite constitutes the main composition of the formation and its formation age should be of the Nanhua system. The concordant age of 772 Ma represents the maximum deposition age.hemas-microsoft-com:office:office" />