SHRIMP zircon age of the high aeromagnetic anomaly zone in central Tarim Basin and its geological implications

• 作者: Chengze Zhang Guanghui Wu Tailai Qu Yanlong Xu Zhiyong Chen
• 来源期刊: 自然科学期刊(英文)
• 学科: 地球科学
• 关键词: TARIM Plate PRECAMBRIAN BASEMENT SHRIMP U-PB ZIRCON Dating SUPERCONTINENT
• 年，卷（期）: 2012,（1）
• 页码范围: 1-4
• 页数: 4页
• 分类号: P5

摘要

In order to get the correct isotopic age, SHRIMP U-Pb zircon date of Precambrian hornblende granite in Well TD2, located in the central aeromagnetic belt in the eastern of the Tarim basin, was carried out. The result showed a dependable age of 1908.2 ± 8.6 Ma, which demonstrated that the granite pluton is the result of the magmatic activity in early Palaeoproterozoic. It is indicated that the central aeromagnetic belt across Tarim basin, divided it into north and south block, is formed before Neoproterozoic by a large scale tectonothermal events based on the seismic and drilling date. The Tarim continent may have different age and type basements formed the united crystalline basement in Precambrian. This result has yielded new intraplate evidence to constrain the relation between the Tarim plate and the Colombia supercontinent.