The Nature of the West Junggar Basement:Evidence from Magmatic and Detrital Zircon U-Pb Ages

• 作者: DUAN Fenghao LI Yongjun ZHI Qian YANG Gaoxue
• 来源期刊: 地质学报（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: RESEARCH ADVANCES
• 页码范围: 691-692
• 页数: 2页
• 语种: 英文

摘要

Objective West Junggar,which is located in the southwestern segment of the Central Asian Orogenic Belt(CAOB),is an important tectonic unit in the evaluation and examination of the largest continental accretion on Earth,playing a significant role in understanding the tectonic evolution and crustal growth within the orogenic belt(Xiao and Santosh,2014).However,no precise record of ancient continental blocks is found in West Junggar,owing to the extensive coverage and later structural reconstructions.The question of whether or when West Junggar had a Precambrian crystalline basement is one of the key topics related to the tectonic evolution of the CAOB.In this paper,we report new early Proterozoic ages for zircons from the basalt and tuffaceous sandstone in southern West Junggar,with a view to providing new geochronological data and insights into our understanding of the nature of the West Junggar basement.