Two-stage Cenozoic extension in the North Qinling range-Weihe graben: recorded in apatite fission tr

• 作 者: Jianhui Liu Peizhen Zhang Richard O.Lease Dewen Zheng Jinglin Wan Weitao Wang Huiping Zhang
• 机 构: Institute of Geology Chinese Academy of Geological Sciences,Beijing 100037,China
• 出 处: 第五届构造地质与地球动力学学术研讨会
• 发表日期: 2012年9期
• 关键词: fission track thermochronology the North Qinling Range the Weihe basin extension

　　Intracontinental extension in central China is accommodated by Cenzoic grabens flanking the Ordos Block,such as the Weihe graben,which accommodate 5-6 mm/yr of extension.To define the onset and evolution of major Cenozoic extension,we examine the cooling history of exhumed footwall rocks in the North Qinling range adjacent to the Weihe graben.We present results from 47 new apatite fission track (AFT) samples – primarily from two vertical transects of 1.5-2.5 km relief located on the northern flank of the North Qinling footwall.