地质通报2013，Vol.32Issue(1)：75-85,11.
青藏高原腹地班戈—双湖一带晚新生代伸展构造及动力学机制
Late Cenozoic extension structure in Baingoin-Shuanghu area of central Tibet and its dynamic mechanism
摘要
Abstract
In central Tibetan Plateau, besides the NS-tranding extension structure after late Cenozoic, a series of nearly EW-striking extension structures, controlled by EW-trending normal faults, were found during the field work. Geomorphology was characterized by the parallel-relief valleys separated by the relatively narrow ridges and the rift-ridge landform. The DEM analysis shows that the EW-tranding extension structure cutting the NS-trending Shuanghu basin in the study area. Studies of the fault kinematics, chronology and sedimentation in the fault-controlled basin suggest that the activity of the EW-trending normal faults began in the Miocene and these faults were probably developed alternately with the NS-trending extension structure. Furthermore, with the increasing of the elevation of central Tibetan Plateau, the activity of the EW-trending faults were obviously strengthened in Quaternary. The gravity action on the high-standing plateau resulted in the development of grabens in different directions.关键词
青藏高原腹地/晚新生代/伸展构造/槽梁地貌Key words
central Tibet/ Late Cenozoic/ extension structure/ rift-ridge landform分类
天文与地球科学引用本文复制引用
申添毅,王国灿..青藏高原腹地班戈—双湖一带晚新生代伸展构造及动力学机制[J].地质通报,2013,32(1):75-85,11.基金项目
中国地质调查局国家青藏专项项目《青藏高原新近纪隆升过程与地质事件群研究》(编号:1212011121261)、国家自然科学基金项目《重大地质突变期生物与环境协同演化》(批准号:40921062) （编号:1212011121261）
