【摘要】 根据柴达木盆地西部中新世上、下油砂山组的沉积特征及其地震反射界面的特征,推断阿尔金山的主隆升时期为中晚中新世,山体的隆升导致盆地沉积中心向东迁移。盆地周缘山系的隆升年代学资料也表明,青藏高原北缘在中晚中新世发生了快速抬升,与青藏高原南部的同期区域构造事件一致,表明中晚中新世是青藏高原向北生长的重要时期。阿尔金山此次隆升事件与塔里木板块向柴达木地块楔入有关,整个高原的隆升动力源自印度板块与欧亚大陆拼合后持续向北的俯冲。更多还原

【Abstract】 An analysis of sedimentary characteristics of Shangyoushashan and Xiayoushashan Formations and the features of seismic reflection in western Qaidam Basin suggest that the Altyn Mountains were uplifted during the Mid-Late Miocene,which resulted in an eastward migration of the basin depocenter.Uplifting chronological data from the surrounding mountains also indicate that the uplifting of the northern margin of the Qinghai-Tibet Plateau was coincident with the regional tectonic events of southern Qinghai-Tibet Plateau during the Mid-Late Miocene.It is also demonstrated that the Mid-Late Miocene is an important period for the northward growth of Qinghai-Tibet Plateau.The uplift event of the Altyn Mountains was directly related to the wedging of the Tarim Plate underneath the Qaidam Plate.The plateau uplifting dynamic source was derived from the continuous northward subduction of the India Plate after its collision with the Eurasia continent.更多还原