青海湖属南祁連山东端的一个山間盆地。根据作者对湖区第四系、地貌和新构造的研究,确定青海湖形成于早—中更新世,閉塞于晚更新世,并于全新世开始了咸化;它是一个受断块差异升降运动控制,且与第四紀冰川活动有紧密联系的新构造断陷湖。青海湖 Qinghai Lake is a mountain basin in the eastern end of South Qilian Mountains. According to the author’s research on Quaternary, landform and neotectonics in the lake area, it was confirmed that Qinghai Lake formed in the early-middle Pleistocene and occluded in the late Pleistocene and started salinization in the Holocene. Controlled, and with the Quaternary glacial activities are closely linked to the new tectonic rift lake. Qinghai Lake