中文摘要：

新生代以来青海南山的隆起过程研究对解析青海湖一共和盆地地区盆地分异演化、现代地貌特征的形成等关乎青藏高原东北部生长的过程与形式等问题，具有重要的指示意义，而且隆起高度的研究为确定古青海湖盆地的范围及其演化过程，提供地质学证据。通过青海南山南侧新生代野外地质调查，发现共和盆地西北部那头沟剖面新近纪地层厚度超过2270m，记录了新近纪以来盆地沉积环境变化及沉积地层构造变形特征。依据地层变形形态及碎屑特征，可划分为生长地层和生长前地层。根据生长前地层变形形态及厚度估算，获得晚上新世以来青海南山的隆起高度在1601～1922m（生长前地层865m，倾角变化为57°～63°）。从剖面起点。沿地层倾向线反方向到青海南山顶部的最大高差为1070m左右，所以，青海南山大部分地区在隆起之前可能低于现在共和盆地底部和青海湖湖面高度。表明，青海南山隆起之前青海湖盆地和共和盆地可能为统一的“古青海湖”盆地。

英文摘要：

Uplift of the Qinghai Nanshan is very important to analyze evolution and modem geomorphic feature of the Lake Qinghai--Gonghe basin region. Its height may define the range and evolution of the paleo-Lake Qinghai. Geological explorations in southern side of the Qinghai Nanshan show that thickness of Neogene in this region is more than 2270 m. It recorded the regional deformation and environmental changes in this area. According strata attitude and clastic composition, the strata can be divided into growth strata and pre-growth strata. Estimated height uplifted was 1601 - 1922 m on the basement of stratigraphic dips of the pre-growth strata. The height difference between the start site of the section and summit of Qinghai Nanshan is about 1070 m. So, most areas of the Qinghai Nanshan were lower than basement of the Gonghe Basin and level of the Lake Qinghai before the uplift of the Qinghai Nanshan since Pliocene. This result suggests that the Gonghe Basin and the Lake Qinghai Basin perhaps composed one big ＂paleo-Lake Qinghai＂ Basin in late Miocene.