【摘要】 青海湖是我国最大的内陆湖泊,目前的水域面积约4400 km2,流域面积约29660 km2。通过在湖内进行高分辨率浅层剖面探测(GeoPulse),发现不同发育阶段的沉积特征在地震剖面上得到很好的反映。Geopulse高分辨率浅层剖面穿透深度约60 m(分辨率为0.5 m),沉积层序在湖盆中央近水平展布,揭示沉积环境相对稳定,但也有局部的扰动或错断。尤其在南部近岸部位,上表层沉积出现弯曲,说明第四纪的晚近期,青海湖有过新的构造运动。更多还原

【Abstract】 Qinghai Lake is the largest inland closed-basin lake in China,with an water area of 4 400 km2 and a drainage area of about 29 660 km2.Based on the geopulse high resolution sub-bottom profile survey,the later quaternary sediment characteristics in the lake are revealed on the sub-bottom profiles clearly.The penetration and resolution of the sub-bottom profiles are 60 m and 0.5 m respectively.The profiles in the basin center present a near level sediment stratum that reveals a stable sedimentary environment of the lake.However,there are also some disturbed sediment layer or small faults in basin boundary,especially,in the south nearshore area of the lake.It suggests that there was neo-tectonic movement in later quaternary in Qinghai lake.更多还原