根据最新测量获得的青藏高原中西部航磁异常图 ,经不同高度向上延拓后 ,发现在测区东部 ,即青藏高原中部自柴达木向西南延伸的广大地区 ,出现一条极为明显的北北东向负磁异常带。从对航磁区域场的分析 ,并结合人工地震、重力计算莫霍面深度、热水活动、最新火山岩活动、地貌特征和天然地震活动等多种资料的解释 ,认为负异常带是由于深部热流沿北北东向上升引起局部岩浆熔融 ,使上地壳下部具有较高的地温 ,导致磁性层底部消磁作用的结果。与此同时也加快了青藏高原隆升的幅度 ,为高原形成和演化的研究提供了新的证据 According to the latest aeromagnetic anomaly maps of central and western Qinghai-Tibet Plateau obtained from the latest surveys, after upward extension at different heights, it is found that in the vast area in the east of the survey area, that is, the central part of the Qinghai-Tibet Plateau extends southwestwards from Qaidam, an extremely obvious north- East negative magnetic anomaly band. Based on the analysis of the aeromagnetic domain and the interpretation of various data such as the depth of the Moho, the activity of the hot water, the latest volcanic activity, the geomorphic features and the natural seismicity, the negative anomalous zone is considered to be due to the deep heat flow The north-north eastward rise causes the local magma to melt, resulting in a higher ground temperature in the lower part of the upper crust, resulting in the demagnetization at the bottom of the magnetic layer. At the same time, it also speeds up the uplift of the Qinghai-Tibet Plateau and provides new evidence for the study of plateau formation and evolution