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青藏高原自约45Ma前开始隆升以来,经历了多次隆起与夷平的交替过程.基于事实分析和这样一种理论假说:当地磁极性与现代相同时,地球内部对流活动强,造山运动强烈,青藏高原隆起速率大;相反时,地球内部对流活动大为减弱,青藏高原构造抬升速率为零,建立了高原高度随时间变化的微分方程模型.得到了其解析解,并利用古地磁资料和星际氢原子浓度资料计算了自高原隆升以来的高度变迁.对数学模型结果与事实分析结论的比较表明,两者相当一致,该模型较为逼真地再现了地质历史上青藏高原隆升和夷平的交替过程.该模型主要考虑了高原高度对侵蚀速率的影响以及地磁极性和星际氢原子浓度对抬升速率的影响.
Based on the factual analysis and the theoretical hypothesis that the local magnetic polarity is the same as that of the modern time, the convection in the Earth is strong and the orogeny is very strong during the uplift of the Qinghai-Tibet Plateau since about 45 Ma. , And the uplift rate of the Qinghai-Tibet Plateau is large. On the contrary, the convection in the earth is greatly weakened, and the tectonic uplift rate of the Qinghai-Tibet Plateau is zero. A differential equation model of the plateau altitude with time is established. The analytical solution is obtained and the paleomagnetic data and The data of interstellar hydrogen atomic concentration calculated the height change since the uplift of the plateau.The comparison between the results of the mathematical model and the conclusions of fact analysis shows that the two are quite consistent and the model reproduces the uplift and flattening of the Qinghai-Tibetan Plateau in the geological history The model mainly considers the effect of plateau height on erosion rate and the influence of geomagnetic polarity and interstellar hydrogen concentration on the rate of uplift.