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研究表明 ,青藏高原的隆升不仅是印度板块和欧亚板块碰撞的结果 ,它同时受到高原下部地幔物质运移以及地幔和岩石层之间耦合作用的影响。文中以青藏高原隆升三阶段模式(BCCM )为基本模型 ,对在印度板块向北推移、挤压而导致的高原隆升演化的数值模拟结果进行处理。处理中考虑了与抬升过程相应的剥蚀过程 ,同时还考虑在高原演化的后期大约 8～10Ma时发生的下伏岩石层底部的对流搬离 (convectiveremoval)而导致的隆升作用。结果表明 ,模型描述的青藏高原隆升演化过程和观测资料有较好的吻合 ,同时显示高原下部岩石层的对流搬离可能是最近 8～ 10Ma以来高原整体隆升的主导机制。
The study shows that the uplift of the Qinghai-Tibet Plateau is not only the result of the collision between the Indian plate and the Eurasian plate, but also the material migration of the lower mantle and the coupling between the mantle and the rock layer. Based on the BCCM model of the Qinghai-Tibet Plateau uplift, the numerical simulation results of plateau uplift induced by the northward migration and compression of the Indian plate are dealt with. The process considered the ablation process corresponding to the uplift process and also considered the uplift caused by the convective removal at the bottom of the underlying lithosphere that occurred at about 8-10 Ma later in the plateau evolution. The results show that the evolution of the uplift of the Qinghai-Tibet Plateau consistent with the model data shows good agreement with the observed data. It also shows that the convection of the lower lithosphere in the plateau may be the dominant mechanism of the uplifting over the recent 8-10 Ma.