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通过对川西安宁河流域中段Ⅰ～Ⅲ级阶地剖面孢粉特征的研究,结合全球气候变化的研究结果,分析安宁河阶地形成时期的气候特征;同时依据安宁河阶地结构特征来综合剖析其阶地的成因.结果表明:川西安宁河流域Ⅰ～Ⅲ级阶地的形成反映了青藏高原构造抬升运动对青藏高原边缘地区的影响,是对青藏高原构造抬升运动的响应;气候变化并非安宁河阶地成因的主要因素,只是起到了调节作用,且不同时期气候对阶地形成的影响程度不同.安宁河河流阶地的研究揭示了青藏高原东缘多次阶段性抬升的事实,有助于探讨高原的隆升机制.
Based on the study of the sporopollen characteristics of the Ⅰ ~ Ⅲ terrace in the middle Anninghe basin of western Sichuan and the research results of the global climate change, the climatic characteristics of the Anning River terrace are analyzed. Meanwhile, the terrains of the Anning River terrace are comprehensively analyzed according to the terrains of the Anning River The results show that the formation of Ⅰ ~ Ⅲ terrace in Anning River Basin in western Sichuan reflects the tectonic uplift of the Tibetan Plateau on the edge of the Qinghai-Tibet Plateau and is the response to the tectonic uplift of the Qinghai-Tibet Plateau. Climate change is not the main cause of the Anning River terrace Only play a regulatory role, and the climatic conditions in different periods have different degrees of influence on terraces.Research on the terraces of Anning River reveals the fact that the eastern edge of the Qinghai-Tibet Plateau is uplifted several times in stages, which is helpful to explore the uplift mechanism of the plateau.