太白山第四纪冰川地貌演化与年代学研究

得益于CRN、OSL、ESR等测年手段在冰川年代学的发展与应用，第四纪冰川研究已经进入了以技术定年为特征的关键时期。秦岭为我国南北的天然屏障和连接东西的纽带，地理位置极为重要和特殊，其主峰太白山在第四纪期间发育过明显的冰川作用，且保留了形态清晰的冰川侵蚀和堆积地貌，是重建古冰川序列和恢复冰川地貌演化过程，特别是验证青藏高原及周边冰川发育机制—构造和气候耦合模式的理想场所。本项目将运用OSL、ESR、CRN等技术测年手段对太白山典型冰川沉积进行年代学研究，重点找寻MIS3/4的冰进证据。本研究确定的太白山古冰川序列、性质和规模，能够恢复冰川地貌的演化过程，结合该区其他气候记录，并广泛对比周边其他山地，尝试构建青藏高原东缘冰川演化的时空模式。

Thanks to new dating techniques, such as cosmogenic radionuclides (CRN), optically stimulated luminescence (OSL) and electron spin resonance (ESR) have been developed and refined in glacial chronology, Quaternary glaciations research in China has entered a crucial period with the characteristics of dating technology. Qinling mountain range is a natural barrier of Chinese north-south, also the link that connecting the east-west, the geographical position is extremely important and special. During the Quaternary period, Taibai Mountain has developed obvious glaciations, and retained lots of clear glacial erosion and accumulation landforms. It’s a ideal place to reconstruct ancient glacial sequence and recover glacier landforms evolution, especially to verity the Tibetan Plateau and surrounding mountains’ glacier development mechanism-tectonic and climate coupled model. This project will use OSL、ESR、CRN dating techniques to research chronology with typical glacial deposits in Taibai Mountain, and the key is finding MIS3/4 evidence of glacial advance. This study determined the Taibai Mountain ancient glacial sequence, nature and scale, it can recover glacier landforms evolution. Combined with other climate records for this area, and extensive contrast surrounding the other mountains, we will try to construct the temporal and spatial patterns of glacier evolution in the eastern margin of the Tibetan Plateau.