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Glacial Geomorphology and Glaciations at the Headwaters of the rümqi River,Tianshan Mountains,China:Review and Prospect

ZHAO Jing-dong1,SHI Ya-feng1,2,LI Zhong-qin1(1.State Key laboratory of Cryospheric Sciences,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences,Lanzhou Gansu 730000,China;2.Nanjing Institute of Geography & Limnology,Chinese Academy of Sciences,Nanjing Jiangsu 210008,China)  
The rümqi River originates from the northern slopes of the Kelawucheng Mountains,northern range of the eastern segment of the Tianshan Mountains,China.Glacial erosional and depositional landforms were well-preserved at the headwaters of the rümqi River.These landforms contain considerable information about the changes of the ancient glaciers and indicate that there are multiple Quaternary glaciations in this drainage.With the hard working by many scholars in the past five decades,several conclusions have been drawn: 1) Based on the principle of glaciology and sedimentology,geomorphology and distribution and characteristics of the Quaternary glacial landforms and sediments have been investigated,the glacial and non-glacial sediments have been studied.2) Based on the results of dating,such as traditional 14C,accelerator mass spectrometry 14C,lichenometry,thermoluminescence,electron spin resonance,cosmogenic radionuclide(10Be),and considering the principle of geomorphology and stratigraphy,the Little Ice Age,Neoglaciation,Last Glaciation(MIS 2~4),and glaciations corresponding to MIS 6 and MIS 12 have been confirmed.A typical case of the Quaternary glaciations in China has been established.Reviewing the past and prospecting the future,it is suggested that more studies on the paleoenvironment reconstruction and glacial landforms modeling should be done.The glacial landforms on the southern slopes of the Kelawucheng Mountains should be determined synthetically.Referring the Quaternary glacial revolution in this drainage,the relationship between the glacier development and the tectonic uplift of the Tianshan Mountains should be further study.In addition,it should be emphasized in the future study that the glaciers developed in the eastern,middle and western segments of Tianshan Mountains in synchronicity or not and were there the older glaciations in Tianshan Mountains?
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