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Quaternary Glaciation and Glacier Evolution in the Yulong Mount, Yunan

ZHENG Ben-xing (Lanzhou Institute of Glaciology and Geocryology, CAS, Lanzhou Gansu 730000, China)  
The Yulong Mount is Located in 27°10', -27°40' N, 100°09'-100°20' E. It is the southmost snow-covered mountain in China and the southmost maritime glacier in the Eurasia. Its main peak (Sien-Tzn-Tou ) is 5596 m a.s.l.. There are 19 glaciers in the mount area with an area of 1 1.61 km~2, whose meltwater flows into the Jingsha River. Outside the glacier there are many relics of ancient glaciers, that can be divided into three Pleistocene glaciations, i.e., Dali, Lijiang and Yushaping ice age, equivalent to the Wurm, Riss and Mindel in the Alps. The Lijiang ice age was the biggest, when the Baishui River Glacier was 11 km long, with terminus at 2 860 m a.s.l., Lower than the margin (3100-3200 m a.s.l.) of the peidont glacier in the Yunshaping ice age and 2.5 km longer than that in the last glacial maximum of Dan ice age. The glacier evolution in the Yulong Mount is the same as in the Main Mount and the east slope of the Gongga Mountains, those all belong to the Southeast Tibet type but different to those in many highmountains in the Qignhai-Tibetan Plateau. In Yulong Mount the uplift age and height as well as climate condition are different from the interior plateau. Resently, the glaciers are changing slightly. They had retreated about 100 ~ 150 m and their termini had rosen about 50 m from 1982 to 1998, while during 1997-1998 the Baishui Glacier was advancing a little.
【Fund】: 中国科学院兰州冰川冻土研究所课题!931114
【CateGory Index】: P343.6 
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