DOI: 10.3724/SP.J.1226.2013.00698

Sciences in Cold and Arid Regions 2013/5:6 PP.698-708

The morphological characteristics of glacial deposits during the Last Glaciation, taking the Parlung Zangbo River Basin as an example

Moraine morphology is a valuable indicator of climate change.The glacial deposits of ten valleys were selected in the Parlung Zangbo River Basin,southeastern Tibetan Plateau,to study the glacial characteristics of the Last Glaciation and the climate change processes as revealed by these moraines.Investigation revealed that a huge moraine ridge was formed by ancient glacier in the Marine Isotope Stage 2(MIS2),and this main moraine ridge indicates the longest sustained and stable climate.There are at least two smaller moraine ridges that are external extensions of or located at the bottom of the main moraine ridge,indicating that the climate of the glacial stage before MIS2 was severer but the duration was relatively shorter.This distribution may reflect the climate of MIS4 or MIS3b.The glacial valleys show multi-channel,small-scale moraine ridges between the contemporary glacial tongue and the main moraine ridge.Some of these multi-channel moraine ridges might be recessional moraine,indicating the significant glacial advance during the Younger Dryas or the Heinrich event.The moraine ridges of the Neoglaciation and the Little Ice Age are near the ends of the contemporary glaciers.Using high-precision system dating,we can fairly well reconstruct the pattern of climate change by studying the shape,extent,and scale characteristics of glacial deposits in southeastern Tibet.This is valuable research to understand the relationship between regional and global climate change.

Key words:Parlung Zangbo River Basin,Last Glaciation,terminal moraine

ReleaseDate:2015-04-17 09:59:10

Chinese Academy of Sciences, Comprehensive Scientific Expedition tothe Qinghai-Xizang Plateau, 1974. Report of the ComprehensiveScientific Expedition to the Qinghai-Xizang Plateau, ExplorationReport of the Geomorphology in Chayu, Bomi and Basu Counties,Southeast Tibet, pp. 11-12.

Chinese Academy of Sciences, Comprehensive Scientific Expedition tothe Qinghai-Xizang Plateau, 1985. Geomorphology of Xizang (Ti-bet). Science Press, Beijing.

Guan ZH, Chen CY, Qu YX, 1984. Rivers and Lakes in Xizang. Sci-ence Press, Beijing.

Hu E, Yi CL, Yi YJ, 2010. Observation and evolution investigationof moraine geomorphology in the Rongbuk Valley of MountQomolangma. Journal of Glaciology and Geocryology, 32:316-324.

Li JJ, Zheng BX, Yang XJ, 1986. Glaciers of Xizang (Tibet). SciencePress, Beijing.

Li YJ, Yi CL, Hu E, 2010. Microlandform in the Rongbuk Valley ofMt. Qomolangma. Journal of Glaciology and Geocryology, 32:696-705.

Mi DS, Xie ZC, Luo XR, Feng QF, Ma MG, Jin DM, 2002. Glacierinventory of China: The Ganga Drainage Basin and the RiverDrainage Basin. Xi’an Cartographic Publishing House, Xi’an.

Owen LA, Finkel RC, Barnard PL, Ma HZ, Asahi K, Caffee MW,Derbyshire E, 2005. Climatic and topographic control on the styleand timing of Late Quaternary glaciation throughout Tibet and theHimalaya defined by 10Be cosmogenic radionuclide surface expo-sure dating. Quaternary Science Reviews, 24: 1391-1411.

Rampino MR, Slep S, 1992. Volcanic winter and accelerated glaciationfollowing the Toba super eruption. Nature, 359: 50-52.

Shi YF, Cui ZJ, Su Z, 2006. The Quaternary Glaciations and Environ-mental Variations in China. Hebei Science and Technology Pub-lishing House, Shijiazhuang.

Shi YF, Huang MH, Yao TD, 2000. Glaciers and Their Environmentsin China: The Present, Past and Future. Science Press, Beijing.

Shi YF, Liu SY, 2000. Estimation on the response of glaciers in Chinato the global warming in the 21st century. Chinese Science Bulletin,45: 668-672.

Shi YF, Yao TD, 2002. MIS3b (54-44 ka B.P.) cold period and glacialadvance in middle and low latitude. Journal of Glaciology and Ge-ocryology, 24: 1-9.

Wang J, 2007. Study on Quaternary Glacial evolution in southeasternTibet and cosmogenic nuclides dating. PhD thesis, Lanzhou Uni-versity, pp. 150.

Wang J, 2010. Glacial advance in the Qinghai-Tibet Plateau and pe-ripheral mountains during the Mid-MIS3. Quaternary Sciences, 30:1055-1065.

Wang XL, 2006. Glacial and climate change in Boduizangbu valley inBaiyu Ice Stage. PhD Thesis, Lanzhou University, pp. 108.

Yang W, Zhou SZ, Wang J, 2005. Formation mechanism of hummockymoraine in the Bodui Zangbo Valley and its environmental signifi-cance. Journal of Glaciology and Geocryology, 27: 220-225.

Yang ZH, Yao TD, Huang CL, Sun WZ, 1997. The Younger Dryasclimate event in Guliya ice core. Chinese Science Bulletin, 429(18):1975-1978.

Zeng QL, Yang ZH, Yuan GX, 2007. Songzong Lake: An ice dammedlake of Last Glacial maximum in Purlung Zangbo River, southeastTibet. Quaternary Sciences, 27: 85-92.

Zhang GL, Pan BT, Wang J, 2010. Research on glacier change in theGongga Mountain based on remote-sensing and GPS from 1966 to2008. Journal of Glaciology and Geocryology, 32(3): 454-460.

Zhao XT, Wu ZH, Zhu DG, Hu DG, 2002. Quaternary glaciations in thewest Nyaiqentanglha Mountains. Quaternary Sciences, 22(5):424-433.

Zhou SZ, Wang J, Xu LB, Wang XL, Colgan PM, Mickelson DM,2010. Glacial advances in southeastern Tibet during late Quater-nary and their implications for climatic changes. Quaternary Inter-national, 218: 58-66.

Zhou SZ, Xu LB, Colgan PM, Mickelson DM, Wang XL, Wang J,Zhong W, 2007. Cosmogenic 10Be dating of Guxiang and BaiyuGlaciations. Chinese Science Bulletin, 52: 1387-1393.