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Gradual late stage deepening of Gega ice-dammed lake, Tsangpo gorge, southeastern Tibet, indicated by preliminary sedimentary rock magnetic properties

  • Weiming Liu
  • Gordon G. D. Zhou
  • Yonggang Ge
  • Runqiu Huang
Review Article - Solid Earth Sciences

Abstract

Gega lake, in southeastern Tibet, was formed by the blocking of Yarlung Tsangpo gorge by a glacier and is a well-known example of geomorphological damming. However, the evolution of the damming process at the site is still not understood in detail. Here, we use measurements of multiple magnetic parameters of the sediments from the Yusong (YS) 3 section, which is well-dated by optically stimulated luminescence, to provide a detailed history of the late stage of Gega dammed lake since 17.0 ka. Low-frequency field magnetic susceptibility (χlf) increases upwards gradually from 25 to 79 × 10−8 m3/kg above 5.5 m, but other magnetic properties, such as frequency-dependent magnetic susceptibility (χfd % and χfd), susceptibility of anhysteretic remanent magnetization (χARM), and saturation isothermal remanent magnetization (SIRM) did not show a similar degree of enhancement. The magnetic grain size indicators of χARM/χlf, χARM/SIRM, and χlf/SIRM all indicate a trend of increasing magnetic grain size from the 5.5 m to the top of section; however, the bulk sediment grain size decreases gradually within the same interval. The total organic carbon is very low (0.2–0.7%), and thus, it is unlikely that the sedimentary environment is sufficiently strongly reducing to lead to the dissolution of magnetic minerals. Therefore, we infer that the coarsening-upwards of the magnetic grain size, and the increasing magnetic susceptibility from 5.5 m, reflect the gradual preferential preservation of magnetic minerals, caused by the deepening of the lake. Thus, we interpret the magnetic record of the section as reflecting the gradual deepening of the late stage of Gega ice-dammed lake. Last, the abrupt disappearance of the lake may have resulted in an outburst flood.

Keywords

Rock magnetic properties Lake deepening Outburst flood Tsangpo gorge 

Notes

Acknowledgements

We are very grateful to Jan Bloemendal for improving the language. We thank Xiaoyi Fan, Chunjiang Su, and Wenjing Zhang for help in the field. We are also grateful to Xiuming Liu, Bin Lv, and Haitao Wei for laboratory assistance. This research was supported by the Key Research Program of Frontier Sciences, CAS (QYZDB-SSW-DQC010), the National Natural Science Foundation of China (41661144028, 91747207 and 41771023), and the Opening fund of the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology) (SKLGP2016K012).

References

  1. Ao H, Deng C, Dekkers MJ, Liu Q (2010) Magnetic mineral dissolution in Pleistocene fluvio-lacustrine sediments, Nihewan Basin (North China). Earth Planet Sci Lett 292:191–200CrossRefGoogle Scholar
  2. Bloemendal J, King JW, Hall FR, Doh SJ (1992) Rock magnetism of Late Neogene and Pleistocene deep-sea sediments: relationship to sediment source, diagenetic processes, and sediment lithology. J Geophys Res Solid Earth 97:4361–4375CrossRefGoogle Scholar
  3. Chen F, Liu J, Xu Q, Li Y, Chen J, Wei H, Liu Q, Wang Z, Cao X, Zhang S (2013) Environmental magnetic studies of sediment cores from Gonghai Lake: implications for monsoon evolution in North China during the late glacial and Holocene. J Paleolimnol 49:447–464CrossRefGoogle Scholar
  4. Demory F, Oberhänsli H, Nowaczyk NR, Gottschalk M, Wirth R, Naumann R (2005) Detrital input and early diagenesis in sediments from Lake Baikal revealed by rock magnetism. Global Planet Change 46:145–166CrossRefGoogle Scholar
  5. Deng C, Zhu R, Verosub KL, Singer MJ, Vidic NJ (2004) Mineral magnetic properties of loess/paleosol couplets of the central loess plateau of China over the last 1.2 Myr. J Geophys Res 109:B01103.  https://doi.org/10.1029/2003JB002532 CrossRefGoogle Scholar
  6. Dunlop DJ, Özdemir Ö (1997) Rock magnetism: fundamentals and frontiers. Cambridge University Press, CambridgeCrossRefGoogle Scholar
  7. Evans ME, Heller F (2003) Environmental magnetism: principles and applications of enviromagnetics. Academic, AmsterdamGoogle Scholar
  8. Finnegan NJ, Hallet B, Montgomery DR, Zeitler PK, Stone JO, Anders AM, Liu Y (2008) Coupling of rock uplift and river incision in the Namche Barwa-Gyala Peri massif, Tibet. Geol Soc Am Bull 120:142–155CrossRefGoogle Scholar
  9. Huang S-Y, Chen Y-G, Burr GS, Jaiswal MK, Lin YN, Yin G, Liu J, Zhao S, Cao Z (2014) Late Pleistocene sedimentary history of multiple glacially dammed lake episodes along the Yarlung-Tsangpo river, southeast Tibet. Quat Res 82:430–440CrossRefGoogle Scholar
  10. Hunt CP, Banerjee SK, Han J, Solheid PA, Oches E, Sun W, Liu T (1995) Rock-magnetic proxies of climate change in the loess-palaeosol sequences of the western Loess Plateau of China. Geophys J Int 123:232–244CrossRefGoogle Scholar
  11. King JW, Channell JET (1991) Sedimentary magnetism, environmental magnetism and magnetostratigraphy. Rev Geophys 29:358–370CrossRefGoogle Scholar
  12. King J, Banerjee SK, Marvin J, Özdemir Ö (1982) A comparison of different magnetic methods for determining the relative grain size of magnetite in natural materials: Some results from lake sediments. Earth Planet Sci Lett 59:404–419CrossRefGoogle Scholar
  13. Korup O, Montgomery DR (2008) Tibetan plateau river incision inhibited by glacial stabilization of the Tsangpo gorge. Nature 455:786–789CrossRefGoogle Scholar
  14. Korup O, Montgomery DR, Hewitt K (2010) Glacier and landslide feedbacks to topographic relief in the Himalayan syntaxes. Proc Nat Acad Sci USA 107:5317–5322CrossRefGoogle Scholar
  15. Lang KA, Huntington KW, Montgomery DR (2013) Erosion of the Tsangpo Gorge by megafloods, Eastern Himalaya. Geology 41:1003–1006CrossRefGoogle Scholar
  16. Larsen IJ, Montgomery DR (2012) Landslide erosion coupled to tectonics and river incision. Nature Geosci 5:468–473CrossRefGoogle Scholar
  17. Liu T (1999) Hydrological characteristics of Yarlung Zangbo river. Acta Geographica Sinica 54:157–164Google Scholar
  18. Liu Q, Deng C, Yu Y, Torrent J, Jackson M, Banerjee S, Zhu R (2005) Temperature dependence of magnetic susceptibility in an argon environment: implications for pedogenesis of Chinese loess/palaeosols. Geophys J Int 161:102–112CrossRefGoogle Scholar
  19. Liu Q, Roberts AP, Torrent J, Horng C-S, Larrasoaña JC (2007) What do the HIRM and S-ratio really measure in environmental magnetism? Geochem Geophys Geosyst 8:Q09011.  https://doi.org/10.1029/2007GC001717 Google Scholar
  20. Liu QS, Roberts AP, Larrasoana JC, Banerjee SK, Guyodo Y, Tauxe L, Oldfield F (2012) Environmental magnetism: principles and applications. Rev Geophys 50:RG4002.  https://doi.org/10.1029/2012RG000393 CrossRefGoogle Scholar
  21. Liu WM, Cui P, Lai ZP, Ge YG, Hu KH, Zhang WJ, Su CJ, Yi ZY (2014) Sediment rock magnetic properties indicate outburst events for Gega dammed lake at the Tsangpo Gorge in the Tibetan Plateau. Chin J Geophys 57:2869–2877Google Scholar
  22. Liu W, Lai Z, Hu K, Ge Y, Cui P, Zhang X, Liu F (2015) Age and extent of a giant glacial-dammed lake at Yarlung Tsangpo gorge in the Tibetan Plateau. Geomorphology 246:370–376CrossRefGoogle Scholar
  23. Montgomery DR, Hallet B, Yuping L, Finnegan N, Anders A, Gillespie A, Greenberg HM (2004) Evidence for Holocene megafloods down the Tsangpo River gorge, southeastern Tibet. Quat Res 62:201–207CrossRefGoogle Scholar
  24. Oldfield F (2013) Mud and magnetism: records of late Pleistocene and Holocene environmental change recorded by magnetic measurements. J Paleolimnol 49:465–480CrossRefGoogle Scholar
  25. Ortega B, Caballero M, Lozano S, Vilaclara G, Rodríguez A (2006) Rock magnetic and geochemical proxies for iron mineral diagenesis in a tropical lake: Lago Verde, Los Tuxtlas, East-Central Mexico. Earth Planet Sci Lett 250:444–458CrossRefGoogle Scholar
  26. Roberts AP, Cui Y, Verosub KL (1995) Wasp-waisted hysteresis loops: mineral magnetic characteristics and discrimination of components in mixed magnetic systems. J Geophys Res 100:17909–17924CrossRefGoogle Scholar
  27. Scherler D, Munack H, Mey J, Eugster P, Wittmann H, Codilean AT, Kubik P, Strecker MR (2014) Ice dams, outburst floods, and glacial incision at the western margin of the Tibetan Plateau: a > 100 k.y. chronology from the Shyok Valley, Karakoram. Geol Soc Am Bull 126:738–758CrossRefGoogle Scholar
  28. Thompson R, Oldfield F (1986) Environmental magnetism. Allen & Unwin, LondonCrossRefGoogle Scholar
  29. Waitt RB (1985) Case for periodic, colossal jokulhlaups from Pleistocene glacial Lake Missoula. Geol Soc Am Bull 96:1271–1286CrossRefGoogle Scholar
  30. Walder JS, Costa JE (1996) Outburst floods from glacier-dammed lakes: the effect of mode of lake drainage on flood magnitude. Earth Surf Process Landforms 21:701–723CrossRefGoogle Scholar
  31. Wang P, Scherler D, Liu-Zeng J, Mey J, Avouac J-P, Zhang Y, Shi D (2014) Tectonic control of Yarlung Tsangpo Gorge revealed by a buried canyon in Southern Tibet. Science 346:978–981CrossRefGoogle Scholar
  32. Wu D, Zhou A, Liu J, Chen X, Wei H, Sun H, Yu J, Bloemendal J, Chen F (2015) Changing intensity of human activity over the last 2000 years recorded by the magnetic characteristics of sediments from Xingyun Lake, Yunnan, China. J Paleolimnol 53:47–60CrossRefGoogle Scholar
  33. Yang Y, Gao D, Li B (1996) A great geographical discovery in the end of 20th century- demonstration on the Yarlung Zangbo river valley as the greatest canyon in the word. Geogr Res 15:1–9 (in Chinese with English abstract) Google Scholar
  34. Zeitler PK, Meltzer AS, Koons PO, Craw D, Hallet B, Chamberlain CP, Kidd WSF, Park SK, Seeber L, Bishop M (2001) Erosion, Himalayan geodynamics, and the geomorphology of metamorphism. GSA Today 11:4–9CrossRefGoogle Scholar
  35. Zhang W (1985) Some features of the surge glacier in the Mt. Namjagbarwa. Mt Res 3:234–238 (in Chinese with English abstract) Google Scholar
  36. Zhong W, Wei Z, Shang S, Ye S, Tang X, Zhu C, Xue J, Ouyang J, Smol JP (2018) A 15,400-year record of environmental magnetic variations in sub-alpine lake sediments from the western Nanling Mountains in South China: implications for palaeoenvironmental changes. J Asian Earth Sci 154:82–92CrossRefGoogle Scholar

Copyright information

© Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2018

Authors and Affiliations

  • Weiming Liu
    • 1
    • 2
  • Gordon G. D. Zhou
    • 1
  • Yonggang Ge
    • 1
  • Runqiu Huang
    • 2
  1. 1.CAS Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina
  2. 2.State Key Laboratory of Geohazard Prevention and Geo-environment ProtectionChengdu University of TechnologyChengduChina

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