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Fashion and phases of late Pleistocene aggradation and incision in the Alaknanda River Valley, western Himalaya, India

Published online by Cambridge University Press:  20 January 2017

Pradeep Srivastava ,
Jayant K. Tripathi ,
R. Islam  and
Manoj K. Jaiswal
Pradeep Srivastava*
Affiliation:
Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun 248001, India
Jayant K. Tripathi
Affiliation:
Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun 248001, India
R. Islam
Affiliation:
Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun 248001, India
Manoj K. Jaiswal
Affiliation:
Wadia Institute of Himalayan Geology, 33 GMS Road, Dehradun 248001, India
*
*Corresponding author. E-mail address:Pradeep@wihg.res.in (P. Srivastava).
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Abstract

We study the aggradation and incision of the Alaknanda River Valley during the late Pleistocene and Holocene. The morphostratigraphy in the river valley at Deoprayag shows the active riverbed, a cut terrace, and a fill terrace. The sedimentary fabric of the fill terrace comprises four lithofacies representing 1) riverbed accretion, 2) locally derived debris fan, 3) the deposits of waning floods and 4) palaeoflood records. The sedimentation style, coupled with geochemical analysis and Optically Stimulated Luminescence (OSL) dating, indicate that this terrace formed in a drier climate and the river valley aggraded in two phases during 21–18 ka and 13–9 ka. During these periods, sediment supply was relatively higher. Incision began after 10 ka in response to a strengthened monsoon and aided by increase of the tectonic gradient. The cut terrace formed at ~ 5 ka during a phase of stable climate and tectonic quiescence. The palaeoflood records suggest wetter climate 200–300 yr ago when the floods originated in the upper catchment of the Higher Himalaya and in the relatively drier climate ~ 1.2 ka when locally derived sediments from the Lesser Himalaya dominated flood deposits. Maximum and minimum limits of bedrock incision rate at Deoprayag are 2.3 mm/a and 1.4 mm/a.

Keywords

NW HimalayaAlaknanda River terracesRiver aggradation historySediment GeochemistryChemical Index of AlterationOSL chronology
Type
Original Articles
Information
Quaternary Research , Volume 70 , Issue 1 , July 2008 , pp. 68 - 80
Copyright
University of Washington

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References

Ahmad, T., Harris, N., Bickle, M., Chapman, H., Bunbury, J., Prince, C., (2000). Isotopic constraints on the structural relationships between the Lesser Himalayan Series and High Himalayan Crystalline Series, Garhwal Himalaya.. Bulletin of the Geological Society of America 112, 467–477.2.0.CO;2>CrossRefGoogle Scholar
Aitken, M.J., (1998). An Introduction to Optical Dating.. Academic Press, London.Google Scholar
Attal, M., Lavé,, J., (2006). Changes of bedload characteristics along the Marsyandi River (central Nepal): implications for understanding hillslope sediment supply, sediment load evolution along fluvial networks, and denudation in active orogenic belts.. Geological Society of America Special Paper 398, 143–171.Google Scholar
Barnard, P.L., Owen, L.A., Sharma, M.C., Finkel, R.C., (2001). Natural and human induced landsliding in the Garhwal Himalaya, northern India.. Geomorphology 40, 21–35.CrossRefGoogle Scholar
Bock, B., McLennan, S.M., Hanson, G.N., (1998). Geochemistry and provenance of the Middle Ordovician Austin Glen Member (Normanskill Formation) and the Taconian Orogeny in New England.. Sedimentology 45, 635–655.CrossRefGoogle Scholar
Bookhagen, B., (2004). Late Quaternary climatic changes and landscape evolution in NW India. Unpublished Ph.D. Thesis, Potsdam University, Germany., 78 p.Google Scholar
Bookhagen, B., Thiede, R.C., Strecker, M.R., (2005). Abnormal monsoon years and their control on erosion and sediment flux in the high, arid northwest Himalaya.. Earth and Planetary Science Letters 231, 131–146.CrossRefGoogle Scholar
Bookhagen, B., Fleitmann, D., Neidermann, S., Nishiizumi, K., Strecker, M.R., Thiede, R.C., (2006). Holocene climatic changes and its impact on fluvial system in Sutlej valley, NW India.. Geophysical Research Abstracts 8, 9924.Google Scholar
Chauhan, O.S., (2003). Past 20,000-year history of Himalayan aridity: evidence from oxygen isotope records in the Bay of Bengal.. Current Science 84, 90–93.Google Scholar
Clift, P.D., Blusztajn, J., (2005). Reorganization of the western Himalayan river system after five million years ago.. Nature 438, 1001–1003.CrossRefGoogle ScholarPubMed
Fedo, C.M., Nesbitt, H.W., Young, G.M., (1995). Unravelling the effects of potassium metasomatism in sedimentary rocks and paleosols, with implications for palaeoweathering conditions and provenance.. Geology 23, 921–924.2.3.CO;2>CrossRefGoogle Scholar
Islam, R., Ghosh, S.K., Sachan, H.K., (2002). Geochemical characterization of the Neoproterozoic Nagthat siliciclastics, NW Kumaun Lesser Himalaya: implication for source rock assessment.. Journal of the Geological Society of India 60, 91–105.Google Scholar
Jain, M., Murray, A.S., Lars, Botter-Jensen, (2004). Optically stimulated luminescence dating: how significant is incomplete light exposure in fluvial environments?. Quaternaire 15, 143–157.Google Scholar
Lavé, J., Avouac, J.P., (2000). Active folding of fluvial terraces across the Siwalik Hills, Himalayas of central Nepal.. Journal of Geophysical Research, B, Solid Earth and Planets 105, 5735–5770.CrossRefGoogle Scholar
McLennan, S.M., (1993). Weathering and global denudation.. Journal of Geology 101, 295–303.Google Scholar
Molnar, P., (2003). Nature, nurture and landscape.. Nature 426, 612–614.CrossRefGoogle ScholarPubMed
Mukul, M., (2000). The geometry and kinematics of Main Boundary Thrust and related neotectonics in the Darjiling Himalayan fold-and-thrust belt, West Bengal, India.. Journal of Structural Geology 22, 1261–1283.Google Scholar
Mukul, M., Jaiswal, M.K., Singhvi, A.K., (2007). Timing of recent out-of-sequence deformation in the frontal Himalayan wedge: insights from Darjiling sub-Himalaya, India.. Geology 35, 999–1002.CrossRefGoogle Scholar
Murray, A.S., Wintle, A.G., (2000). Luminescence dating of quartz using an improved single aliquot regenerative-dose protocol.. Radiation Measurements 32, 57–73.CrossRefGoogle Scholar
Najman, Y., (2005). The detrital record of orogenesis: a review of approaches and techniques used in the Himalayan sedimentary basins.. Earth Science Reviews 74, 1–72.Google Scholar
Nesbitt, H.W., Young, G.M., (1982). Early Proterozoic climates and plate motions inferred from major element chemistry of lutites.. Nature 299, 715–717.CrossRefGoogle Scholar
Nesbitt, H.W., Young, G.M., (1989). Formation and digenesis of weathering profiles.. Journal of Geology 97, 129–147.CrossRefGoogle Scholar
Nesbitt, H.W., Fedo, C.M., Young, G.M., (1997). Quartz and feldspar stability, steady state and non-steady state weathering, and petrogenesis of siliciclastic sands and muds.. Journal of Geology 105, 173–191.Google Scholar
Nichols, G., (1999). Sedimentology and Stratigraphy.. Blackwell Science, Malden, MA. 355 pp.Google Scholar
Norrish, K., Hutton, J.T., (1969). An accurate X-ray spectrographic method for the analysis of a wide range of geological samples.. Geochimica et Cosmochimica Acta 33, 431–453.CrossRefGoogle Scholar
Olley, J.M., Caitcheon, G., Murray, A., (1998). The distribution of apparent dose as determined by optically stimulated luminescence in small aliquots of fluvial quartz: implications for dating young sediments.. Quaternary Science Reviews 17, 1033–1040.Google Scholar
Pal, S.K., (1986). Geomorphology of river terraces along Alaknanda Valley, Garhwal Himalaya.. B.R. Publishing Corporation, Delhi. 158 pp.Google Scholar
Pratt, S.B., Burbank, D.W., Heimsath, A., Ojha, T., (2004). Landscape disequilibrium on 1000–10,000 year scales Marsyandi River, Nepal, central Himalaya.. Geomorphology 58, 223–241.Google Scholar
Robinson, D.M., DeCelles, P.G., Patchet, P.J., Garzione, C.N., (2001). The kinematic evolution of the Nepalese Himalaya interpreted from Nd isotopes.. Earth and Planetary Science Letters 192, 507–521.CrossRefGoogle Scholar
Seeber, L., Gornitz, V., (1983). River profiles along the Himalayan arc as indicators of active tectonics.. Tectonophysics 92, 335–367.Google Scholar
Selvaraj, K., Chen, C.T.A., (2006). Moderate chemical weathering of subtropical Taiwan: constraints from solid-phase geochemistry of sediments and sedimentary rocks.. Journal of Geology 114, 101–116.Google Scholar
Srivastava, R.N., Ahmad, A., (1979). Geology and structure of Alaknanda Valley, Garhwal Himalaya.. Himalayan Geology 9, 225–254.Google Scholar
Srivastava, P., Misra, D.K., (2008). Morpho-sedimentary records of active tectonics at the Kameng river exit, NE Himalaya.. Geomorphology 96, 187–198.CrossRefGoogle Scholar
Srivastava, P., Singh, I.B., Sharma, M., Singhvi, A.K., (2003). Luminescence chronology and Late Quaternary geomorphic history of Ganga Plain, India.. Palaeogeography Palaeoclimatology Palaeoecology 197, 15–41.Google Scholar
Srivastava, P., Brook, G.A., Marais, E., Morthekai, P., Singhvi, A.K., (2007). Depositional environment and OSL chronology of Homeb silt deposits, Kuiseb River, Namibia.. Quaternary Reseacrh 65, 478–491.Google Scholar
Starkel, L., (2003). Climatically controlled terraces in uplifting mountain areas.. Quaternary Science Reviews 22, 2189–2198.Google Scholar
Taylor, S.R., McLennan, S.M., (1985). The Continental Crust: Its Composition and Evolution.. Blackwell Scientific Publications, Oxford. 312p.Google Scholar
Tripathi, J.K., Rajamani, V., (1999). Geochemistry of the loessic sediments on Delhi ridge, eastern Thar desert, Rajasthan: implication for exogenic processes.. Chemical Geology 155, 265–278.CrossRefGoogle Scholar
Tripathi, J.K., Rajamani, V., (2003). Geochemistry of Delhi quartzites: implications for the provenance and source area weathering.. Journal of the Geological Society of India 62, 215–226.Google Scholar
Valdiya, K.S., (1980). Geology of Kumaun Lesser Himalaya.. Wadia Institute of Himalayan Geology, Dehra Dun. 291 pp.Google Scholar
Vance, D., Bickle, M., Ivy-Ochs, S., Kubik, P.W., (2003). Erosion and exhumation in the Himalaya from cosmogenic isotope inventories of river sediments.. Earth and Planetary Science Letters 206, 273–288.Google Scholar
Wasson, R.J., Juyal, N., Jaiswal, M., McCulloch, M., Sarin, M.M., Jain, V., Srivastava, P., Singhvi, A.K., in press. The Mountain-Lowland Debate: deforestation and Sediment Transport in the Upper Ganga Catchment. Environmental Management.Google Scholar
Wobus, C., Heimsath, A., Whipple, K., Hodges, K., (2005). Active out-of-sequence thrust faulting in the central Nepalese Himalaya.. Nature 434, 1008–1011.Google Scholar