Geochemistry Of Proglacial Lake Deposits Of Upper Alaknanda Basin
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Date
2018, 2018
Authors
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Journal ISSN
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Publisher
Central University of Punjab
Abstract
Many researchers have recorded climatic upheaval in the Himalaya during the Late Quaternary. The chemical weathering in the Upper Alaknanda basin has changed
during the glacial and interglacial period. Different sediment archives such as pro-glacial
deposits and terrace deposits act as repository to understand the paleo-weathering
intensity of the sediment.In this study geochemistry of sediments of pro-glacial lake
deposits found in the Badirinath valley of upper Alaknanda basin was carried out to
understand the paleo-climate of the study area by identifying the clay minerals, intensity
of chemical weathering and to estimate the distance travelled from the source. The lake
deposits are thinly laminated and lack boulder and pebble layers. Sediment deposits at
the right bank of Alaknanda River near Bamini village are more likely lake deposits as
compare to left bank deposits which is terrace. By clay mineral identification, it is
concluded that the paleo-climate of the pro-glacial lake deposits were cold and is
deposited during glacial period. XRF analysis in terms of CIA calculation, A-CN-K plot
and A-CNK-FM plot suggests that there is low degree of chemical weathering occurred
in the study area. The percentage of clay silt fractionation calculation by gravity setting
method conforms that the sediment were not travelled far from their source.
Description
Keywords
Geochemistry, clay minerals, CIA, XRF analysis, XRD analysis
Citation
Ali, Yousuf (2018) Geochemistry Of Proglacial Lake Deposits
Of Upper Alaknanda Basin