Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6295
Title: Sr isotopic signature of the Ganga Alluvial Plain and its implication to Sr flux of the Ganga River System
Authors: Singh, Sandeep
Singh M.
Choudhary A.K.
Saxena A.
Singh I.B.
Jain A.K.
Published in: International Journal of Earth Sciences
Abstract: The influx of Sr responsible for increase in marine Sr has been attributed to rise of Himalaya and weathering of the Himalayan rocks. The rivers draining Himalaya to the ocean by the northern part of the Indian sub-continent comprising the Ganga Alluvial Plain (GAP) along with Central parts of the Himalaya and the northern part of the Indian Craton are held responsible for the transformation of Sr isotopic signature. The GAP is basically formed by the Himalayan-derived sediments and serves as transient zone between the source (Himalaya) and the sink (Bay of Bengal). The Gomati River, an important alluvial tributary of the Ganga River, draining nearly 30,500 km2 area of GAP is the only river which is originating from the GAP. The river recycles the Himalayan-derived sediments and transport its weathering products into the Ganga River and finally to Bay of Bengal. 11 water samples were collected from the Gomati River and its intrabasinal lakes for measurement of Sr isotopic composition. Sr concentration of Gomati River water is about 335 ?g/l, which is about five times higher than the world's average of river water (70 ?g/l) and nearly three times higher than the Ganga River water in the Himalaya (130 ?g/l) The Sr isotopic ratios reported are also higher than global average runoff (0.7119) and to modern seawater (0.7092) values. Strong geochemical sediment-water interaction appearing on surface is responsible for the dissolved Sr isotopic ratios in the River water. Higher Sr isotopic rations found during post-monsoon than in pre-monsoon season indicate the importance of fluxes due to monsoonal erosion of the GAP into the Gomati River. Monsoon precipitation and its interaction with alluvium appear to be major vehicle for the addition of dissolved Sr load into the alluvial plain rivers. This study establishes that elevated 87Sr/86Sr ratios of the Gomati River are due to input of chemical weathering of alluvial material present in the Ganga Alluvial Plain. © 2009 Springer-Verlag.
Citation: International Journal of Earth Sciences (2010), 99(8): 1991-1997
URI: https://doi.org/10.1007/s00531-009-0479-4
http://repository.iitr.ac.in/handle/123456789/6295
Issue Date: 2010
Keywords: Ganga Alluvial Plain
Gomati River
Himalaya
Intrabasinal lake
Sr flux
ISSN: 14373254
Author Scopus IDs: 7406400956
57214312795
7102838901
7401482386
7401774897
7404463053
Author Affiliations: Singh, S., Department of Earth Science, Indian Institute of Technology Roorkee, Roorkee 247667, India
Singh, M., Department of Geology, University of Lucknow, Lucknow 226007, India
Choudhary, A.K., Institute Instrumentation Centre, Indian Institute of Technology Roorkee, Roorkee 247667, India
Saxena, A., Department of Geology, University of Lucknow, Lucknow 226007, India
Singh, I.B., Department of Geology, University of Lucknow, Lucknow 226007, India
Jain, A.K., Department of Earth Science, Indian Institute of Technology Roorkee, Roorkee 247667, India
Corresponding Author: Singh, S.; Department of Earth Science, Indian Institute of Technology Roorkee, Roorkee 247667, India; email: sandpfes@iitr.ernet.in
Appears in Collections:Journal Publications [ES]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.