Hydrogeological evolution of the Luni river basin,Rajasthan, western India: A review |
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Authors: | V N Bajpai |
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Institution: | (1) Department of Geology, University of Delhi, 110 007 Delhi, India |
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Abstract: | The Luni river basin has been evolved as a result of typical hydrogeomorphic processes of arid zone, operating under the influence
of active tectonic lineaments. A detailed analysis of stream morphology in relation to geology and lineaments carried out
on selected windows indicated the morphological control of the streams while flowing over the lineaments from the eastern
to the western part of the basin. Typical valley fills indicated by dark green tone on digitally processed images and the
pediments showing greenish white tone appear in sharp contrast and indicate respectively the graben and horst structures.
A detailed identification of lineaments for the georesources and geological evaluation has been carried out. Earlier analysis
carried out on Bouguer anomalies correlate with graben and horst structures in the subsurface. Quaternary sequences have been
dated from 80 ka to 3 ka indicating a range of fluvial to aeolian deposits reflecting prevailing climatic conditions. However,
the changes in sediment type from coarse and mixed of all size grades to fine in a vertical litho-column warrant further studies
on fine resolution stratigraphy and high resolution stratigraphy for understanding climatic variations in the region |
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Keywords: | Lineament graben Bouguer anomaly FCC image valley fill pediment |
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